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:
Aug. 13, 1991
Filed:
Nov. 28, 1989
Applicant:
Inventors:
Yasuhide Kimura, Kitakyushu, JP;
Takeshi Motohashi, Kitakyushu, JP;
Yukihiro Fujishima, Kitakyushu, JP;
Assignee:
Toto Ltd., Fukuoka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05D / ;
U.S. Cl.
CPC ...
13750518 ; 137606 ;
Abstract
Device for preventing water hammer while regulating water pressure includes valve element biasing means which substantially consists of a pressure adjusting spring with a small spring constant and a water hammer preventing spring with a large spring constant which are disposed in series in a valve casing. The valve element biasing means is capable of varying the opening area of a communicating passage between an upstream passage and a downstream passage to as to adjust the pressure in the communicating passage while preventing the occurrence of water hammer in piping water supply equipment.