Hoist device
US5743576A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 7, 1997 |
| Grant date | Apr 28, 1998 |
| Priority date | — |
| Expiry date | Mar 7, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T403/32975
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A hoist device for fixed engagement to a threaded bore on an outer surface of a load member is provided. The hoist device comprises a load engaging stud with a force supporting head, a cylindrical body portion with a lower annular bearing shoulder and a threaded shank depending from the annular shoulder of the body portion. A base member having a body portion with a central passage through the base member and allowing a free swivel engagement of the base member with the load engaging stud is provided. The central passage of the base member, having an upper recess for capturing the force supporting head and an upper annular shoulder for transmitting a force from the base member to the supporting head when the base member is pulled from the load member is also provided. A hoist ring is secured between the support member and the base member while allowing the base member to swivel around the stud. A slot in one of the members captures the hoist ring while allowing the hoist ring to pivot in the slot. The stud includes a tool driving portion and a force supporting head, the tool driving portion includes the tool engaging portion and the stud and access openings in one of the members re…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.