Patent US3839830A successfully refreshed from Google Patents.
US3839830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anti-vibration work rest for grinders
Assignee: FOX GRINDERS Inc
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Filing: 1973-04-27
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Granted: 1974-10-08
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Expires: 1993-04-27
Abstract
Abstract The specification discloses a work rest for grinders constructed so as to reduce the intensity of noise generated when grinding a metal object on the grinder wheel. The work rest comprises an upper metal plate, a lower metal plate, and a relatively thin intervening sheet of energy absorbing material, all tightly secured together. A mounting spindle fits into a central hole in the lower plate and is welded thereto.
Inventors
- 👤 J Bair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:09
CPC Classifications
B; B24; B24B; B24B5/00; B24B5/35
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
76 words
A grinding wheel work rest comprising an upper plate, a lower plate, a sheet of energy absorbing material therebetween, rigid spindle means secured centrally to said lower plate by which to mount the work rest, at least one elastomeric anchor in one of said plates, and screw means threadedly engaged with said elastomeric anchor for holding said plates and sheet snugly together, the screw means is off set from a longitudinal axis of the spindle means.
Claim 2
Dependent Claim
76 words
A grinding wheel work rest comprising an upper plate, a lower plate, a sheet of energy absorbing material therebetween, rigid spindle means secured centrally to said lower plate by which to mount the work rest, at least one elastomeric anchor in one of said plates, and screw means threadedly engaged with said elastomeric anchor for holding said plates and sheet snugly together, the screw means is off set from a longitudinal axis of the spindle means.
Claim 3
Dependent Claim
16 words
A work rest according to claim 1, wherein said upper and lower plates are of steel.
Claim 4
Dependent Claim
16 words
A work rest according to claim 1, wherein said sheet of energy-absorbing material comprises elastomeric material.
Claim 5
Dependent Claim
15 words
A work rest according to claim 1 wherein said sheet of energy-absorbing material comprises cork.
Claim 6
Dependent Claim
51 words
A work rest according to claim 1, wherein said upper plate comprises a steel plate of uniform thickness, said lower plate comprises a steel plate of uniform thickness substantially less than that of the upper plate, and said intervening sheet comprises a relatively thin sheet of elastomeric material of uniform thickness.
Claim 7
Dependent Claim
97 words
A grinding wheel work rest comprising: a. an upper plate; b. a lower plate with a central circular hole therethrough; c. a sheet of energy absorbing material therebetween; d. screw means for holding the plates and sheet snugly together; and e. a spindle secured centrally to the lower plate by which to mount the work rest, the spindle is of circular cross-section snugly fitting the hole but out of contact with the intervening sheet, the spindle is secured to the lower plate by a circular weld inside the hole and by a circular weld outside the hole.
Claim 8
Dependent Claim
97 words
A grinding wheel work rest comprising: a. an upper plate; b. a lower plate with a central circular hole therethrough; c. a sheet of energy absorbing material therebetween; d. screw means for holding the plates and sheet snugly together; and e. a spindle secured centrally to the lower plate by which to mount the work rest, the spindle is of circular cross-section snugly fitting the hole but out of contact with the intervening sheet, the spindle is secured to the lower plate by a circular weld inside the hole and by a circular weld outside the hole.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-07 | 1978-04-08 | 1978-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-07 | 1982-04-08 | 1982-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-07 | 1986-04-08 | 1986-10-08 | $7700.00 | Window Closed / Lapsed |