Tapered shackle padlock
US4835996A · kind A · utility
7Cited by
5References
23Claims
0Family size
Inventors
Key dates
| Filing date | Apr 12, 1988 |
| Grant date | Jun 6, 1989 |
| Priority date | — |
| Expiry date | Apr 12, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T70/7921
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A lateral extension of a shackle end and a lock body securely engage a hasp therebetween. Broadening the shackle end or tapering the shackle provides lateral extension. A shroud or encasement around the hasp, shackle and lock body provides additional security. A sliding shroud with attached shackle fits over the lock body encasement. Alternately, an extension of the lock body encasement itself serves as a shroud with a removable shackle, or a swing plate covers the hasp. Pivoting or rotating arms may secure the shackle to the lock body. Close contact with the hasp and encasement protects against tampering.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.