Transmission mechanism for pneumatic tool
US6464017B1 · kind B1 · utility
Inventor
Key dates
| Filing date | Apr 26, 2002 |
| Grant date | Oct 15, 2002 |
| Priority date | — |
| Expiry date | Apr 26, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B21/026
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A transmission mechanism for pneumatic tool includes a casing holding a main body and a spring therein, and a transmission shaft axially projected from a top of the casing to extend through an oil-retaining shaft sleeve via a washer. The washer includes a boss portion. The casing is provided along an inner peripheral surface close to the top thereof with a locating groove, in which a C-shaped retaining ring is received to firmly bear against the washer around the boss portion and thereby hold the transmission shaft to the casing, enabling the whole transmission mechanism to be conveniently mounted in the pneumatic tool. The C-shaped retaining ring isolates impact force acted on the main body via the spring to prevent the main body from deformation and breaking, and prevents the washer from overly tight contact with the oil-retaining shaft sleeve to reduce a torque output of the transmission mechanism.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.