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. 11, 2011
Filed:
Dec. 10, 2008
Matthew G. Swartzlander, Battle Creek, MI (US);
Matthew G. Swartzlander, Battle Creek, MI (US);
Eaton Corporation, Cleveland, OH (US);
Abstract
A method of designing rotors for a Roots blower comprising a housing having cylindrical chambers, the housing defining an outlet port (). The blower includes meshed, lobed rotors () disposed in the chambers, each rotor including a plurality N of lobes (), each lobe having first () and second () axially facing end surfaces. Each lobe has its axially facing surfaces defining a twist angle (TA), and each lobe defines a helix angle (HA). The method of designing the rotor comprises determining a maximum ideal twist angle (TA) for the lobe as a function of the number N of lobes on the rotor, and then determining a helix angle (HA) for each lobe as a function of the maximum ideal twist angle (TA) and an axial length (L) between the end surfaces of the lobe. A rotor designed in accordance with this method is also provided.