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. 28, 1993
Filed:
Feb. 05, 1993
Richard Harrison, Aurora, OR (US);
Lei Sun, Tualatin, OR (US);
Synektron Corporation, Portland, OR (US);
Abstract
A press fit machine for assembling an electric motor which includes a hub having an upper bearing and a stator assembly having a lower bearing, includes an upper and lower press fit fixtures for holding the hub and stator respectively in a preloaded condition prior to motor assembly and for a predetermined period of time afterward. The machine press fits the two halves of the motor together while maintaining appropriate preloads on the upper and lower bearings to prevent excess looseness in the bearings or excessive stiffness. The preload ensures that the bearing will function correctly after assembly because it is maintained during a period of time that the glue joining the hub and stator assembly together sets.