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. 14, 1994
Filed:
Aug. 05, 1993
Steven K Kiefer, Battle Creek, MI (US);
Eaton Corporation, Cleveland, OH (US);
Abstract
A rotor-shaft subassembly (33) is disclosed of the type for use in a Roots blower supercharger. The subassembly includes a rotor (39) mounted for rotation on a driveshaft (41) at forward (49,53) and rearward (57,51) axially spaced-apart locations. The rotor (39) is a cast member with each lobe thereof (61,63,65) defining a hollow chamber (71,73,75). The rotor includes a cylindrical web portion (67) disposed axially between the forward and rearward locations. Each lobe cooperates with the web portion to define a core opening (81,83,85) adapted to facilitate removal of a core from the hollow chamber after completion of the casting process. Each core opening provides open communication between its respective hollow chamber and the shaft bore, and each is disposed axially between the forward and rearward locations, so that after the rotor is press-fit on the shaft, there is no leak path of pressurized air into the hollow chambers.