Support for elastomeric disc valve in combustion driven fastener hand tool
US10759031B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 7, 2016 |
| Grant date | Sep 1, 2020 |
| Priority date | — |
| Expiry date | Dec 24, 2037 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25C1/08
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A valve support for use with a valve in a combustion driven fastener hand tool, the valve being formed by a flexible disc affixed to a central shaft having a circumferential edge resting against an anular valve seat affixed to a wall of a combustion chamber with the valve in a closed position is disclosed. The valve support comprises a plate affixed to the central shaft and against the flexible disc, the plate having one or more ports therethrough. In a closed position, the flexible disc has a circumferential edge resting against an anular valve seat affixed to a wall of a combustion chamber but also a central portion of the flexible disc is proximate or contacting a central portion of the support plate on the same side of the disc as the annular valve seat. Various port configuration are possible.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.