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. 21, 2003
Filed:
Feb. 13, 2002
Applicant:
Inventor:
Rory Britz, Kaufering, DE;
Assignee:
Hilti Aktiengesellschaft, Schaan, LI;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04B 5/300 ;
U.S. Cl.
CPC ...
F04B 5/300 ;
Abstract
A piston pump comprised of a cylinder ( ), an automatically closing intake valve ( ) to a pump chamber ( ), a sealing reciprocating piston ( ) and a sealing upstream filter piston ( ), wherein the piston ( ) together with the filter piston ( ) are elastically spring-biased and axially limitedly moveable and form together with the filter piston ( ) an automatically closing discharge valve ( ).