Discrete step rotary actuator

Details Discrete step rotary actuator Discrete step rotary actuator

2006-07-18

2006-07-18

Nguyen, Hoang (Department: 3748)

Power plants

Motor operated by expansion and/or contraction of a unit of...

Mass is a solid

C060S528000

Reexamination Certificate

active

07076951

ABSTRACT:
A discrete step rotary actuator (1) comprises a stator (2), a rotor (3) and at least an actuating element (10) made with a shape memory active material, the actuating element (10) having a first portion (11) anchored to said stator and a second portion with a terminal element (12). The rotor has a sequence of seatings (14) arranged as a circumference, into which the terminal element (12) can engage in a sequential way. Elastic means (13) placed between the actuating element (10) and the stator (2) induce the shift of the terminal element (12) between two consecutive seatings (14), during the passage of the active material from its shortened to its extended configuration. The passage of the active material from the extended configuration to its shortened configuration imparts the rotor (3) a rotation couple with respect to the stator (2).

REFERENCES:
patent: 1607505 (1926-11-01), Bentley
patent: 1952197 (1934-03-01), Davis
patent: 5018874 (1991-05-01), Weynant nee Girones
patent: 5543678 (1996-08-01), Hoiberg
patent: 5955801 (1999-09-01), Romero et al.
patent: 6242841 (2001-06-01), Williams
patent: 6429573 (2002-08-01), Koopmann et al.
patent: 6530217 (2003-03-01), Yokota et al.
patent: 196 19 115 (1997-11-01), None

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