US2004213683A1PendingUtilityA1

Water pump

45
Assignee: AISIN SEIKIPriority: Apr 23, 2003Filed: Apr 22, 2004Published: Oct 28, 2004
Est. expiryApr 23, 2023(expired)· nominal 20-yr term from priority
Inventors:Yojiro KogaAkihiro KatsumataItsuro HashiguchiTakumi HattoriYasuo Ozawa
A01K 61/10F04D 29/669F04D 29/043A01K 61/50E02B 3/14F01P 5/10
45
PatentIndex Score
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Cited by
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Claims

Abstract

A water pump includes a driven portion, a shaft including a hollow portion for rotating with the driven portion as a unit, an impeller rotating with the shaft as a unit, a body including a cylindrical supporting portion inserted by the shaft, a bearing provided between an external peripheral surface of the supporting portion and an internal peripheral surface of the driven portion for rotatably supporting the driven portion, and a mechanical seal sealing one side of a cylindrical space defined between an external peripheral surface of the shaft and an internal peripheral surface of the supporting portion, wherein a vibration absorption member is provided in the hollow portion of the shaft.

Claims

exact text as granted — not AI-modified
What we claim is:  
     
         1 . A water pump comprising: 
 a driven portion;    a shaft including a hollow portion for rotating with the driven portion as a unit;    an impeller rotating with the shaft as a unit;    a body including a cylindrical supporting portion inserted by the shaft;    a bearing provided between an external peripheral surface of the supporting portion and an internal peripheral surface of the driven portion for rotatably supporting the driven portion; and    a mechanical seal sealing one side of a cylindrical space defined between an external peripheral surface of the shaft and an internal peripheral surface of the supporting portion;    wherein a vibration absorption member is disposed in the hollow portion of the shaft.    
     
     
         2 . A water pump according to  claim 1 , wherein the vibration absorption member is made of an elastic material.  
     
     
         3 . A water pump according to  claim 1 , wherein the vibration absorption member includes pores in its body.  
     
     
         4 . A water pump according to  claim 1 , wherein the vibration absorption member having a predetermined size is pushed to place it into the hollow portion of the shaft from an opening portion thereof.  
     
     
         5 . A water pump according to  claim 2 , wherein the vibration absorption member is formed by injection molding of softened elastic material into the hollow portion of the shaft from an opening portion thereof.

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