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.:
Date of Patent:
Nov. 22, 1988
Filed:
Dec. 31, 1985
Hans-Josef Hosan, Neuwied, DE;
Martin Siemann, Bad Breisig, DE;
Stabilus GmbH, Koblenz-Neuendorf, DE;
Abstract
In a hydraulic positioning device a piston divides the cavity within a cylinder into two working chambers. The piston is connected with a piston rod passing through one end of the device and with a volume compensating rod through the other end of the device. The piston rod is provided with a passage which can be opened and closed by a valve so as to allow optional adjustment and blocking of the piston rod. The hydraulic liquid within the working chambers is subjected to volume variation in response to varying temperatures. With the aim of compensating such volume variations a partition at one end of the cylinder is supported by an abutment of the cylinder through an axially deformable compensating body having preferably a deformation force--deformation path characteristic which is responsive to temperature.