Patent ID: 7587956

Claim:
A device for controlling motion of an object, comprising: a housing defining a first cavity, a second cavity and a third cavity each extending from a first longitudinal end to a second longitudinal end of the housing, the third cavity being disposed on an opposite side of the first cavity relative to the second cavity, the housing including a partition separating the first cavity and the second cavity, and the housing including an additional partition separating the first cavity and the third cavity; a first sliding member movable within the first cavity, the first sliding member including a first extension extending outwardly from the first longitudinal end of the housing for being attached to the object whose movement is to be controlled; a second sliding member movable within the second cavity, the second sliding member including a second extension extending outwardly from one of the first and second longitudinal ends of the housing for being pulled a variably controlled distance away from the housing; a motion limiting member communicating with the first sliding member and the second sliding member, the motion limiting member being configured to cooperate with the first and second sliding members such that movement of the second extension of the second sliding member the variably controlled distance in a direction away from the housing causes the first extension of the first sliding member to be movable the variably controlled distance in the direction in which the second sliding member is pulled; a third sliding member movable within the third cavity, the third sliding member including a third extension extending outwardly from the other of the first and second longitudinal ends of the housing, relative to the second extension, for being pulled a variably controlled distance; and an additional motion limiting member communicating with the first sliding member and the third sliding member, the additional motion limiting member being configured to cooperate with the first and third sliding members such that movement of the third extension of the third sliding member the variably controlled distance in a direction away from the housing causes the first extension of the first sliding member to be movable the variably controlled distance in which the third sliding member is pulled.