Hydraulic-powered device
US4047595A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 22, 1975 |
| Grant date | Sep 13, 1977 |
| Priority date | — |
| Expiry date | Sep 22, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25D17/26
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
In a first embodiment an improved, hydraulic-powered paving breaker is depicted in which a novel arrangement is provided for internally lubricating the breaker. In the arrangement an elbow taps off discharging pressured hydraulic fluid from the breaker and, through a manifold line coupled to fittings, which are in penetration of the housing of the breaker, admits hydraulic fluid into the breaker to lubricate a reciprocating plunger, moil, and O-ring seals. In an alternative embodiment, a conduit is formed entirely within the breaker for the same purpose. In both embodiments a restrictor device is interposed between the supply of pressured hydraulic fluid and the points of fluid injection to insure a uniform supply of fluid to the latter at a given prescribed pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.