Global Patent Index - EP 0914896 A3

EP 0914896 A3 19991215 - Piston-cylinder for welding gun

Title (en)

Piston-cylinder for welding gun

Title (de)

Schweisszangenzylinder

Title (fr)

Piston-cylindre pour pince de soudage

Publication

EP 0914896 A3 19991215 (DE)

Application

EP 98119668 A 19981017

Priority

DE 19747298 A 19971025

Abstract (en)

[origin: EP0914896A2] A double-acting piston/cylinder unit, provided with three pressure chambers for respectively performing a hollow piston advance stroke, a work piston work stroke and a piston return stroke, has an additional pressure chamber which performs the work piston return stroke and which is at least partially located between the hollow piston and the work piston. A double-acting piston/cylinder unit is equipped with a first pressure chamber (7) which is located between a hollow advance stroke piston (3) and a cylinder head (6) and which performs the hollow piston advance stroke, a second pressure chamber (8) which is located between the hollow advance stroke piston (3) and a work piston (5) and which performs the work piston work stroke and a third return stroke pressure chamber (11) which is located between the hollow advance stroke piston and work piston assembly (9) and a cylinder base (10) and which encloses the piston rod (4). The novelty comprises the provision of a fourth pressure chamber (12) which produces the return stroke of the work piston (5) and which is at least partially located between the hollow advance stroke piston (3) and the work piston (5).

IPC 1-7

B23K 11/31

IPC 8 full level

F15B 11/036 (2006.01); F15B 15/20 (2006.01)

CPC (source: EP)

F15B 11/036 (2013.01); F15B 15/204 (2013.01); F15B 2211/7055 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

DOCDB simple family (publication)

DE 19747298 A1 19990429; EP 0914896 A2 19990512; EP 0914896 A3 19991215

DOCDB simple family (application)

DE 19747298 A 19971025; EP 98119668 A 19981017