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:
Jun. 16, 1981
Filed:
Nov. 08, 1979
Applicant:
Inventor:
Teunis Visser, Sliedrecht, NL;
Assignee:
IHC Holland N.V., Rotterdam, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16J / ; F16J / ;
U.S. Cl.
CPC ...
277 53 ; 277-3 ; 277135 ; 277203 ;
Abstract
The present invention relates to a seal of a shaft being rotatable relative to a stationary housing, said shaft being provided with a groove (3, 13), said groove being spiraled such that during rotation of the shaft the groove will pump fluid from the high-pressure side towards the low-pressure side. The shaft portion provided with the helical groove coacts with an abutting flexible sleeve (6) so that the amount of fluid which is allowed to escape in a controlled manner can be determined.