Hydraulic pressure spring and method of manufacturing the same
US9062732B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 17, 2008 |
| Grant date | Jun 23, 2015 |
| Priority date | — |
| Expiry date | Oct 29, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49615
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hydraulic pressure spring 1 includes a hollow cylindrical cylinder 4 having a threaded portion 3 at one end 2 thereof; a closure means 5 which is threadedly engaged with the threaded portion 3 at the one end 2 of the cylinder 4 and closes the one end 2 of the cylinder 4; a closure means 7 which is provided at the other end 6 of the cylinder 4 and closes the other end 6 of the cylinder 4; a compressible liquid 9 which is sealed in an interior 8 of the cylinder 4 and is pressurized to a predetermined pressure; a rod 10 which is passed through the closure means 5 movably in an axial direction A and causes the liquid 9 in the interior 8 of the cylinder 4 to undergo a pressure rise as the rod 10 enters the interior 8 of the cylinder 4; and a piston 11 disposed in the interior 8 of the cylinder 4 and attached to one end of the rod 10.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.