# US 8,770,953 B2 · Motor driven fluid pump > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,770,953 B2 - Document ID: US8770953B2 - Status: Granted - Kind: B2 - Application number: 13/174,498 - Filed: 2011-06-30 - Published: 2012-05-17 - Granted: 2014-07-08 - Earliest claimed: 2010-11-15 - Assignees: Hyundai Motor Company; Kia Motors Corporation - Applicants: Seungyong Lee; Chimyung Kim; Haengjin Ko; Harkkoo Kim; Yunseok Kim; Yongsun Park - Inventors: Seungyong Lee; Chimyung Kim; Haengjin Ko; Harkkoo Kim; Yunseok Kim; Yongsun Park - Web page: https://patentgrep.com/patent/US8770953B2 ## CPC - F04B 35/04: the means being electric - F04B 17/03: driven by electric motors - F04B 39/06: Cooling; Heating; Prevention of freezing - F04B 53/08: Cooling; Heating; Preventing freezing - F04B: POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS (machines for liquids, or pumps, of rotary-piston or oscillating-piston type F04C; non-positive-displacement pumps F04D; pumping of fluid by direct contact of another fluid or by using inertia of fluid to be pumped F04F) ## Abstract Disclosed is a motor driven fluid pump (e.g., water pump) including a pump body having a motor chamber and a pump chamber; a bearing supporting a rotary shaft of a motor which extends from motor chamber to pump chamber in pump body; a mechanical seal disposed between rotary shaft of the motor and pump body and blocking motor chamber from pump chamber; a bearing guide integrally fixed to rotary shaft of the motor between bearing and mechanical seal; a fluidproof plate fixed to pump body to overlap bearing guide, perpendicular to rotary shaft of the motor; and a leachate exhaust aperture and a vapor exhaust aperture which are formed through pump body to communicate with the space between fluidproof plate and mechanical seal. ## Claims ### Claim 1 A motor driven fluid pump, comprising: a pump body having a motor chamber and a pump chamber; a bearing supporting a rotary shaft of a motor which extends from the motor chamber to the pump chamber, in the pump body; a mechanical seal disposed between the rotary shaft of the motor and the pump body and blocking the motor chamber and the pump chamber; a bearing guide integrally fixed to the rotary shaft of the motor, between the bearing and the mechanical seal; a fluidproof plate fixed to the pump body to overlap the bearing guide, perpendicular to the rotary shaft of the motor; and a leachate exhaust aperture and a vapor exhaust aperture formed in the pump body to communicate with a space between the fluidproof plate and the mechanical seal; wherein a plurality of air motion tips bending toward both sides of the fluidproof plate are alternately formed circumferentially on an inner circumference of the fluidproof plate. ### Claim 2 (depends on 1) The motor driven fluid pump as defined in claim 1, wherein the bearing guide is formed in a ring shape to hermetically cover the entire outer circumference of the rotary shaft of the motor, and the fluidproof plate is formed in a ring shape with an outer circumference fixed to the pump body and the inner circumference spaced apart from the rotary shaft of the motor. ### Claim 3 (depends on 2) The motor driven fluid pump as defined in claim 2, wherein a protruding seal rib is integrally formed on the fluidproof plate to seal the bearing guide, in the fluidproof plate. ### Claim 4 (depends on 2) The motor driven fluid pump as defined in claim 2, wherein tool grooves are formed at one side of the fluidproof plate to combine the fluidproof plate with the pump body by rotating the fluidproof plate, a female thread is formed on the pump body to thread-fasten the fluidproof plate by rotating the fluidproof plate, and a male thread is formed on the outer circumference of the fluidproof plate to be engaged with the female thread of the pump body. ### Claim 5 (depends on 2) The motor driven fluid pump as defined in claim 2, wherein the outer circumference of the fluidproof plate is fitted in the pump body, and the bearing guide is fitted on the rotary shaft of the motor. ### Claim 6 (depends on 1) The motor driven fluid pump as defined in claim 1, wherein the motor driven fluid pump is a water pump. ### Claim 7 An apparatus, comprising: a pump body having a drive chamber and a pump chamber; a bearing supporting a rotary shaft which extends from the drive chamber to the pump chamber, in the pump body; a mechanical seal disposed between the rotary shaft and the pump body and creating a fluidic separation between the drive chamber and the pump chamber; a bearing guide fixed to the rotary shaft, between the bearing and the mechanical seal; a fluidproof plate fixed to the pump body to overlap the bearing guide, perpendicular to the rotary shaft of a motor; and at least one exhaust aperture formed in the pump body to communicate with a space between the fluidproof plate and the mechanical seal; wherein a plurality of air motion tips bending toward both sides of the fluidproof plate are alternately formed circumferentially on an inner circumference of the fluidproof plate. ### Claim 8 (depends on 7) The apparatus as defined in claim 7, wherein the at least one exhaust aperture comprises at least one of either a leachate exhaust aperture or a vapor exhaust aperture. ### Claim 9 (depends on 7) The apparatus as defined in claim 7, wherein the bearing guide is formed in a ring shape to hermetically cover the entire outer circumference of the rotary shaft, and the fluidproof plate is formed in a ring shape with an outer circumference fixed to the pump body and an inner circumference spaced apart from the rotary shaft. ### Claim 10 (depends on 9) The apparatus as defined in claim 9, wherein a protruding seal rib is integrally formed on the surface opposite to the bearing guide to seal the bearing guide, in the fluidproof plate. ### Claim 11 (depends on 9) The apparatus as defined in claim 9, wherein the outer circumference of the fluidproof plate is fitted in the pump body, and the bearing guide is fitted on the rotary shaft. ### Claim 12 (depends on 7) The apparatus as defined in claim 7, wherein the apparatus is a motor driven pump and wherein the rotary shaft is driven by the motor. ### Claim 13 (depends on 7) The apparatus as defined in claim 7, wherein the apparatus is a water pump.