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1. 发明专利

JPH09328197A PUMP UNIT FOR OIL-SUPPLY DEVICE 失效
公开(公告)号：JPH09328197A
公开(公告)日：1997-12-22
申请号：JP14559596
申请日：1996-06-07
申请人： TATSUNO CO LTD
发明人： OTAKI TSUTOMU , NAKANISHI NORIYUKI
IPC分类号： B67D7/66 , B67D5/48
摘要： PROBLEM TO BE SOLVED: To prevent vibration and noise caused by the pulsating motion of a pump without increase of the weight, by providing a pumping part in a main body and forming a volute part installing a volute chamber and a filter part adjacent to the volute part so as to make cylindrical bodies and providing ribs in the filter part. SOLUTION: The upper end of the flow passage forming in the passage extending upward from a pump part 33 installed in the main body 30 of a pumping unit reaches the cylindrical volute part 36 forming a volute chamber. A cylindrical filter part 37 installed adjacently to the volute part 36 in the horizontal direction to contain the filter in the inside is reinforced by ribs R. A bypass valve part 39 containing a bypass valve connecting the filter chamber in the filter part 37 and the passage 7 at the pump inlet side, is a screw-in type and it is installed between the pump part 33 in the main body 30 and the filter part 37. Since pulsatory motions are not generated even if the wall is thin, owing to the ribs provided in the filter particularly having a large radius, the material can be reduced and a sturdy pumping part without pulsation can be obtained.

2. 发明专利

JPH08324699A STRUCTURE OF GAS-LIQUID SEPARATOR OF PUMPING DEVICE 失效
公开(公告)号：JPH08324699A
公开(公告)日：1996-12-10
申请号：JP14022395
申请日：1995-06-07
申请人： TATSUNO CO LTD
发明人： SAKUMA KUNIO , TANAKA AKIRA , NAKANISHI NORIYUKI , MATSUMOTO KAZUNARI
IPC分类号： B67D7/76 , B01D19/00 , B67D5/58
摘要： PURPOSE: To increase the capacity of a gas-liquid separator and miniaturize it, by making a small hole for flowing-out of the gas-liquid mixture stream on the wall face closing one end of a voltex chamber, and connecting the other end thereof to a strainer chamber and providing a cylindrical member connected to the vortex chamber in the strainer chamber. CONSTITUTION: The pressurized oil by a pump 6 is led from the flow pass 8 of the exit side to the vortex chamber 10 of the gas-liquid separator 9 to generate a vortex flow. The gas-liquid mixture flows from the small hole 13a to the float chamber 21 through a flow pass 20. In this time, since a flange 12a serving as a preventive member against rotation thereof is provided at the downstream side of the cylindrical member 11, the capacity of gas-liquid separation is increased. Oil bearing no gas passes a strainer 14 and opens the control valve 18 and flows to the discharge opening 0. The mixture led in the float chamber 21 is separated to gas and liquid and the gas is discharged to the outside from an air-vent V. When a certain volume of oil is retained in the float chamber 21, the float valve 22 is opened and the oil is returned back from the flow pass 23 to the underground tank through a strainer 2.

3. 发明专利

JPH09324766A GEAR PUMP 失效
公开(公告)号：JPH09324766A
公开(公告)日：1997-12-16
申请号：JP14543296
申请日：1996-06-07
申请人： TATSUNO CO LTD
发明人： OTAKI TSUTOMU , NAKANISHI NORIYUKI
IPC分类号： F04D29/70 , F04C2/10
摘要： PROBLEM TO BE SOLVED: To prevent biting of bearing by maintaining the pressure in a back pressure chamber of a gear pump properly and discharging foreign matters in oil by using the flow. SOLUTION: A clearance S2 is formed between a wheel gear 53 and an end of a pump casing 50 opposite to a boss portion 50a, and a spiral groove 70 is formed at an inner peripheral wall 62a of a bearing 62 to discharge oil in a back pressure chamber 60 via the spiral groove 70.

4. 发明专利

JPH08326665A INFLOW PASSAGE STRUCTURE OF PUMP DEVICE 失效
公开(公告)号：JPH08326665A
公开(公告)日：1996-12-10
申请号：JP13381595
申请日：1995-05-31
申请人： TATSUNO CO LTD
发明人： TANAKA AKIRA , NAKANISHI NORIYUKI , MATSUMOTO KAZUNARI
IPC分类号： F04B53/06 , F04B53/10 , F04B53/16 , F04B53/20
摘要： PURPOSE: To facilitate the mounting of a strainer so as to minimize an outflow of oil at the time of cleaning. CONSTITUTION: A horizontal strainer chamber I is arranged through an inflow passage I vertically formed from below a strainer casing C1, a seat 1a is formed on the flow-in passage I side so that the terminal plate side of a strainer 2 whose opening 2b makes contact with the seat 1a is pressed by means of a lid 3 so as to bring the opening in close contact with the seat 1a.

5. 发明专利

JPH08319957A PUMP DEVICE FOR METER 失效
公开(公告)号：JPH08319957A
公开(公告)日：1996-12-03
申请号：JP12465295
申请日：1995-05-24
申请人： TATSUNO CO LTD
发明人： TANAKA AKIRA , NAKANISHI NORIYUKI , MATSUMOTO KAZUNARI
IPC分类号： F04B53/20
摘要： PURPOSE: To provide a pump device for a meter to prevent outflow of oil gathering in a casing during cleaning and exchange of a strainer on the inflow side and prevent filling of a float chamber with oil. CONSTITUTION: The inflow port I of a casing C is communicated with the inner side 3 of a strainer 2 and the outside chamber 4 of the strainer 2 is communicated with the chamber 7 on the inlet side of a pump 6 through a check valve 5, and the outlet passage 23 of the float chamber 21 is communicated with the chamber 4 on the outside of the strainer 2.

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