POWER-SANDING DEVICE

• US 3,597,883 A
• Filed: 02/26/1969
• Issued: 08/10/1971
• Est. Priority Date: 02/26/1969
• Status: Expired due to Term

• Current Assignee: Robert L. Choplin, Walter D. Hodge
• Original Assignee: Robert L. Choplin, Walter D. Hodge
• Inventors: Choplin, Robert L., Hodge, Walter D.
• Application Number:
  US04/802,361
• Time in Patent Office: 895 Days
• US Class Current: 451/358
• CPC Class Codes: B24B 23/02 with rotating grinding tools; Accessories therefor

Abstract

A power-sanding device has a housing rotatably supporting an elongate drive shaft extending therefrom and rotatably supporting driven shaft portions extending from opposed ends and having a sanding drum mounted on the extending ends thereof. Power means operatively engages the drive shaft to rotate the sanding drums through intermeshing gears on the drive and driven shafts. An elongate arm extends from the housing and has a gripping portion on one end thereof and a guard member mounted on the housing between the gripping portion and a portion of the sanding drums.

Claims

1. A power-sanding device comprising:

a. a housing having an elongate drive shaft rotatably supported therein;

b. an elongate driven shaft rotatably supported in said housing, said driven shaft having opposite ends thereof extending from said housing transversely to said drive shaft;

c. said housing including a pair of elongate end sections each having a bore through one end thereof, said bores being alignable to rotatably support said driven shaft, said end sections each having mating means on the other ends thereof for aligning said bores;

d. means for securing said end sections together with said bores aligned;

e. a threaded bore in said housing disposed transverse to said driven shaft;

f. an elongate drive shaft guide member having one end threaded for moUnting in said threaded bore, said guide member having said drive shaft rotatably supported therein;

g. an elongate arm extending from said housing;

h. a gripping portion on one end of said arm for guiding the sanding device;

i. gears within said housing operatively connecting said drive and driven shafts;

j. an elongate sanding drum mounted on each end of said drive shaft;

k. power means operatively connected to said drive shaft to rotate same and said sanding drums.

2. The power sanding device as set forth in claim 1 including:

a. a split sleeve mounted on said guide member and having said arm extending therefrom; and

b. a split guard member on said split sleeve, said guard member being positioned between said gripping portion and a portion of each of said sanding drums.

3. A power-sanding device comprising:

a. an elongate housing having a pair of elongate end sections each having a bore through one end thereof, said end sections each having means on the other ends thereof for aligning said bores, said housing having a threaded bore disposed transverse to said aligned bores;

b. an elongate guide member having one end threaded for mounting in said threaded bore for rotatably supporting an elongate drive shaft;

c. an elongate driven shaft rotatably supported in said aligned bores and having opposite ends thereof extending from said housing transversely to said drive shaft;

d. first and second intermeshing bevel gears within said housing, said first bevel gear being on one end of said drive shaft and said second bevel gear being on said driven shaft intermediate the ends thereof;

e. an elongate sanding drum mounted on each end of said driven shaft, said drum having an abrasive exterior surface;

f. power means operatively connected to the other end of said drive shaft to rotate same and said sanding drums; and

g. means for guiding said sanding drums.

4. The power-sanding device as set forth in claim 3 wherein said sanding drums each include:

a. a core member having a generally cylindrical exterior surface;

b. a resilient rim mounted on said cylindrical exterior surface, said rim having a plurality of circumferentially spaced cuts each extending longitudinally along the periphery thereof, said cuts each being inclined outwardly toward the direction of rotation relative to a radial plane through their respective root whereby operational rotation of said rim increases the diameter thereof and twisting the periphery of said resilient rim while at rest toward the direction of operational rotation reduces the diameter thereof; and

c. an elongate generally cylindrical sleeve removably mounted on said resilient rim, said sleeve having said abrasive exterior surface thereon.

5. A portable power-sanding device comprising:

a. a housing having a pair of elongate end sections said end sections each having a bore therein aligned with the other;

b. a driven shaft rotatably supported in said bores and having an end extending from a housing end section;

c. a drive shaft;

d. an elongate drive shaft guide member removably supported by said housing, said guide member having a bore transversely of the driven shaft, said drive shaft being rotatably supported in said bore of said guide member and having one end extending therefrom;

e. a power tool including a drill chuck attached to said one end of the drive shaft and operative to rotate same;

f. gears within said housing operatively connecting said drive and driven shafts;

g. an elongate sanding drum mounted on said extending end of the driven shaft and rotated in response to rotation of the drive shaft, said sanding drum having a resilient rim portion;

h. a sanding sleeve having an abrasive exterior surface removably mounted on said resilient rim and frictionally retained thereon;

i. an arm secured relative to the housing and extending therefrom substantially in a plane through the drive shaft and traNsversely of the driven shaft;

j. a gripping handle on said arm for facilitating guiding of the sanding device.

6. A portable power-sanding device as set forth in claim 5 including:

a. said gripping handle extending laterally of said arm substantially parallel to the driven shaft and spaced from the sanding drum;

b. a guard member fixed on said arm and positioned between the gripping handle and the sanding drum to protect an operator'"'"''"'"'s hand from engagement with the sanding drum.