EP 0085080 B1 19860416 - CONTROL CIRCUIT FOR A PNEUMO-HYDRAULIC PRESSURE INTENSIFIER
Title (en)
CONTROL CIRCUIT FOR A PNEUMO-HYDRAULIC PRESSURE INTENSIFIER
Publication
Application
Priority
HU 225781 A 19810804
Abstract (en)
[origin: WO8300540A1] Pneumatically controlled pressure transducer intended to actuate hydraulic working members and provided with a double motor cylinder; on one side thereof there is a pneumatically actuated cylinder, and on the other side a hydraulically actuated cylinder; it is also provided with hydraulic working means connected to the hydraulic side. The invention is characterized by the presence of a control valve connected to the primary chamber which is before the piston of the pneumatic cylinder of the motor cylinder, valve which is in operation relationship with a starting valve while being connected by a choke retainer valve with another valve, and being also connected through a draining valve with the hydraulic tank, respectively by the valve with the secondary chamber of the pneumatic cylinder. Another essential characteristic consists in that the control valve is connected by the choke retainer valve of the hydraulic tank with the hydraulic cylinder of the double motor cylinder, thereby allowing an obturation by means of the hydraulic piston. The conduit located between the valve and the cylinder is in control relationship with the control valve through an additional choke retainer valve. The pressure transducer according to the invention is a relatively economical device having a unitary and simple structure, by means of which a large variety of hydraulic working members may be actuated in a way which is determined by the working members applied as well as by the operation mode subject to the work to be performed.
IPC 1-7
IPC 8 full level
F15B 3/00 (2006.01); F15B 11/032 (2006.01); F15B 11/072 (2006.01)
CPC (source: EP US)
F15B 11/032 (2013.01 - EP US); F15B 11/0725 (2013.01 - EP US); F15B 2211/212 (2013.01 - EP US); F15B 2211/216 (2013.01 - EP US); F15B 2211/30525 (2013.01 - EP US); F15B 2211/3056 (2013.01 - EP US); F15B 2211/40515 (2013.01 - EP US); F15B 2211/40584 (2013.01 - EP US); F15B 2211/50536 (2013.01 - EP US); F15B 2211/55 (2013.01 - EP US)
Citation (examination)
- FR 2229876 A1 19741213 - BENETEAU DONALD [CA]
- PRODUCT ENGINEERING, Band 40, Nr. 12, 16. Juni 1969 NEW YORK (US) "Intensifier powered by shop air delivers 200,000-psi oil pressure", Seiten 115,116
- ÖLHYDRAULIK UND PNEUMATIK, Band 15, Nr. 1, Januar 1971 MAINZ (DE) K.-H. MUTH: "Pneumatisch verzögerte Steuerung von Druckluft-Wegeventilen", Seiten 36,37
- ENGINEERS DIGEST, Band 34, nr. 8, August 1973 LONDON (GB) "Low-Cost Pneumatic Time-Delay Systems", Seiten 29-31.
- DESIGN ENGINEERING, Band 39, Dezember 1974 LONDEN (GB) "Applications of dashpot cylinders and check-units in hydro-pneumatic techniques", Seiten 29,31-35.
Designated contracting state (EPC)
AT CH DE FR GB LI SE
DOCDB simple family (publication)
WO 8300540 A1 19830217; DE 3270622 D1 19860522; EP 0085080 A1 19830810; EP 0085080 A4 19840120; EP 0085080 B1 19860416; FI 75214 B 19880129; FI 75214 C 19880509; FI 831086 A0 19830330; FI 831086 L 19830330; HU 185642 B 19850328; JP S58501333 A 19830811; US 4509330 A 19850409
DOCDB simple family (application)
HU 8200037 W 19820804; DE 3270622 T 19820804; EP 82902371 A 19820804; FI 831086 A 19830330; HU 225781 A 19810804; JP 50241682 A 19820804; US 48394983 A 19830404