Patent ID: 8220592

Claim:
Linear motion brake for a race comprising, in combination: a housing adapted to be mounted for movement along a race in an operation direction, with the housing including a piston cavity; a piston reciprocally received in the piston cavity for reciprocal movement in a reciprocation direction perpendicular to the operation direction between a first operative position and a second operative position outwardly of the piston cavity in the reciprocation direction, with the piston being biased from the second operative position to the first operative position, with fluid pressure being introducible into the piston cavity against the piston for moving the piston from the first operative position to the second operative position; first and second brake shoes mounted for movement in a shoe direction perpendicular to the operation direction and to the reciprocation direction, with one of the piston and the first and second brake shoes including first and second camming surfaces and the other of the piston and the first and second brake shoes including first and second cam followers engaging with the first and second camming surfaces causing movement of the brake shoes in the shoe direction when the piston reciprocates in the reciprocation direction; and a shoe guide of a generally channel shape and secured to the housing, with the shoe guide including first and second leg plates and a connecting plate extending between the first and second leg plates, with the first and second leg plates including shoe bores extending in the shoe direction through the first and second leg plates for receiving the first and second brake shoes, with the piston being biased away from the connecting plate and with the piston being moved under fluid pressure towards the connecting plate.