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. 11, 1978
Filed:
May. 24, 1976
Applicant:
Inventors:
Viktor Arsentievich Tatkov, Novokuznetsk Kemerovskoi oblasti, SU;
Nikolai Nikolaevich Letov, Novokuznetsk Kemerovskoi oblasti, SU;
Boris Nikolaevich Sharapov, Yasnogorsk Tulskoi oblasti, SU;
Vladimir Petrovich Rozhkov, Yasnogorsk Tulskoi oblasti, SU;
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01D / ; F04D / ;
U.S. Cl.
CPC ...
415113 ; 4151 / ; 4151991 ; 277-3 ;
Abstract
A pump for handling liquids laden with abrasive particles in which the seal of the shaft between the low- and high-pressure stages comprises at least two floating rings provided on the shaft in a circular gap between the shaft and the casing. The casing has a circular collar at the side of the low-pressure stage, partly covering the circular gap which is adjoined by the rings during pump operation.