Piston for a hydrostatic cylinder block
US6293185A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 2000 |
| Grant date | Sep 25, 2001 |
| Priority date | — |
| Expiry date | Feb 28, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23P15/10
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A piston for use in the cylinder block of a hydraulic power unit. The piston has an elongated cylindrical body and one end terminating in a spherical surface. The piston is composed of a body and insert which are made from different materials, preferably metallic materials, and joined together. The piston body takes the form of a solid cylinder or a hollow cylindrical tube. The spherical surface takes the form of an internal spherical socket or an external spherical ball. The insert takes an elongated or abbreviated form providing for both open cavity and closed cavity piston configurations. The piston includes a conduit which traverses the body and insert, providing a path for pressurized fluid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.