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:
Sep. 12, 2000
Filed:
Aug. 13, 1996
Lawrence F Yuda, Jr, Seneca, SC (US);
Prasad Balakrishnan, Westminster, SC (US);
Edward Camp Tibbals, Jr, Thomasville, NC (US);
Compact Air Products, Inc., Westminster, SC (US);
Abstract
A combination drive and method for applying power through a piston rod (A) operated by an air cylinder (B) is controlled by an elongated self-locking threaded drive member (C) rotated by an electric motor (D) for affording positioning and velocity control for the air operated cylinder and the guided piston rod which stops and is positively positioned upon cessation of operation of the electric motor. Control apparatus includes a valve housing (35) positioning a spool (40) fixed on one end to the elongated threaded drive member (C), and an assembly (45) for moving the spool axially in respect to the electric motor (D) through an axially compliant coupling (50) so that by controlling the motor the valve is thereby controlled.