The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 9920778 B1

PDF
Full Text
Expired
Date of Patent:
Mar. 20, 2018

Filed:

Dec. 21, 2013
Applicant:

Hydac Drive Center Gmbh, Langenau, DE;

Inventor:

Ralf Bosch, Boerslingen, DE;

Assignee:

HYDAC DRIVE CENTER GMBH, Langenau, DE;

Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F15B 21/04 (2006.01); F01P 7/00 (2006.01); F04B 49/00 (2006.01); F04D 25/02 (2006.01); F04D 27/00 (2006.01); G05D 23/02 (2006.01);
U.S. Cl.
CPC ...
F15B 21/042 (2013.01); F04D 25/02 (2013.01); F04D 27/004 (2013.01); G05D 23/02 (2013.01);
Abstract

A valve () for the temperature-dependent control of at least one hydraulic load includes a valve housing () with a tank connection (T), a working connection (A), and a supply connection (P). A control piston () controls the connections (A, P, T), is moveable in the valve housing () and is preloaded by a working spring (). A thermal element () can be supplied with a fluid at a specifiable temperature (T) and is actively coupled to the control piston (). The control piston can be moved by control pressure present at the supply connection (P). The thermal element () interacts with the working spring () such that the thermal element causes a temperature-dependent change of the preload force acting on the control piston ().


Find Patent Forward Citations

Bosch, Ralf. (2018). Valve for the temperature-dependent control of at least one hydraulic load (U.S. Patent No. 9920778). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/9920778

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