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:
Feb. 25, 1992
Filed:
Jan. 14, 1991
Wilhelm Strasser, Bergisch-Gladbach, DE;
Leybold AG, Hanau, DE;
Abstract
A refrigerator operating on the Gifford-McMahon principle includes a housing defining a work chamber; a displacement member received in the housing and being movable back and forth between two dead center positions; a regenerator mounted in the displacement member; a piston attached to and extending from the displacement member; a drive cylinder disposed in the housing and being arranged for slidably receiving the piston; an arrangement for introducing a low-pressure working gas and a high-pressure working gas into the drive cylinder and the work chamber for reciprocating the displacement member between its dead center positions; a device for exerting a continuous force on the displacement meber in one of the directions of its reciprocation; and a throttle-containing conduit communicating with the drive cylinder for continuously maintaining either the low-pressure gas or the high-pressure gas in the drive cylinder dependent upon the direction in which the continuous force is oriented.