Bicycle freewheel wrench pry adapter
US4374453A · kind A · utility
Inventor
Key dates
| Filing date | Jan 23, 1981 |
| Grant date | Feb 22, 1983 |
| Priority date | — |
| Expiry date | Jan 23, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/53991
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A bicycle freewheel wrench pry adapter for use with a freewheel wrench in removing a freewheel and its associated drive sprocket assembly from the bicycle axle is generally U-shaped and includes a channel in the base of the U opposite the legs of the U which fits the boss of the freewheel wrench engaged with the freewheel. The adapter includes a recess in the root of each leg of the U to assist in retaining a pry inserted between the legs for applying force through the freewheel wrench to the freewheel. The freewheel wrench pry adapter channel includes stress reliefs in the corners of the channel to avoid excessive stress concentrations in such corners which could induce breakage of the freewheel wrench pry adapter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.