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:
Nov. 26, 1991
Filed:
Aug. 01, 1989
Applicant:
Inventor:
John Santangelo, East Freetown, MA (US);
Assignee:
Codman & Shurtleff, Inc., Randolph, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61B / ;
U.S. Cl.
CPC ...
128 20 ; 74422 ;
Abstract
A low wear bearing system for a surgical retractor including usually four bearings recessed in the retractor housing, each bearing having a generally rectangular projection extending into a corresponding slot in the rack of the rack and pinion type retractor. There are two bearings on each side of the rack spaced longitudinally along the rack. The bearings provide an enlarged buffer area of contact between the rack and the housing to distribute the relatively high internal retraction forces that can be experienced during tissue retraction.