Patent ID: 6327992
Filing Date: 2001-12-11
Classification: B63B

Abstract:
An improved hydraulic watercraft lift apparatus mounted to the transom of a boat, the apparatus having a transom bracket with parallel side plates enclosing a power cylinder hydraulically moving a pair of parallel inboard and a pair of parallel outboard lift arms, connecting to a platform bracket supporting a platform, the improvement wherein:(a) a groove on a lock plate operated by a lock cylinder adjacent the transom bracket engages a transverse projection on an outboard lift arm to lock the lift apparatus in an upright out of the water position;(b) a first transverse pin passing through proximal end bores on the parallel inboard lift arms and extending outwardly beyond the inboard lift arms to stop downward movement of the outboard parallel lift arms;(c) a second transverse pin passing through a coupler attached at the end of a downwardly descending rod operated by the power cylinder, and the second transverse pin further passing through intermediate bores on the parallel inboard lift arms; and(d) grooves on a side plate on each side of the transom bracket engaging the first transverse pin to limit travel of the lift apparatus to prevent over center travel of the lift arms.