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:
Dec. 27, 1977
Filed:
Oct. 17, 1975
Applicant:
Inventors:
Gerald Hofer, Weissach-Flacht, DT;
Gunter Bofinger, Vaihingen, Enz, DT;
Heinz Nothdurft, Stuttgart, DT;
Mohammad-Ali Khosrawi, Stuttgart, DT;
Helmut Simon, Goppingen, DT;
Karl Konrath, Ludwigsburg, DT;
Assignee:
Robert Bosch GmbH, Stuttgart, DT;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04B / ; F02M / ;
U.S. Cl.
CPC ...
417493 ; 1231 / ; 417500 ;
Abstract
The pump piston in a fuel injection pump is provided with longitudinal grooves which provide communication between the pressure chamber and the fuel supply chamber. An annular groove on the pump piston connects the longitudinal grooves so that communication between the pressure chamber and the fuel supply chamber is interrupted only after onset of the axial pressure stroke regardless of prior piston rotation.