Rotating pump

a technology of rotating pump and sealing mechanism, which is applied in the direction of rotary/oscillating piston pump components, machines/engines, liquid fuel engines, etc., can solve the problems of inability to ensure the durability of sealing mechanism, lack of sealing ability of sealing mechanism, and inability of pump to have the required endurance against the discharge of brake fluid, etc., to ensure the stability of sealing gap, reduce the risk of resinous member breakage, and increase the effect of pressur
US20150226212A1Inactive Publication Date: 2015-08-13ADVICS CO LTD
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
ADVICS CO LTD
Publication Date
2015-08-13
Estimated Expiration
Not applicable · inactive patent

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Abstract

A rotating pump includes an outer and an inner rotor disposed in a casing with a gap between the casing and the outer rotor. The rotating pump also includes a first and a second sealing member in the casing to define a low-pressure region and a high-pressure region within the gap. Each of the first and second sealing members is made up of a seal functioning portion and an elastically pressing portion. The seal functioning portion includes a resinous member and a deformation-suppressing member. The resinous member contacts the outer rotor and a low-pressure side inner surface of the casing to establish a difference in pressure between the low-pressure region and the high-pressure region. The deformation-suppressing member works to stop the resinous member from deforming undesirably. This minimizes the risk of breakage of the resinous member and enables the rotating pump to discharge the fluid at an increased pressure.
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Description

[0001] The present application claims the benefit of priority of Japanese Patent Application No. 2014-22442 filed on Feb. 7, 2014, the disclosure of which is incorporated herein by reference.BACKGROUND OF THE INVENTION

[0002] 1.Technical Field of the Invention

[0003] This disclosure relates generally to a rotating pump designed to suck and then discharge fluid, and more particularly to such a rotating pump which is useful for a brake system working to suck and discharge brake fluid to regulate the pressure thereof for controlling the braking force.

[0004] 2. Background Art

[0005] Japanese Patent First Publication No. 2002-295376 teaches use of an internal gear pump, such as a trochoid pump, as a rotating pump for an automotive brake system. This type of rotating pump is made up of an inner rotor, an outer rotor, and a casing. The inner rotor is equipped with outer teeth formed on an outer periphery thereof. The outer rotor is equipped with inner teeth formed on an inner periphery thereof. Th...

Claims

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