Patent ID: 8777513

Claim:
A boat lift comprising: a first elongated member disposed generally along a first horizontal axis; a second elongated member disposed generally along a second horizontal axis, the second horizontal axis being generally parallel to and at the same general elevation as the first horizontal axis; a boat lifting platform disposed below the first and second elongated members, the boat lifting platform having a front right portion, a front left portion, a rear right portion and a rear left portion, the boat lifting platform having a lowered position below a waterline and a raised position above the waterline; a first hydraulic cylinder operatively attached to the first elongated member; a second hydraulic cylinder operatively attached to the second elongated member; at least a first flexible line operatively connected to the first hydraulic cylinder and to the front right portion of the boat lifting platform and to the rear right portion of the boat lifting platform, the first hydraulic cylinder having a first position corresponding to the lowered position of the boat lifting platform and a second position corresponding to the raised position of the boat lifting platform; at least a second flexible line operatively connected to the second hydraulic cylinder and to the front left portion of the boat lifting platform and to the left rear portion of the boat lifting platform, the second hydraulic cylinder having a first position corresponding to the lowered position of the boat lifting platform and a second position corresponding to the raised position of the boat lifting platform; a source of pressurized hydraulic fluid to for selectively moving the first and second hydraulic cylinders between their respective first and second positions thereof for causing a corresponding change in the position of the boat lifting platform between the lowered position and the raised position thereof; and wherein the source of pressurized hydraulic fluid for the first and second hydraulic cylinders comprises a synchronized tandem hydraulic power unit which simultaneously delivers substantially the same amount of fluid to each of the first and second hydraulic cylinders in a synchronized fashion.