US3744286A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tubular key
Assignee: Fort Lock Corp
•
Filing: 1972-02-01
•
Granted: 1973-07-10
•
Expires: 1992-02-01
Abstract
Abstract A tubular key for axial pin tumbler locks which is integrally and unitarily formed from a piece of tubing with the handle end being formed by a flattening of the tube for a predetermined distance from one end.
Inventors
- 👤 P Trainor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:59
CPC Classifications
E; E05; E05B; E05B19/00; Y; Y10; Y10T; Y10T70/00; Y10T70/70; Y10T70/7441; Y10T70/778; Y10T70/7791; Y10T70/7842; Y10T70/7847; Y10T70/7853; Y10T70/7876
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
115 words
For use with an axial pin tumbler lock having an annular keyway and axially directed combination pins, a tubular key comprising a tubular shank and an integrally formed handle portion, said key being a unitary preselected length of tubing and having said handle portion formed from flattening an end of said tube to a predetermined distance from said end so that said handle portion includes a bi-layered thickness, said flattened portion gradually tapering into the tubular shank on both sides of said flattened portion and the tubular shank end containing circumferentially spaced combinated notches about its periphery for engaging and aligning the axially directed combination pins of said lock when inserted in the annular keyway.
Claim 2
Dependent Claim
115 words
For use with an axial pin tumbler lock having an annular keyway and axially directed combination pins, a tubular key comprising a tubular shank and an integrally formed handle portion, said key being a unitary preselected length of tubing and having said handle portion formed from flattening an end of said tube to a predetermined distance from said end so that said handle portion includes a bi-layered thickness, said flattened portion gradually tapering into the tubular shank on both sides of said flattened portion and the tubular shank end containing circumferentially spaced combinated notches about its periphery for engaging and aligning the axially directed combination pins of said lock when inserted in the annular keyway.
Claim 3
Dependent Claim
18 words
A tubular key as claimed in claim 1 wherein said flattened handle portion is chamfered adjacent its end.
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) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |