US3072093A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Visible inspection fastener
Assignee: Illinois Tool Works Inc
•
Filing: 1960-02-16
•
Granted: 1963-01-08
•
Expires: 1980-02-16
Abstract
No abstract record available.
Inventors
- 👤 Jr James C Lanius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:41
CPC Classifications
F; F16; F16B; F16B43/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
AN IMPROVED LOCK WASHER ADAPTED TO PROVIDE A CONSPICUOUS VISUAL INDICATION OF A LOOSE CONDITION OF A COACTING FASTENER AND COMPRISING, AN ANNULAR, GENERALLY COPLANAR BODY INCLUDING ON AT LEAST A SUBSTANTIAL ARCUATE PORTION THEREOF A PLURALITY OF CANTED LOCKING TEETH, AN INDICATOR FLAG FOR AUTOMATICALLY INDICATING THE PRESENCE OR ABSENCE OF THREADED FASTENER PRESSURE ON THE WASHER, SAID FLAG INCLUDING A RESILIENT CANTILEVER ARM SECURED AT ONE END TO THE PERIPHERY OF SAID WASHER BODY AND A PRESSURE FOOT CARRIED BY THE FREE END OF SAID ARM, SAID ARM BEING SHAPED TO SUPPORT SAID FOOT IN RADIALLY SPACED RELATION TO THE PERIPHERY OF SAID BODY WHEN SAID ARM IS IN ITS UNSTRESSED CONDITION, AND SAID BODY DEFINING IN THE OUTER PERIPHERY THEREOF AN ARCUATE RECESS ADAPTED TO RECEIVE SAID PRESSURE FOOT UPON FLEXING OF SAID ARM TO MOVE SAID FOOT TOWARD THE CENTER OF SAID BODY.
Claim 2
Dependent Claim
147 words
AN IMPROVED LOCK WASHER ADAPTED TO PROVIDE A CONSPICUOUS VISUAL INDICATION OF A LOOSE CONDITION OF A COACTING FASTENER AND COMPRISING, AN ANNULAR, GENERALLY COPLANAR BODY INCLUDING ON AT LEAST A SUBSTANTIAL ARCUATE PORTION THEREOF A PLURALITY OF CANTED LOCKING TEETH, AN INDICATOR FLAG FOR AUTOMATICALLY INDICATING THE PRESENCE OR ABSENCE OF THREADED FASTENER PRESSURE ON THE WASHER, SAID FLAG INCLUDING A RESILIENT CANTILEVER ARM SECURED AT ONE END TO THE PERIPHERY OF SAID WASHER BODY AND A PRESSURE FOOT CARRIED BY THE FREE END OF SAID ARM, SAID ARM BEING SHAPED TO SUPPORT SAID FOOT IN RADIALLY SPACED RELATION TO THE PERIPHERY OF SAID BODY WHEN SAID ARM IS IN ITS UNSTRESSED CONDITION, AND SAID BODY DEFINING IN THE OUTER PERIPHERY THEREOF AN ARCUATE RECESS ADAPTED TO RECEIVE SAID PRESSURE FOOT UPON FLEXING OF SAID ARM TO MOVE SAID FOOT TOWARD THE CENTER OF SAID BODY.
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) | 1966-01-07 | 1966-07-09 | 1967-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-07 | 1970-07-09 | 1971-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-07 | 1974-07-09 | 1975-01-08 | $7700.00 | Window Closed / Lapsed |