Relief-valve jet
US6805148B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 7, 2002 |
| Grant date | Oct 19, 2004 |
| Priority date | — |
| Expiry date | Sep 2, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7762
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The invention concerns a pressure-limiting valve to limit the pressure of hydraulic oil which can be admitted through two intakes, consisting of a control rod in a cylindrical housing equipped with the two intakes, which can be moved against spring force, which, when one intake is exposed to oil under high pressure, connects the other intake supplied with oil kept under low pressure to an outlet leading to the pressure-limiting valve.A pressure-limiting valve of simple construction, which easily installed, is achieved through the fact that the control rod is provided with an axial hole in which a second control rod can be moved against the force of at least one limiting spring adjusted to the pressure to be limited, and that the first control rod, depending on which of the two intakes is subjected to the high pressure, is pushed into a position in which the second control rod connects the intake that is under low pressure to an outlet opening, while overcoming the force of the limiting spring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.