Fluid pump

• US 7,255,541 B2
• Filed: 09/08/2003
• Issued: 08/14/2007
• Est. Priority Date: 09/10/2002
• Status: Expired due to Fees

• Current Assignee: Kabushiki Kaisha Toyota Jidoshokki (Toyota Motor Corporation)
• Original Assignee: Kabushiki Kaisha Toyota Jidoshokki (Toyota Motor Corporation)
• Inventors: Kawaguchi, Masahiro, Kuramoto, Satoru, Hoshino, Nobuaki, Yamamoto, Shinya, Kuwahara, Mamoru
• Primary Examiner(s): Tyler; Cheryl
• Assistant Examiner(s): DWIVEDI, VIKANSHA S
• Application Number:
  US10/658,443
• Publication Number:
  US 20040126255A1
• Time in Patent Office: 1,436 Days
• Field of Search: 417/410.3
• US Class Current: 417/410.3
• CPC Class Codes: F04C 18/126 with radially from the rotor body extending elements, not necessarily co-operating with corresponding recesses in the other rotor, e.g. lobes, Roots type
• CPC Class Codes: F04C 2220/10 Vacuum
• CPC Class Codes: F04C 2220/30 Use in a chemical vapor deposition [CVD] process or in a similar process
• CPC Class Codes: F04C 2230/80 Repairing methods
• CPC Class Codes: F04C 2270/08 Amplitude of electric current
• CPC Class Codes: F04C 2270/701 Cold start
• CPC Class Codes: F04C 23/00 Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids F04C25/00 takes precedence
• CPC Class Codes: F04C 28/06 specially adapted for stopping, starting, idling or no-load operation
• CPC Class Codes: F04C 29/0042 Driving elements, brakes, couplings, transmissions specially adapted for pumps brakes, couplings, transmissions per se F16, B60

Abstract

A fluid pump includes a housing, a drive source, a rotary unit and a pumping mechanism. The drive source is accommodated in the housing and includes a rotary member for rotation. The rotary unit includes the rotary member and a rotary shaft, which is operatively connected to the rotary member for rotation. The rotary unit forming an engaging portion for engaging with a maintenance tool which is prepared outside the housing. The pumping mechanism is placed in the housing and is operated in accordance with the rotation of the rotary shaft. An allowing means is formed in the housing for allowing the maintenance tool to engage with the engaging portion so as to face the engaging portion. The rotary shaft is rotated by rotating the maintenance tool in a state that the maintenance tool is engaged with the engaged portion.

Claims

1. A fluid pump comprising:

a housing;

a drive source accommodated in the housing, the drive source including a rotary member for rotation;

a rotary unit including the rotary member and a rotary shaft, which is operatively connected to the rotary member for rotation, the rotary unit forming an engaging portion for engaging with a maintenance tool which is prepared outside the housing; and

a pumping mechanism placed in the housing, the pumping mechanism being operated in accordance with the rotation of the rotary shaft;

wherein an allowing means is formed in the housing for allowing the maintenance tool to engage with the engaging portion so as to face the engaging portion, the rotary shaft being rotated by rotating the maintenance tool in a state that the maintenance tool is engaged with the engaged portion, the allowing means includes an intermediate member that is pivotally places on the housing, the intermediate member being capable of contacting with and moving from the engaging portion and the maintenance tool, the maintenance tool and the rotary member where the engaging portion is formed are connected to each other through the intermediate member so as to integrally rotate by pushing the intermediate member toward an inside of the housing with the maintenance tool.

2. The fluid pump according to claim 1, wherein the drive source is an electric motor.

3. The fluid pump according to claim 1, wherein the engaging portion is formed in the rotary member.

4. The fluid pump according to claim 1, wherein the rotary member is an output shaft.

5. The fluid pump according to claim 1, wherein the engaging portion is a hexagon socket.

6. The fluid pump according to claim 1, wherein the maintenance tool is a hexagon wrench.

7. The fluid pump according to claim 1, wherein the allowing means is a tool insertion hole for allowing the maintenance tool to be inserted into the housing, in which a tool insertion hole opening and closing means is formed for opening and closing the tool insertion hole.

8. The fluid pump according to claim 7, wherein the tool insertion hole opening and closing means is a sealing bolt.

9. The fluid pump according to claim 1, further comprising a cover having its outside, the housing being built in the cover, a through hole being formed in the cover for allowing the maintenance tool to reach the allowing means from the outside so as to face the allowing means, a through hole opening and closing means being formed in the cover for opening and closing the through hole.

10. The fluid pump according to claim 9, wherein the through hole opening and closing means is a grommet.

11. The fluid pump according to claim 1, wherein the housing has a pumping mechanism side and a drive source side therein, the rotary member being an output shaft which constitutes the drive source, the output shaft and the rotary shaft having a power transmission path therebetween inclusive of the output shaft and the rotary shaft, the fluid pump further comprising a shaft seal device in the power transmission path for blocking communication between atmosphere of the pumping mechanism side and atmosphere of the drive source side, the engaging portion being formed in the output shaft.

12. The fluid pump according to claim 11, wherein the shaft seal device is a lip seal.

13. The fluid pump according to claim 1, wherein fluid handled by the pumping mechanism is gas reaction product generated by a semiconductor machining apparatus.

14. The fluid pump according to claim 13, wherein the gas reaction product is ammonium chloride.

15. A fluid pump comprising:

a housing;

a drive source accommodated in the housing, the drive source including a rotary member for rotation;

a rotary unit including the rotary member and a rotary shaft, which is operatively connected to the rotary member for rotation, the rotary unit forming an engaging portion for engaging with a maintenance tool which is prepared outside the housing; and

a pumping mechanism placed in the housing, the pumping mechanism being operated in accordance with the rotation of the rotary shaft;

wherein an allowing means is formed in the housing for allowing the maintenance tool to engage with the engaging portion so as to face the engaging portion, the rotary shaft being rotated by rotating the maintenance tool in a state that the maintenance tool is engaged with the engaged portion, wherein the allowing means is a tool insertion hole for allowing the maintenance tool to be inserted into the housing, in which a tool insertion hole opening and closing means is formed for opening and closing the tool insertion hole.

16. The fluid pump according to claim 15, wherein the tool insertion hole opening and closing means is a sealing bolt.

17. A fluid pump comprising:

a housing;

a drive source accommodated in the housing, the drive source including a rotary member for rotation;

a rotary unit including the rotary member and a rotary shaft, which is operatively connected to the rotary member for rotation, the rotary unit forming an engaging portion for engaging with a maintenance tool which is prepared outside the housing;

a pumping mechanism placed in the housing, the pumping mechanism being operated in accordance with the rotation of the rotary shaft;

an allowing means formed in the housing for allowing the maintenance tool to engage with the engaging portion so as to face the engaging portion, the rotary shaft being rotated by rotating the maintenance tool in a state that the maintenance tool is engaged with the engaged portion; and

a cover having its outside, the housing being built in the cover, a through hole being formed in the cover for allowing the maintenance tool to reach the allowing means from the outside so as to face the allowing means, a through hole opening and closing means being formed in the cover for opening and closing the through hole.

18. The fluid pump according to claim 17, wherein the through hole opening and closing means is a grommet.