US3581530A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cylinder padlocks
Assignee: Individual
•
Filing: 1968-11-12
•
Granted: 1971-06-01
•
Expires: 1988-11-12
Abstract
Abstract This invention relates to cylinder padlocks, and has for an object such a padlock which cannot be opened by a single key and one person. Accordingly, the invention provides such a padlock with two coaxial locking cylinders of differing locking characteristics. These cylinders have cores that are connected so as to rotate together and they are coupled to a latching bar for locking a shackle for the padlock.
Inventors
- 👤 Giancarlo Raspadori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:10
CPC Classifications
E; E05; E05B; E05B35/00; E05B35/08; E05B35/12; E05B67/00; E05B67/06; E05B67/22; E05B67/24; E05B67/36; Y; Y10; Y10T; Y10T70/00; Y10T70/40; Y10T70/413; Y10T70/437; Y10T70/446; Y10T70/452; Y10T70/70; Y10T70/7441; Y10T70/7446; Y10T70/7458
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
93 words
A locking mechanism comprising a body, a movable shackle carried by said body, first stop pin means carried in one wall portion of said body and cooperating with said shackle, said body further including a plurality of coaxial aligned separate cores, locking cylinders having aligned pin tumblers in each of said cores, plural second stop pin means arranged in said body for cooperation with said locking cylinders to limit rotation thereof, latching bar means in another wall portion under control of at least one of said cores and arranged to control said shackle.
Claim 2
Dependent Claim
93 words
A locking mechanism comprising a body, a movable shackle carried by said body, first stop pin means carried in one wall portion of said body and cooperating with said shackle, said body further including a plurality of coaxial aligned separate cores, locking cylinders having aligned pin tumblers in each of said cores, plural second stop pin means arranged in said body for cooperation with said locking cylinders to limit rotation thereof, latching bar means in another wall portion under control of at least one of said cores and arranged to control said shackle.
Claim 3
Dependent Claim
50 words
A locking mechanism as claimeD in claim 1, wherein one of said cores includes axially extending notched means and the other of said cores includes axially extending link means arranged to engage into said notched means, said link means further including an edge portion adapted to operate said latching bar.
Claim 4
Dependent Claim
23 words
A locking mechanism as claimed in claim 1, wherein said plural stop pins are spaced from and in alignment with said pin tumblers.
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) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |