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Current content: 158 383 361 patent documents

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131 418 new documents added

1 347 785 documents amended

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EP 0284759 B1 19900725 - HAMMER

Title (en)

HAMMER

Publication

EP 0284759 B1 19900725 (DE)

Application

EP 88102341 A 19880218

Priority

DE 3710928 A 19870401

Abstract (en)

[origin: US4871034A] In a rammer for driving in pipes open in the direction of ramming, in which a piston, axially reciprocated in a housing having an impact head, imparts its thrust to the housing, making the impact head integral with the housing allows a shorter rammer to be used without loss of thrust.

IPC 1-7

E02D 7/10; E21B 7/26

IPC 8 full level

E02D 7/10 (2006.01); E21B 4/14 (2006.01); E21B 7/04 (2006.01); E21B 7/26 (2006.01)

CPC (source: EP US)

E02D 7/10 (2013.01 - EP US); E21B 4/145 (2013.01 - EP US); E21B 7/046 (2013.01 - EP US)

Designated contracting state (EPC)

BE ES FR GB IT NL

DOCDB simple family (publication)

EP 0284759 A1 19881005; EP 0284759 B1 19900725; DE 3710928 A1 19881013; DE 3710928 C2 19920130; DE 8717637 U1 19891130; ES 2016394 B3 19901101; JP S63261013 A 19881027; US 4871034 A 19891003

DOCDB simple family (application)

EP 88102341 A 19880218; DE 3710928 A 19870401; DE 8717637 U 19870401; ES 88102341 T 19880218; JP 7582488 A 19880329; US 16101888 A 19880226