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:
Jul. 25, 1995
Filed:
Oct. 14, 1992
Yoshihiro Ishizaki, Kamakura, JP;
Takayuki Matsui, Fujisawa, JP;
Aisin Seiki Kabushiki Kaisha, Kariya, JP;
ECTI Kabushiki Kaisha, Kamakura, JP;
Abstract
A pulse tube refrigerator includes a compression space defined by a compression piston inside a cylinder, an expansion space defined by an expansion piston inside a cylinder, the expansion piston being reciprocated at an advance angle of a constant phase difference within a range of 10.degree.-45.degree. relative to the compression piston, and first and second thermal systems communicating the compression and expansion spaces. Each thermal system has a radiator, a regenerator, a cold head and a pulse tube, with the regenerator of the second thermal system being composed of two regenerator sections. The cold head of the first thermal system is made to perform a heat exchange with the second thermal system between the two regenerator sections thereof, whereby a very low temperature is obtained from the cold head of the second thermal system.