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:
Apr. 07, 1992
Filed:
Jan. 17, 1991
Applicant:
Inventor:
Gunther Spehr, Kornwestheim, DE;
Assignee:
Firma L'Orange GmbH, , DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04B / ; F04B / ;
U.S. Cl.
CPC ...
417490 ; 123509 ;
Abstract
A high-pressure pump with a plunger reciprocating in a cylinder has a cylindrical guide surface on the plunger chamber side of the inlet/outlet port and a cylindrical guide surface on the drive side of an axial chord of 0.05 to 0.5 times the plunger diameter. This provides an advantage in that under high pump pressure the plunger emerges from the guide surface so that the plunger surface areas exposed to unilateral side forces are reduced. This prevents the plunger from canting and possibly seizing on the cylinder wall.