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:
Jun. 18, 1996
Filed:
Aug. 03, 1994
Ben S Juday, Plainwell, MI (US);
Eaton Corporation, Cleveland, OH (US);
Abstract
A rotary blower (11) of the backflow type is disclosed including a housing portion (50), an inlet end wall portion (49), and a bearing plate (15), the housing portion defining cylindrical chambers (31,33) within which are disposed meshed rotors (35,37). The inlet end wall portion (49) defines an inlet port (51), and the housing portion (50) defines an outlet port (53) including a port end surface (59). The bearing plate (15) defines an end surface (29) and a relief chamber including a relief surface (29R), and the port end surface (59) is disposed in a plane defined by the relief surface (29R). As a result, resistance to the transfer of air through the blower is reduced, thus reducing required drive horsepower, and increasing the isentropic efficiency of the blower.