Abstract: A multi-function joystick system controls forklift mast, tilt and fork functions. The system includes a single joystick pivotable about two axes and having first, second and third buttons and a trigger. Combinations of pivoting the joystick alone or in combination with pressing buttons and triggers performs eight forklift functions including negative lift/lower, free lift/lower, maximum lift/lower, tilt forward/backward, left fork left/right, right fork left/right, both forks left/right, and fork open/close.

Abstract: An improved slider scissor lift results in forward or backward movement of a raised work platform. The forward or backward movement is achieved by positioning upper pins and sliders oppositely from lower pins and sliders. This oppositely pinned configuration results in an operation whereby the base of the scissor lift is moved toward the rear of the base platform and the work platform is drawn toward the rear of the scissor lift.

Abstract: A gusseted torsion system minimizes torsional deflection in an open frame vehicle having a generally U-shaped frame with two generally parallel beams. The gusseted torsion system includes cross members extending between the parallel beams and gussets adjacent each end of the cross members. The gussets are affixed to the parallel beams to counter torsional forces created by loads exerted on the parallel beams.

Abstract: An electronic steering system for a vehicle includes a generally freely rotating steering column, a sensor for determining a rotational position of the steering column and a controller for turning tires on the vehicle based upon the rotational position of the steering column. When the vehicle is switched to one of various steer modes the controller electronically resets the rotational position of the steering column to a zero rotational position without physically turning the steering column. A steering brake limits over-rotation of the steering column to prevent the tires on the vehicle from turning beyond a safe distance. The controller electronically resets the rotational position of the steering brake when the steer mode is changed.

Abstract: A boat lifting and stacking vehicle having a low profile frame, a carriage connected to a frame via a transverse I-beam track, a mast having a pair of forks protruding therefrom, and a hydraulic suspension system. The vehicle further includes an operating console that moves transversely and vertically with the carriage for enhanced operator visibility. Additionally, the vehicle does not require extra counterweights as the length of the frame and location of the engine equipment and fuel tanks provide adequate rotational balance for even the heaviest boat loads during the boat storage process. Moreover, the front wheel bases include a pair of deployable hydraulic cylinders that work in combination with the wheels as a weight distribution means. For proper loading and unloading alignment, a variety of steering options are available via the computer operated controls.

Abstract: A process for monitoring load conditions on a lifting machine having a rated load moment includes determining an actual load moment of the lifting machine due a weighted load. The actual load moment may be determined by measuring a tilt pressure within a hydraulic tilt cylinder of the lifting machine, and then calculating the actual load moment from the tilt pressure within the hydraulic tilt cylinder. The location of a center of gravity of the weighted load is also determined by measuring a lift pressure within a hydraulic lift cylinder of the lifting machine, and then calculating the weight of the weighted load from the lift pressure. Once the weight is determined, the location of the center of gravity of the weighted load may be found using the actual load moment and the calculated weight.

Abstract: A process for monitoring load conditions on a lifting machine having a rated load moment includes determining an actual load moment of the lifting machine due a weighted load. The actual load moment may be determined by measuring a tilt pressure within a hydraulic tilt cylinder of the lifting machine, and then calculating the actual load moment from the tilt pressure within the hydraulic tilt cylinder. The location of a center of gravity of the weighted load is also determined by measuring a lift pressure within a hydraulic lift cylinder of the lifting machine, and then calculating the weight of the weighted load from the lift pressure. Once the weight is determined, the location of the center of gravity of the weighted load may be found using the actual load moment and the calculated weight.

Abstract: A rebound-type exercise device is provided which allows an individual to perform a sit and bounce exercises that, among other things, stimulate the lymphatic circulation. The exercise device includes a support frame which supports a seat assembly by means of four springs. The support frame includes a pair of laterally spaced apart side support frames which are interconnected by a head tube. Each side support frame includes a generally horizontal ground-engaging base tube, a rearwardly disposed, generally vertical rear support tube extending upwardly from the base tube, and a generally L-shaped arm which interconnects a front portion of the base tube with the upper end of the rear support tube.

Abstract: A seawater hydraulic rock drill having a trigger which when engaged by a diver allows pressurized seawater to be directed through an open supply poppet valve assembly into a drive chamber having a plunger. The pressurized seawater drives the plunger into a piston, an anvil, and a drill bit creating a percussive impact into a rock surface breaking up the rock surface. At the same time pressurized seawater exits the drive chamber through an orifice into a reversible seawater hydraulic motor which rotates the drill bit thereby pulverizing the broken rock. As the plunger approaches the end of a drive cycle, the supply poppet is pressurized closing the supply poppet valve assembly and cutting off the flow of seawater to the drive chamber. Pressurized seawater then drives the piston and plunger to their initial positions, the supply poppet valve assembly opens, and the cycle is repeated.

Abstract: A string tension transmitting device positionable against an outwardly facing head frame surface of a stringed sports racket. The tension transmitting devices receive and support the racket string thereover. The devices are adapted to the head frame surface to form a rocking relation therewith. Relatively greater tension in one string chord can be transmitted through the tension transmitting device to an associated string chord. Such transmission of tension allows strain energy to be stored in several string chords in addition to chords directly contacted by the ball or other impacting object. This results in a larger overall deflection of the string face of the racket and a lower peak dynamic string tension. The tension transmitting device includes rocker members that can be received between the string and racket head as it wraps over the outer racket head surface. The rockers receive the string along string receiving surfaces such as grooves formed in top surfaces of the rocker members.

Abstract: The present invention makes use of tension transmitting device between an outward head frame surface and string chords such that tension along one string chord can be transmitted through the tension transmitting device to the next adjacent string chord. Transmission of tension allows strain energy to be stored in several string chords instead of only those directly contacted by the impacting object. This results in larger string deflection with a smaller increase in string tension. A first form of the tension transmitting device is an independent rocker member that can be received between the string as it wraps over the outer racket head surface between adjacent holes. The rockers receive the string along top rocker surfaces. Bottom rocker surfaces are substantially cylindrical for friction-free rocking engagement against the outer surface of the racket head frame.