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:
May. 14, 2013
Filed:
Mar. 21, 2012
Robert Nathan, Backnang, DE;
Juergen Erdmann, Schorndorf-Weiler, DE;
Sven Dirnberger, Steinheim, DE;
Robert Nathan, Backnang, DE;
Juergen Erdmann, Schorndorf-Weiler, DE;
Sven Dirnberger, Steinheim, DE;
Alfred Kaercher GmbH & Co. KG, Winnenden, DE;
Abstract
A pump for a high-pressure cleaning apparatus for delivering cleaning liquid is provided. The pump has at least one pump chamber into which at least one reciprocally movable piston plunges. The pump chamber is connected via at least one inlet valve to a suction conduit and via at least one outlet valve to a pressure conduit. A bypass conduit leads from the pressure conduit to the suction conduit. A bypass valve is arranged in the bypass conduit. The valve body of the bypass valve is connected to a control member which displaces the valve body to a closed or an open position and displaces a switch plunger which is coupled to the valve body to a first or a second switch position. The valve body opens a passage upstream of the valve seat which becomes wider when the valve body is at a predetermined distance from the valve seat.