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. 29, 1992
Filed:
Dec. 20, 1992
Applicant:
Inventors:
Jason J Hill, St. Louis, MO (US);
Mark S Amalfitano, St. Louis, MO (US);
Assignee:
Emerson Electric Co., St. Louis, MO (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16H / ; F16H / ; B60N / ;
U.S. Cl.
CPC ...
74 8915 ; 7442 / ; 297330 ;
Abstract
An improvement to a linear actuator (9) having a lead screw (15) received in a drive tube assembly (17) is provided in the form of a bushing (41) mounted on the end of the screw. The outer dimension of the bushing generally corresponds to the inner dimension of the tube. The bushing has a recess (53) formed in one face to accommodate a washer (55). A retaining ring (59) holds the bushing in place. The bushing serves both to prevent contact between the lead screw and tube to reduce noise during actuator operation, and as a positive stop to prevent disengagement of the lead screw from the drive tube assembly.