US3786659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lock key
Assignee: Schlage Lock Co LLC
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Filing: 1972-11-15
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Granted: 1974-01-22
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Expires: 1992-11-15
Abstract
Abstract A lock key having a shank elongated along an axis and having a predetermined width also has a substantially flat bow integral with the shank and extending laterally thereof for a much greater width to provide extensions on opposite sides of the shank axis. A hard, integral, non-frangible turning pad is preferably molded in intimate contact with the bow and extends out from the margins of the bow to encase the bow except at the junction of the bow with the shank. The pad furnishes spaced torque zones that are supported by the encased bow to resist yielding of the extended turning pad under torque.
Inventors
- 👤 G Elder
- 👤 H Lehnhoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:39
CPC Classifications
E; E05; E05B; E05B19/00; E05B19/04; E05B19/24; Y; Y10; Y10T; Y10T70/00; Y10T70/70; Y10T70/7441; Y10T70/778; Y10T70/7791; Y10T70/7802; Y10T70/7876
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
101 words
A lock key comprising a shank elongated along an axis and having a predetermined width measured radially from said axis; a substantially flat bow integral with and extending across one end of said shank to a width greater than said predetermined width to provide torque zones on opposite sides of said bow and on opposite sides of said axis; and a hard, non-frangible, integral turning pad in intimate contact with, extending beyond and encasing said bow except at the junction of said bow and said shank and overlying and supported by said torque zones against yielding under torque about said axis.
Claim 2
Dependent Claim
101 words
A lock key comprising a shank elongated along an axis and having a predetermined width measured radially from said axis; a substantially flat bow integral with and extending across one end of said shank to a width greater than said predetermined width to provide torque zones on opposite sides of said bow and on opposite sides of said axis; and a hard, non-frangible, integral turning pad in intimate contact with, extending beyond and encasing said bow except at the junction of said bow and said shank and overlying and supported by said torque zones against yielding under torque about said axis.
Claim 3
Dependent Claim
14 words
A device as in claim 1 in which said turning pad is substantially opaque.
Claim 4
Dependent Claim
22 words
A device as in claim 1 in which said bow is provided with depressions and said turning pad substantially fills said depressions.
Claim 5
Dependent Claim
27 words
A device as in claim 1 in whiCh said bow is provided with projections and said turning pad surrounds said projections and leaves the ends thereof exposed.
Claim 6
Dependent Claim
32 words
A device as in claim 1 in which said shank and said bow are metal of a predetermined coefficient of expansion and said turning pad is plastic of similar coefficient of expansion.
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) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |