EP1336756A3 - Pump piston filled with hollow spheres - Google Patents

Pump piston filled with hollow spheres Download PDF

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Publication number
EP1336756A3
EP1336756A3 EP03001458A EP03001458A EP1336756A3 EP 1336756 A3 EP1336756 A3 EP 1336756A3 EP 03001458 A EP03001458 A EP 03001458A EP 03001458 A EP03001458 A EP 03001458A EP 1336756 A3 EP1336756 A3 EP 1336756A3
Authority
EP
European Patent Office
Prior art keywords
pump piston
hollow spheres
main body
piston filled
recess
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
EP03001458A
Other languages
German (de)
French (fr)
Other versions
EP1336756A2 (en
EP1336756B1 (en
Inventor
Bernd Gärtner
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.)
Brueninghaus Hydromatik GmbH
Original Assignee
Brueninghaus Hydromatik GmbH
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 Brueninghaus Hydromatik GmbH filed Critical Brueninghaus Hydromatik GmbH
Publication of EP1336756A2 publication Critical patent/EP1336756A2/en
Publication of EP1336756A3 publication Critical patent/EP1336756A3/en
Application granted granted Critical
Publication of EP1336756B1 publication Critical patent/EP1336756B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/122—Details or component parts, e.g. valves, sealings or lubrication means
    • F04B1/124—Pistons

Abstract

Ein Hohlkolben (1) für eine Kolbenmaschine umfaßt einen Hauptkörper (7), in welchem eine Ausnehmung (8) zumindest über einen Teil der axialen Länge des Hauptkörpers (7) ausgebildet ist. Die Ausnehmung (8) ist zumindest zu einem Teil mit einer Hohlkugelfüllung (2) gefüllt, welche mit dem Hauptkörper (7) mittels Sintern einen Verbund bildet.

Figure 00000001
A hollow piston (1) for a piston machine comprises a main body (7), in which a recess (8) is formed at least over part of the axial length of the main body (7). The recess (8) is at least partially filled with a hollow ball filling (2) which forms a bond with the main body (7) by means of sintering.
Figure 00000001
EP20030001458 2002-02-18 2003-01-22 Pump piston filled with hollow spheres Expired - Fee Related EP1336756B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2002106729 DE10206729B4 (en) 2002-02-18 2002-02-18 Hollow piston with hollow ball filling
DE10206729 2002-02-18

Publications (3)

Publication Number Publication Date
EP1336756A2 EP1336756A2 (en) 2003-08-20
EP1336756A3 true EP1336756A3 (en) 2003-12-03
EP1336756B1 EP1336756B1 (en) 2006-10-18

Family

ID=27618752

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20030001458 Expired - Fee Related EP1336756B1 (en) 2002-02-18 2003-01-22 Pump piston filled with hollow spheres

Country Status (2)

Country Link
EP (1) EP1336756B1 (en)
DE (2) DE10206729B4 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009056903A1 (en) 2009-12-03 2011-06-09 Danfoss A/S Hydraulic piston machine, in particular water-hydraulic machine
DE102013211893A1 (en) * 2013-06-24 2014-12-24 Robert Bosch Gmbh Hollow piston for a swashplate machine and swashplate machine
DE102016212231A1 (en) * 2016-07-05 2018-01-11 Mahle International Gmbh Piston for an axial piston machine

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63266269A (en) * 1987-04-21 1988-11-02 Taiho Kogyo Co Ltd Piston for hydraulic device
US4925740A (en) * 1989-07-28 1990-05-15 Rohr Industries, Inc. Hollow metal sphere filled stabilized skin structures and method of making
DE3902032A1 (en) * 1989-01-25 1990-07-26 Mtu Muenchen Gmbh SINED LIGHTWEIGHT MATERIAL WITH MANUFACTURING PROCESS
DE3919329C1 (en) * 1989-06-13 1990-12-06 Hydromatik Gmbh, 7915 Elchingen, De
DE4108786A1 (en) * 1991-03-18 1992-09-24 Hydromatik Gmbh PISTON FOR AXIAL AND RADIAL PISTON MACHINES
DE4338457A1 (en) * 1993-11-11 1995-05-18 Mtu Muenchen Gmbh Component made of metal or ceramic with a dense outer shell and porous core and manufacturing process
US5642654A (en) * 1994-09-01 1997-07-01 Sundstrand Corporation Piston and method of manufacturing the same
DE19929760A1 (en) * 1999-06-29 2001-01-04 Fraunhofer Ges Forschung Production of metallic oxidic ceramic hollow spheres comprises applying the starting materials as cladding material to spherical support elements, pyrolyzing the green body formed and sintering
DE10115263A1 (en) * 2000-03-31 2001-10-04 Sauer Danfoss Inc Hydraulic piston for cylinder block of hydrostatic drive unit has long cylindrical body inside of which is cavity with second end which is open and ends inside plane running through second end of body
US6338293B1 (en) * 2000-06-30 2002-01-15 Sauer-Danfoss Inc. Reduced oil volume piston assembly for a hydrostatic unit

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63266269A (en) * 1987-04-21 1988-11-02 Taiho Kogyo Co Ltd Piston for hydraulic device
DE3902032A1 (en) * 1989-01-25 1990-07-26 Mtu Muenchen Gmbh SINED LIGHTWEIGHT MATERIAL WITH MANUFACTURING PROCESS
DE3919329C1 (en) * 1989-06-13 1990-12-06 Hydromatik Gmbh, 7915 Elchingen, De
US4925740A (en) * 1989-07-28 1990-05-15 Rohr Industries, Inc. Hollow metal sphere filled stabilized skin structures and method of making
DE4108786A1 (en) * 1991-03-18 1992-09-24 Hydromatik Gmbh PISTON FOR AXIAL AND RADIAL PISTON MACHINES
DE4338457A1 (en) * 1993-11-11 1995-05-18 Mtu Muenchen Gmbh Component made of metal or ceramic with a dense outer shell and porous core and manufacturing process
US5642654A (en) * 1994-09-01 1997-07-01 Sundstrand Corporation Piston and method of manufacturing the same
DE19929760A1 (en) * 1999-06-29 2001-01-04 Fraunhofer Ges Forschung Production of metallic oxidic ceramic hollow spheres comprises applying the starting materials as cladding material to spherical support elements, pyrolyzing the green body formed and sintering
DE10115263A1 (en) * 2000-03-31 2001-10-04 Sauer Danfoss Inc Hydraulic piston for cylinder block of hydrostatic drive unit has long cylindrical body inside of which is cavity with second end which is open and ends inside plane running through second end of body
US6338293B1 (en) * 2000-06-30 2002-01-15 Sauer-Danfoss Inc. Reduced oil volume piston assembly for a hydrostatic unit

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 013, no. 065 (M - 797) 14 February 1989 (1989-02-14) *

Also Published As

Publication number Publication date
EP1336756A2 (en) 2003-08-20
DE10206729A1 (en) 2003-09-18
DE10206729B4 (en) 2004-02-05
DE50305393D1 (en) 2006-11-30
EP1336756B1 (en) 2006-10-18

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