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. 09, 1977
Filed:
Feb. 17, 1976
Applicant:
Inventors:
Kenzi Sekido, Hitachi, JA;
Tsugio Yoshikawa, Hitachi, JA;
Assignee:
Hitachi, Ltd., Tokyo, JA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B23B / ;
U.S. Cl.
CPC ...
415-9 ; 64 2 / ; 415 36 ; 415155 ;
Abstract
In a wicket gate protecting device for hydraulic machines, a pair of link plates transmitting a force between a gate control ring and a gate lever, is connected to the gate lever through a shear pin. The gate lever disposed between the link plates, and rotatably supported about the shear pin. When the movement of the wicket gate is restricted by obstacles entered between adjacent gate vanes, the shear pin is cut and a part of the shear pin supporting the gate lever moves along between the link plates for a distance and is stopped by friction between the link plates and the shear pin, thereby preventing damage to the neighboring gate vanes.