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:
Nov. 14, 1989
Filed:
Dec. 12, 1988
James A Neff, Birmingham, MI (US);
MAC Valves, Inc., Wixom, MI (US);
Abstract
A three-way normally closed, pilot air valve for supplying pressurized pilot air to a directional flow control air valve. The valve includes a valve body structure having a pilot air inlet port, a cylinder port, an exhaust port, an axial bore therethrough. A first passageway connects the pressurized pilot air inlet port to the cylinder port. A second passageway connects the cylinder port with the exhaust port. A balanced captive poppet valve spool is movably mounted in the valve body structure axial bore for controlling the flow of air through the two passageways, and it has an upper and a lower, conical annular, valve member element, which alternately seat on a circular sharp edged valve seat and an angled valve seat, respectively.