Global Patent Index - EP 0085037 B1

EP 0085037 B1 19860430 - RETAINING HELICAL SPRING FOR PNEUMATIC DEVICES SUCH AS CHISEL HAMMERS

Title (en)

RETAINING HELICAL SPRING FOR PNEUMATIC DEVICES SUCH AS CHISEL HAMMERS

Publication

EP 0085037 B1 19860430 (DE)

Application

EP 83890004 A 19830119

Priority

AT 19882 A 19820121

Abstract (en)

[origin: EP0085037A1] 1. A helical retaining spring (1) for the operating tool, for example for the bore bit, of a compressed gas tool, in particular a compressed-air driven small chisel hammer (20), comprising a part (3) associated with the tool cylinder and a part (2) joined to the said part (3) and associated with the operating tool, at least one region (4, 4a) of at least one of the turns of the retaining spring having a substantially chord-shaped form. characterized in that at least one preferably the last turn of the part (3) --associated with the tool cylinder (10) --of the retaining spring (1) which holds, where appropriate with its part (2) associated with the operating tool, a holding cap (15) through which the said operating tool or its shaft (12) passes, has the region or regions (4, 4a) which has or have a substantially chord-shaped form and which can be brought into engagement with at least one appropriately shaped recess (16, 17) in the sleeve of the tool cylinder (10).

IPC 1-7

B25D 17/08; E21C 3/34

IPC 8 full level

B25D 17/08 (2006.01)

CPC (source: EP)

B25D 17/08 (2013.01); B25D 2250/371 (2013.01)

Designated contracting state (EPC)

CH DE FR GB IT LI SE

DOCDB simple family (publication)

EP 0085037 A1 19830803; EP 0085037 B1 19860430; AT 372034 B 19830825; AT A19882 A 19830115; DE 3363216 D1 19860605

DOCDB simple family (application)

EP 83890004 A 19830119; AT 19882 A 19820121; DE 3363216 T 19830119