Boat hoist apparatus

Claim 1

A BOAT HOIST APPARATUS COMPRISING A PAIR OF SPACED PARALLEL FRAME SIDE MEMBERS, WHEELS SUPPORTING THE SIDE MEMBERS FOR MOVEMENT OVER THE GROUND, A FIXED GANTRY CARRIED BY THE SIDE MEMBERS ADJACENT TO ONE END THEREOF AND INCLUDING A PAIR OF UPRIGHT COLUMNS CONNECTED BY A TOP BEAM, HOIST DEVICES CARRIED BY THE GANTRY ADJACENT TO THE JUNCTURE OF THE COLUMNS AND TOP BEAM, A PAIR OF UPRIGHT COLUMNS CONNECTED TO THE SIDE MEMBERS RESPECTIVELY ADJACENT TO THE OTHER ENDS THEREOF, HOIST DEVICES CARRIED BY THE LAST NAMED COLUMNS AT THEIR UPPER ENDS, A PAIR OF GATE MEMBERS HINGEDLY CONNECTED TO THE UPPER ENDS OF THE LAST NAMED COLUMNS RESPECTIVELY FOR SWINGING FROM AN ALIGNED CLOSED POSITION SPANNING THE SPACE BETWEEN THE COLUMNS TO AN OPEN POSITION, POWER MEANS CONTROLLABLE FROM A REMOTE POINT CONNECTED TO THE GATE MEMBERS TO SWING THEM, A SLEEVE SLIDALBY MOUNTED ON ONE OF THE GATE MEMBERS AND SLIDABLY MOUNTED ON ONE OF GATE MEMBER TO HOLD THE GATE MEMBERS IN ALIGNED POSITION, POWER MEANS CONTROLLABLE FROM A REMOTE POINT TO SLIDE THE SLEEVE, COOPERATING LATCH PARTS ON THE SLEEVE AND SAID OTHER GATE MEMBER TO LATCH THE SLEEVE AGAINST MOVEMENT, AND POWER MEANS CONTROLLABLE FROM A REMOTE POINT TO DISENGAGE THE LATCH PARTS SO THAT THE SLEEVE CAN BE SLID.