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:
Mar. 25, 2003
Filed:
Feb. 14, 2001
Applicant:
Inventor:
John Gagliardi, Clairton, PA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 4/300 ; E21B 3/406 ; F04B 2/500 ; F04F 1/06 ;
U.S. Cl.
CPC ...
E21B 4/300 ; E21B 3/406 ; F04B 2/500 ; F04F 1/06 ;
Abstract
A multi-stage liquid elevator which is assembled from individual stages is a fabricated from ordinary pipe components and has no moving parts. Each elevator stage consists of a reservoir defined by a casing enclosing an inlet pipe and an outlet pipe. A coupling connects any two stages of the elevator together. As many stages as required can be joined together to construct a multi-stage liquid elevator of any desired length. Each stage is fabricated to a length compatible with the available gas pressure. Enough pressure must be available to move a column of liquid a vertical distance equal to or greater than the length of one stage of the elevator.