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:
Jan. 03, 1984
Filed:
Oct. 19, 1981
Applicant:
Inventor:
John E McCullough, Carlisle, MA (US);
Assignee:
Arthur D. Little, Inc., Cambridge, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04B / ; F04C / ;
U.S. Cl.
CPC ...
417420 ; 418 55 ; 418 60 ; 464103 ; 464105 ;
Abstract
A scroll-type fluid motor or pump is provided with a roller Oldham coupling and bearing for guiding the orbiting scroll wrap relative to the fixed wrap, the coupling including plural, equal diameter cylindrical rollers disposed in overlapping but equally offset cylindrical openings forming bearing surfaces for the rollers. The diameter of each roller is such as to maintain the offset distance so that the orbiting scroll wrap is precisely guided relative to a fixed scroll wrap, whereby radial loads are fully carried by large rolling surfaces provided by the rollers. A magnetic drive system for the orbiting scroll is also disclosed.