Hydraulic impulse tool with enhanced fluid seal
US5611404A · kind A · utility
12Cited by
15References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 28, 1995 |
| Grant date | Mar 18, 1997 |
| Priority date | — |
| Expiry date | Sep 28, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B21/02
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An impulse tool (10) including an impulse generator (19, 119) utilizes an enhanced seal to reduce leakage of hydraulic fluid. The annular clearance in the pressure plate (24, 124) is sealed around the spindle (30, 130) with a resilient seal (38, 138). A primary passage (40, 140) through the pressure plate is provided to compensate for expansion of the fluid. The use of the primary passage (40, 140), which is not susceptible to enlargement due to wear, minimizes pressure peaks in the accumulator reservoir (42, 142), and results in less leakage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.