Breaker construction and valve therefor
US3971448A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 18, 1975 |
| Grant date | Jul 27, 1976 |
| Priority date | — |
| Expiry date | Feb 18, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25D9/18
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A fluid operated tool is provided which is operable particularly for purposes of causing the linear movement of a tool member in at least one direction. The tool includes a main body, a trigger, an On-Off valve spool, a main piston, a reversing assembly, an accumulator and means for attaching the tool member to the tool. The main body is provided with a plurality of bores in which the On-Off valve spool, the main piston, the reversing assembly, and the accumulator are respectively positioned, and a plurality of channels which function to interconnect the bores. The On-Off valve spool is supported in one of the bores in such a manner as to be operatively connected to the trigger whereby the valve spool moves between first and second positions in response to the actuation of the trigger thereby to selectively open and close various ones of the channels formed in the main body. The main piston is supported in a longitudinally extending bore whereby to be reciprocal therein between a first position wherein the main piston drives the tool member toward one end of the tool, the tool member being attached to the main body through the operation of means provided for this purpose, and a sec…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.