Multiple stroke ratchet hand tool
US4742737A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 6, 1986 |
| Grant date | May 10, 1988 |
| Priority date | — |
| Expiry date | Jun 6, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B27/146
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A multiple stroke hand tool comprises a ram slidably mounted to a support member. A compact rotatable ratchet member is connected to the ram and pivotally mounted to the support member such that as a drive pawl engages the ratchet member, it is rotated causing the ram to move between an open position and a closed position. A resilient member is attached to the ratchet member and exerts a force on the ratchet member opposing rotation thereof. A latching means, pivotally mounted to the support member, cooperates with the ratchet member to prevent unwanted backward rotation of the ratchet member. The latching means disengages from the ratchet member at the end of a cycle which in turn causes the drive pawl to disengage from the ratchet member, allowing automatic return of the ram to the open position. A manual override is also provided such that the latching means may be disengaged as required. A fast take-up is also positioned on the hand tool such that quick, easy, one-handed operation is effected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.