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:
Oct. 14, 2014
Filed:
May. 19, 2010
Timothy Sean Roman, Minnetonka, MN (US);
Timothy Sean Roman, Minnetonka, MN (US);
Graco Minnesota Inc., Minneapolis, MN (US);
Abstract
The 4-way valve used to control the operation of a pneumatic motor can be pneumatically operated such as by a pilot valve. The pilot valve () works by creating a restriction at the high-pressure air/signal port () regardless of the pressure drop up-stream of the pilot valve () while still allowing for adequate flow once the valve () is actuated. An additional slide valve () is added to the pilot valve () that restricts the inletof the pilot valve () above the poppet valve () that creates a pressure drop, see FIG.. The extra pressure drop forces the valve () to snap open once the actuator pin () contacts the poppet valve () to create the hysteresis. Once the valve () snaps open, the slide valve () moves to uncover the high-pressure ports (), removing the restriction to ensure that the main 4-way () fully actuates.