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Gear pump hard, e.g. steel, driving gear - has softer, e.g. plastic, driven gear for reduced noise development and wear

Info

Publication number
DE3045192A1
DE3045192A1 DE19803045192 DE3045192A DE3045192A1 DE 3045192 A1 DE3045192 A1 DE 3045192A1 DE 19803045192 DE19803045192 DE 19803045192 DE 3045192 A DE3045192 A DE 3045192A DE 3045192 A1 DE3045192 A1 DE 3045192A1
Authority
DE
Grant status
Application
Patent type
Prior art keywords
gear
driven
driving
pump
plastic
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.)
Granted
Application number
DE19803045192
Other languages
German (de)
Other versions
DE3045192C2 (en )
Inventor
Robert Kroh
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.)
Fresenius SE and Co KGaA
Original Assignee
DR EDUARD FRESENIUS CHEMISCH-PHARMAZEUTISCHE INDUSTRIE KG
Fresenius SE and Co KGaA
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

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00Rotary-piston machines or pumps
    • F04C2/08Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/082Details specially related to intermeshing engagement type machines or pumps
    • F04C2/084Toothed wheels
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05CINDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00Synthetic polymers, e.g. plastics; Rubber
    • F05C2225/04PTFE [PolyTetraFluorEthylene]

Abstract

The pump comprises at least two pump gears (4,5) of which at least one (4) is a driving gear which consists of a hard material, such as a ceramic or particularly metal whilst the driven gear (5) is in a softer more resilient material, e.g. plastic. The driving gear pref. has greater wear resistance than the driven gear. The driven gear may be in plastic such as PTFE with a filler, e.g. carbon, molybdenum di-sulfide, glass fibre, high-grade steel, bronze etc. The carbon content of the PTFE may be about 20 to 30%, pref. 35%. The driven gear may have greater radial than axial thermal expansion.
DE19803045192 1980-12-01 1980-12-01 Expired DE3045192C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19803045192 DE3045192C2 (en) 1980-12-01 1980-12-01

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19803045192 DE3045192C2 (en) 1980-12-01 1980-12-01

Publications (2)

Publication Number Publication Date
DE3045192A1 true true DE3045192A1 (en) 1982-06-03
DE3045192C2 DE3045192C2 (en) 1983-10-27

Family

ID=6117997

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19803045192 Expired DE3045192C2 (en) 1980-12-01 1980-12-01

Country Status (1)

Country Link
DE (1) DE3045192C2 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4583924A (en) * 1983-11-10 1986-04-22 Fresenius Ag Gear pump, especially for medical purposes
US4651575A (en) * 1984-05-18 1987-03-24 Mitsubishi Denki Kabushiki Kaisha Vehicle starter and gear structure therefor
EP0378009A2 (en) * 1989-01-10 1990-07-18 Ishikawajima-Harima Jukogyo Kabushiki Kaisha Screw rotor set
US5275205A (en) * 1991-02-19 1994-01-04 Hoerbiger Fluidtechnik Gmbh Valve containing coupled, rotatable elements to control fluid flow therethrough
US5785510A (en) * 1994-09-01 1998-07-28 Fluid Management Limited Partnership Gear pump having members with different hardnesses
EP1892418A2 (en) * 2006-08-12 2008-02-27 Industra Industrianlagen - Maschinen und Teile GmbH Cog wheel machine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2966860A (en) * 1957-04-03 1961-01-03 Lobee Pump & Machinery Co Pump for corrosive fluids

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2966860A (en) * 1957-04-03 1961-01-03 Lobee Pump & Machinery Co Pump for corrosive fluids

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4583924A (en) * 1983-11-10 1986-04-22 Fresenius Ag Gear pump, especially for medical purposes
US4651575A (en) * 1984-05-18 1987-03-24 Mitsubishi Denki Kabushiki Kaisha Vehicle starter and gear structure therefor
EP0378009A2 (en) * 1989-01-10 1990-07-18 Ishikawajima-Harima Jukogyo Kabushiki Kaisha Screw rotor set
EP0378009A3 (en) * 1989-01-10 1990-09-19 Ishikawajima-Harima Jukogyo Kabushiki Kaisha Screw rotor set
US5275205A (en) * 1991-02-19 1994-01-04 Hoerbiger Fluidtechnik Gmbh Valve containing coupled, rotatable elements to control fluid flow therethrough
US5785510A (en) * 1994-09-01 1998-07-28 Fluid Management Limited Partnership Gear pump having members with different hardnesses
EP0947699A1 (en) * 1994-09-01 1999-10-06 Fluid Management, Inc. Gear pump
EP1892418A2 (en) * 2006-08-12 2008-02-27 Industra Industrianlagen - Maschinen und Teile GmbH Cog wheel machine
EP1892418A3 (en) * 2006-08-12 2014-08-27 INDUSTRA Industrieanlagen - Maschinen und Teile GmbH Cog wheel machine

Also Published As

Publication number Publication date Type
DE3045192C2 (en) 1983-10-27 grant

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Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
8127 New person/name/address of the applicant

Owner name: FRESENIUS AG, 6380 BAD HOMBURG, DE

D2 Grant after examination
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee