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:
Jun. 12, 2001
Filed:
Jul. 14, 2000
Takashi Ejiri, Tokyo, JP;
Other;
Abstract
An automatic two-stage switching valve includes a valve stem which normally closes a fluid passage by a spring force; a cylinder adopted to accommodate the valve stem; a large flow rate piston and a small flow rate piston that are provided on the valve stem and are slidably fitted in the cylinder; a large flow rate pilot pressure chamber formed in the cylinder; a small flow rate pilot pressure chamber formed in the cylinder; a stopper adopted to restrict the movement of the small flow rate piston; a pilot pressure source adopted to apply the pilot pressure simultaneously to both the large and small flow rate pilot pressure chambers; and a restrictor provided in a connection passage that connects the pilot pressure source to the large flow rate pilot pressure chamber.