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:
Aug. 30, 1988
Filed:
Dec. 14, 1987
Robert J Brinkman, Rochester, NY (US);
C. J. Winter Machine Works, Rochester, NY (US);
Abstract
The wedge-shaped operating member of a thread rolling attachment is reciprocated by a piston rod which extends into one end of a fluid pressure cylinder. A rotatable valve stem is mounted intermediate its ends in the opposite end of the cylinder for limited axial movement, and has thereon a valve seat normally closing a port which leads to a reversible valve that directs fluid under pressure selectively to opposite ends of the cylinder to shift the piston rod between retracted and advanced positions. The inner end of the stem is slidably connected to the piston rod so that when the latter reaches its advanced position it momentarily unseats the valve seat from the port to effect reversal of the valve and consequent return of the piston rod. The valve stem is rotatable to adjust the length of the stroke of the piston rod.