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. 04, 1992
Filed:
Sep. 12, 1988
Applicant:
Inventor:
Yukio Mitsuhisa, Yokohama, JP;
Assignee:
Tosoh Corporation, Yamaguchi, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
422 99 ; 422101 ; 1371704 ; 137205 ; 55178 ; 141 65 ;
Abstract
A liquid drain trap device of negative-pressure relay type, which comprises a vertically-elongated hollow container, a liquid drain pipe connected to the side wall of the container and negative-pressure suction device provided in an upper side of the container so as to maintain the interior of the container under a negative pressure and exert a suction force to drain the liquid through the pipe, the liquid drain pipe being made of fluorine resin material at least at its end section projecting into the interior of the container.