Title:
GEAR PUMP DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/235928
Kind Code:
A1
Abstract:
Provided is a gear pump device that enables improvement in volumetric efficiency and manufacturability, and also makes it possible to ensure sealing property and to reduce drive torque. According to the present invention, a sealing mechanism 111 is provided with an annular rubber member 113, an outer member 114, and an inner member 112, wherein: the inner member 112 has, at an end of an outer peripheral wall on the side of an inner gear 19b in the axial direction, a notch 112g which is recessed radially inward of the inner gear 19b so as to form, together with an axial one end face 19b1 of the inner gear 19b, a depressed part 1a; and the outer member 114 has an insertion part 114i which is disposed within the depressed part 1a and which abuts against the axial one end face 19b1 of the inner gear 19b so as to constitute a part of a sealing surface 114z on the other side.
Inventors:
USAMI TADAYOSHI (JP)
ANDO KUNIHITO (JP)
ANDO KUNIHITO (JP)
Application Number:
PCT/JP2018/023747
Publication Date:
December 27, 2018
Filing Date:
June 22, 2018
Export Citation:
Assignee:
ADVICS CO LTD (JP)
International Classes:
F04C2/10; F04C15/00
Foreign References:
| JP2016205339A | 2016-12-08 | |||
| JP2011021526A | 2011-02-03 | |||
| JPS32008843B1 | ||||
| US20100215538A1 | 2010-08-26 |
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