Ratchet wheel with asymmetric arcuate concave teeth or non-arcuate concave teeth and socket wrench with such ratchet wheel
US6301998A · kind A · utility
35Cited by
9References
20Claims
0Family size
Inventor
Key dates
| Filing date | Aug 9, 2000 |
| Grant date | Oct 16, 2001 |
| Priority date | — |
| Expiry date | Aug 9, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B13/463
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A ratchet wheel includes an outer periphery. The outer periphery includes a number of arcuate concave teeth each having two sides and an intersection of the two sides. The ratchet wheel includes a center, a line from the center to the intersection dividing an angle between the two sides into two unequal portions, thereby forming asymmetric arcuate concave teeth to provide improved structural strength and improved torque. In another embodiment, the concave teeth are non-arcuate to reduce the formation time for the teeth, thereby reducing the production cost.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.