US3221792A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lockwasher and fastener assembly
Assignee: Illinois Tool Works Inc
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Filing: 1963-04-08
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Granted: 1965-12-07
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Expires: 1983-04-08
Abstract
No abstract record available.
Inventors
- 👤 Poupitch Ougljesa Jules
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:42
CPC Classifications
F; F16; F16B; F16B39/00; F16B39/22; F16B39/24; Y; Y10; Y10S; Y10S411/00; Y10S411/955; Y10S411/956; Y10S411/96
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
225 words
A LOCKING DEVICE INCLUDING A DISHED, AXIALLY RESILIENT ANNULAR WASHER BODY OF SHEET METAL HAVING AN UPPER SURFACE AND AN UNDERSIDE AND HAVING AN INNER MARGIN ADAPTED TO BE POSITIONED BENEATH THE CLAMPING SURFACE OF A ROTARY THREAD FASTENER SUCH AS A SCREW HEAD OR NUT, A PLURALITY OF INDIVIDUAL ABUTMENT MEANS IMPRESSED WITHIN AND SPACED CIRCUMFERENTIALLY ALONG SAID INNER WASHER MARGIN IN THE VICINITY OF THE WASHER CROWN AND BENEATH SAID UPPER SURFACE IN POSITION TO BE ENGAGED BY CORRESPONDING ABUTMENT MEANS ON THE CLAMPING SIDE OF A ROTARY THREADED FASTENER AS AN INCIDENT TO ROTARY TIGHTENING OF SAID FASTENER AS AN INCIDENT TO ROTARY SURFACES ALONG THE WASHER CROWN SLOPING FROM A HIGH POINT ADJACENT THE TOP OF ONE ABUTMENT MEANS TOWARD A LOW POINT IN THE VICINITY OF THE BASE OF THE NEXT ADJACENT ABUTMENT MEANS, THE INCLINATION OF SAID CAM SURFACES WITH RESPECT TO THE WASHER AXIS EXTENDING IN THE SAME GENERAL DIRECTION AS AND BEING GREATER THAN THE INCLINATION OF THE THREAD CONVOLUTIONS OF A COMPLEMENTARY ROTARY THREAD FASTENER WITH WHICH THE LOCKING DEVICE IS TO BE USED, WHEREBY TO INCREASE THE EFFECTIVENESS OF THE WASHER TO RESIST LOOSENING AFTER SAID COMPLEMENTARY THREAD FASTENER HAS BEEN ROTATED IN A TIGHTENING DIRECTION TO URGE SAID WASHER ABUTMENT MEANS IN THE DIRECTION OF SAID ROTATION, THE WORK ENGAGING EDGE MEANS OF THE
Claim 2
Dependent Claim
225 words
A LOCKING DEVICE INCLUDING A DISHED, AXIALLY RESILIENT ANNULAR WASHER BODY OF SHEET METAL HAVING AN UPPER SURFACE AND AN UNDERSIDE AND HAVING AN INNER MARGIN ADAPTED TO BE POSITIONED BENEATH THE CLAMPING SURFACE OF A ROTARY THREAD FASTENER SUCH AS A SCREW HEAD OR NUT, A PLURALITY OF INDIVIDUAL ABUTMENT MEANS IMPRESSED WITHIN AND SPACED CIRCUMFERENTIALLY ALONG SAID INNER WASHER MARGIN IN THE VICINITY OF THE WASHER CROWN AND BENEATH SAID UPPER SURFACE IN POSITION TO BE ENGAGED BY CORRESPONDING ABUTMENT MEANS ON THE CLAMPING SIDE OF A ROTARY THREADED FASTENER AS AN INCIDENT TO ROTARY TIGHTENING OF SAID FASTENER AS AN INCIDENT TO ROTARY SURFACES ALONG THE WASHER CROWN SLOPING FROM A HIGH POINT ADJACENT THE TOP OF ONE ABUTMENT MEANS TOWARD A LOW POINT IN THE VICINITY OF THE BASE OF THE NEXT ADJACENT ABUTMENT MEANS, THE INCLINATION OF SAID CAM SURFACES WITH RESPECT TO THE WASHER AXIS EXTENDING IN THE SAME GENERAL DIRECTION AS AND BEING GREATER THAN THE INCLINATION OF THE THREAD CONVOLUTIONS OF A COMPLEMENTARY ROTARY THREAD FASTENER WITH WHICH THE LOCKING DEVICE IS TO BE USED, WHEREBY TO INCREASE THE EFFECTIVENESS OF THE WASHER TO RESIST LOOSENING AFTER SAID COMPLEMENTARY THREAD FASTENER HAS BEEN ROTATED IN A TIGHTENING DIRECTION TO URGE SAID WASHER ABUTMENT MEANS IN THE DIRECTION OF SAID ROTATION, THE WORK ENGAGING EDGE MEANS OF THE
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) | 1968-12-06 | 1969-06-07 | 1969-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-06 | 1973-06-07 | 1973-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-06 | 1977-06-07 | 1977-12-07 | $7700.00 | Window Closed / Lapsed |