摘要:
@ The hydraulic control apparatus includes an actuator (18) having an annular body (32) providing an annular piston chamber (41) therein and an annular piston (44) slidably reciprocable on the body, the actuator being pre-filled with hydraulic fluid and pre-tested prior to being installed on a structure. An annular elastomeric seal (43) is axially reciprocable within the piston chamber to move the piston the construction of the piston being such that a rear end thereof reaches into the piston chamber and abuts against the seal during functioning of the actuator. A movement restraining device (54) is provided for insertion on the body to take the place of the piston, the movement restraining device being constructed so that it is slidable on the body and so that a rear end thereof reaches into the piston chamber and abuts against the seat. The movement restraining device is forcefully held on the body, e.g. frictionally, to hold the seal against axial movement while the actuator is filled with hydraulic fluid. It is removed during installation of the actuator, e.g. in a vehicle, and replaced by the piston.
摘要:
@ Hydraulic control apparatus for actuating a remotely located mechanism having a shipping and installation restraining strap 42 for an actuator having a housing 25 and a linearly moveable output member 30 projection from the front end of the housing. The strap is non-elastic and rupturable and has a part 46 thereof engageable with the free end of the output member and another part projecting rearwardly toward the rear end of the housing. An elastic anchor arrangement 50 is provided for the restraining strap to allow full extension thereof without rupture of the strap. A stop and positioning arrangement 74, 76 is provided for the elastic anchor arrangement which predetermines the retracted position in which the output member is yieldably held, and an override arrangement 76, 23 is provided to selectively debar functioning of the elastic anchor arrangement whenever it is intended to rupture the restraining strap.
摘要:
The apparatus is primarily for operating a slave cylinder 18 of vehicle apparatus comprising a master cylinder 28 the slave cylinder 18 and a conduit 26 interconnecting the master and slave cylinders. The apparatus includes a connector 32 through which hydraulic fluid can pass and which comprises a pair of self sealing connector members 44, 46 which enable the cylinders to be interconnected through the conduit, the cylinders and conduit being filled with hydraulic fluid prior to installation in the vehicle. The slave cylinder may be integral or partly integral with a bell housing 14 for a friction clutch assembly or may be mounted on a transmission casing 15.