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:
Oct. 28, 2025
Filed:
Nov. 26, 2024
Applicant:
Q.e.d. Environmental Systems, Inc., Dexter, MI (US);
Inventors:
Michael K. Lindquist, Plymouth, MI (US);
Hunter C. Anstadt, Ann Arbor, MI (US);
Mark T. Weinberger, Mounds View, MN (US);
William C. Allen, Iii, Ypsilanti, MI (US);
Assignee:
Graco Minnesota Inc., Minneapolis, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04F 1/08 (2006.01); E21B 43/12 (2006.01); F04B 47/04 (2006.01); F04B 53/10 (2006.01); B09B 1/00 (2006.01); F16K 31/20 (2006.01);
U.S. Cl.
CPC ...
F04F 1/08 (2013.01); E21B 43/121 (2013.01); E21B 43/129 (2013.01); F04B 47/04 (2013.01); B09B 1/006 (2013.01); F16K 31/20 (2013.01);
Abstract
A landfill well pump is pneumatically powered to pump landfill liquid from a landfill well. The landfill well pump includes a choke on the pneumatic exhaust of the pump. The choke regulates flow the driving gas out of the landfill pump, maintaining pneumatic pressure in the pump and metering inflow of landfill liquid into the pump.