Global Patent Index - EP 0993355 A1

EP 0993355 A1 2000-04-19 - PNEUMATIC SPRING PERCUSSION MECHANISM WITH AN AIR SUPPLY

Title (en)

PNEUMATIC SPRING PERCUSSION MECHANISM WITH AN AIR SUPPLY

Title (de)

LUFTFEDER-SCHLAGWERK MIT LUFTAUFLADUNG

Title (fr)

MECANISME DE PERCUSSION A RESSORT PNEUMATIQUE AVEC SURALIMENTATION EN AIR

Publication

EP 0993355 A1 (DE)

Application

EP 98928266 A

Priority

  • DE 19728729 A
  • EP 9802855 W

Abstract (en)

[origin: DE19728729A1] A double action pneumatic spring percussion mechanism has an air supply mechanism. A percussion piston (13) is movable within a driving piston (11). In an air-supply position, ambient air is supplied through an air inlet (20) to a front pneumatic spring (15). When the percussion piston (13) and driving piston (11) are moved accordingly relative to each other, a loading hole (19) is opened, through which air under increased pressure can flow out of the front pneumatic spring (15) into a rear pneumatic spring (18), ensuring an increase of pressure in the rear pneumatic spring (18). The air pressure increase in both pneumatic springs (15, 18) makes it possible to use the pneumatic spring percussion mechanism even in conditions of operation with a low ambient air pressure.

IPC 1-7 (main, further and additional classification)

B25D 11/12

IPC 8 full level (invention and additional information)

B25D 11/12 (2006.01)

CPC (invention and additional information)

B25D 11/125 (2013.01)

Citation (search report)

See references of WO 9901259A1

Designated contracting state (EPC)

CH DE ES FR GB IT LI NL SE

EPO simple patent family

DE 19728729 A1 19990107; DE 19728729 C2 20001109; EP 0993355 A1 20000419; JP 2002507938 A 20020312; US 6119796 A 20000919; WO 9901259 A1 19990114

INPADOC legal status


2000-12-20 [18W] APPLICATION WITHDRAWN

- Date of withdrawal: 20001023

2000-08-23 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20000706

2000-04-19 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19990512

2000-04-19 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): CH DE ES FR GB IT LI NL SE