Externally captured ratchet head and housing assembly
US6490953B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 12, 2001 |
| Grant date | Dec 10, 2002 |
| Priority date | — |
| Expiry date | Apr 12, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B21/004
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The present invention provides novel ratchet head configurations for externally capturing a ratchet mechanism within the head of a powered ratchet wrench, such as a pneumatic ratchet wrench for example. Externally capturing the ratchet mechanism prevents the separation of the ears of the ratchet mechanism, caused by the application of torque to the ratchet head design. In prior art designs, repeated application of torque to the ratchet head caused separation of the ratchet head ears, and in turn, malfunctioning of the ratchet caused by loss of tension between the yoke of the ratchet and ratchet head itself. By preventing the ears from separating, the present invention maintains proper operation, and increased tool life. Furthermore, the tools maintenance and repair costs are decreased.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.