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. 25, 2003
Filed:
Apr. 24, 2002
Nippon Sanso Corporation, Tokyo, JP;
Abstract
There is provided a gas supplying apparatus capable of rapidly switching the gas to be supplied to an instrument and preventing reactive gases from mixing each other. The gas supplying apparatus comprises: a 4-way block valve which is a main switching valve , having two inflow ports and two outflow ports ; an instrument connection passage connected to an instrument, such as an analyzer, to which the outflow ports is connected; an exhaust passage to which the two outflow ports is connected; common gas supplying passages respectively connected to the two inflow ports of the 4-way block valve; a switching valve(s) made of a 2-connected 3-way block valve(s) or a 4-way block valve(s) connected to the at least one of the two common gas supplying passages ; and two gas supplying passages switchably connected the 2-connected 3-way block valve(s) or the 4-way block valve(s).