Patent ID: 11932364
Assignee: SUNSTREAM CORPORATION
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 27:
28. A watercraft lift apparatus for lifting and lowering a watercraft having at least left and right side pontoons, comprising:
a substantially rectangular base frame including a rearward lateral beam, a forward lateral beam, a longitudinal left side beam, and a longitudinal right side beam;
a left side rearward lifting arm having a lower end portion pivotally attached to the base frame and an upper end portion;
a right side rearward lifting arm having a lower end portion pivotally attached to the base frame and an upper end portion;
a left side forward lifting arm having a lower end portion pivotally attached to the base frame and an upper end portion;
a right side forward lifting arm having a lower end portion pivotally attached to the base frame and an upper end portion;
a left side watercraft support having a rearward end portion pivotally connected to the upper end portion of the left side rearward lifting arm, and a forward end portion pivotally connected to the upper end portion of the left side forward lifting arm;
a right side watercraft support having a rearward end portion pivotally connected to the upper end portion of the right side rearward lifting arm, and a forward end portion pivotally connected to the upper end portion of the right side forward lifting arm;
a left side actuator having a lower end portion pivotally attached to the base frame and an upper end portion pivotally attached to the left side rearward lifting arm;
a right side actuator having a lower end portion pivotally attached to the base frame and an upper end portion pivotally attached to the right side rearward lifting arm;
a left side rearward leg socket attached to the base frame;
a left side forward leg socket attached to the base frame;
a right side rearward leg socket attached to the base frame;
a right side forward leg socket attached to the base frame;
a left side rearward leg positioned within the left side rearward leg socket;
a left side forward leg positioned within the left side forward leg socket;
a right side rearward leg positioned within the right side rearward leg socket;
a right side forward leg positioned within the right side forward leg socket;
a removable fastener preventing longitudinal movement of the left side rearward leg within the left side rearward leg socket;
a removable fastener preventing longitudinal movement of the left side forward leg within the left side forward leg socket;
a removable fastener preventing longitudinal movement of the right side rearward leg within the right side rearward leg socket;
a removable fastener preventing longitudinal movement of the right side forward leg within the right side forward leg socket;
a set bolt selectively inwardly adjustable to apply a lateral force on the left side rearward leg to prevent lateral movement of the left side rearward leg within the left side rearward leg socket;
a set bolt selectively inwardly adjustable to apply a lateral force on the left side forward leg to prevent lateral movement of the left side forward leg within the left side forward leg socket;
a set bolt selectively inwardly adjustable to apply a lateral force on the right side rearward leg to prevent lateral movement of the right side rearward leg within the right side rearward leg socket; and
a set bolt selectively inwardly adjustable to apply a lateral force on the right side forward leg to prevent lateral movement of the right side forward leg within the right side forward leg socket;
wherein the left side watercraft support has a rearward support with an upwardly opening Y-shape and a forward support with an upwardly opening Y-shape, which in combination are positioned to support the left side pontoon, and the right side watercraft support has a rearward support with an upwardly opening Y-shape and a forward support with an upwardly opening Y-shape, which in combination are positioned to support the right side pontoon, the rearward and forward supports of the left side watercraft support being in longitudinal alignment and at least one of the rearward and forward supports of the left side watercraft support being selectively longitudinally movable relative to the other of the rearward and forward supports of the left side watercraft support and securely retainable in the selected positions during use of the watercraft lift, and the rearward and forward supports of the right side watercraft support being in longitudinal alignment and at least one of the rearward and forward supports of the right side watercraft support being selectively longitudinally movable relative to the other of the rearward and forward supports of the right side watercraft support and securely retainable in the selected positions during use of the watercraft lift.