Patent US4291507A successfully refreshed from Google Patents.
US4291507A
Expired / Lapsed
US
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High speed grinding wheel for glass
Assignee: Individual
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Filing: 1979-11-28
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Granted: 1981-09-29
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Expires: 1999-11-28
Abstract
Abstract A resilient disc shaped wheel and supported abrasive belt for grinding glass. A central bore in the wheel provides for mounting to a rotating drive shaft driven by a motor. Circumferentially spaced radially extending slits are disposed incrementally around the entire circumference of the wheel, defining flexible teeth therebetween. The slits are cut only a portion of the way through the wheel leaving a continuous membrane of resilient material tending to hold the teeth in position upon rotation. An abrasive belt is positioned around the outer perimeter of the wheel, and held in place by the centrifugal forces imparted to the teeth.
Inventors
- 👤 John J. Littlehorn, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:44
CPC Classifications
B; B24; B24D; B24D9/00; B24D9/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
A high speed grinding wheel having a narrow continuous abrasive belt for grinding glass and like brittle materials, comprising a narrow, flat, disc-shaped body of flexible, resilient material having a hardness factor of between about 30 and about 100 durometer, said body defining parallel, spaced, opposed, circular faces joined at their circumferences by a narrow, cylindrical, peripheral surface, a plurality of relatively short, thin, radial slits equidistantly defined in said body around the circumference thereof and opening into said peripheral surface thereof and into one of said faces, said slits being spaced apart a distance approximately equal to the radial depth thereof and having a depth equal to about one-sixth of the radius of the wheel, the other of said faces being unbroken by said slits, said abrasive belt being snugly supported on and completely surrounding said peripheral cylindrical surface during grinding use thereof.
Claim 2
Dependent Claim
144 words
A high speed grinding wheel having a narrow continuous abrasive belt for grinding glass and like brittle materials, comprising a narrow, flat, disc-shaped body of flexible, resilient material having a hardness factor of between about 30 and about 100 durometer, said body defining parallel, spaced, opposed, circular faces joined at their circumferences by a narrow, cylindrical, peripheral surface, a plurality of relatively short, thin, radial slits equidistantly defined in said body around the circumference thereof and opening into said peripheral surface thereof and into one of said faces, said slits being spaced apart a distance approximately equal to the radial depth thereof and having a depth equal to about one-sixth of the radius of the wheel, the other of said faces being unbroken by said slits, said abrasive belt being snugly supported on and completely surrounding said peripheral cylindrical surface during grinding use thereof.
References Cited (Backward Citations)
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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) | 1984-09-28 | 1985-03-30 | 1985-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-28 | 1989-03-30 | 1989-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-28 | 1993-03-30 | 1993-09-29 | $7700.00 | Window Closed / Lapsed |