Actuator

Details Actuator Actuator

2006-11-21

2006-11-21

Kramer, Devon (Department: 3683)

Brakes

Operators

Electric and mechanical

C188S162000, C188S171000

Reexamination Certificate

active

07137489

ABSTRACT:
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.

REFERENCES:
patent: 4246991 (1981-01-01), Oldakowski
patent: 6459182 (2002-10-01), Pfann et al.
patent: 296 06 367 (1996-09-01), None
patent: 0 662 573 (1995-07-01), None
patent: 0662573 (1995-07-01), None

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