EP1199475A3 - Vacuum pump - Google Patents

Vacuum pump Download PDF

Info

Publication number
EP1199475A3
EP1199475A3 EP01124518A EP01124518A EP1199475A3 EP 1199475 A3 EP1199475 A3 EP 1199475A3 EP 01124518 A EP01124518 A EP 01124518A EP 01124518 A EP01124518 A EP 01124518A EP 1199475 A3 EP1199475 A3 EP 1199475A3
Authority
EP
European Patent Office
Prior art keywords
valve hole
guide pipe
hole forming
forming body
valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP01124518A
Other languages
German (de)
French (fr)
Other versions
EP1199475A2 (en
Inventor
Shinya Yamamoto
Yuji Hashimoto
Hitoshi Shoji
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Industries Corp
Original Assignee
Toyota Industries Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyota Industries Corp filed Critical Toyota Industries Corp
Publication of EP1199475A2 publication Critical patent/EP1199475A2/en
Publication of EP1199475A3 publication Critical patent/EP1199475A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/06—Silencing
    • F04C29/065—Noise dampening volumes, e.g. muffler chambers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C18/126—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with radially from the rotor body extending elements, not necessarily co-operating with corresponding recesses in the other rotor, e.g. lobes, Roots type

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Check Valves (AREA)

Abstract

Passage structure for a vacuum pump has a flange, a muffler, a valve hole forming body, a guide pipe and an exhaust pipe. The flange is coupled to the muffler. The muffler is detachably fitted into the valve hole forming body. The valve hole forming body is detachably fitted into the guide pipe. The exhaust pipe is coupled to the guide pipe via the valve hole forming body. Each flange of the muffler, the valve hole forming body and the guide pipe is screw-on all together. A backflow preventing means is constituted of the guide pipe, the valve hole forming body, a valve body and a return spring. The guide pipe accommodates the valve body and the return spring therein. The valve body opens and closes a valve hole formed at the valve hole forming body. A separation preventing means is engaged with an inner circumferential surface of the guide pipe.
EP01124518A 2000-10-16 2001-10-12 Vacuum pump Withdrawn EP1199475A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2000314967A JP2002122085A (en) 2000-10-16 2000-10-16 Channel structure in vacuum pump
JP2000314967 2000-10-16

Publications (2)

Publication Number Publication Date
EP1199475A2 EP1199475A2 (en) 2002-04-24
EP1199475A3 true EP1199475A3 (en) 2003-03-05

Family

ID=18794138

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01124518A Withdrawn EP1199475A3 (en) 2000-10-16 2001-10-12 Vacuum pump

Country Status (2)

Country Link
EP (1) EP1199475A3 (en)
JP (1) JP2002122085A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101137840B (en) 2005-03-07 2010-06-23 开利公司 Compressor noise suppression
DE102012003066B3 (en) * 2012-02-17 2013-07-04 Netzsch Pumpen & Systeme Gmbh METHOD AND DEVICE FOR FIXING AND SYNCHRONIZING TURNING PISTONS IN A ROTARY PISTON PUMP
FR3008145B1 (en) * 2013-07-04 2015-08-07 Pfeiffer Vacuum Sas DRY PRIMARY VACUUM PUMP

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1188975A (en) * 1957-12-24 1959-09-28 Comp Generale Electricite Variable volume non-return valve
US3958603A (en) * 1973-05-14 1976-05-25 The Nash Engineering Company Insert for movable diaphragm type flow control valve
FR2372363A1 (en) * 1976-11-24 1978-06-23 Bosch Siemens Hausgeraete Washing machine water outlet pipe valve - prevents return flow of dirty water to wash tub
EP0354161A2 (en) * 1988-08-02 1990-02-07 Carrier Corporation Muffler/check valve assembly for scroll compressor
DE4039644A1 (en) * 1989-12-15 1991-06-20 Vaillant Joh Gmbh & Co Central heating overflow valve - has flat annular sealing face on valve plate with peripheral radiused edge

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1188975A (en) * 1957-12-24 1959-09-28 Comp Generale Electricite Variable volume non-return valve
US3958603A (en) * 1973-05-14 1976-05-25 The Nash Engineering Company Insert for movable diaphragm type flow control valve
FR2372363A1 (en) * 1976-11-24 1978-06-23 Bosch Siemens Hausgeraete Washing machine water outlet pipe valve - prevents return flow of dirty water to wash tub
EP0354161A2 (en) * 1988-08-02 1990-02-07 Carrier Corporation Muffler/check valve assembly for scroll compressor
DE4039644A1 (en) * 1989-12-15 1991-06-20 Vaillant Joh Gmbh & Co Central heating overflow valve - has flat annular sealing face on valve plate with peripheral radiused edge

Also Published As

Publication number Publication date
JP2002122085A (en) 2002-04-26
EP1199475A2 (en) 2002-04-24

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