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1. (WO1983000539) RECIPROCATORY PISTON AND CYLINDER MACHINE
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/1983/000539 International Application No.: PCT/AU1982/000128
Publication Date: 17.02.1983 International Filing Date: 11.08.1982
IPC:
F04B 25/02 (2006.01) ,F04B 37/14 (2006.01) ,F04B 39/04 (2006.01) ,F04B 39/08 (2006.01) ,F04B 39/10 (2006.01)
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04
POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
B
POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
25
Multi-stage pumps specially adapted for elastic fluids
02
of stepped-piston type
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04
POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
B
POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
37
Pumps specially adapted for elastic fluids and having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/-F04B35/187
10
for special use
14
to obtain high vacuum
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04
POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
B
POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
39
Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/-F04B37/225
04
Measures to avoid lubricant contaminating the pumped fluid
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04
POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
B
POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
39
Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/-F04B37/225
08
Actuation of distribution members
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04
POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
B
POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
39
Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/-F04B37/225
10
Adaptation or arrangement of distribution members
Applicants:
BALKAU, Guenter, Karl, Willi [AU/AU]; AU (UsOnly)
BEZ, Eckhard [AU/AU]; AU (UsOnly)
FARRANT, John, Lascelles [AU/AU]; AU (UsOnly)
COMMONWEALTH SCIENTIFIC AND INDUSTRIAL RESEARCH OR [AU/AU]; GANIZATION; Campbell, A.C.T.;, AU (AllExceptUS)
Inventors:
BALKAU, Guenter, Karl, Willi; AU
BEZ, Eckhard; AU
FARRANT, John, Lascelles; AU
Agent:
NOONAN, Gregory, Joseph @; Davies & Collison 1 Little Collins Street Melbourne, Vic. 3000, AU
Priority Data:
PF 021713.08.1981AU
Title (EN) RECIPROCATORY PISTON AND CYLINDER MACHINE
(FR) MACHINE A PISTON ET CYLINDRE A MOUVEMENT ALTERNATIF
Abstract:
(EN) A reciprocatory piston and cylinder machine particularly suitable for use as a vacuum pump includes a cylinder (17), a cylindrical piston (16) relatively slidably reciprocable within the cylinder (17), and means for substantially sealing the annular space between the piston (16) and cylinder (17) in lieu of oil other liquid lubricant. The sealing means comprises a sleeve (102) of a low-friction material disposed under circumferential tension, and preferably also under longitudinal tension, on the cylindrical surface of the piston (16). Also disclosed is a reciprocatory differential piston and cylinder machine of particular prior construction having a one-way valve (42) in an exhaust port (30) ahead of a head portion (24) of the piston (16). The arrangement is such that, as the front face (28) of the piston head portion (24) approaches the cylinder end face (52), the front face (28) physically moves the one-way valve (42) so as to open the exhaust port (30).
(FR) Une machine à piston et cylindre à mouvement alternatif particulièrement indiquée pour une utilisation en tant que pompe à vide comprend un cylindre (17), un piston cylindrique (16) pouvant coulisser avec un mouvement alternatif à l'intérieur du cylindre (17), et des moyens permettant de sceller sensiblement l'espace annulaire entre le piston (16) et le cylindre (17) à la place de l'huile ou d'un autre lubrifiant liquide. Le moyen de scellement comprend une chemise (102) composée d'un matériau à faible frottement soumis à une tension appliquée à la circonférence et de préférence aussi longitudinalement, sur la surface cylindrique du piston (16). Une machine à piston et cylindre différentiels à mouvement alternatif d'une construction préalable particulière possédant une soupape unidirectionnelle (42) dans un orifice d'échappement (30) sur l'avant d'une partie de tête (24) du piston (16) est également décrite. L'assemblage est tel que lorsque la face intérieure (28) de la partie de tête du piston (24) s'approche de la face d'extrémité du cylindre (52), la face antérieure (28) déplace physiquement la soupape unidirectionnelle (42) de manière à ouvrir l'orifice d'échappement (30).
Designated States: AU, CH, DE, GB, JP, US
European Patent Office (EPO) (AT, BE, CH, DE, FR, GB, LU, NL, SE)
Publication Language: English (EN)
Filing Language: English (EN)