Load compensating hydraulic rate control
US7967116B2 · kind B2 · utility
18Cited by
8References
23Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 10, 2007 |
| Grant date | Jun 28, 2011 |
| Priority date | — |
| Expiry date | Apr 26, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/2202
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A rate control device includes an outer cylinder defining an interior chamber having a longitudinal axis and containing a hydraulic fluid. A piston head mounted to a proximal end or a piston rod is slidably positionable within the interior chamber. A rate control valve is disposed within an interior cavity of the piston head coaxially with the longitudinal axis of the interior chamber of the cylinder. The rate control valve includes a variable flow rate orifice and a fixed flow rate orifice disposed in series relationship with respect to fluid flow through the rate control valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.