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:
Dec. 03, 1985
Filed:
Sep. 06, 1984
Applicant:
Inventor:
Jan Ramisch, Fislisbach, CH;
Assignee:
BBC Brown, Boveri & Company Limited, Baden, CH;
Primary Examiner:
Int. Cl.
CPC ...
F16K / ;
U.S. Cl.
CPC ...
251 58 ; 251279 ; 251305 ; 251308 ;
Abstract
Butterfly valve actuated by a servo-motor, opening taking place by means of hydraulic force and closing by means of spring force. The hydraulic force must overcome the torque due to the flow, and the force of the closing spring. The excess hydraulic force of the servo-motor (2) during the end phase of the opening procedure is stored (3) and released during the closing procedure, whereby the closing time (t) can be minimized.