Variable volume accumulator
US9308635B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 28, 2013 |
| Grant date | Apr 12, 2016 |
| Priority date | — |
| Expiry date | Sep 6, 2034 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25D2209/002
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A hammer assembly including a hammer housing and a work tool movably supported in the hammer housing is provided. A gas chamber is defined in the hammer housing and contains a compressible gas. An accumulator assembly includes an interior space. A barrier divides the interior space into a first interior portion containing a compressible gas and a second interior portion configured to receive a pressurized fluid. The barrier is configured to be movable in response to changing the amount of pressurized fluid in the second interior portion and such that movement of the barrier varies the volume of the first interior portion. The first interior portion is in communication with the gas chamber. A control valve assembly is configured for selectively placing the second interior portion of the accumulator assembly in communication with a pressurized fluid source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.