Wrench
US9687969B2 · kind B2 · utility
Assignees
Inventor
Key dates
| Filing date | Apr 3, 2013 |
| Grant date | Jun 27, 2017 |
| Priority date | — |
| Expiry date | Dec 29, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B17/00
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The present invention provides a wrench, which comprises a working part and a handle, the working part includes a main axle perpendicular to the handle and mutually cooperated bidirectional pawl and ratchet wheel, in which the ratchet wheel is arranged so as to be caused by the handle, the bidirectional pawl is arranged to rotate the main axle and has a first pawl and a second pawl which are opposite to the clutch direction between the ratchet wheel, the working part also includes a direction switching mechanism for setting clutch direction of the bidirectional pawl and the ratchet wheel; the direction switching mechanism is arranged such that a first pawl and a second pawl are engaged with the ratchet wheel selectively, such that when handle is rotated in the direction set by the direction switching mechanism, the ratchet wheel is engaged with the bidirectional pawl, then rotates the main axle; when the handle is rotated in the direction opposite to the direction set by the direction switching mechanism, the ratchet wheel and the bidirectional pawl slide over each other, and the main axle remains stationary; the working part also includes a planetary gear speed increasing mechanis…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.