Title:
GEAR PUMP OR MOTOR
Document Type and Number:
Japanese Patent JP3915223
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To reduce a noise and a vibration by reducing the pressure variation width of the oil enclosed in filing space, without hurting the compact property, in a gear pump or a motor.
SOLUTION: In a gears 1 respectively, an additional machining is applied to the position to a tooth bottom 21 between neighboring tooth 2 and tooth 2, a space expanding groove 3 to be recess along near one side end of the gear 1, to near the other side end is provided, and the volume variation ratio of the filing space AR is reduced relatively by increasing the volume of the space AR, so as to reduce the pressure variation width of the oil enclosed in the filing space AR.
Inventors:
Koji Komatsu
Application Number:
JP1401098A
Publication Date:
May 16, 2007
Filing Date:
January 27, 1998
Export Citation:
Assignee:
SHIMADZU CORPORATION
International Classes:
F04C2/18; F03C2/08; F15B15/08; (IPC1-7): F04C2/18; F04C2/18; F03C2/08
Foreign References:
| US3701692 |
Attorney, Agent or Firm:
Kazuhiro Akazawa
Previous Patent: LIFT FOR NURSING
Next Patent: RADIO TELEPHONE SET HAVING AUTOMATIC ANSWERING FUNCTION
Next Patent: RADIO TELEPHONE SET HAVING AUTOMATIC ANSWERING FUNCTION