EP 0285435 A3 19890809 - A RAM FOR A PRESS
Title (en)
A RAM FOR A PRESS
Publication
Application
Priority
GB 8707967 A 19870403
Abstract (en)
[origin: EP0285435A2] A ram for a press, comprising an hydraulic piston and cylinder arrangement (10,22) which is operated by the application of pressure to hydraulic fluid in a region of the hydraulic chamber (16) within the cylinder (10) which is on one side of the piston (22). Hydraulic fluid is free to flow into and out of the said region until the hydraulic piston (22) nears the end of its stroke. The bottom end (44) of the chamber (16) is narrowed, to cut off such flow at that point, so that subsequent application of pressure to the hydraulic fluid in the said region effects a movement of the hydraulic piston (22) under the full operating force of the arrangement (10,22).
IPC 1-7
IPC 8 full level
B30B 15/16 (2006.01)
CPC (source: EP)
B30B 15/161 (2013.01); B30B 15/165 (2013.01)
Citation (search report)
- [X] DE 1917116 A1 19691023 - LOIRE ATEL FORGES
- [X] DE 802606 C 19510215 - GEISEL KARL
- [X] DE 3130931 A1 19830217 - AVIAT GMBH [DE]
- [Y] DE 1919095 A1 19701105 - GABRIEL GUENTHER
- [Y] WO 7900986 A1 19791129 - RAPP EUGEN [DE], et al
- [Y] FR 995204 A 19511129 - ASEA AB
Designated contracting state (EPC)
DE ES FR GB IT SE
DOCDB simple family (publication)
EP 0285435 A2 19881005; EP 0285435 A3 19890809; GB 8707967 D0 19870507
DOCDB simple family (application)
EP 88302930 A 19880331; GB 8707967 A 19870403