Fuel-Powered rock breaker
US8967290B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 17, 2008 |
| Grant date | Mar 3, 2015 |
| Priority date | — |
| Expiry date | Apr 18, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25D9/10
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The invention relates to a fuel-powered breaker machine (1) which has a cylinder (2, 2.3, 2.4) with two pistons (3, 4) disposed therein. The first of the pistons (3) is adapted to opening and closing at least an inlet aperture (5, 6) on an inlet side (I) in a cylinder shell wall (7), and an outlet aperture (8) on an opposite outlet side (O) in the cylinder shell wall (7), and, when the apertures (5, 6, 8) are closed, to compressing against the second piston (4), which acts as the working piston of the breaker machine (1), an ignitable air/fuel mixture which is admitted via the inlet aperture/apertures (5, 6). The first piston (3) has a crown (11) which is shaped correspondingly to a crown (10) of the second piston (4) and which on said inlet side (I) has a recess (12) which serves, when the first piston (3) is at an upper dead center position, as a combustion chamber into which a spark plug (16) protrudes via the cylinder shell wall (7) on the inlet side (I), and, when the first piston (3) is at a lower dead center position, as an inlet chamber into which the inlet aperture/apertures (5, 6) leads/lead.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.