Abstract
An apparatus for abrading surfaces has a first manifold mounted proximate one end of a shaft, and a second manifold mounted distal to one end of the shaft, said first and second manifolds being constructed to receive and distribute a fluid under positive pressure and vacuum pressure, the shaft being connected to the first and second manifolds to support the manifolds and the shaft includes fluid pathways to conduct air and vacuum flows of the fluid between the manifolds, and an end effector for treating surfaces.
Claims
1. Apparatus for abrading surfaces comprising a first manifold mounted proximate one end of a shaft, and a second manifold mounted distal to said one end of the shaft, wherein said first and second manifolds receive and distribute a fluid under positive pressure and vacuum pressure, and said shaft is connected to said first and second manifolds and includes fluid pathways to conduct air and vacuum flows of said fluid between said manifolds, and an end effector for treating surfaces.
2. Apparatus according to claim 1 wherein said first manifold comprises a connector for receiving a fluid under pressure, an outlet for providing said fluid to said end effector, and at least one outlet for providing said fluid to one or more power control switches.
3. Apparatus according to claim 2 wherein said first manifold comprises a power control lever that adjusts the fluid directed to said end effector.
4. Apparatus according to claim 2 further comprising a fluid operated conveyor and said first manifold includes an outlet for providing said fluid to an inlet of said fluid operated conveyor.
5. Apparatus according to claim 4 wherein said second manifold includes an inlet for receiving said fluid from said first manifold and distributing said fluid to an outlet for supplying said fluid to said end effector.
6. Apparatus according to claim 4 wherein said fluid operated conveyor is mounted to said second manifold.
7. Apparatus wherein said shaft is extruded aluminum.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
[0013] FIG. 1 is a perspective view of a surface abrading machine in accordance with the invention.
[0014] FIG. 2 is a view of an operator's handle portion of a surface abrading machine in accordance with the invention.
[0015] FIG. 3 is a view of a second embodiment of an operator's handle portion of a surface abrading machine in accordance with the invention.
[0016] FIG. 4 is a view of a third embodiment of an operator's handle portion of a surface abrading machine in accordance with the invention.
[0017] FIG. 5 shows a proximal manifold of a surface abrading machine in accordance with the invention.
[0018] FIG. 6a shows a distal manifold of a surface abrading machine in accordance with the invention.
[0019] FIG. 6b shows a second embodiment of a distal manifold of a surface abrading machine in accordance with the invention.
[0020] FIG. 7 illustrates the paths provided by the shaft portion of the invention.
[0021] FIG. 8a is a side view illustrating the air power path of a surface abrading machine in accordance with the invention.
[0022] FIG. 8b is a side view illustrating the vacuum path of a surface abrading machine in accordance with the invention.
[0023] FIG. 9a is a side view of the air power path of a second embodiment of a surface abrading machine in accordance with the invention
[0024] FIG. 9b is a side view of the vacuum path of the second embodiment of a surface abrading machine in accordance with the invention.
[0025] FIG. 10 is a perspective of an embodiment of the invention used for close surfaces.
DETAILED DESCRIPTION
[0026] With reference to FIG. 1, a surface abrading machine 2 in accordance with the invention generally comprises an operator's handle 4, a shaft 6, a vibration absorber 8, and an end effector 10. The shaft 6 as well as additional parts, which are described below, are preferably made of light-weight materials, such as extruded aluminum to reduce the overall weight of the machine. The surface abrading machine preferably uses pneumatically driven end effectors 10 to reduce flammability concerns, but other types of end effectors are within the contemplation of the invention. While a typical pneumatic fluid used in the machine to be described is air, other gasses may also be used. Thus, the reference to air in this application should be construed broadly to include other gasses as well.
[0027] Also shown in FIG. 1 is a lifting handle 12 and an optional dust bag 14.
[0028] FIG. 2 illustrates one embodiment of a handle portion of the machine of FIG. 1. It will be appreciated that the machine of the invention includes a proximal manifold 16, a central shaft portion 18 and a distal manifold to be described with reference to FIG. 5. As shown in FIG. 2, a handle 20 is attached at an upper part of the shaft 6, and in this embodiment to the top of the proximal manifold 16. A vacuum bag connector 22 is provided on one side of the proximal manifold 16 and a throttle control lever 24 is located on an opposite side. A sander on/off lever 26 is mounted to the handle 20 for easy access by the operator to activate/deactivate the end effector as will be described below. A power control toggle switch 28, is centrally mounted on the top of the proximal manifold. The sander on/off lever operates a valve (not shown) that receives air from the toggle switch to control the flow of air to the end effector through a pneumatic valve operated by the power control lever valve.
[0029] FIG. 3 illustrates an embodiment of the handle portion wherein an additional controller 32, similar to the above described on/off lever, but instead operated by buttons, is provided to provide air to paths 34 and 36 to control alternative functions of the end effector. Such alternate functions might be, by way of example, the raising or lowering of a scaler or the tilting of a sander. FIG. 4 illustrates a further embodiment wherein an additional controller is in the form of a lever 38 for controlling the alternative functions through air path 40.
[0030] With reference to FIGS. 5, 6a, 6b, and 7, FIG. 5 illustrates the proximal manifold in more detail. Air under pressure for operation of the machine enters the proximal manifold through a pneumatic connector 42. This air entering the connector is separated into three paths within the proximal manifold 16, one for powering the end effector, another for operating the power and auxiliary controls through the toggle switch 28, and a third as the high pressure inlet for the vacuum system. The air for operating power and auxiliary control valves (e.g., the valves, which are not shown, controlled by the lever 38 and pressure source connector 42) is in turn split into three parts and passed through valves, not shown, and then connected, respectively, to tubular connectors 44a, 44b, 44c to provide control air to valves in the distal manifold, as will be described below.
[0031] Air for powering an end effector is directed through the throttle control 24 to opening 46 for connection to an opening in the distal manifold as will be described below.
[0032] Air for operating a vacuum system is directed to opening 48 for connection to the inlet of an air-operated conveyor to be described below.
[0033] Vacuum opening 49 receives the upper end of the air-operated conveyor 64 and is connected through an internal channel (not shown) to the dust bag 14 shown in FIG. 1.
[0034] FIGS. 6a and 6b show the distal manifold 50. FIG. 6a shows the configuration of the distal manifold when the auxiliary vacuum system for collecting dust and debris is not needed. In that case, ports 68 and 49 can be connected, for example, by a tube. A bracket 52 for supporting handle 12 extends outward from the manifold itself. Air for powering the end effector is supplied to opening 54, which is connected to outlet 46 of the proximal manifold by tubing (not shown) extending along a longitudinal cavity of the central portion 18 of the shaft 6. Tube connectors 56 receive tubes (not shown) connected to respective connectors 44a and 44b to pass air to auxiliary control valves or actuators (not shown) at the end effector.
[0035] Tube connector 58 receives a tube (not shown) also in the cavity inside the central part 18 of the shaft 6 that is connected to outlet 44a for receiving air from the valve operated by lever 26 and directing it to an valve (not shown) inside the distal manifold that controls passage of air from opening 54 to an end effector.
[0036] FIG. 6b shows the configuration of the distal manifold when a vacuum is to be used. Parts similar to those of FIG. 6a have been given the same reference numerals. Tube connector 60 receives air to power an air operated conveyer by connecting through an internal channel and valve (not shown) inside the vacuum manifold 66 to the pressure inlet of an air operated conveyor, or integrated vacuum, 64. The vacuum inlet of the air-operated vacuum 64 is connected to vacuum intake 68 in the distal manifold 50 (see FIG. 6a). Tube connector 62 receives a tube connected to outlet 44a in the proximal manifold to control a valve (not shown) inside the vacuum manifold 66 to direct air from inlet 60 to the pressure inlet (not shown) of the air-operated conveyor 64.
[0037] FIG. 7 illustrates the connections described above.
[0038] FIG. 8a illustrates the air power path 70 from the pressure source connector 42 and power control throttle 24 in the proximal manifold 16 to the distal manifold 50, through the bracket 52 and thence to the end effector 10. In the case of the machine shown in FIG. 8a, the end effector comprises two sanders, and the terminal part of the air power path has been split to provide an inlet to each of the sanders.
[0039] FIG. 8b illustrates the vacuum path 72 for the embodiment using the vacuum option. The path connects to a vacuum shroud 74 surrounding the end effector.
[0040] FIGS. 9a and 9b illustrate the air and vacuum paths for an embodiment where the end effector is a scaler.
[0041] FIG. 10 illustrates an embodiment designed for use when the surface to be abraded is relatively close to the operator. Thus, the central shaft 18 is shorter than in embodiments designed to abrade a surface on which the operator will be standing. A handlebar mounting bracket 76 can provide for a different angle between the handlebar 20 and the central shaft 18, while an end effector mounting bracket 78 can provide for the end effector to extend at a more effective and convenient angle with respect to the central shaft 18.
[0042] Modifications within the scope of the appended claims will be apparent to those of skill in the art.
