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:
May. 24, 1977
Filed:
Mar. 01, 1974
Applicant:
Inventors:
Robert L Berry, Palos Verdes Peninsula, CA (US);
Axel G Dehne, Los Angeles, CA (US);
Assignee:
Hughes Aircraft Company, Culver City, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
F25b / ;
U.S. Cl.
CPC ...
62-6 ; 62 86 ;
Abstract
The Vuilleumier refrigerator cold free piston type displacer operates on pressure pulses generated by relative heating and cooling of gas to raise and lower the pressure in the entire interconnected system. The cold displacer operates with differential areas against which the line pressure acts, and a pneumatic spring to cause reciprocation of the displacer.
Berry, Robert. (1977). Vuilleumier refrigerator with separate pneumatically operated cold (U.S. Patent No. 4024727). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4024727
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile