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:
Jul. 26, 1988
Filed:
Apr. 28, 1987
Michael D Snyder, Binghamton, NY (US);
Bruce W LeRoy, Endicott, NY (US);
Douglas A Biesecker, Clark Summit, PA (US);
Henry J Soth, Brackney, PA (US);
James E York, Endicott, NY (US);
Universal Instruments Corp., Binghamton, NY (US);
Abstract
Pressures applied to a component for pickup and placement thereof are each selectable, according to introduction of gas under pressure into a piston and cylinder configuration defined by a tool, such as a vacuum spindle, telescopically supported in a tool holder. An actuator with closed loop velocity and displacement control moves the tool holder to and fro along a longitudinal axis according to a known programmable controller. Thus, compression of the gas and relative displacement between the tool and holder allows controlled pick and place pressures to be varied and monitored programmably. The pressurized gas also acts to prevent dirt contamination of the bearing surface between the tool and holder and consequent impairment of telescoping and rotational movements therebetween.