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:
Dec. 02, 1986
Filed:
Jul. 26, 1984
Shigetaro Tagawa, Tochigi, JP;
Mitsuru Murata, Tochigi, JP;
Kazuo Sekigami, Tochigi, JP;
Masahiko Sugiyama, Tochigi, JP;
Gen Konno, Tochigi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A rotary compressor has a main bearing and a sub-bearing which are disposed on both sides of a cylinder, and a vane which is inserted at an eccentric crank pin portion of a crankshaft and is adapted to reciprocate while being in contact at one end thereof with a roller eccentrically rotating inside the cylinder. An oil feeding mechanism for the rotary compressor comprises: an oil feeding hole provided in a portion of the crankshaft closer to the end surface of a sub-journal of the crankshaft; an oil hole provided in a crank pin portion of the crankshaft such as to communicate with both the oil feeding hole and an oil groove formed on the crank pin portion; a spiral oil groove formed in the outer periphery of a main journal of the crankshaft such as to spiral in the direction opposite to the rotational direction of the crankshaft; and a spiral oil groove formed in the outer periphery of the sub-journal of the crankshaft such as to spiral in the same direction as the rotational direction of the crankshaft.