Abrading – Frame or mount – Portable abrader
Reexamination Certificate
1998-08-21
2001-02-20
Eley, Timothy V. (Department: 3723)
Abrading
Frame or mount
Portable abrader
C451S359000, C451S366000
Reexamination Certificate
active
06190245
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to hand manipulated, pneumatically powered sanders.
In typical commercially available, pneumatically operated sanders, an air operated motor is arranged within a manually manipulated housing and connected by a drive shaft to a sanding pad via an eccentric drive.
In another construction, a sander is provided with an air turbine associated with a sanding pad supporting plate, and coupled to a manually manipulated housing by a plurality of resiliently deformable columns.
SUMMARY OF THE INVENTION
The present invention is directed towards an improved hand operated sander.
In accordance with a preferred form of the present invention, a sander is provided with a hand grip portion having a pressurized fluid supply inlet and fluid discharge; a base portion for mounting a sanding pad and having a chamber, a fluid inlet for directing fluid into the chamber and a fluid outlet for discharging fluid from chamber; a resiliently deformable sleeve having an annular mounting rim for supporting the base portion to depend from the hand grip portion and defining a conduit for connecting the fluid outlet to the fluid discharge; a fluid operated rotor or turbine wheel rotatably supported within the chamber and mounting an eccentrically located weight; a flexible conduit for connecting the fluid supply inlet to the fluid inlet of the chamber; and a clamping plate for releasably clamping the mounting rim of the sleeve to the base portion.
The base portion of the sander houses a rotor located remotely off that portion of the sander intended to be gripped by a user and the sleeve portion serves to isolate the latter from the vibrations imparted to a sanding pad by operation of the rotor and define an exhaust path for fluid discharged from the turbine.
The rotor is supported by a hollow mounting shaft, which allows the sander to be converted into a wet sander or to provide for a sanding dust exhaust system having a suction inlet located centrally of the sanding pad.
REFERENCES:
patent: 2873561 (1959-02-01), Levine
patent: 4052824 (1977-10-01), Hutchins
patent: 4071981 (1978-02-01), Champayne
patent: 4102084 (1978-07-01), Bloomquist
patent: 4175359 (1979-11-01), Teague, Jr. et al.
patent: 4592170 (1986-06-01), Hutchins et al.
patent: 4624078 (1986-11-01), Van Rijen et al.
patent: 4839995 (1989-06-01), Hutchins
patent: 5679066 (1997-10-01), Butz et al.
patent: 5885146 (1999-03-01), Cockburn
patent: 5919085 (1999-07-01), Izumisawa
Nitto Kohki Co., Ltd.—sales literature—Model FS-100C/Free Sander (Heavy Pneumatic Sander).
Hutchins Mfg. Co.—sales literature—Model 7044/Water Bug II Wet Sander.
Kovax Corp./ Eagle Abrasives, Inc.—sales literature—Model 873-WL/Orbital Wet Sander.
Baran David E.
Heidelberger Richard A.
Berry Jr. Willie
Dynabrade, Inc
Eley Timothy V.
Simpson, Simpson & Snyder, L.L.P.
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