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. 18, 2012
Filed:
Mar. 09, 2010
Christopher Gruber, Cincinnati, OH (US);
David O. Shumate, Lawrenceburg, IN (US);
James W. Happe, Jr., Cincinnati, OH (US);
Steven R. Salmons, Saint Louis, MO (US);
Jeffrey P. Vanhorn, Saint Louis, MO (US);
Christopher Gruber, Cincinnati, OH (US);
David O. Shumate, Lawrenceburg, IN (US);
James W. Happe, Jr., Cincinnati, OH (US);
Steven R. Salmons, Saint Louis, MO (US);
Jeffrey P. VanHorn, Saint Louis, MO (US);
Campbell Hausfeld/Scott Fetzer Company, Harrison, OH (US);
Abstract
An apparatus includes a valve housing having an inlet port, a first chamber with a first outlet port, and a second chamber with a second outlet port. A first valve opens between the inlet port and the first chamber under a first level of pneumatic pressure at the inlet port. A second valve opens between the first chamber and the second chamber under a second, greater level of pneumatic pressure in the first chamber. A third valve opens between the second chamber and the first chamber under a third level of pneumatic pressure in the second chamber, with the third level being less than the first level.