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:
Sep. 10, 1991
Filed:
Jan. 08, 1991
Applicant:
Inventor:
Robert E Fletcher, Vista, CA (US);
Assignee:
Air Products and Chemicals, Inc., Allentown, PA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
F04F / ;
U.S. Cl.
CPC ...
417138 ; 250577 ; 73223 ;
Abstract
A gas piston liquid flow controller comprising a pumping chamber of fixed volume, means to separately introduce into said chamber pressurized gas and liquid, means to detect the presence of liquid at predetermined upper and lower levels in said chamber, means to withdraw a stream of liquid from said chamber for delivery to a point of use and a controller to maintain liquid in said chamber to effect constant delivery of liquid to the point of use.