Abstract: The invention relates to an electric motor including a rotor (2) including a magnetised part (3) defining a plurality of rotor poles, and a stator (4) including a plurality of coils (8) and a magnetic armature (6) defining a magnetic circuit. Each coil comprises a coil core (14) in the form of an attached part made of a magnetic material fastened to the magnetic armature, the coil core including a tooth defining a magnetic pole of the stator. The tooth comprises extensions (6a, 16b) extending in an axial direction, a height H? of the tooth and a height H of the coil being comparable to a height H? of the magnetised part of the rotor.

Abstract: A membrane or piston pump drive comprises a stepping motor (2) and a rotary-to-linear conversion mechanism for converting the rotary movement into a translation movement (6). The rotary-to-linear conversion mechanism comprises a rotary member (4) and a piston member (7) intended to move a piston or a membrane of the pump. The stepping motor comprises a rotor coupled to the rotary member which engages the piston member (7) in order to drive it in an essentially linear reciprocating movement.

Abstract: A dead bolt lock automatically blocks the extended bolt to prevent externally-applied force from thrusting the bolt back into the lock case, and in the event of physical attack the lock responds by prolonging or perpetuating the dead bolt blocking condition. A push-pull lock has a bolt whose motion in both directions is stopped in response to detection of a rise in motor current above a certain level: a cushioning arrangement allows the current-limiting feature to be implemented without risk of damage to the motor, gear teeth or other drive components. A re-locker arrangement includes an angled flange that is part of a motor-supporting bracket; when forcibly pressed, the flange breaks plastic pins to release a spring-biased re-locker wire to block the bolt from being withdrawn, and when the wire is in the dead bolting position an extension of the re-locker wire engages a ridge in the lock's case to prevent the re-locker from being manipulated back to its original position.