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:
Apr. 27, 1982
Filed:
Dec. 06, 1979
Emanuel D Fry, Tecumseh, MI (US);
Herbert G Siewert, Sylvania, OH (US);
Tecumseh Products Company, Tecumseh, MI (US);
Abstract
A cylinder unloading mechanism for a multi-cylinder compressor including a block having a plurality of cylinders. Each cylinder is closed by a valve plate having suction and discharge ports communicating with the cylinder and respectively having spring-biased suction and discharge valves. A cylinder head is secured to the valve plate and has suction and discharge chambers respectively communicating with the suction and discharge ports. Suction and discharge passages respectively communicate with the suction and discharge chambers in the head. A partition in the head divides the suction chamber into first and second sections respectively communicating with the suction port and suction passage, the partition having an unloading port communicating with the two sections of the suction chamber. A valve selectively opens and closes the unloading port and is actuated by a double-acting fluid power cylinder mounted on the head, the cylinder having fluid pressure lines adapted to be connected to an external source of fluid under pressure.