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:
Oct. 11, 1994
Filed:
Dec. 09, 1993
Applicant:
Inventor:
William V Smith, Tustin, CA (US);
Assignee:
Excellon Automation, Torrance, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23B / ;
U.S. Cl.
CPC ...
409235 ; 408 10 ; 408129 ; 74 8922 ;
Abstract
A cable passes over pulleys to precisely control the linear movement of a machine element back and forth along a guideway. The cable path connects multiple pulleys on stationary machine elements to multiple pulleys on the movable machine element, affording mechanical advantage to one driven pulley. A particular arrangement and alignment of the pulleys that pull in one direction with the pulleys that pull in the opposite direction cancel extraneous forces and moments and cause the resultant force to act on the center of gravity of the moving element.