Manual hoisting and pulling apparatus
US4420144A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 13, 1981 |
| Grant date | Dec 13, 1983 |
| Priority date | — |
| Expiry date | Oct 13, 2001 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66D3/14
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A hand hoist or pulling apparatus including a drive clutch assembly, and a drive shaft and transmission gears associated with the assembly for pulling a chain on a load sheave by oscillating a lever. A holding member and a stop lever for preventing the member from movement are provided to hold a pinion on one end of the drive shaft in meshing engagement with the transmission gears and also to hold the pinion disengaged therefrom when the drive shaft is shifted. The holding member is held stationary against rotation, mounted on the clutch assembly and restrained from axial movement by the stop lever which is biased by a spring and pivotally mounted on a side plate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.