Patent US3129535A successfully refreshed from Google Patents.
US3129535A
Expired / Lapsed
US
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Method and apparatus for grinding rails
Assignee: Chemetron Corp
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Filing: 1962-04-25
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Granted: 1964-04-21
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Expires: 1982-04-25
Abstract
No abstract record available.
Inventors
- 👤 Robert E Slattery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:45
CPC Classifications
B; B24; B24B; B24B19/00; B24B19/004; E; E01; E01B; E01B31/00; E01B31/02; E01B31/12; E01B31/17; E01B31/175
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
APPARATUS FOR CLEANING SPACED APART PORTIONS LOCATED NEAR ITS OPPOSED ENDS OF A RAIL SECTION MOVING ALONG ITS LONGITUDINAL AXIS, SAID APPARATUS COMPRISING A FIXEDLY POSITIONED GRINDING DEVICE, CONTROL MEANS FOR RENDERING SAID GRINDING DEVICE ALTERNATELY EFFECTIVE AND INEFFECTIVE TO GRIND THE RAIL, MEANS ACTUATED BY MOVEMENT OF THE LEADING END OF SAID RAIL SECTION TO THE GRINDING DEVICE FOR ACTUATING THE CONTROL MEANS SO THAT THE GRINDING DEVICE IS RENDERED EFFECTIVE FOR A PREDETERMINED PERIOD TO GRIND A PORTION OF THE RAIL SECTION LOCATED NEAR ITS LEADING EDGE, SAID PREDETERMINED PERIOD BEING MUCH SHORTER THAN THE TIME REQUIRED FOR THE RAIL SECTION TO MOVE PAST THE GRINDING DEVICE, AND MEANS ACTUATED BY MOVEMENT OF THE TRAILLING END OF THE RAIL SECTION TO THE GRINDING DEVICE FOR ACTUATING THE CONTROL MEANS IN ORDER TO RENDER THE GRINDING DEVICE EFFECTIVE TO GRIND A PORTION OF THE RAIL SECTION NEAR ITS TRAILING END.
Claim 2
Dependent Claim
151 words
APPARATUS FOR CLEANING SPACED APART PORTIONS LOCATED NEAR ITS OPPOSED ENDS OF A RAIL SECTION MOVING ALONG ITS LONGITUDINAL AXIS, SAID APPARATUS COMPRISING A FIXEDLY POSITIONED GRINDING DEVICE, CONTROL MEANS FOR RENDERING SAID GRINDING DEVICE ALTERNATELY EFFECTIVE AND INEFFECTIVE TO GRIND THE RAIL, MEANS ACTUATED BY MOVEMENT OF THE LEADING END OF SAID RAIL SECTION TO THE GRINDING DEVICE FOR ACTUATING THE CONTROL MEANS SO THAT THE GRINDING DEVICE IS RENDERED EFFECTIVE FOR A PREDETERMINED PERIOD TO GRIND A PORTION OF THE RAIL SECTION LOCATED NEAR ITS LEADING EDGE, SAID PREDETERMINED PERIOD BEING MUCH SHORTER THAN THE TIME REQUIRED FOR THE RAIL SECTION TO MOVE PAST THE GRINDING DEVICE, AND MEANS ACTUATED BY MOVEMENT OF THE TRAILLING END OF THE RAIL SECTION TO THE GRINDING DEVICE FOR ACTUATING THE CONTROL MEANS IN ORDER TO RENDER THE GRINDING DEVICE EFFECTIVE TO GRIND A PORTION OF THE RAIL SECTION NEAR ITS TRAILING END.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-21 | 1967-10-21 | 1968-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-21 | 1971-10-21 | 1972-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-21 | 1975-10-21 | 1976-04-21 | $7700.00 | Window Closed / Lapsed |