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. 06, 1979
Filed:
Oct. 07, 1977
Applicant:
Inventor:
Brian Snowdon, Doncaster, GB;
Assignee:
Macawber Engineering Limited, Doncaster, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16K / ;
U.S. Cl.
CPC ...
137242 ; 251144 ; 251172 ; 251298 ;
Abstract
A valve assembly for closing and sealing an inlet which is full of large granular dry material including a dome-like valve member mounted for rotation to open or close the inlet and a deformable resilient sealing ring which may be inflated by gas pressure to engage the valve member in its closed position to produce a gas-tight seal across the valve member, the sealing ring being arranged within the valve assembly to minimize abrasive wear on the ring from the granular material.