Abstract
A mounting assembly which may be releasably mounted on a standard mounting rail, where said rail includes a base plate and evenly spaced upwardly extending rail projections with evenly spaced transverse slots there between, each rail projection having an angulated upper side surface and an angulated lower side surface, said mounting assembly comprising: a first rail engaging surface and a second rail engaging surface, said first rail engaging surface and said second rail engaging surface facing said angulated lower side surface, when mounted on the rail, a third rail engaging surface and a fourth rail engaging surface, said third rail engaging surface and said fourth rail engaging surface facing said angulated upper side surface, when mounted on the rail, wherein at least said third rail engaging surface and said fourth rail engaging surface are formed with alternating flat surfaces and indentation surfaces, each indentation surface having a width extending a width of each of said transverse slots, and each flat surface having a width smaller than a width of each rail projection.
Claims
1. A mounting assembly which may be releasably mounted on a standard mounting rail, where said rail includes a base plate and evenly spaced upwardly extending rail projections with evenly spaced transverse slots there between, each rail projection having an angulated upper side surface and an angulated lower side surface, said mounting assembly comprising: a rib arranged to be received in one of said transverse slots to fix said mounting assembly in a longitudinal direction of said standard mounting rail, a first rail engaging surface and a second rail engaging surface, said first rail engaging surface and said second rail engaging surface facing said angulated lower side surface, when mounted on the rail, a third rail engaging surface and a fourth rail engaging surface, said third rail engaging surface and said fourth rail engaging surface facing said angulated upper side surface, when mounted on the rail, wherein at least said third rail engaging surface and said fourth rail engaging surface are formed with alternating flat surfaces and indentation surfaces, each indentation surface having a width extending a width of each of said transverse slots, and each flat surface having a width smaller than a width of each rail projection, and wherein said flat surfaces face said angulated upper side surfaces of the standard mounting rail while said indentation surfaces face said transverse slots there between.
2. A mounting assembly as claimed in claim 1, wherein said first rail engaging surface and said second rail engaging surface are formed with alternating flat surfaces and indentation surfaces, each indentation surface having a width extending a width of each of said transverse slots, and each flat surface having a width smaller than a width of each rail projection.
3. A mounting assembly as claimed in claim 1, wherein said mounting assembly comprises a fifth rail engaging surface, said fifth rail engaging surface facing a flat top surface mounting surface of said standard mounting rail, when mounted on the rail, and wherein said fifth rail engaging surface is formed with alternating flat surfaces and indentation surfaces, each indentation surface having a width extending a width of each of said transverse slots, and each flat surface having a width smaller than a width of each rail projection.
4. A mounting assembly as claimed in claim 1, wherein said indentation surfaces have a width extending a width of each of said transverse slots and being at least 6 mm.
5. A mounting assembly as claimed in claim 1, wherein said indentation surfaces have a depth of about 1.5 mm.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
(1) In order that the manner in which the above recited and other advantages and objects of the invention are obtained will be readily understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
(2) Understanding that these drawings depict only typical embodiments of the invention and are not therefore to be considered to be limiting of its scope, the invention will be described and explained with additional specificity and detail through the use of the accompanying drawings in which:
(3) FIG. 1 is a schematic perspective view from below of one embodiment of a partly cut mounting assembly in accordance with the invention,
(4) FIG. 2 is a schematic perspective view of a section of the mounting assembly of FIG. 1,
(5) FIG. 3 is side view of the section in FIG. 2,
(6) FIG. 4 is a schematic perspective view of a standard rail for accessories,
(7) FIG. 5 is a top view of a standard rail for accessories,
(8) FIG. 6 is a cross-section view through line VI-VI of FIG. 5,
(9) FIG. 7 is a side view of the mounting assembly of FIG. 1 mounted on a rail in an upside down position, and
(10) FIG. 8 is a schematic cross-section of a part of the mounting assembly of FIG. 4 as indicated by a circle.
DETAILED DESCRIPTION
(11) In FIG. 1 a mounting assembly 10 is shown upside down and cut open to show surfaces that will face a rail, c.f. FIG. 4 and FIG. 6. A central rib 12 will be lowered into and received in a transverse slot of the rail and fix the mounting assembly 10 in the longitudinal direction of the rail when the mounting assembly is attached to a rail. As shown in FIG. 1 an opening is formed in side walls of a central section 14 of the mounting assembly 10 around the central rib 12. As a result there will be no surfaces of the mounting assembly 10 abutting the rail in this area.
(12) Side sections 16 on either side of said central section 14 are formed with alternating flat surfaces 18 and indentation surfaces 20. The flat surfaces 18 will face evenly spaced upwardly extending rail projections of the rail while the indentation surfaces 20 will face evenly spaced transverse slots there between. End sections of the indentation surfaces 20 extend partly over the upwardly extending rail projections, c.f. FIG. 8, when mounted on a rail. The mounting assembly 10 comprises also clamping screws (not shown).
(13) The embodiment of the mounting assembly 10 shown in FIG. 1 is designed to hold a sight. Other embodiments of the mounting assembly 10 are designed for other accessories such as gun slings, rifle scopes, rifle laser target illuminators, flashlights, spent shell collectors, and the like. The mounting assembly 10 comprises a base plate 22 a front mounting ring half 24 and a rear mounting ring half 26. The mounting assembly 10 also comprises a further front mounting ring half (not shown) and a further rear mounting ring half (not shown) interacting with the front mounting ring half 24 and the rear mounting ring half 26 to form there between an open circular space that will receive a sight (not shown).
(14) FIG. 2 is a cut off section of the front mounting ring half showing a clamp 27 used for attaching the mounting assembly 10 to a rail. In various embodiments a quick clamping assembly that provides adjustable spring tension to control the clamping force exerted against the rail replaces the clamp. Two clamping screws 29 are used to maintain the clamp 27 in position. Said side sections 16 comprise a first rail-engaging surface 17 and a second rail-engaging surface 19, and also third and fourth rail-engaging surfaces, c.f FIG. 3. In the embodiment shown in FIG. 2 all rail-engaging surfaces are formed with alternating flat surfaces 18 and indentation surfaces 20.
(15) FIG. 3 further illustrates that a mounting assembly 10 in accordance with the invention has five surfaces that can be in engagement with a standard rail as shown in FIG. 4-FIG. 6. Depending on expected forces acting on the mounting assembly 10 and other conditions the mounting assembly 10 is designed so that three or more of these surfaces are actually are engaging the rail. First rail-engaging surface 17 and second rail-engaging surface 19 can engage an angulated lower mounting surface 40 of said rail 28. A third rail-engaging surface 33 and fourth rail-engaging surface 35 are designed to engage oppositely angulated upper mounting surfaces 38. It should be noted that angulated lower mounting surface 40 is flat in accordance with present standards. A fifth rail-engaging surface 37 will face a flat upper side of rail projections 32. At least third rail-engaging surface 33 and fourth rail-engaging surface 35 are formed with alternating flat surfaces 18 and indentation surfaces 20.
(16) FIG. 4-FIG. 6 show the standard rail 28. It is formed with a rectangular base plate 30 and a number of evenly spaced upwardly extending rail projections 32 with evenly spaced transverse slots 34 there between to provide for selective location of an accessory. Each of the rail projections is formed with flat top surface mounting surface 36 and opposite transverse edges that are beveled to form a “dove tail” cross sectional profile with oppositely angulated upper mounting surfaces 38, and oppositely angulated lower mounting surfaces 40. The flat top surface mounting surface 36 will face and in embodiments engage said fifth rail-engaging surface 37. Both angulated upper mounting surfaces and angulated lower mounting surfaces and are oriented at 45° angles with respect to the horizontal plane of top surface mounting surface 36. The mounting projections of a STANAG 4694 standard rail has a width w=21.2 mm. The distance between centers of transverse slots is c=10 mm, and the width of the slots s=5.35 mm.
(17) In FIG. 7 a mounting assembly 10 is shown in engagement with a standard rail 28. Side sections 16 on either side of said central section 14 are formed with alternating flat surfaces 18 and indentation surfaces 20. The flat surfaces 18 will face evenly spaced and upwardly extending rail projections 32 of the rail while the indentation surfaces 20 will face evenly spaced transverse slots 34 there between. End sections of the indentation surfaces 20 extend over the upwardly extending rail projections, c.f. FIG. 8.
(18) FIG. 8 is an enlarged part corresponding to circle 42 of mounting assembly 10 and rail 28 shown in FIG. 7. The positions of mounting assembly 10 and rail 28 shown in FIG. 8 correspond to a position where the mounting assembly 10 is close to a final position abutting rail 28. In accordance with the invention the mounting assembly 10 is formed with alternating flat surfaces 18 and indentation surfaces 20. The flat surfaces 18 will face evenly spaced upwardly extending rail projections 32 of rail 28 while the indentation surfaces 20 will face evenly spaced transverse slots 34 there between. The area corresponding to the indentation surfaces normally will not contact angulated upper mounting surfaces 38 of the rail because the indentation surfaces 20 will be opposite transverse slots 34. As a result the forming of indentations will not decrease any function of the mounting assembly.
(19) As shown in circles with dashed lines 44 of FIG. 8 end sections of the indentation surfaces 20 extend partly over the upwardly extending rail projections 32. Each indentation surface 20 has a width b. Width b is larger than width s of the slots in the rail and is at least about 6 mm. In various embodiments width b is between 5.95 mm and 7.15. As a result only a central section having the length m of flat surfaces 18 will actually engage corresponding angulated upper mounting surfaces 38 of rail 28. The end sections of indentation surfaces 20 have a length e.
(20) Length m is a substantial part of width of rail projections. In various embodiments length m is between 3 mm and 4 mm and approximately 3.5 mm. Length e is between 0.3 mm and 0.9 mm. Length e can be different at different sides of an indentation surface. The indentation surfaces 20 have a width b and a depth or indentation d that is sufficient to receive chips or burrs 46. A suitable depth d at deepest position is about 1.5 mm. The dimensions of the indentations may depend on materials used and expected external conditions.
(21) While certain illustrative embodiments of the invention have been described in particularity, it will be understood that various other modifications will be readily apparent to those skilled in the art without departing from the scope and spirit of the invention. Accordingly, it is not intended that the scope of the claims appended hereto be limited to the description set forth herein but rather that the claims be construed as encompassing all equivalents of the present invention which are apparent to those skilled in the art to which the invention pertains.
