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:
Feb. 16, 1988
Filed:
Nov. 01, 1985
Joseph S Olasz, Kingston, RI (US);
Robert P Callaghan, Jr, Westerly, RI (US);
Federal Products Corp., Providence, RI (US);
Abstract
An improved drive system for machines incorporating air bearings is disclosed. The drive system eliminates backlash, introduces no vibrations or noise into the moving structures, requires no lubrication and excells in being compact and simple. The drive system essentially includes a stationary bar mounted in one axis of motion of the machine, a wedge member mounted for drivingly engaging the bar on one side, a preloader mounted for operatively engaging the bar on the opposite side, and a pair of springs urging the preloader to urge the wedge member into driving engagement with the bar. The drive system is coupled to a positioning servo system, which provides control of the drive system's position and speed. Preferably, the wedge angle of the wedge member is from about 15.degree. to about 30.degree.. Preferably, both the bar and the wedge member are formed from a group of materials possessing at least about 65 Rockwell hardness.