Global Patent Index - EP 1029391 A1

EP 1029391 A1 2000-08-23 - ELECTROMECHANICAL TRANSDUCER

Title (en)

ELECTROMECHANICAL TRANSDUCER

Title (de)

ELEKTROMECHANISCHER WANDLER

Title (fr)

TRANSDUCTEUR ELECTROMECANIQUE

Publication

EP 1029391 A1 (EN)

Application

EP 98951600 A

Priority

  • GB 9803298 W
  • GB 9723194 A

Abstract (en)

[origin: WO9923744A1] The electromechanical transducer consists of a stator (1) having a plurality of inner pole pieces (2) that describe a helix and a rotor having magnetic poles that similarly describe a helix. The rotor is constrained, for example by means of a spiral spring, so that the rotor can only move axially, no rotary movement is permitted. Each pole piece (2) of the stator is connected to a radial core (3) about which respective coils (5,6) are wound. Thus, the coils too describe a helix about the axis of the stator (1). The structure of the transducer results in the magnetic circuit having a helical component that contributes to the axial movement of the rotor. The transducer benefits from many of the advantages of rotary motors whilst providing linear movement.

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

H02K 41/02; H02K 33/16

IPC 8 full level (invention and additional information)

H02K 33/16 (2006.01); H02K 35/02 (2006.01); H02K 41/02 (2006.01)

CPC (invention and additional information)

H02K 41/02 (2013.01); H02K 33/16 (2013.01); H02K 35/02 (2013.01)

Citation (search report)

See references of WO 9923744A1

Designated contracting state (EPC)

DE ES FR GB IT NL

EPO simple patent family

WO 9923744 A1 19990514; EP 1029391 A1 20000823; GB 9723194 D0 19980107

INPADOC legal status


2003-08-13 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20030124

2001-08-01 [17Q] FIRST EXAMINATION REPORT

- Ref Legal Event Code: 17Q

- Effective date: 20010615

2000-08-23 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 20000518

2000-08-23 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

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