Abstract: The board cutter includes a T-square and a knife. The T-square has a head with a board edge contact surface and a board face contact surface. A long leg of the T-square is attached to the head. A board face contact surface on the bottom of the long leg slides along a board face during use. A slider is slideable along a slot in the long leg and is clamped in any position along the slot. The knife is pivotally connected to the slider for pivotal movement about an axis that is parallel to the slot in the long leg. Penetration of the cutter into a board is controlled manually as the T-square is slid along surfaces of the board.

Abstract: A wood fragmenting rotor assembly has a drive shaft driving a series of radially projecting hammers. Replaceable fragmenting knives are removably secured to the leading portions of said hammers and have generally axially extending fragmenting edges. An impaling tool having a generally conical leading end is carried on the hammers radially inwardly of the edges to project a generally tangentially predetermined distance forwardly and provide an initial rigid work contacting portion ahead of and cooperating with the knife edges.

Abstract: A molding machine for a concrete mix includes a frame with a vibratible mold having a vertical through cavity with hollow cores extending downwardly in the mold cavity. A pallet receiver with a pallet thereon is movable upwardly to close the bottom of the cavity. Core tops have openings therein and ventilation pins are receivable to block air passage through the core top openings when the pallet is in mold closing position. Cups with bottom openings are in the cores below the top openings to receive and guide the pins and passageways around the pins permit suction-braking air to move past the pins to the cup bottom openings when the pins move downwardly away from the core top openings.

Abstract: A self-lubricating ballscrew has a screwshaft and a ballnut surrounding the screwshaft and provided with a re-circulating path for a plurality of balls which roll between the ballnut and the screwshaft when the ballscrew is in use. Lubrication means are in contact with the helical groove of the screwshaft to provide lubrication therefor. The self-lubricating means comprises a lubricant impregnated solid having an elongate portion which follows the path of and is received in the helical groove of the screwshaft. The cross-section of that portion is different from that of the said groove, so that the contact region between the said portion and the said groove coincides with the lines of contact between the balls and the screwshaft. The deposit of lubricant is thereby concentrated on those lines.

Abstract: A dual wheel foldable hand truck with a nose plate has a skeletal frame including laterally spaced vertical side rails. The frame has hingedly connected upper and lower frame sections with upper and lower side rails meeting at side rail interfaces. Handle operated lock slides are carried by the upper rail sections for downward sliding movement to releasably lock the frame sections in planar alignment. The foldable nose automatically locks in operative position when swung down from stowed position.

Abstract: A method of and apparatus for treating foam board to permit it to be accordion folded involves moving an elongate foam board along a longitudinal pathway into a slitting machine, stopping the travel of the board and clamping it in stationary position, and then laterally simultaneously moving pairs of longitudinally spaced upper and lower slitters, which produce alternate slits less than through the thickness of the board to leave a foldable thickness, across the board. The board is then released to be accordion folded.

Abstract: The screed form stake has a cradle portion with a horizontal top surface. A screed rod groove in the top surface extends from a front wall to a rear wall of the cradle portion. First and second side flanges extend downward from the cradle portion and have rear flange surfaces in a first vertical plane. A central flange is integral with the first and second side flanges, extends downward from the cradle portion, and extends forward from the first and second side flanges. A soil penetration point is formed on the bottom of the screed stake between the side flanges and the central flange. A stake driver has a bottom surface, that engages the stake top wall, and a top surface. A screed rod shaped member on the bottom of the stake driver is seated in the screed rod groove and has an exposed elevation measuring surface.

Abstract: The civil engineering elevation measuring stick for use in a laser elevation measuring system includes a primary pole with a top end, a bottom end at least four flat side walls. A top end cap, a bottom end cap are attached to the primary pole. A secondary tubular pole telescopically receives the primary pole. Bearings support the secondary tube for sliding movement relative to the primary pole between the top and bottom end caps. A laser beam receiver mounting surface is provided on the secondary tube. A measuring scale is fixed to the primary pole in a location that permits the direct measurement of the deviation between the elevation of a measured surface and desired grade surface.

Abstract: A method of combustion of a gaseous fuel in a heating appliance (1; 22) provided with at least one burner (15; 29; 34, 35, 36; 38), comprising mixing said gaseous fuel with a preestablished quantity of air to obtain an air-fuel mixture, supplying said mixture to the body of said at least one burner (15; 29; 34, 35, 36; 38), which is provided with a diffuser (19) on which openings (18) are made through which said mixture passes, causing the combustion of said mixture in order to generate flames (20; 32; 33; 34; 37; 42), the method further comprises irradiating heat towards said flames (20; 32; 33; 34; 37; 42) and a region directly surrounding said flames (20; 32; 33; 34; 37; 42).

Abstract: A device for mounting a plastic fuel tank on the body of a motor vehicle with a carrier which is shaped to fit at least partially to the outer contour of the tank and at least one coupling disposed between the carrier and the tank. The coupling is releasably connected with a snap fit to the carrier and preferably is made of a thermoplastic material that is heat welded to the plastic tank.

Abstract: A malleable high density polymer material having a high density metal component and a polymer phase consisting of a rigid or hard component, and an elastomeric modifier for the hard component, and where the elastomeric component is chosen from one of several narrow molecular weight distribution ethylene/alpha-olefin elastomers. One advantage of the present invention is to achieve a surprisingly malleable, high density material that has unusual melt properties which may be used as a lead substitute in the making of for example, projectiles, shot, or angling weights. Another advantage of the present invention is to provide a lead substitute that is non-toxic.

Abstract: An electro-hydraulic actuator system (10 or 140) includes a hydraulic actuator (27) having a pair of fluid filled chambers (29, 30) and being operable to provide an actuator output (12) as a function of fluid pressures at the chambers. An electric-hydrostatic actuator (34 or 141) includes an electric motor (35 or 142) responsive to motor control signals for providing an output to a motor shaft (40 or 150), one or more pistons (56 or 166, 170) coupled to the shaft, and one or more hydraulic housings (92 or 160, 162) mounted on the motor and cooperating with the pistons for providing a pair of fluid cylinders (54 or 164, 168) respectively coupled to the fluid chambers at the hydraulic actuator. A solenoid valve (33) is connected between the cylinders, and is responsive to valve control signals for feeding fluid between the actuator chambers and thereby short circuiting the hydrostatic actuator cylinders.

Abstract: A pump system is provided where low pressure (4) and high pressure (6) pumps are coaxially mounted to receive motive power from a shared drive (300). The drive shafts are arranged such that one extends within a void in the other and both have shear regions such that, in the event of torque overload, either shaft can shear so as to disconnect the drive to it's associated pump while the other pump and shaft can continue to work.

Abstract: A fuel level sensor for use with a vehicle fuel tank includes a magnet carrying float assembly that rises and falls with the fuel level to open and close various magnetically activated reed-switches located at different axial positions along a vertically extending electrical circuit. Activating a reed-switch located at a particular vertical position along the electrical circuit causes the overall resistance of the circuit to depend upon the position of the float assembly. The float assembly is capable of freely rotating about the vertical axis of the electrical circuit and carries magnets producing a horizontal magnetic field that can activate a reed-switch from any angular orientation of the float assembly. Thus, assuming the fuel level sensor is provided with a constant voltage source, the sensor is able to determine the fuel level by the amount of electrical current flowing through the circuit.

Abstract: A hydraulic power steering system includes a steering gear having a cylinder, and a piston slidably disposed in the cylinder to divide the cylinder into first and second cavities on opposed sides of the piston. A pair of turn tubes are coupled to the cylinder for connecting the cylinder cavities to a source of hydraulic fluid. An open fluid leakage path extends between the cylinder cavities or between the turn tubes. This open leakage path is sized to damp fluid pressure fluctuations and thereby reduce fluid-induced shudder in the steering system. The open fluid leakage path may comprise a valve or a passage extending between the turn tubes, a passage in the piston or in the seal between the piston and the gear housing cylinder, or a passage in a banjo block connected across the turn tube inputs to the gear housing.

Abstract: A hand truck with a generally upright skeletal frame carried on spaced apart wheels connected with the lower portion of the frame incorporates a noseplate and a pallet-supporting fork structure configured to enter a pallet. The noseplate and fork structure are carried on the frame to be interchangeably movable to and from vertically spaced operative positions projecting forwardly at generally right angles to the lower end of the frame and removed stowed positions generally vertically adjacent the frame.