A LINEAR ACTUATOR WITH SELF-LOCKING SPINDLE

WIPO Patent Application WO2004027290

A3

An actuator, preferably a linear actuator for furniture, comprises a brake spring (20) in the form of a helical spring having a plurality of windings wound around a cy­lindrical element (10) of plastics rotatable at least during braking, said spring being tightened around the cylindrical element for braking. The frictional heat gen­erated hereby can cause the plastics to be deformed, which adversely affects the braking power. This is solved by providing the cylindrical element (10) consisting of plastics with an insert (12) of metal for carrying off the frictional heat preferably into other metal parts of the actuator that may serve as cooling faces. To carry off heat additionally, it is proposed to arrange a second heat-conducting element (18) in intimate contact with the outer side of the spring (20), said element be­ing likewise connected with other metal parts of the actuator that may serve as cooling faces.

WO/1998/050709	SERPENTINE DRIVE SYSTEM WITH IMPROVED OVER-RUNNING ALTERNATOR DECOUPLER
JP4648304	Bidirectional drive
JP2006517642	Spring clutch

BASTHOLM JEPPE CHRISTIAN (DK)
WESTERMANN KARSTEN (DK)

PCT/DK2003/000611

April 22, 2004

September 22, 2003

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LINAK AS (DK)
BASTHOLM JEPPE CHRISTIAN (DK)
WESTERMANN KARSTEN (DK)

F16D41/20; F16H25/20; F16D65/28; F16H25/24; (IPC1-7): F16H25/20

EP0662573A1	1995-07-12
DE29606367U1	1996-08-01
US4246991A	1981-01-27

TOOTEN K H ET AL: "STAND DER ENTWICKLUNG UND EINSATZMOEGLICHKEITEN VON LASTMOMENTSPERREN", ANTRIEBSTECHNIK, KRAUSSKOPF VERLAG FUR WIRTSCHAFT GMBH. MAINZ, DE, vol. 32, no. 1, 1993, pages 57 - 61, XP000338549, ISSN: 0722-8546

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