Releasable locking device

A releasable locking device for securing a parked vehicle to an adjacent structure, said device comprising a first means provided with a first member fixedly mountable on the structure, a carriage mounted on said first member for limited relative vertical movement from a predetermined normal elevated rest position upon a depressing exterior force exceeding a predetermined magnitude being applied to said carriage, and an elongated unit having one end thereof pivotally mounted on said carriage;

• second means provided with a piston-cylinder assembly substantially concealed within said carriage, said assembly having a cylinder spaced from the elongated unit and having one end of the cylinder pivotally connected to said carriage beneath the unit pivotal axis, and a piston protruding from said cylinder and having an exposed portion operatively engaging said elongated unit when the latter is in said operative mode, the operative engagement between the piston exposed portion and the elongated unit including a lever pivotally connected to the carriage at a location intermediate the pivotal axes of said unit and said cylinder, the lever pivotal axis being substantially parallel to the unit pivotal axis, and means interconnecting the lever and piston exposed portion whereby movement of said piston in one direction effects movement of the lever whereby the elongated unit is moved thereby to an operative mode;
• and fluid power means for actuating the piston, said power means provided with a remotely disposed manually operable pump means, and an elongated, flexible, pressure-transmitting means interconnecting the cylinder and said pump means.