Abstract: A dock leveler system includes a pivotal deck whose movement provides the impetus for moving a bumper between an operative position and a retracted position. The bumper is movable relative to the deck, so that after a truck bumps up against the bumper, the bumper can move below the deck to avoid creating an obstacle to a forklift or the like traveling on the deck. The moveable bumper can be disposed within the width of a dock leveler deck that encompasses the full-width of a truck bed. Of the various embodiments, some bumpers pivot underneath the deck, and others move straight up and down. In the operative position, some bumpers are flush with the top of the deck, and others protrude above the deck.

Abstract: A bottom hole assembly 10 for drilling a deviated borehole includes a positive displacement motor (PDM) 12 or a rotary steerable device (RSD) 110 having a substantially uniform diameter motor housing outer surface without stabilizers extending radially therefrom. In a PDM application, the motor housing 14 may have a fixed bend therein between an upper power section 16 and a lower bearing section 18. The long gauge bit 20 powered by the motor 10 may have a bit face 22 with cutters 28 thereon and a gauge section 24 having a uniform diameter cylindrical surface 26. The gauge section 24 preferably has an axial length at least 75% of the bit diameter. The axial spacing between the bit face and the bend of the motor housing preferably is less than twelve times the bit diameter. According to the method of the present invention, the bit may be rotated at a speed of less than 350 rpm by the PDM and/or rotation of the RSD from the surface.

Abstract: A high-pressure fuel injection pipe of doubled type, comprising: a thick outer tube; and an inner tube of made a metal and fitted in the outer tube to form a doubled pipe which is formed at its end portion with a connecting head having a face to be fitted on a seat of a mating partner. The outer tube is made of stainless steel or titanium, and the inner tube is formed of a thin metal having a high corrosion-resistance and a high strength and is doubled on the inner circumference of the outer tube throughout its entire length.

Abstract: A multiple-chain trenching machine comprises a prime mover with a trenching head assembly operably connected thereto, the head comprising: a) a frame operably connected to the prime mover at a proximal end; b) one or more pairs of proximal and distal primary sprockets mounted on the frame; c) a primary endless-chain digging assembly engaged around each pair of primary sprockets; d) one or more pairs of proximal and distal secondary sprockets mounted on the frame; e) a secondary endless-chain digging assembly engaged around each pair of secondary sprockets. The primary chains are substantially wider than the secondary chains, and trenching head is adapted so that each of the secondary chains produces a relief slot in the leading edge of the trench. The primary chains are driven in a forward chain direction, while the secondary chains may be driven in a forward or a reverse chain direction.

Abstract: The movable blade for attachment to a material moving machine is a generally rectangular blade for hinged attachment to a machine shovel, box grader blade or other similar device mounted on the machine. The movable blade angle of extension or retraction relative to the machine is controlled by a hydraulic cylinder, brace or other structural element. When the movable blade is extended outwardly at an angle relative to the machine the machine may be operated parallel to the material to be moved. This action relative to material positioned next to a ditch allows the operator to fill the ditch with material in a continuous operation along the ditch rather than requiring short movements at an angle to the ditch to move the material. The movable blade may also have a rotational mechanism to raise and lower the extension end for use in slope grading adjacent a roadway as an example.

Abstract: A dirt grading implement consisting of a mounting plate having a front side, a back side, a left side, a right side, and having a lower end, the back side of the mounting plate being adapted for removable attachment to the boom arm or lift arms of mobile earth moving equipment; a bar fixedly attached to the lower end of the mounting plate, the bar having a leftwardly extending section and a rightwardly extending section, the sections extending respectively leftwardly and rightwardly from the left and right sides of the mounting plate, the bar having a forwardly oriented face and a downwardly oriented dirt engaging face.

Abstract: A vehicle implement adapter for attachment to conventional vehicles and for allowing the attachment to the vehicle of various implement such as shovels, jaws or the like. The vehicle implement adapter includes a frame configured so as to be attachable to the vehicle. A main arm is pivotally attached to the frame. An implement such as a shovel, a pivotal jaw or the like is pivotally mounted at the distal end of the main arm. A cable is attached to the implement. The cable is re-directed by a set of pulleys and mechanically coupled to a winch-type mechanism mounted on the frame. A releasable locking mechanism is attached to the main arm. By selectively allowing and preventing pivotal movement of the main arm through the use of the arm locking mechanism, the cable can be used to lift and/or tilt the implement.

Abstract: A combination trencher (10) and vehicle (11) is disclosed wherein the tractor (11) has a pair of mounting rods (23) and a mechanically driven transfer case (20) with a rotating hub (25) extending from the front of the vehicle. The trencher (10) has a frame (31) which includes two generally parallel mounting members (32) sized and shaped to receive the mounting rods (23) of the tractor (11), and a hydraulic digging attachment (39). The digging attachment (39) has a pivotal cutting boom (41), an endless loop digging chain (42), a hydraulic boom actuator (44), and a hydraulic chain drive (45). The hydraulic chain drive (45) includes a hydraulic motor (51) mounted to the cutting boom (41) which drives the digging chain (42). The hydraulic motor (51) is in fluid communication with the hydraulic pump (52) through a hydraulic control system (53).

Abstract: A snow grooming apparatus and system for grooming snow barriers and elements. The apparatus has an inlet to accept the snow, and at least one smoothing member attached to the rear of the inlet. The smoothing members are dimensioned to pass over the snow formed by the inlet and to smooth at least one side of the snow such that the resulting barrier has at least one substantially smooth side. The system includes the snow grooming apparatus attached to a blade of a snow grooming vehicle.

Abstract: Downhole flow pulsing apparatus comprises a housing (14) for location in a drillstring, the housing (14) defining a throughbore to permit passage of fluid through the housing. A valve (27, 30) is located in the bore and defines a flow passage (29, 31). The valve includes a valve member (27) which is movable to vary the area of the passage (29, 31) to provide a varying fluid flow therethrough. A fluid actuated positive displacement motor (15, 16) is associated with the valve member (27). In a preferred embodiment, the apparatus is provided in combination with a drill bit (5) and a pressure responsive device, such as a shock-sub (3), which expands or retracts in response to the varying drilling fluid pressure created by the varying flow passage area. The expansion or retraction of the shock-sub (3) provides a percussive effect at the drill bit.

Abstract: An attachment for an all terrain vehicle (ATV) which enables the ATV to be used for clearing away snow and other loose granular material, such as sand, earth, and crushed stones. The apparatus includes a blade with a detachable liner, and a frame which fits beneath the ATV and is releasably connected to the outer sides of the ATV by a mounting device. The angle of the blade may be adjusted using a dual-handed lever. The blade may be raised and lowered by the driver while seated at the ATV using a handle which actuates a lever and a cable and pulley apparatus.

Abstract: A method for extracting and grading or sizing sand, gravel or a mixture thereof, from a pit formed in untouched ground. Liquid is sprayed into the ground, resulting in a fluidized state in the ground, in which state sand or gravel with a relatively high relative density and/or relatively large dimensions moves downwards, and sand or gravel material with a relatively low relative density and/or relatively small dimensions moves upwards. Thus a pit is formed in the ground which contains fluidized sand or gravel, in such a manner that a layered state is obtained. The layer of sand or gravel with a specific relative density and/or size is sucked out, while the remaining fluidized material remains behind in order to stabilize the wall of the pit. The material which has been sucked out is fed to a grading device or sizing device.

Abstract: The apparatus for attaching an accessory to an excavator is a device for attaching a grader blade, brush blade, compactor, or other accessory to the bucket of an excavator. The apparatus has a body to which the accessory is attached which has a pair of hooks which slide between adjacent pairs of teeth on an edge of the excavator bucket and a pair of chains attached to the rear of the bucket and tightened by load binders to retain the apparatus on the excavator bucket. The apparatus provides for pivoting the accessory laterally, and may optionally provide for tilting the accessory in a vertical plane.

Abstract: An excavating bucket mountable on the handle of an excavating machine generally consisting of a pair of side walls; an upper wall interconnecting such side walls; a downwardly and forwardly curved rear wall merging into a forwardly curved bottom wall, interconnecting such side walls and providing a transversely disposed cutting edge; at least one ripping tooth mounted on the rear wall, projecting rearwardly and having a curved lower edge merging with the curvature of the rear and bottom walls to provide a substantially continuous curved line; and mounting brackets for detachably connecting to the bucket to the handle of the machine.

Abstract: A snow plow assembly broadly comprises a snow plow blade, a frame for mounting the snow plow blade to a vehicle, and a boom connected to the frame and the snow plow blade. The assembly also includes a lift system for raising and lowering the boom, which lift system includes a lift cable attached to the frame and the boom. The assembly also includes a system for maintaining the lift cable taut so that the snow plow blade remains substantially level during use.

Abstract: A highway crash cushion provides a system response profile that reduces the stopping distance of an impact event. This crash cushion includes a frame that forms at least two bays arranged one behind another in an anticipated impact direction. The frame includes at least three transverse frames and side frames extending between adjacent transverse frames. Each of the side frames is outwardly bowed and includes first and second side frame elements coupled to the respective transverse frames, and a hinge coupled between the first and second side frame elements. At least one energy absorbing element is disposed in one of the bays, and at least first and second restraints are coupled to the side frames to resist movement of the hinges at an early stage in an impact event.

Abstract: A tip of a tooth assembly for a ground engaging implement or bucket is constructed with a necked down portion to provide the tip with a reduced cross-section sufficient to cause the tip to fail at the necked down portion when the tip is subjected to a sufficiently large vertical load in order to prevent the breakage of an adapter on which the tip is mounted. The tip also has side ears with side surfaces that are disposed at a slight angle relative to their mating side surfaces of the adapter ear pockets so as to diverge away from the side surface of their respective ear pocket. This construction prevents the distal ends of the ears from contacting the side surfaces when the tip experiences high side or lateral loads in order to alleviate lateral loads from being exerted on the distal ends of the ears through lateral contact with the adapter.

Abstract: A collapsible, portable ramp assembly, made of light weight materials and of a unitized construction whereby all components are a permanent part of the assembly, and which can be quickly and easily deployed to form a sturdy ramp for a variety of uses. The central, load-bearing portion of the ramp is formed by many light weight, transversely positioned slats, pivotally connected to one another by several flexible straps. Rigid support of the central ramp portion is provided by a pair of strong, light weight braces that simply rotate into a longitudinal position along the ramp sides from their position along the ramp end pieces.

Abstract: A slopeboard mounting linkage that raises a slopeboard while also raising and moving a fluid-powered cylinder toward the longitudinal center of the bulldozer to which the cylinder and slopeboard are attached. One end of a rod extending from the cylinder is rotatably attached to the slopeboard as is also one end of a link arm. The other ends of the cylinder and of the link arm are rotatably attached to an angled link that is rotatably attached to the back of the primary push blade of the bulldozer. And the inside edge of the slopeboard is rotatably attached to a long arm of the bulldozer.

Abstract: An excavation bucket incorporating an impact actuator assembly including a bucket body, a movable floor portion and an impact actuator provided between and mounted to the bucket body and the movable floor portion is described herein. The movable floor portion is longitudinally movable in the bucket body. When activated, the impact actuator assembly generates longitudinal impacts onto the movable floor portion to cause the repetitive longitudinal movements of the floor portion with respect to the bucket body. A forward edge of the floor portion is provided with tools such as teeth to penetrate hard soils.