Global patent index - EP 0972946 A1

EP 0972946 A1 2000-01-19 - Pneumatic-hydraulic force intensifier

Title (en)

Pneumatic-hydraulic force intensifier

Title (de)

Pneumatisch-hydraulischer Kraftübersetzer

Title (fr)

Multiplicateur de force pneumo-hydraulique

Publication

EP 0972946 A1 (FR)

Application

EP 98500163 A

Priority

EP 98500163 A

Abstract (en)

The force multiplier utilizes separate pneumatic and hydraulic chambers to provide motive force to a pneumatically or hydraulically activated unit. The force multiplier comprises a principal cylinder (51) with a principal piston (9) and a rear chamber (C8) which is coaxially extended by a cylindrical chamber (C5) through the interior of the piston. A second transverse cylinder has a second piston (7) and a rear chamber (C3) activated by pressurized air and a front oil chamber (C4) in communication with the principal cylinder rear chamber. A third cylinder (53) with a rear chamber (C6) activated by pressurized air has a third piston (15) coaxial with the principal piston which is introduced by its displacement in the principal piston rear chamber. Oil seals (8,20) in combination with the principal piston prevent communication between the chambers of the cylinders.

Abstract (fr)

Multiplicateur de force pneumo-hydraulique, se composant d'un cylindre principal (51) avec un piston principal (9) et une chambre postérieure (C8) qui se prolonge de manière coaxiale par une chambre cylindrique (C5) par l'intérieur dudit piston (9) et qui est plein d'huile; un second cylindre (52) disposé transversalement et actionné au cylindre principal; un troisième cylindre (53) avec une chambre postérieure (C6) à actionnement par fluide et un troisième piston (15) coaxial avec le piston principal (9) et qui s'introduit par son déplacement dans la chambre cylindrique (C5) dudit piston principal (9); des joints d'étanchéité d'huile qui avec le piston principal empêchent la communication entre les chambres des cylindres. Applicable dans le domaine des outils. <IMAGE>

IPC 1-7 (main, further and additional classification)

F15B 11/032

IPC 8 full level (invention and additional information)

F15B 11/032 (2006.01)

CPC (invention and additional information)

F15B 11/032 (2013.01); F15B 2211/216 (2013.01); F15B 2211/30505 (2013.01); F15B 2211/50518 (2013.01)

Citation (applicant)

None

Citation (search report)

Designated contracting state (EPC)

AT BE CH DE DK FI FR GB IT LI NL SE

EPO simple patent family

EP 0972946 A1 20000119

INPADOC legal status

2001-04-25 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20000720

2000-09-27 [AKX] PAYMENT OF DESIGNATION FEES

- Free Format Text: AT BE CH DE DK FI FR GB IT LI NL SE

2000-01-19 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH DE DK FI FR GB IT LI NL SE

2000-01-19 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Free Format Text: AL;LT;LV;MK;RO;SI