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:
Feb. 03, 1981
Filed:
Apr. 04, 1979
Werner R Bauer, Richmond, VA (US);
James T Candor, Washington Township, Montgomery County, OH (US);
Robertshaw Controls Company, Richmond, VA (US);
Abstract
A differential piston type reversing valve construction having a housing body provided with a high pressure chamber that has a valve member slideable therein for selectively interconnecting said high pressure chamber to either port of a pair of ports interrupting a valve seat of the housing body while interconnecting a low pressure port of the valve seat to the other port of the pair of ports, the valve member having a small piston member and a large piston member interconnected thereto and being disposed spaced from each other to define an intermediate chamber therebetween. The small piston member has one side thereof exposed to the high pressure chamber and the large piston member has one side thereof exposed to a control chamber of the housing body. The valve construction is provided with means for effectively interconnecting the high pressure chamber to the intermediate chamber and the low pressure port to the control chamber to cause the valve member to slide to one position thereof in the high pressure chamber. Such means is also adapted to effectively interconnect the high pressure chamber to the control chamber and the low pressure port to the intermediate chamber to cause the valve member to slide to another position thereof in the high pressure chamber, the construction having means for effectively disconnecting the low pressure port from the intermediate chamber while maintaining the interconnection between the high pressure chamber and the control chamber when the valve member is moved to the other position thereof.