US3306154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compressive load limit indicators
Assignee: Mcculloch Corp
•
Filing: 1965-10-23
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Granted: 1967-02-28
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Expires: 1985-10-23
Abstract
No abstract record available.
Inventors
- 👤 Jay R Bailey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:56
CPC Classifications
F; F16; F16B; F16B31/00; F16B31/02; F16B31/028
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
168 words
A PRELOAD WASHER FOR INDICATING WHEN A PREDETERMINED TORQUE HAS BEEN APPLIED TO TIGHTEN A BOLT COMPRISING: (A) A DISC HAVING AN OPEN CENTRAL PORTION THERETHROUGH TO RECEIVE A BOLT; AND (B) A PERIPHERAL GROOVE EXTENDING INWARDLY FROM THE CIRCUMFERENTIAL SURFACE OF SAID DISC, (C) SAID GROOVE SPACING THE UPPER AND LOWER PORTIONS OF SAID DISC TO FORM FLANGES AT BOTH ENDS, (D) SAID FLANGES BEING INTEGRAL WITH A RADIALLY INWARDLY DEFORMABLE, GENERALLY CYLINDRICAL SPACER EXTENDING BETWEEN THE OPEN CENTRAL PORTION AND THE INNER PERIPHERY OF SAID GROOVE, (E) SAID SPACER BEING PRESSURE RESPONSIVE TO FORM A BEAD EXTENDING INTO SAID OPEN CENTRAL PORTION WHEN SAID FLANGES ARE COMPRESSED TOWARD EACH OTHER TO SUBSTANTIALLY NARROW SAID GROOVE, (F) THE BEAD BEING FORMED FREE OF STOPPING SURFACES WITHIN SAID CENTRAL PORTION AFTER THE ELASTIC LIMIT OF THE SPACER HAS BEEN EXCEEDED BY SAID COMPRESSION AND PLASTIC YIELDING HAS OCCURRED, (G) SAID SPACER HAVING A LENGTH LESS THAN THE VALUE OF L FOUND BY SOLVING THEREFOR IN THE FOLLOWING EQUATIONS:
Claim 2
Dependent Claim
168 words
A PRELOAD WASHER FOR INDICATING WHEN A PREDETERMINED TORQUE HAS BEEN APPLIED TO TIGHTEN A BOLT COMPRISING: (A) A DISC HAVING AN OPEN CENTRAL PORTION THERETHROUGH TO RECEIVE A BOLT; AND (B) A PERIPHERAL GROOVE EXTENDING INWARDLY FROM THE CIRCUMFERENTIAL SURFACE OF SAID DISC, (C) SAID GROOVE SPACING THE UPPER AND LOWER PORTIONS OF SAID DISC TO FORM FLANGES AT BOTH ENDS, (D) SAID FLANGES BEING INTEGRAL WITH A RADIALLY INWARDLY DEFORMABLE, GENERALLY CYLINDRICAL SPACER EXTENDING BETWEEN THE OPEN CENTRAL PORTION AND THE INNER PERIPHERY OF SAID GROOVE, (E) SAID SPACER BEING PRESSURE RESPONSIVE TO FORM A BEAD EXTENDING INTO SAID OPEN CENTRAL PORTION WHEN SAID FLANGES ARE COMPRESSED TOWARD EACH OTHER TO SUBSTANTIALLY NARROW SAID GROOVE, (F) THE BEAD BEING FORMED FREE OF STOPPING SURFACES WITHIN SAID CENTRAL PORTION AFTER THE ELASTIC LIMIT OF THE SPACER HAS BEEN EXCEEDED BY SAID COMPRESSION AND PLASTIC YIELDING HAS OCCURRED, (G) SAID SPACER HAVING A LENGTH LESS THAN THE VALUE OF L FOUND BY SOLVING THEREFOR IN THE FOLLOWING EQUATIONS:
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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) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |