Novel Paintbrush

Abstract

A paintbrush features an elongated handle with an interior passage and a head with a wider interior cavity. The handle defines an inlet at its first end and an outlet at its second end, which fluidly connects to the head's inlet, forming a continuous fluid flow path to the head's outlet. The head's interior cavity includes a first longitudinal section configured as a temporary fluid retention chamber and a second longitudinal section configured as a sleeve for a plug with drainage holes. The handle may have a tapered external profile and an exterior gripping surface. An endcap may be releasably attached to the handle's first end, which may also be configured for fluid source attachment.

Claims

1. A paintbrush, comprising: a handle extending longitudinally along a central axis from a proximal handle end to a distal handle end, said handle defined as an elongated hollow tube having an interior passage extending from said proximal handle end to said distal handle end, said proximal handle end defining an opening serving as an inlet and said distal handle end defining an opening serving as an outlet; and a head extending longitudinally along said central axis from a proximal head end to a distal head end, said proximal head end depending from said distal handle end, said head defining an interior cavity extending from said proximal head end to said distal head end, said internal cavity having a wider cross-sectional dimension than said interior passage of said handle, said proximal head end defining an opening serving as an inlet and said distal head end defining an opening serving as an outlet, wherein said interior passage of said handle and said interior cavity of said head together form a continuous fluid flow path.

2. The paintbrush of claim 1, wherein said head comprises: a first longitudinal section extending along said central axis from said proximal head end to a transition point, said first longitudinal section having internal surfaces defining a temporary fluid retention chamber within said interior cavity; a second longitudinal section extending along said central axis from said transition point to said distal head end, said second longitudinal section having internal surfaces defining a sleeve within said interior cavity; and a plug having a plurality of drainage holes extending longitudinally along said central axis from a first plug end to a second plug end, said plug configured to fit within said sleeve of said second longitudinal section; wherein said first longitudinal section facilitates fluid flow from said interior passage of said handle to said second longitudinal section.

3. The paintbrush of claim 2, wherein said first longitudinal section has a curved profile extending arcuately outwardly relative to said central axis and said second longitudinal section has a substantially linear profile that is substantially parallel to said central axis.

4. The paintbrush of claim 2, wherein said plug is chemically bonded to said internal surfaces of said second longitudinal section that define said sleeve along a peripheral surface extending continuously around said plug between said first plug end and said second plug end.

5. The paintbrush of claim 2, wherein said drainage holes are sized to accommodate the flow of water or other cleaning fluids therethrough while preventing backflow of paint from bristles embedded at said second plug end.

6. The paintbrush of claim 1, further comprising an endcap depending from said proximal handle end, wherein said endcap is releasably coupled to said proximal handle end.

7. The paintbrush of claim 6, wherein said proximal handle end is configured with a female-threaded member that mates with a male-threaded member of said endcap.

8. The paintbrush of claim 6, wherein said endcap has a hook hole.

9. The paintbrush of claim 1, wherein said handle has a cross-sectional dimension defined by an inner diameter and a wall thickness, said cross-sectional dimension of said handle changing progressively along said central axis between said proximal and distal handle ends, defining a tapered external profile.

10. The paintbrush of claim 9, wherein said cross-sectional dimension of said handle increases in a direction from said proximal handle end to said distal handle end.

11. The paintbrush of claim 9, wherein said cross-sectional dimension of said handle decreases in a direction from said proximal handle end to said distal handle end.

12. The paintbrush of claim 9, wherein said change in said cross-sectional dimension of said handle is due to a variation in wall thickness, such that said inner diameter remains substantially constant along said central axis.

13. The paintbrush of claim 9, wherein said change in said cross-sectional dimension of said handle is due to a change in said inner diameter and said wall thickness.

14. The paintbrush of claim 9, wherein said cross-sectional dimension of said handle at said proximal handle end differs from said cross-sectional dimension of said handle at said distal handle end by between 23% and 29%.

15. The paintbrush of claim 9, wherein said cross-sectional dimension of said handle at said proximal handle end differs from said cross-sectional dimension of said handle at said distal handle end by between 27.2% and 27.4%.

16. The paintbrush of claim 1, wherein said handle has an exterior gripping surface that is formed of a helical wrap-around ridged surface.

17. The paintbrush of claim 1, wherein said handle and said head are integrally formed as a unitary structure.

18. The paintbrush of claim 1, wherein said handle and said head are fused together to form a unitary structure.

19. The paintbrush of claim 1, wherein said proximal handle end is configured with a female-threaded member capable of releasably attaching to a fluid source.

20. A paintbrush, consisting of: a handle extending longitudinally along a central axis from a proximal handle end to a distal handle end, said handle defined as an elongated hollow tube having an interior passage extending from said proximal handle end to said distal handle end, said proximal handle end defining an opening serving as an inlet and said distal handle end defining an opening serving as an outlet, said proximal handle end configured with a female-threaded member capable of releasably attaching to a fluid source, said handle having a cross-sectional dimension defined by an inner diameter and a wall thickness, said cross-sectional dimension of said handle changing progressively along said central axis between said proximal and distal handle ends, defining a tapered external profile, wherein said change in said cross-sectional dimension of said handle is due to a variation in wall thickness such that said inner diameter remains substantially constant along said central axis, or due to a change in said inner diameter and said wall thickness, and wherein said cross-sectional dimension of said handle at said proximal handle end differs from said cross-sectional dimension of said handle at said distal handle end by between 23% and 29%, said handle having an exterior gripping surface formed of a helical wrap-around ridged surface; a head extending longitudinally along said central axis from a proximal head end to a distal head end, said proximal head end depending from said distal handle end, said head defining an interior cavity extending from said proximal head end to said distal head end, said internal cavity having a wider cross-sectional dimension than said interior passage of said handle, said proximal head end defining an opening serving as an inlet and said distal head end defining an opening serving as an outlet, wherein said interior cavity of said head comprises: a first longitudinal section extending along said central axis from said proximal head end to a transition point, said first longitudinal section having internal surfaces defining a temporary fluid retention chamber and having a curved profile extending arcuately outwardly relative to said central axis; a second longitudinal section extending along said central axis from said transition point to said distal head end, said second longitudinal section having a substantially linear profile that is substantially parallel to said central axis and having internal surfaces defining a sleeve; and a plug having a plurality of drainage holes extending longitudinally along said central axis from a first plug end to a second plug end, said plug configured to fit within said sleeve defined by said internal surfaces of said second longitudinal section, wherein said plug is chemically bonded to said internal surfaces of said second longitudinal section that define said sleeve along a peripheral surface extending continuously around said plug between said first plug end and said second plug end, and wherein said drainage holes are sized to accommodate the flow of water or other cleaning fluids therethrough while preventing backflow of paint from bristles embedded at said second plug end; and an endcap depending from said proximal handle end, said endcap comprising a male-threaded member configured to releasably mate with said female-threaded member on said proximal handle end; wherein said interior passage of said handle and said interior cavity of said head together form a continuous fluid flow path; and wherein said handle and said head are integrally formed as a unitary structure.

Description

BRIEF DESCRIPTION OF DRAWINGS

[0015] FIG. 1 is a side elevation view of a paintbrush (without bristles) according to one embodiment of the present invention.

[0016] FIG. 2 is a top plan view of the paintbrush of FIG. 1.

[0017] FIG. 3 is an end-on view of the paintbrush of FIGS. 1 and 2 with the endcap attached, taken along the longitudinal axis, looking distally from the proximal end of the paintbrush towards its distal end.

[0018] FIG. 4 is an exploded perspective view of the paintbrush of FIGS. 1 and 2, showing the endcap in a detached position relative to the handle the components prior to assembly.

[0019] FIG. 5 is a perspective view of the paintbrush of FIGS. 1 and 2.

[0020] FIG. 6 is a side elevation view a paintbrush, shown without the endcap and illustrating relative dimensions of the handle and heads, as well as an angle of curvature of the head, according to one embodiment of the present invention

[0021] FIG. 7 is a top plan view, partially in cross-section, of the paintbrush of FIGS. 1 and 2, illustrating an interior channel and relative dimensions, according to one embodiment of the present invention.

[0022] FIG. 8 is a side elevation view of the paintbrush of FIG. 7, without dimensions.

[0023] FIG. 9 is an end-on view of the open proximal end of the handle (with the endcap removed and not shown), showing the cavity inlet on the handle end, according to one embodiment of the present invention.

[0024] FIG. 10 is an end-on view of the open of the distal end of the head, showing the widened interior cavity outlet on the distal end of the head, according to one embodiment of the present invention.

[0025] FIG. 11 is a perspective view, with a portion broken away and in section, showing internal features of the head and bristles, according to one embodiment of the present invention.

[0026] FIG. 12 is a perspective view of the paintbrush of FIG. 11, showing bristles and a plug exploded from the head, according to one embodiment of the present invention.

[0027] FIG. 13A is a side view of the handle portion of the paintbrush, showing a surface feature thereon, according to one embodiment of the present invention.

[0028] FIG. 13B is an enlarged view of Detail A of FIG. 13A, illustrating a helical ridged surface feature provided on the exterior of the handle, according to one embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

[0029] The following detailed description illustrates exemplary embodiments of the present invention. These embodiments are provided by way of example and not limitation. Where possible, like reference numbers may be used to denote similar elements across different figures or embodiments.

[0030] Referring generally to the figures, and more particularly to FIGS. 1-2 and 4-5, a paintbrush 10 is illustrated according to one or more embodiments of the present invention. Paintbrush 10 is shown having an elongated handle 20 extending along a central longitudinal axis from a proximal end 22 to a distal end 24, an endcap 30 disposed at proximal end 22, and a head 40 disposed at distal end 24.

[0031] In the context of paintbrush 10 and its constituent elements, such as the handle 20, endcap 30, and head 40, the terms proximal and distal (and variations like, but not limited to, proximal end and distal end) are used to denote relative positioning along a common longitudinal axis, based on the typical orientation of paintbrush 10 during use. Generally, proximal refers to a position or end closer to the user's body, while distal refers to a position or end further away from the user's body. Specifically, for handle 20, its proximal end 22 is the terminal end closest to the user during ordinary use, and its distal end 24 is the opposite terminal end, oriented away from the user. For other elements like the endcap 30 and head 40, their respective proximal ends (e.g., endcap proximal end 32 and head proximal end 42) and distal end (e.g., endcap distal end 34 and head distal end 44) refer to their terminal ends positioned along, or relative to, the same longitudinal axis established by the handle's orientation. Throughout this description and in the claims, the terms first and second, when used with ends, regions, sections, or other portions of an element (e.g., first end and second section), are interchangeable with proximal and distal, respectively, in terms of their relative positioning. This means that if an element has a first portion and a second portion, the first portion is generally located closer to the overall proximal end 12 of paintbrush 10 (or the proximal end of the element in question) than the second portion. Similarly, the second portion is generally located closer to the overall distal end 14 of paintbrush 10 (or the distal end of the element in question) than the first portion. It's important to note that this doesn't necessarily imply the second portion is physically closer to the absolute distal end 14 of paintbrush 10 than to its absolute proximal end 12; instead, it indicates its relative position with respect to the first portion of that same element.

[0032] As is well known in the art, handle 20 conventionally serves as a gripping and manipulation structure, and head 40 conventionally serves to retain and provide structural support for bristles 60 (see FIGS. 11 and 12). In the context of the present disclosure, handle 20 and head 40 are further configured to facilitate fluid delivery and controlled washing of bristles 60, as will be described in further detail below.

[0033] In one or more embodiments, handle 20 is configured as a hollow, tubular shaft defining an interior longitudinal passage/channel 26 extending from proximal end 22 to distal end 24 (see FIGS. 7 and 8). Proximal end 22 defines a proximal end opening 23, which may also be referred to herein as an inlet 23. Distal end 24 defines a distal end opening 25, which may also be referred to herein as an outlet 25. Inlet 23 and outlet 25 are so-named due to their respective functionsi.e., inlet 23 is configured to receive fluids from an external fluid source (e.g., a typical faucet, garden hose or fluid-containing vessel) and outlet 25 is configured to direct/discharge the received fluids into a widened interior cavity 46 of head 40 (which may be referred to herein as simply interior cavity 46), as will be described below in further detail. Passage 26 thus provides a (fluid) flow path along the central longitudinal axis from inlet 23 to outlet 25 (and thereafter into interior cavity 46 of head 40 with which outlet 25 is in fluid communication).

[0034] In one or more embodiments, endcap 30 is configured with a hook hole 31 near its proximal end 32 (see FIGS. 2, 4-5 and 7) and extends longitudinally to a male-threaded section 33 at its distal end 34 (see FIGS. 4 and 7-8). (It is understood that distal end 34 may refer to the distal end of male-threaded section 33 or to the main body of endcap 30, as clarified by context.) Male-threaded section 33 is configured to releasably engage a female-threaded section 28 located at proximal end 22 of handle 20. Specifically, proximal end 22 of handle 20 includes, or is integrally formed with, female-threaded section 28. Endcap 30 may serve to temporarily seal the water flow path of passage 26 at inlet 23for example, when fluid flow/cleaning is not desired. A sealing element 35 (e.g., an O-ring or washer) may be integrated to provide a watertight seal during threaded engagement between the two partsi.e., between female-threaded section 28 of handle 20 and male-threaded section 33 of endcap 30.

[0035] In one or more embodiments, the coupling or engagement between proximal end 22 of handle 20 and distal end 34 of endcap 30 is achieved through a releasable, non-threaded engagement mechanism. In this configuration, the coupling may include, but is not limited to, a bayonet-style interface, a spring-loaded ball detent system, a snap-fit configuration, or a cam-lock mechanism, or other known suitable coupling systems.

[0036] In one or more embodiments, as illustrated in FIG. 4, paintbrush 10 may be configured without endcap 30, which is shown separated from handle 20 in a partial exploded view. In this embodiment, proximal end 22 of handle 20 is also the proximal end of paintbrush 10. Additionally, handle 20 is configured to maintain structural integrity during ordinary use of paintbrush 10 despite the absence of endcap 30. Such structural integrity may be the result of a particular composition of the wall structure of handle 20, one or more internal reinforcing elements, or a combination thereof. Furthermore, the structural integrity of handle 20 may be further enhanced by the addition of a gripping surface 21, which is described below in further detail.

[0037] In one or more embodiments, head 40 is configured to have a bell-shaped (or bowl-shaped) external profile (see FIGS. 2, 4, 5, 7 and 11-12) and a hollow, interior cavity 46 extending longitudinally from a proximal end 42adjacent to distal end 24 of handle 20to a distal end 44 (see FIGS. 10-12). Proximal end 42 defines a proximal end opening 43, which may also be referred to herein as an inlet 43. Distal end 44 defines a distal end opening 45, which may also be referred to herein as an outlet 45. Inlet 43 and outlet 45 are so-named due to their respective functionsi.e., inlet 43 is configured to receive fluids from passage 26 via outlet 25 (of handle 20) and outlet 45 is configured to direct/discharge the received fluids to wash and clean bristles 60 embedded in, and/or depending from, head 40. The coupling of handle 20 (at its distal end 24) to head 40 (at its proximal end 42) forms a continuous open passage or fluid flow channel from inlet 23 (of handle 20) to the inside of widened interior cavity 46 along the same central axis.

[0038] In one or more embodiments, head 40 further includes a first longitudinal section 40a beginning at proximal end 42, and a second longitudinal section 40b extending from the first longitudinal section 40a to distal end 44. First longitudinal section 40a features sidewalls 41 that extend arcuately and outwardly relative to the central longitudinal axis of paintbrush 10, forming a generally convex, bowl-shaped external profile in longitudinal cross-section. Head 40 transitions from first longitudinal section 40a into second longitudinal section 40b at a specific longitudinal position between proximal end 42 and distal end 44, referred to as a transition point 48. In second longitudinal section 40b, sidewalls 41 extend generally linearly, substantially parallel to the central longitudinal axis, continuing to distal end 44. In one embodiment, sidewalls 41 of second longitudinal section 40b may be precisely parallel to the central longitudinal axis. In another embodiment, sidewalls 41 of second longitudinal section 40b may extend with a slight outward angle (diverging away from the central longitudinal axis). In yet another embodiment, sidewalls 41 of second longitudinal section 40b may extend with a slight inward angle (converging towards the central longitudinal axis). When angled inward, sidewalls 41 may further feature a slight inward curvature towards the central longitudinal axis.

[0039] The longitudinal position of transition point 48 may vary along the length of head 40. For example, transition point 48 may be located approximately at, or near, a midpoint (i.e., at, or about, equidistant) between proximal end 42 and distal end 44. In another embodiment, transition point 48 may be positioned closer to proximal end 42 or closer to distal end.

[0040] First longitudinal section 40a may also be referred to herein as proximal section 40a or proximal head section 40a. Similarly, second longitudinal section 40b may also be referred to herein as distal section 40b or distal head section 40b.

[0041] In one or more embodiments, interior cavity 46, which constitutes the interior space of head 40, is defined by various internal surfaces (e.g., 46a, 46b) corresponding to the head's external sections (40a, 40b). Beginning at proximal end 42 and extending until transition point 48, internal surfaces 46a of first longitudinal section 40a feature a curved profile that extends upwardly and radially outwardly relative to the central longitudinal axis in a continuous arcuate manner, forming a concave interior contour. These internal surfaces 46a define a temporary fluid retention chamber, configured to retain liquids received from handle 20 via outlet 25 and inlet 43. From transition point 48 until distal end 44, internal surfaces 46b of second longitudinal section 40b are at least substantially linear and extend generally parallel to the central longitudinal axis, terminating at distal end 44. These internal surfaces 46b define a sleeve, configured to receive and retain a flow-through plug 50. Plug 50 is configured with a plurality of through-holes or drainage holes 56 extending between its proximal end 52 and its distal end 54. The drainage holes 56 are sized and positioned to allow fluid passage from the region (of interior cavity 46) defined by internal surfaces 46a, through plug 50, and towards distal end 14 of paintbrush 10 to wash and clean bristles 60 embedded therein. The designation of the space defined by internal surfaces 46a as a temporary fluid retention chamber highlights its fluid intake capacitywhich fills up with fluids exiting passage 26 via inlet 43being greater than its drainage capacity via drainage holes 56 in plug 50.

[0042] As used herein, the term longitudinal section refers to a portion of the element located along a specified segment of the central longitudinal axis and does not necessarily imply that the section itself is elongated in shape.

[0043] In one or more embodiments, each one of the plurality of drainage holes 56 measures about 3/32-inch diameter (2.4 mm). It will be appreciated that the appropriate diameter may be selected based on the viscosity and flow characteristics of the substance being drained; for example, fluids with a thicker or more viscous constitution may allow for larger drainage holes, while fluids with lower viscosity and more free-flowing characteristics may require a smaller diameter to minimize the potential for backflow. The specified diameter of 3/32 inch is advantageous in reducing the risk of backflow of paint from bristles 60 into (and through) drainage holes 56 (and possibly, into the space defined by internal surfaces 46a of first longitudinal section 40a). It should be understood that this dimension is provided by way of non-limiting example, and that other diameters, including but not limited to sizes in the range of approximately 1/16 inch to inch (or 1.6 mm to 3.5 mm), may also be suitable and are contemplated as falling within the scope of this disclosure. Additionally, in one or more embodiments, multiple drainage holes of varying diameters may be provided in combination to achieve desired drainage and backflow prevention characteristics (e.g., if different fluid cleaning types are used at different times or in a mixture).

[0044] In one or more embodiments, plug 50 is chemically bonded to head 40 via the internal surfaces 46b of second longitudinal section 40b by an adhesive medium, such as an epoxy resin. Proximal end 62 of bristles 60 is embedded at, and/or depends from, distal end 54 of plug 50i.e., the roots of bristles 60 are embedded within the adhesive medium for structural retention to paintbrush 10. In one embodiment, second longitudinal section 40b extends longitudinally past the distal end 54 of plug 50, such that plug 50 does not occupy the entire length of the sleeve defined by internal surfaces 46b. In such configuration, the proximal ends 62 of bristles 60 are housed within this recessed portion of head 40 (i.e., within second longitudinal section 40b, inward of distal end 44 of head 40), while the bulk of bristles 60 extends outwards from distal end 44. As used herein, the peripheral surface of plug 50 refers to the entire exterior surface of the plug extending continuously around its longitudinal axis, specifically between its first plug end 52 (also referred to as its proximal end) and its second plug end 54 (also referred to as its distal end), thereby excluding said first plug end 52 and said second plug end 54.

[0045] In one or more embodiments, as generally understood and demonstrated in the drawings, the diameter of handle 20 at its proximal end 22 is different than the diameter at its distal end 24. This imparts a tapered configuration on handle 20 according to one embodiment of the present invention. The taper configuration may be constructed and arranged to impart ergonomic advantages for the user. In one embodiment, the taper configuration has a diameter increase of handle 20 from its proximal end 22 to its distal end 24 between about 23% and about 29%. (In one embodiment, the percentage difference is exactly between 23% and 29%.) In one embodiment, the taper configuration has a diameter increase of handle 20 from proximal end 22 to distal end 24 between about 24% and about 28%. (In one embodiment, the percentage difference is exactly between 24% and 28%.) In one embodiment, the taper configuration has a diameter increase of handle from proximal end 22 to distal end 24 between about 27.2 and about 27.4%. (In one embodiment, the percentage difference is exactly between 27.2% and 27.4%.) Further details of these embodiments are provided below.

[0046] In one or more embodiments, the taper configuration has a diameter decrease of handle 20 from its proximal end 22 to its distal end 24 between 23-29%. In one embodiment, the taper configuration has a diameter decrease of handle 20 from proximal end 22 to distal end 24 between 24-28%. In one embodiment, the taper configuration has a diameter decrease of handle from proximal end 22 to distal end 24 between 27.2-27.4%. Further details are provided below in connection with FIG. 6.

[0047] In one or more embodiments, passage 26 of handle 20 maintains a substantially constant internal diameter throughout its length, such that the taper reflects only a change in the wall thickness of handle 20 and is present on the exterior surface thereof. In another embodiment, passage 26 is tapered, with the internal diameter increasing from inlet 23 toward outlet 25. (In an embodiment as depicted in FIG. 6, the internal diameter decreases from inlet 23 toward outlet 25, as previously described.) The tapering of the internal and external profiles may occur independently or in combination.

[0048] In one or more embodiments, as shown in FIGS. 6 and 7, due to the outward curvature of first longitudinal section 40a, as previously described, the cross-sectional dimension of distal end 44 is larger than the cross-sectional dimension of proximal end 42. Similarly, the cross-sectional dimension of distal end 44 is larger than the cross-sectional dimension of handle 20 (which may be variable, as will be described below in further detail).

[0049] As used herein, the term cross-sectional dimension of handle 20 refers to a measurement that includes both the inner diameter of passage 26 and the thickness of the surrounding (outer) wall, such that it reflects the overall external profile of the handle's tubular structure. The combination of inner diameter and (outer) wall thickness may also be referred to herein as the outer diameter of handle 20.

[0050] Referring now to FIG. 6, a side profile is provided, with various relative dimensions shown to more clearly depict one exemplary embodiment of handle 20 and head 40. In this embodiment, the inner diameter (height) of handle 20 changes across the longitudinal axis from proximal end 22 (at 11/16 inches) to distal end 24 (not shown). The outer diameter is shown decreasing from proximal end 22 (at inches) to distal end 24 (at 11/16 inches). It would be understood that, for the outer diameter at distal end 24 to measure 11/16 inches, the inner diameter at distal end 24 must be less than 11/16 inches (and is thus less than the inner diameter at proximal end 22). In this embodiment, both the exterior surface and interior passage 26 contribute towards the tapered profile of handle 20. In another embodiment, the diameter of handle 20 at distal end 24 is sufficiently greater than 11/16 inches to enable the inner diameter to remain constant along its longitudinal axis.

[0051] Continuing with FIG. 6, proximal end 42 of head 40, which is coupled to distal end 24 of handle 20 (as previously described) is shown to have an outer diameter of 11/16 inches, thereby aligning with the outer diameter of distal end 24. The exterior profile of head 40 includes first longitudinal section 40a (or curved section 40a) that extends arcuately and outwardly, relative to the longitudinal axis of paintbrush 10, to transition point 48, and a second longitudinal section 40b (or linear section 40b) that extends at least substantially parallel to the longitudinal axis of paintbrush 10. From transition point 48 to distal end 44, head 40 has a larger outer diameter of approximately 1 and 3/16 inches.

[0052] Shorthand alphanumeric identifiers (ANs) are herein assigned to specific dimensions described with respect to FIG. 6, regardless of whether such ANs are currently depicted in the drawings. Each AN corresponds to a dimension previously described, primarily relating to cross-sectional heights or diameters. For example, at proximal end 22 of handle 20, the outer diameter (height) depicted as inches is designated H1, and the inner diameter (height) of 11/16 inches is designated H2. At distal end 24 of handle 20, the outer diameter (height) depicted as 11/16 inches is designated H3. Because proximal end 42 of head 40 adjoins distal end 24, the outer diameter (height) of proximal end 42 (if depicted) would also be 11/16 inches and is thus also designated H3 (not shown). At distal end 44 of head 40, the outer diameter (height) depicted as 1 and 3/16 inches is designated H4. Although FIG. 6 does not depict inner diameter values for distal ends 24 and 44, if such value were to be provided, their designations are H5 and H6, respectively.

[0053] Turning now to FIG. 7, a top plan view is provided, with various relative dimensions shown to more clearly depict another exemplary embodiment of handle 20 and head 40. In this embodiment, the overall length of paintbrush 10, measured from its proximal end 12 (e.g., proximal end 32 of endcap 30) to distal end 14 (e.g., distal end 44 of head 40), is approximately 7 and inches. The length of the handle alonefrom proximal end 22 to distal end 24is shown as approximately 5 and inches.

[0054] FIG. 7 additionally shows the width of endcap 30 at its proximal end 32 as approximately 1 and inches, which is greater than the width of tapered handle 20 at distal end 24 (although in another embodiment, the width of endcap 30 may be equal or approximate to the width of handle 20 at distal end 24). Endcap 30 is shown having a length of 1.5 inches. With respect to head 40, both inner and outer width dimensions are shown with respect to distal end 44: the inner width (e.g., width of interior cavity 46) is shown as approximately 2 and inches, while the total outer width is approximately 2.5 inches.

[0055] Shorthand alphanumeric identifiers (ANs) are herein assigned to specific dimensions described with respect to FIG. 7, regardless of whether such ANs are currently depicted in the drawings. Each AN corresponds to a dimension previously described, primarily relating to cross-sectional lengths or widths. For example, the approximate length of paintbrush 10 at 7 and inchesmeasured from proximal end 12 to distal end 14is designated L1. The approximate length of handle 20 at 5 and inches-measured from proximal end 22 to distal end 24is designated L2. The approximate length of endcap 30 at 1.5 inches-measured from proximal end 32 to distal end 34is designated L3. The outer diameter (width) of proximal end 12 (or proximal end 32) depicted as 1.25 inches is designated W1. At distal ends 14 (of paintbrush 10) and 44 (of head 40), the outer diameter (width) depicted as 2.5 inches is designated W2, and the inner diameter (width) depicted as 2 and inches is designated W3.

[0056] It will be appreciated that the specific dimensions illustrated in FIGS. 6 and 7, including lengths, widths, heights, taper angles, wall thicknesses, and shapes (e.g., head 40), are provided solely by way of non-limiting example and are not intended to define the exact scale, proportion, or geometry of any component. Variations in absolute and relative dimensions are contemplated as being within the scope of the present invention, as would be understood by those skilled in the art.

[0057] In one or more embodiments, head 40 is configured as having a larger cross-section than the currently available ferrule heads for conventional paintbrushes. In particular, the previously described cross-sectional dimensions are enlarged over those of conventional ferrule heads to facilitate greater fluid retention in the space defined by internal surfaces 46a of first longitudinal section 40a.

[0058] In one embodiment, handle 20 and head 40 are ultrasonically welded together along their shared borderi.e., distal end 24 of handle 20 and proximal end 42 of head 40. In another embodiment, handle 20 and head 40 are fused or joined by other known methods, such as, but not limited to, thermal bonding, solvent welding, or other techniques capable of permanently joining adjacent elements into a unitary structure.

[0059] In one embodiment, tubular member 20 and ferrule head 30 are of unitary construction, formed as a single, continuous component. Such unitary construction may be achieved through 3D printing (additive manufacturing), injection molding, casting, or machining, or other suitable methods known in the art, or a combination thereof.

[0060] In another embodiment, handle 20 and head 40 are separately formed components that are releasably coupled to each other. The coupling may be achieved via threaded engagement, snap-fit, or bayonet fitting, or other suitable mechanical joining techniques. The releasable configuration is useful, such as for head 40 replacement. In this embodiment, the fluid communication between handle 20 and head 40 may include a sealing member, such as an O-ring, gasket, sealant washer, or similar component, to prevent leakage and maintain hydraulic integrity.

[0061] In yet another embodiment, handle 20 and head 40 are separately formed components that are permanently coupled or fused to each other, such as by chemical bonding, mechanical coupling, or other known methods in the art.

[0062] In one or more embodiments, plug 50 is an epoxy infused wood structure that is configured to retain proximal ends of bristles 60.

[0063] In one or more embodiments, with reference to FIGS. 13A and 13B, handle 20 includes an exterior surface having a textured gripping portion or surface 21. As shown in the enlarged view of Detail A of FIG. 13A provided in FIG. 13B, gripping portion 21 features a raised helical ridge 21a that extends circumferentially around and along substantially the entire length of handle 20, providing an improved gripping feature. Helical ridge 21 may be continuous or segmented into near-continuous sections, with small spaces or gaps between adjacent sections, which may be parallel or perpendicular to the ridges, or a combination thereof. These spaces and the overall spiral-ridge configuration facilitate channeling of accumulated moisture, such as hand perspiration, away from the gripping surface, thus enhancing grip and control during use. The spiral ridges may be arranged in pairs, with interstitial grooves formed between each pair. Gripping portion 21 may be formed integrally with handle 20 or applied as a separate layer or feature and thereafter attached or affixed to the exterior of handle 20.

[0064] The previously described components may be formed of water-compatible materials, including, but not limited to, thermoplastics (e.g., polyethylene, polypropylene, PVC), metals (e.g., stainless steel, brass, aluminum), composites, wood, or other suitable materials, or combinations thereof, based on each component's respective function, as would be understood by a person having ordinary skill in the art.

[0065] In one or more embodiments, the previously described components may be formed from white ABS plastic, with nylon bristles and epoxy-infused wood plug to retain the bristles (as previously described).

[0066] In one or more embodiments, head 40 may be configured with additional features, such as crimp zones, adhesive-retaining cavities, or other geometric or structural configurations adapted to facilitate mechanical retention or adhesive bonding between bristles 60 and handle 20. In another embodiment, head 40 may take the form of a conventional metal ferrule head.

[0067] In one or more embodiments, it will be appreciated that dimensions, geometries, materials, and coupling techniques may vary between embodiments without departing from the scope of the present invention. For instance, both passage 26 and interior cavity 46 may be circular, oval, polygonal, or of any other suitable shape in cross-section, and may include uniform or varying diameters along their respective lengths. Similarly, the external profile of handle 20 may be round, oval, polygonal, or irregular, and may incorporate contours, surface features, or dimensional variations (or combinations thereof) based on ergonomic, functional or aesthetic reasons. Features described in connection with one embodiment may be combined in whole or in part with features of other embodiments, where technically feasible (or unless otherwise stated), to form additional variations that are likewise within the scope of the present invention.

[0068] As previously described, each of the above-referenced proximal ends (i.e., 22, 32 and 42) may also be referred to herein as respective first endsi.e., first end 22 of handle 20, first end 32 of endcap 30, and first end 42 of head 40, or variations thereof (e.g., first handle end 22 and first head end 42). Likewise, each of the above-referenced distal ends (i.e., 24, 34 and 44) may also be referred to herein as respective second endsi.e., second end 24 of handle 20, second end 34 of endcap 30, and second end 44 of head 40, or variations thereof (e.g., second handle end 24 and second head end 44). Additionally, passage 26 (of handle 20) may be referred to herein as first passage or first cavity and interior cavity 46 (of head 40) may be referred to herein as second passage or second cavity.

[0069] In the drawings, it will be understood that, for purposes of clarity and simplicity, a single lead line may extend from a common location to identify two or more adjacent or coextensive elements, each indicated by a different reference numeral. This occurs, for example, where two elements share a common border, occupy overlapping space, or are in immediate adjacency. In such cases, the particular reference numeral associated with the relevant structure will be used in the written description to distinguish between the elements. By way of example, a single lead line may extend from the interface between distal end 24 (of handle 20) and proximal end 42 (of head 40), or from the interface between outlet 25 and inlet 43, or from a region representing sidewalls 41 as well as first and second longitudinal sections 40a, 40b (of the head 40). This drafting convention is employed solely for visual simplicity and does not imply that the referenced elements are indistinct or interchangeable.

[0070] The following is a list of reference numerals and associated parts as used in this specification and drawings:

TABLE-US-00001 Reference Part Numeral Paintbrush 10 Proximal end (or first end) of Paintbrush 12 Distal end (or second end) of Paintbrush 14 Elongated handle (or hollow tubular shaft) 20 Gripping surface of Handle 21 Helical ridge of Gripping surface 21a Proximal end (or first end) of Handle 22 Proximal end opening (or inlet) of Handle 23 Distal end (or second end) of Handle 24 Distal end opening (or outlet) of Handle 25 Passage of Handle (or first interior cavity) 26 Female-threaded (bore) section of Handle 28 Endcap 30 Hook hole 31 Proximal end (or first end) of Endcap 32 Male-threaded section of Endcap 33 Distal end (or second end) of Endcap 34 Sealing element 35 Head 40 First longitudinal section (or curved section) of Head 40a Second longitudinal section (or linear section) of Head 40b Sidewalls of Head 41 Proximal end (or first end) of Head 42 Proximal end opening (or inlet) of Head 43 Distal end (or second end) of Head 44 Distal end opening (or outlet) of Head 45 Interior cavity of Head (or second interior cavity) 46 Internal surfaces of First longitudinal section 46a Internal surfaces of Second longitudinal section 46b Transition line or point between first and second 48 longitudinal sections of Head Flow-through plug 50 Proximal end (or first end) of Plug 52 Distal end (or second end) of Plug 54 Through holes or drainage holes 56 Bristles 60 Proximal end (or first end) of Bristles 62 Distal end (or second end) of Bristles 64

[0071] While certain embodiments have been described herein, it will be appreciated by those skilled in the art that various modifications and substitutions may be made without departing from the spirit and scope of the present invention as defined by the claims that follow.