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:
Aug. 11, 2020
Filed:
Oct. 03, 2016
Sumitomo Rubber Industries, Ltd., Kobe-shi, Hyogo, JP;
Nakata Engineering Co., Ltd., Kobe-shi Hyogo, JP;
Hiroyuki Onimatsu, Kobe, JP;
Nozomu Nishioka, Kobe, JP;
Hiroshi Ihara, Kobe, JP;
Noboru Ishihara, Kobe, JP;
Naoyasu Nakao, Kobe, JP;
SUMITOMO RUBBER INDUSTRIES, LTD., Kobe-shi, Hyogo, JP;
NAKATA ENGINEERING CO., LTD., Kobe-shi, Hyogo, JP;
Abstract
In a gear pump device for rubber extrusion, prolongation of the maintenance intervals is intended by preventing rubber scorch occurring at the gear support-shaft portion. It has a bushing ringinserted in a gear-housing boreof a housing. The bushing ringrotatably supports a support-shaft portionof a gearaccommodated in the gear-housing bore. The bushing ringhas a bearingand a sealing meansbuilt-in. The sealing meansincludes a seal ringof which cross section is ]-shaped and which has a first lip portioncontacting with the outer peripheral surface of the support-shaft portion, a second lip portiondisposed outside thereof in the radial direction, and a side wall portionconnecting between outer ends in the axial direction, of the first and second lip portions