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:
Jan. 10, 2006
Filed:
Nov. 01, 2001
Applicant:
Per Olav Haughom, Tonstad, NO;
Inventor:
Per Olav Haughom, Tonstad, NO;
Assignee:
Other;
Primary Examiner:
Int. Cl.
CPC ...
F16J 15/40 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method and device for forming a sliding seal between a reciprocating piston () and the wall of a cylinder (), wherein one side of the piston faces a first liquid in a pump chamber () of the cylinder (), a first piston seal () and a second piston seal (), spaced from the first piston seal (), sealing between the piston and the cylinder (); and wherein a second liquid is supplied under pressure between the seals (), the pressure of the second liquid between the seals () being maintained at a level essentially equal to or slightly lower than the pressure of the pump chamber ().