EP 0291938 B2 19951102 - Apparatus for hydraulic expansion.
Title (en)
Apparatus for hydraulic expansion.
Title (de)
Vorrichtung zum hydraulischen Aufweiten.
Title (fr)
Dispositif d'expansion hydraulique.
Publication
Application
Priority
DE 3716986 A 19870521
Abstract (en)
[origin: WO8809233A1] Devices are described which are suitable for simultaneous hydraulic expansion of several longitudinal sections of a hollow shaft for the production of connections by interlocking or frictional engagement between said sections and elements fitted thereto such as cams, toothed wheels and bearing seats. The devices include pressure probes with a longitudinal hydraulic fluid channel and a radial inlet bore to each longitudinal section of the hollow shaft to be expanded and, if necessary, with a longitudinal discharge channel and a radial discharge bore to the undeformed longitudinal sections of the hollow shaft between the sections to be expanded. Sealing means are provided which seal the undeformed longitudinal sections of the hollow shaft against penetration of the hydraulic fluid from the intermediate longitudinanl sections of the hollow shaft to be expanded. It is possible to fit individual sealing elements and/or expansion sleeves with intermediate spacer sleeves onto the body of a probe of uniform cross-section to permit rapid exchange of worn seals. In addition, the probe body can consist of sections screwed together axially which, when of small cross-section, accept sealing elements and, when of larger cross-section serve as spacer pieces. Examples of novel and improved seal shapes are also given.
IPC 1-7
IPC 8 full level
B21D 39/08 (2006.01); B21D 39/20 (2006.01)
CPC (source: EP US)
B21D 39/203 (2013.01 - EP US)
Designated contracting state (EPC)
BE CH DE ES FR GB IT LI NL SE
DOCDB simple family (publication)
EP 0291938 A1 19881123; EP 0291938 B1 19911106; EP 0291938 B2 19951102; DE 3716986 A1 19881215; DE 3854504 D1 19951026; DE 3866017 D1 19911212; DE 3866017 T 19911212; EP 0446964 A2 19910918; EP 0446964 A3 19911030; EP 0446964 B1 19950920; ES 2026223 T3 19920416; ES 2026223 T5 19960101; ES 2077106 T3 19951116; JP H01503526 A 19891130; JP H0479734 B2 19921216; US 5054756 A 19911008; WO 8809233 A1 19881201
DOCDB simple family (application)
EP 88107911 A 19880518; DE 3716986 A 19870521; DE 3854504 T 19880518; DE 3866017 T 19880518; DE 8800301 W 19880520; EP 91106867 A 19880518; ES 88107911 T 19880518; ES 91106867 T 19880518; JP 50428288 A 19880520; US 63931591 A 19910108