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. 11, 1978
Filed:
Feb. 22, 1977
Rune Valdemar Glanvall, Norrkoping, SE;
Stal Refrigeration AB, Norrkoping, SE;
Abstract
A cylindrical rotor journalled in a housing has an even number of vanes slidable in slots in the rotor and adapted to sealingly engage the inside wall surface of the housing to form working chambers between the rotor, said wall surface and the vanes, the rotor being provided with recesses adapted to cooperate with outlet parts in the end walls of the housing to form outlet passages for compressed gas. Piston means are located radially inside each of these recesses and connected to a diametrically opposed vane, each piston means being movable into the corresponding recess by said vane so as to fill up the recess and thereby force the gas therein out through the corresponding outlet port.