Abstract: A boatlift leg and frame structure utilizing a ball screw lifting mechanism driven by a reversible electric motor to raise and loser a boat support carriage. The raising and lowering operation of the ball screw mechanism is controlled by electronic circuitry that includes wired and remote direction selection; lifting logic with conflict detection and direction reversal delay; lighting control logic; motor power control; and overload detection logic to detect lifting overload and disable power to the motor power control. A drive train mechanism converts high-speed low torque rotation of the motor drive shaft to low-speed high-torque rotation drive of the ball screw. A boatlift leveling mechanism associated with one or more legs of the boatlift includes a ground engaging footpad, an extendible leg, a height adjusting screw mechanism and a height adjusting actuator with mating bevel gears coupled to the height adjusting screw for allowing adjustment through the side of a boatlift leg.

Abstract: Trailer structure having a tilt limiting loading ramp and an improved structural side member forming an adjustable axle mount and having a load tie down track is described. The trailer has a load supporting bed and utilizes a load tie down system having tie down tracks at each side and one or more additional tie down tracks at selected locations on the load supporting bed. One or more tie down devices are selectively positionable in each tie down track and are used to restrain various loads including various wheel supported loads. To accommodate a low trailer profile an improved tongue adaptor is provided. A fender mount structure to cooperate with the improved structural side member is also described. Improved loading ramp structures, including a tilt-bed loading ramp a tilt limiting structure for limiting the angle of bed tilt for use on a tilt-bed trailer are shown. A rack structure to mount to the load tie down tracks in the structural side members is shown.

Abstract: Trailer structure having a tilt limiting loading ramp and an improved structural side member forming an adjustable axle mount and having a load tie down track is described. The trailer has a load supporting bed and utilizes a load tie down system having tie down tracks at each side and one or more additional tie down tracks at selected locations on the load supporting bed. One or more tie down devices are selectively positionable in each tie down track and are used to restrain various loads including various wheel supported loads. To accommodate a low trailer profile an improved tongue adaptor is provided. A fender mount structure to cooperate with the improved structural side member is also described. Improved loading ramp structures, including a tilt-bed loading ramp and a tilt limiting structure for limiting the angle of bed tilt for use on a tilt-bed trailer are shown. A rack structure to mount to the load tie down tracks in the structural side members is shown.

Abstract: The present invention features a boatlift leg and frame structure utilizing a ball screw lifting mechanism driven by a reversible electric motor to raise and loser a boat support carriage. The raising and lowering operation of the ball screw mechanism is controlled by electronic circuitry that includes wired and remote direction selection; lifting logic with conflict detection and direction reversal delay; lighting control logic; motor power control; and overload detection logic to detect lifting overload and disable power to the motor power control. A drive train mechanism converts high-speed low torque rotation of the motor drive shaft to low-speed high-torque rotation drive of the ball screw.

Abstract: An improved transport bed for use with trailers or the like and having improved clamp-down and tie-down structures is disclosed. A telescoping clamp-down device operable in conjunction with a retention channel mounted in the bed provides variably positioning capabilities of clamp-down. Slidable tie-down mechanisms can be utilized in the same retention track. Improved structural members for supporting and protecting the bed material are also disclosed.

Abstract: An improved trailer bed structure for use with trailers or the like and having an improved structural member. A bed structure having a least one bed member having a predetermined number of edges, with at least two support members joined in a predetermined configuration and a loading frame structure to support and protect the loading edge of the bed. The loading frame structure has a removable elongated member in cooperation with a frame member, each having mating structures to permit slidable removal and replacement of the removable elongated member.

Abstract: An improved modular dock structure with adjustable fixtures. Structural members are shown having one or more retention channels for cooperating with captive mounting structures various fixtures. Fixtures are adjustably mounted to the structural members using one or more mounting structures, each having a captive nut and collar retained in an associated retention channel. Fixtures described include a coupling hinge structure to couple modular sections together; floatation devices; clete structures; railings; watercraft bumpers; support legs; support legs with augers affixed; and support legs with wheels rotatably attached.

Abstract: An improved transport bed for use with trailers or the like and having improved clamp-down and tie-down structures is disclosed. A telescoping clamp-down device operable in conjunction with a retention channel mounted in the bed provides variably positioning capabilities of clamp-down. Slidable tie-down mechanisms can be utilized in the same retention track. Improved structural members for supporting and protecting the bed material are also disclosed.

Abstract: An improved tilt-bed trailer constructed of light weight and durable materials is disclosed. A trailer frame with an associated rotatably interconnected tongue is affixed with a tongue release and retention mechanism that slidably engages a portion of the tongue and a portion of the frame to hold them in a fixed position when engaged and to allow the frame to pivot with respect to the tongue when disengaged. The mechanism utilizes gripping members to cooperate with ridges on the tongue.

Abstract: An improved tilt-bed trailer constructed of light weight and durable materials is disclosed. A trailer frame with an associated rotatably interconnected tongue is affixed with a tongue release and retention mechanism that slidably engages a portion of the tongue and a portion of the frame to hold them in a fixed position when engaged and to allow the frame to pivot with respect to the tongue when disengaged. The mechanism utilizes gripping members to cooperate with ridges on the tongue. An adjustable axle mount has a pair of parallel support member having a predetermined configured channel in the lower surface of each, that slidably engage mating axle mount members therein. A locking mechanism allows positioning of the axle mount members selectably along the length of the channels.

Abstract: An improved portable ramp structure constructed of light-weight material and adapted for reliable and safe use with various transport vehicles is described. A plurality of pairs of longitudinal support members having longitudinal channels for mounting a predetermined number of cross members therebetween are shown, with ones of each of said pairs hingedly mounted to associated ones of other pairs, such the ramp may be longitudinally folded. Each of said pairs of members has a support member mounted at one end thereof for cooperating with some portion of a transport vehicle. Retention chains with associated hooks are described for removably attaching the ramp structure to the transport vehicle. The entire structure is comprised of components that are fabricated from extruded lightweight material, and cut to length for assembly.