Patent US3153974A successfully refreshed from Google Patents.
US3153974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and device for indicating a predetermined pressure exerted by a fastener
Assignee: AT&T Inc
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Filing: 1961-04-26
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Granted: 1964-10-27
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Expires: 1981-04-26
Abstract
No abstract record available.
Inventors
- 👤 Maurice D Canning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:21
CPC Classifications
F; F16; F16B; F16B31/00; F16B31/02; F16B31/028
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
162 words
A DEVICE FOR AUTOMATICALLY INDICATING THE DEGREE OF TENSIONING OF AN ELONGATED FASTENER, WHICH COMPRISES: A RESILIENT WASHER ARRANGED ABOUT THE SHANK OF THE FASTENER AND HAVING A FLAT SURFACE CIRCUMFERENTIALLY CONTINUOUS THEREAROUND, THE CONTINUOUS SURFACE BEING PROVIDED WITH A MARKING THEREON; AND RELATIVELY RIGID MEMBERS FREELY ABUTTING OPPOSITE SIDES OF SAID WASHER WHILE LEAVING THE PERIPHERY OF THE WASHER UNCONFINED FOR COMPRESSING SAID WASHER THEREBETWEEN AS THE FASTENER IS TIGHTENED TO RADIALLY EXPAND AND MOVE THE SURFACES OF THE WASHER ALONG THE ABUTTING SURFACES OF SAID RIGID MEMBERS, THE ONE OF SAID MEMBERS ADJACENT TO THE MARKED SURFACE OF SAID WASHER HAVING A PERIPHERAL EDGE EXTENDING RADIALLY BEYOND THE MARKING, SAID RIGID MEMBERS BEING RELATED TO THE FASTENER SHANK TO INSURE RADIAL DISPLACEMENT OF THE RESILIENT WASHER, WHEREBY RADIAL DISPLACEMENT OF THE MARKING PAST SAID PERIPHERAL EDGE MAY BE DETECTED, SAID MARKING ON SAID WASHER BEING DISPLACED PAST SAID PERIPHERAL EDGE WHEN THE FASTENER HAS BEEN TIGHTENED TO A PRESELECTED PRESSURE.
Claim 2
Independent Claim
162 words
A DEVICE FOR AUTOMATICALLY INDICATING THE DEGREE OF TENSIONING OF AN ELONGATED FASTENER, WHICH COMPRISES: A RESILIENT WASHER ARRANGED ABOUT THE SHANK OF THE FASTENER AND HAVING A FLAT SURFACE CIRCUMFERENTIALLY CONTINUOUS THEREAROUND, THE CONTINUOUS SURFACE BEING PROVIDED WITH A MARKING THEREON; AND RELATIVELY RIGID MEMBERS FREELY ABUTTING OPPOSITE SIDES OF SAID WASHER WHILE LEAVING THE PERIPHERY OF THE WASHER UNCONFINED FOR COMPRESSING SAID WASHER THEREBETWEEN AS THE FASTENER IS TIGHTENED TO RADIALLY EXPAND AND MOVE THE SURFACES OF THE WASHER ALONG THE ABUTTING SURFACES OF SAID RIGID MEMBERS, THE ONE OF SAID MEMBERS ADJACENT TO THE MARKED SURFACE OF SAID WASHER HAVING A PERIPHERAL EDGE EXTENDING RADIALLY BEYOND THE MARKING, SAID RIGID MEMBERS BEING RELATED TO THE FASTENER SHANK TO INSURE RADIAL DISPLACEMENT OF THE RESILIENT WASHER, WHEREBY RADIAL DISPLACEMENT OF THE MARKING PAST SAID PERIPHERAL EDGE MAY BE DETECTED, SAID MARKING ON SAID WASHER BEING DISPLACED PAST SAID PERIPHERAL EDGE WHEN THE FASTENER HAS BEEN TIGHTENED TO A PRESELECTED PRESSURE.
References Cited (Backward Citations)
US1994388A
Cited
US2464152A
Cited
US2413797A
Cited
GB748969A
Cited
US3021747A
Cited
US3060731A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-27 | 1968-04-27 | 1968-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-27 | 1972-04-27 | 1972-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-27 | 1976-04-27 | 1976-10-27 | $7700.00 | Window Closed / Lapsed |