A centre biased actuator (10) comprising: an outer cylinder (102); a slave cylinder (14) linearly transposed within the outer cylinder; a rod assembly (120, 122), the piston (122) of which is linearly transposed within the slave cylinder and the rod (120) of which extends from the outer cylinder; one or more first dynamic seals (121) arranged to act on a sidewall of the rod to inhibit hydraulic fluid leaking from the outer cylinder; one or more second dynamic seals (117) arranged to act on a sidewall of the slave cylinder or an inner surface of the outer casing to inhibit hydraulic fluid leaking from the outer cylinder; and a gas chamber (13, 23) comprising a sealed expandable chamber (14, 24) containing gas, the expandable chamber being arranged to act on hydraulic fluid within the centre biased actuator to bias the centre biased actuator to assume an intermediate condition which lies between a compressed condition and an extended condition.
CENTRE BIASED ACTUATOR
ZENTRUMSVORGESPANNTER AKTUATOR
ACTIONNEUR POLARISÉ CENTRAL
2021-09-29
Patent
Electronic Resource
English