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. 02, 1982
Filed:
Aug. 22, 1979
Applicant:
Inventor:
John R Tippetts, Sheffield, GB;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F15C / ;
U.S. Cl.
CPC ...
137821 ; 137809 ; 137810 ;
Abstract
For achieving a shut-off function, a mainstream communicates with a control stream into which an outlet for the mainstream opens laterally. By reciprocating the control stream back and forth across the outlet, for example by alternate pressurisation of reservoirs to which the control stream is connected at its ends, access of the mainstream to the outlet is inhibited. When the reciprocation is discontinued full flow of the mainstream to or through the outlet can take place.