Abstract: The water wave-based energy generator is a system for extracting usable mechanical energy from a body of water, such as an ocean. A support frame is provided having a central portion, which is suspended over the body of water, and a plurality of legs, extending downwardly therefrom. A pivotal frame is pivotally joined to the central portion of the support frame and has a planar sheet mounted on a lower end thereof. The planar sheet is at least partially suspended in the body of water so that waves in the body of water cause rotation of the planar sheet and the pivotal frame with respect to the support frame. An elongated rod is pivotally joined at a proximal end thereof to the pivotal frame so that rotation of the pivotal frame generates lateral movement in the elongated rod. The lateral movement of the distal end of the elongated rod may be used to drive an external mechanically driven system.

Abstract: A vibrating portable screed of the type made up of sections having screed blade means at the base and a ridge portion at the top employs a turnbuckle assembly in the ridge portion held together by a removable pin and other removable pin connected means in the base portion thereby enabling the sections to be quickly assembled and disassembled by installing and removing the pins.

Abstract: A frame member for use as a portion of an open portable vibrated screed frame comprises a length of metal rod with metal tubes spaced along the length of the rod and bent in a zig-zag configuration such that each tube and a portion of the rod within each tube is bent together thereby providing a means for securing the frame member by welding to the tubes rather than directly to the rod material.

Abstract: A braking system for a dumping vehicle having a hydraulic drive system and a hydraulic dump container is disclosed. A two-section control valve is connected by conduit to a hydraulic fluid reservoir and a hydraulic motor. The control valve includes a first valve assembly for controlling the dump container and a second valve assembly for controlling operation and direction of the hydraulic motor. An anti-cavitation valve and relief valve are provided to prevent locking of the vehicle wheels during braking. Walk-behind, riding-step and riding-seat variations of the invention vehicle are disclosed.

Abstract: A distributor frontally mountable on a screed to minimize or eliminate the manual distribution and leveling of freshly poured concrete which is otherwise required prior to screeding. The distributor comprises a rotatable body bearing an array of circumferentially and axially staggered plate elements. The plate elements may be swept back and are staggered so that only selected ones of the plate elements in the array are in contact with the wet concrete at any point in time of operation, with the direction of travel of the plate elements being toward the screed in the upper quadrants of rotation of the rotatable body, and away from the screed in the lower quadrants of rotation.

Abstract: The present mounting apparatus includes a pair of retaining tabs secured to an upper surface of a blade adjacent leading corners. Each retaining tab includes a side wall, an end wall and a cover plate which forms a cavity with the blade upper surface. A pair of retaining tabs are secured to the upper surface of the blade adjacent trailing corners. The four retaining tabs cooperate to removably secure the blade to a trowel finishing blade without the use of mechanical fasteners.

Abstract: The present mounting apparatus includes a pair of retaining tabs secured to an upper surface of a blade adjacent leading corners. Each retaining tab includes a side wall, and end wall and a cover plate which forms a cavity with the blade upper surface. A pair of retaining tabs are secured to the upper surface of the blade adjacent trailing corners. The four retaining tabs cooperate to removably secure the blade to a trowel finishing blade without the use of mechanical fasteners. Spring-type retaining clips can be utilized with the tabs to further secure the blade to a trowel finishing blade.

Abstract: A portable vibrating screed includes a driven, vibratory rotatable shaft assembly mounted on an elongated frame equipped with means for screeding concrete. The shaft assembly includes a plurality of bearing assemblies spaced along the length of the shaft. Each bearing assembly includes a pair of separate bearing elements mounted on the shaft and supported in bearing supports secured to the frame. Failure of any single bearing element allows a companion bearing element in the same assembly to absorb all of the load imposed on such assembly to prevent shutdown and without impairing the needed vibration.

Abstract: The present invention includes a concrete screed frame having a first screed blade, a second screed blade and a camber top member arranged in a triangular cross section. A plurality of frame supports are transversely mounted between the first and second screed blades. A plurality of braces are mounted between the top camber member and the first and second screed blades. A telescoping tube assembly having a first tube and a second tube is mounted transversely between the first and second screed blades at the approximate midpoint of the length of the frame. A pin selectively fixes the relative position of the first and second tubes. Elongated structural means illustrated as a chain assembly is mounted to a screed blade and a tube to stiffen the screed frame and provides a chain-formed truss with the screed frame.

Abstract: A pumping apparatus is formed by a flexible, metal wall structure surrounding and defining a hollow interior chamber and with a mechanism to compress and expand the structure to create a pumping action through an opening to the chamber. The pumping apparatus forms part of an overall system particularly adapted for pumping abrasive liquids.

Abstract: A concrete screed comprising an elongate frame with a first longitudinally extending screed plate connected to a leading portion of the frame, and a second longitudinally extending screed plate connected to the frame rearwardly of the first screed plate. A plow body is mounted on the frame in close proximity to the first screed plate and presents discrete surface portions, comprising: (i) a first generally horizontal surface portion, extending forwardly from the vicinity of the first screed plate to a front leading edge and generally horizontally aligned with the first screed plate, and (ii) a second surface portion integrally joined to the front leading edge of the first surface portion and extending upwardly therefrom to an upper edge. Means are coupled to the frame for translating it along concrete to be screeded, whereby the first and second screed plates and plow body are brought into operative screeding engagement with the concrete.

Abstract: A concrete screed comprising an elongated beam with top and bottom flat surfaces joined to an intermediate hollow, tubular cylindrical section, formed of a plurality of interconnected separable beam units. Each adjacent pair of beam units is interconnected by a tongue body of a size and shape adapting it to closely fit within passages at end portions of the adjacent beam units, such passages being formed corporately by the bottom flat plate, the tubular section, and generally vertical ribs joining the bottom plate portion to the tubular section. The tongue body is secured to each of the adjacent beam units, with its respective ends disposed within the respective passages of the adjacent beam unit. The screed comprises means for imparting vibrations to the second plate portion, and a handle connected to the first plate portion.

Abstract: A concrete troweling machine is illustrated as having two sets of troweling blades with a mechanism for setting the tilt of individual blades in a rotor assembly and a separate mechanism controlled by the handle position for progressively changing the tilt of individual blades during each rotation of each set of blades to generate blade reactive forces for propelling the machine in selected direction.

Abstract: A material spreader for handling both rock and powder-like materials incorporates a hopper assembly with a hydraulically motor driven side discharge as compared to the conventional bottom discharge. The hopper assembly in one embodiment is supported directly above the surface being covered by hydraulically motor driven wheeled frames and in another embodiment is supported by a carriage on a bridge spanning the work surface. A gasoline engine driven hydraulic system mounts on and moves with the hopper assembly during spreading and includes a mechanism for automatically reversing the direction of travel.

Abstract: A lightweight and portable screed utilizes an extruded beam element as the principal structural element. The extruded beam element provides a mounting surface for both a handle and a gasoline engine, a housing for a vibrating shaft driven by the engine, a screed surface vibrated by the shaft and support surfaces for supporting the ends of the screed on forms.

Abstract: A motorized dump-type vehicle is provided having a chassis frame, a gasoline engine mounted on said frame, a dump container pivotally mounted on the front of said frame and a hydraulic system enabling said container to be raised and lowered by a hydraulic cylinder and said vehicle to be driven in either forward or reverse directions and braked by hydraulic drive motors. The hydraulic fluid is cooled by an oil reservoir tank forming a structural part of the frame and positioned such that heat from the hydraulic fluid can dissipate itself in the container and its contents.

Abstract: A motorized dump-type vehicle is provided having a chassis frame, a gasoline engine mounted on said frame, a dump container pivotally mounted on the front of said frame and a hydraulic system enabling said container to be raised and lowered by a hydraulic cylinder and said vehicle to be driven in either forward or reverse directions and braked by hydraulic drive motors. The hydraulic fluid is cooled by an oil reservoir tank forming a structural part of the frame and positioned such that heat from the hydraulic fluid can dissipate itself in the container and its contents.