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1. WO1996002752 - HYRAULIC PISTON MACHINE

Publication Number WO/1996/002752
Publication Date 01.02.1996
International Application No. PCT/DK1995/000272
International Filing Date 28.06.1995
Chapter 2 Demand Filed 05.02.1996
IPC
F04B 1/12 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
1Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
12having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
F04B 1/20 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
1Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
12having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
20having rotary cylinder block
CPC
F04B 1/124
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
1Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
12having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
122Details or component parts, e.g. valves, sealings or lubrication means
124Pistons
F04B 1/126
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
1Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
12having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
122Details or component parts, e.g. valves, sealings or lubrication means
124Pistons
126Piston shoe retaining means
F04B 1/2078
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
1Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
12having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
20having rotary cylinder block
2014Details or component parts
2078Swash plates
F05C 2225/04
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
CINDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
2225Synthetic polymers, e.g. plastics; Rubber
04PTFE [PolyTetraFluorEthylene]
F05C 2253/12
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
CINDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
2253Other material characteristics; Treatment of material
12Coating
Applicants
  • DANFOSS A/S [DK/DK]; DK-6430 Nordborg, DK (AllExceptUS)
  • JEPSEN, Hardy, Peter [DK/DK]; DK (UsOnly)
  • GÜRTLER, Zoltan [DK/DK]; DK (UsOnly)
Inventors
  • JEPSEN, Hardy, Peter; DK
  • GÜRTLER, Zoltan; DK
Common Representative
  • DANFOSS A/S; Patent Dept. DK-6430 Nordborg, DK
Priority Data
P 44 24 670.613.07.1994DE
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) HYRAULIC PISTON MACHINE
(FR) MACHINE A PISTON HYDRAULIQUE
Abstract
(EN)
A hydraulic piston machine (1) is disclosed, having a piston arranged to move back and forth in a cylinder body (2). In such a machine it is desirable to be able to achieve a longer service life, even when the hydraulic medium is not suitable for lubricating the bearing faces. For that purpose, at least on its outer face siliding on the cylinder body (2), the piston (4) has a layer (11) of a friction-reducing plastics material, wherein at the end of the piston (4) there is provided a bearing face (12) of an articulated joint (7, 8) by means of which a slide shoe (6) is connected, articulated to the piston (4), the layer (11) being continued onto the bearing face (12).
(FR)
L'invention concerne une machine (1) à piston hydraulique comportant un piston agencé pour effectuer un mouvement de va-et-vient dans un corps de cylindre (2). L'on s'est attaché à prolonger la vie utile de ce type de machine, même lorsque le milieu hydraulique ne convient pas à la lubrification des surfaces d'appui. Pour ce faire, au moins sur sa surface extérieure coulissant sur le corps de cylindre (2), le piston (4) présente une couche (11) d'une matière plastique réduisant les frottements, de manière qu'à l'extrémité du piston (4) se trouve une surface d'appui (12) d'un joint articulé (7, 8) par lequel un patin coulissant (6) est relié articulé au piston (4), la couche (11) étant continue sur la surface d'appui (12).
Also published as
Latest bibliographic data on file with the International Bureau