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:
Jun. 11, 1991
Filed:
Mar. 03, 1989
Applicant:
Inventor:
Brian W Engelbach, Columbus, OH (US);
Assignee:
Therm-O-Disc, Incorporated, Mansfield, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05D / ;
U.S. Cl.
CPC ...
137495 ; 13750541 ;
Abstract
A bubbler valve has a metering flow control poppet that is pressure imbalanced in the closed direction. The poppet is selectively yieldably biased open by a spring, and inlet pressure acting on the poppet in opposition to the spring adjusts the open position of the poppet.