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. 14, 1984
Filed:
Oct. 29, 1981
Applicant:
Inventors:
Assignee:
Tokyo Shibaura Denki Kabushiki Kaisha, Kanagawa, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F03B / ;
U.S. Cl.
CPC ...
415112 ; 415-1 ; 415500 ;
Abstract
In a multistage hydraulic machine of the type having a main shaft supporting a plurality of runners ranging from a highest pressure stage to a lowest pressure stage, at least one set of adjustable wicket gates provided for the highest pressure stage runner, a draft tube connected to a lower end of the lowest pressure stage runner, and devices for supplying and exhausting compressed air into and out of the pressure stages upon closure of the wicket gates, there is provided an air exhausting device including an air exhausting passage opening in a runner-cone portion of the lowest pressure stage runner.