Global patent index - EP 0820578 A4

EP 0820578 A4 2000-04-19 - ELECTROTHERMAL CHEMICAL CARTRIDGE

Title (en)

ELECTROTHERMAL CHEMICAL CARTRIDGE

Title (de)

CHEMISCHE ELEKTROTHERMISCHE KATEDER

Title (fr)

CARTOUCHE CHIMIQUE ELECTROTHERMIQUE

Publication

EP 0820578 A4 (EN)

Application

EP 95914744 A

Priority

US 9503360 W

Abstract (en)

[origin: WO9629565A1] An electrothermal chemical cartridge (10) with a fuse (18) of tapering cross section enables higher impulse energy to be imparted to a projectile (6) by means of complete controlled burning of propellant (24). A long, narrow tube (16) filled with propellant (24) has a fuse (18) on its inside surface with a cross section that tapers toward the discharge end, separated from the electrical ground of the cartridge casing by a layer of insulation sufficiently thin to be destroyed as the fuse ignites the propellant. A high-voltage electrode (26) connected at the back end (14) of the tube (16) provides for application of a pulse of sufficient current density to ohmically heat or burn the fuse in a controlled fashion from the discharge end (12) to the back end (14). Many such tubes (152) can be bundled together in a large casing (150) for wide barrel guns.

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

F42B 5/08

IPC 8 full level (invention and additional information)

F42B 5/08 (2006.01)

IPC 8 main group level (invention and additional information)

F42B (2006.01)

CPC (invention and additional information)

F42B 5/08 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT CH DE FR GB LI SE

EPO simple patent family

WO 9629565 A1 19960926; AU 2186595 A 19961008; AU 708028 B2 19990729; BR 9510547 A 19980609; CA 2215239 A1 19960926; CA 2215239 C 20050322; EP 0820578 A1 19980128; EP 0820578 A4 20000419; FI 973751 A0 19970922; FI 973751 A 19970922; JP 3585930 B2 20041110; JP H11502301 A 19990223; NO 974362 A 19971117; NO 974362 D0 19970922

INPADOC legal status

2000-07-05 [18W] WITHDRAWN

- Ref Legal Event Code: 18W

- Date of withdrawal: 20000504

2000-04-26 [RIC1] CLASSIFICATION (CORRECTION)

- Ref Legal Event Code: RIC1

- Free Format Text: 7F 42B 5/08 A, 7F 42B 6/00 B

2000-04-19 [A4] SUPPLEMENTARY SEARCH REPORT

- Ref Legal Event Code: A4

- Effective date: 20000308

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

- Ref Legal Event Code: AK

- Designated State(s): AT CH DE FR GB LI SE

1998-01-28 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 19971023

1998-01-28 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): AT CH DE FR GB LI SE