Working cylinder for power tool with piston lubricating system
US11413734B2 · kind B2 · utility
2Cited by
47References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 16, 2019 |
| Grant date | Aug 16, 2022 |
| Priority date | — |
| Expiry date | Mar 4, 2040 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/162
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A fastener driving tool with a working cylinder and a piston, the piston outer surface having a lubricant-saturated foam material that stores and dispenses lubricant into the piston-cylinder wall interface, thereby increasing the performance and lifespan of the tool. Another embodiment discloses a two-part piston in which the bottom portion is made of metal and absorbs the main mechanical loading forces of the piston drive and return strokes, and the top portion is made of a non-metallic material that has surfaces that act as sliding bearings against the inner wall of the cylinder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.