Abstract: A socket for holding a cutting bit is removably attached by one or more resilient pins to a base permanently secured to a rotor. The pins are inserted through partially aligned openings in the socket and base and are radially expandable to bias load bearing surfaces on the socket into firm engagement with load bearing surfaces on the base. The pins themselves bear a portion of the cutting forces, the pins being selected to fail in shear when extraordinary forces are encountered in order to prevent damage to the bases and the welds securing the bases to the rotor.

Abstract: A road working machine for cutting into a road surface includes a power driven, cutting tooth carrying rotor comprising a plurality of rotor segments removably attached to a shaft to vary rotor width. Each of the segments includes a plurality of subsegments attached to one another and to the rotor by threaded fasteners. Rings supporting a higher concentration of cutting teeth angled toward the ends of the rotor can be secured to the endmost rotor segments for edge cutting. A cover for the rotor includes an adjustable baffle which may be secured at any of a plurality of positions in the cover to lie adjacent an end segment of the rotor in use regardless of the rotor width.

Abstract: A fork extension attachment for a boom-type forklift for use in loading and unloading a fragile cargo from commercial containers includes an extension portion pivotally connected to the outer end of the boom to allow pivotal movement of the extension in a vertical plane and a fork assembly having its inner end pivotally connected to the outer end of the extension portion to allow pivotal movement of the fork assembly in a vertical plane. The fork assembly includes at least two tines that are mounted for powered horizontal lateral movement relative to each other and relative to the longitudinal axis of the assembly. An electrical pendulum switch is provided for maintaining the fork assembly in a substantially horizontal position when desired.

Abstract: A mounting for quickly removing and replacing cutter teeth on a rotary drum includes a cutter tooth socket mating with a socket housing defining a tapered channel having a base surface and a lateral surfaces inclined with respect to the longitudinal axis of the tapered channel and oriented at an acute angle with respect to the base surface to retain the cutter tooth socket by a wedging action. The cutter tooth socket is also retained on the socket housing by a spring retainer seated in a recess in the base surface and engaging a protrusion depending in a groove defined by the cutter tooth socket. A leading side of the cutter tooth socket with respect to the direction of cutter movement contains oblique surfaces to cam to the side the material of the surface being cut. A dummy cap is inserted in socket housings from which the cutter teeth sockets have been removed and extends beyond the socket housings toward the surface being cut to protect the socket housings from wear by the work surface.

Abstract: A hoist 10 with redundant safety features comprising: a hoist support frame; a lifting drum 14 mounted on the hoist support frame; a load block assembly 28; an equalizer assembly 24 mounted on the hoist support frame; the load block assembly 28 being suspended by a first set of ropefalls 30 and 36 and a second set of ropefalls 32 and 34, each of the ropefalls having one end secured to lifting drum 14 and the other end secured to equalizer assembly 24, each of the sets of ropefalls having sufficient load bearing capacity to carry the load carried by the other set of ropefalls in addition to its own load; each of the ropefalls having first sections extending from lifting drum 14 to load block assembly 28 and second sections extending from load block assembly 28 to equalizer assembly 24, each of the first sections being positioned in a substantially common plane with each other and each of the second sections being positioned in another substantially common plane with each other; equalizer assembly 24 including

Abstract: A hydraulic sectional control valve includes separate pump pressure and function control spools. The spools may be actuated independently and sequentially to provide raising, holding and power down functions for earthmoving and construction vehicles. Additional function control spools may be added in the valve structure to provide multiple function control.

Abstract: A sectional valve having dual pressure relief provide high pressure relief for the hoist or lift function while auxiliary functions such as tilt, not requiring high pressure, are monitored by a low pressure relief valve. Spool position in one of the valve sections determined which functions become operative and which relief valve monitors the system.

Abstract: A method and apparatus for guiding a body into the ground by means of a single hammer acted on by a reaction mass which is driven by a double-acting piston-cylinder unit via a controlled, periodically changing stream of pressure medium and which generates forces which act on the body in its longitudinal direction, the body being driven by first causing the pressure stream to have an approximately sinusoidally pulsating form for imparting a vibratory movement to the hammer, and then, when the speed with which the body is being driven into the ground decreases below a given minimum value, causing the pressure medium to drive the reaction mass according to a periodic, approximately unsteady displacement-time function for imparting a hammering movement to the hammer, while, during such hammering movement, simultaneously monitoring the hammering energy being generated.

Abstract: A portable LP gas heater includes a combustion chamber the discharge end of which is open and unobstructed and the inlet end of which is defined by a rear head plate having a central primary air inlet into which projects, to a limited degree, a cylindrical fuel nozzle. The projected extremity of the nozzle which positions within the combustion chamber mounts a transversely disposed baffle which is parallel to and spaced preferably about one inch from the rear head plate. Fuel exits from and about the nozzle immediately adjacent and upstream of the baffle. The baffle has a size which permits it to be introduced to and removed from the combustion chamber by way of the primary air inlet. The rear head is further distinguished by a single group of apertures located adjacent its outer periphery in a substantially ring-like pattern.

Abstract: There is provided a felling head for attachment to a boom. The felling head includes an upper part and a lower part. The upper part has at least one brace portion and a grapple adapted to clasp a tree trunk against the brace portion. The lower part includes a circular saw blade mounted in a plane perpendicular to the longitudinal axis of a tree clasped between the brace portion and the grapple. The leading edge of the circular saw blade projects beyond the location of the brace portion by a distance at least as great as the diameter of a tree being felled so that such tree can be cut through by the saw blade before the tree comes into contact with any other part of the felling head, including the brace portion.

Abstract: A submerging ramming arrangement has a housing, an impacting body axially displaceable in the housing for delivering ramming impacts against a ramming pile, a hydraulic drive for displacing the impacting body in the housing, a hydraulic cylinder-and-piston unit arranged in an upper portion of the housing and having a cylinder, a piston sealingly displaceable in the cylinder and subdividing the same into first and second chambers, a piston rod connected with the piston and having a portion extending from the first chamber coaxially outwardly beyond the cylinder, a holding element for mounting the arrangement on a supporting element and provided on the outwardly extending portion of the piston, a hydraulic accumulator communicating with the first chamber of the cylinder-and-piston unit and arranged for receiving excess hydraulic medium under pressure, and an indicating element actuated by the piston of the cylinder-and-piston unit within a predetermined distance from a respective end of the cylinder-and-piston

Abstract: There is provided a centrifugal grinder which utilizes an internal grinding surface in the shape of a surface of revolution. A rotor is mounted coaxially within the grinding surface and has a central cavity defining at least one pocket through which material in the central cavity can contact the grinding surface. Material for grinding is delivered to the central cavity, and means are provided for rotating the rotor. Further means are incorporated in the rotor for applying water to the grinding surface.

Abstract: A wick heater comprises a housing the top and front panel of which are so constructed and interrelated with each other and the remainder of the housing to provide for their relative expansion and contraction in a manner to avoid warping, buckling or distortion or any undue stress on the housing or its component parts during operation of the heater. The top of the housing comprises a frame and inserts, a principal insert being interconnected with and for expansion and contraction relative to the frame and to position directly above the chimney of the heater and the area encompassed by its backing heat reflecting surface. This principal insert has a unique pattern of slots the bounding edges of which are flanged and a portion of which are oriented in directions at right angles to other of said slots to lend both strength and stress accommodation to the top of the housing.

Abstract: A force-transmitting a drive caps is interposable between a pile driver hammer and a pile to be driven. This cap is formed with an upwardly open cylinder which is of smaller area than the striking face of the hammer. A piston is vertically reciprocal in this cylinder and has an upper surface which is engageable with the striking face of the hammer. The chamber below the piston in the drive cap contains a body of liquid and a body of gas. The gas is pressurized so as to urge the piston into a raised position extending upwardly from the upper face of the drive cap. The piston and hammer are dimensioned so that the hammer first strikes the piston, driving it downwardly in the cylinder, and thereafter strikes the upper surface of the drive cap. The gas body may be held in a separate container within the chamber in te drive cap and the pressure of the gas body is established by the amount of liquid in this chamber.

Abstract: The present invention relates to a soil stabilizer machine with a recycler screen. The soil stabilizer machine includes a horizontal rotor having a plurality of teeth along a periphery thereof. In operation, the machine moves along the ground and the rotor rotates to dig soil material. The soil dug by the rotor is comminuted by the rotor within a housing surrounding the rotor. Inside the housing and behind the rotor a screen is positioned to selectively permit particles of soil of less than a predetermined size to be dispensed on the ground behind the rotor and to selectively return particles of soil or rock greater than the predetermined size to the rotor to be further comminuted by the rotor. In a preferred embodiment, the screen is pivotably mounted within the housing between first and second positions.

Abstract: There is provided a grapple for lifting and maneuvring elongated items, which includes a main frame and a sub-frame, the two frames being pivotally mounted with respect to each other about a substantially vertical axis. The sub frame includes grappling jaws and heel elements which are capable of receiving elongated items. Mechanisms are provided for rotating the sub-frame with respect to the main frame. The heel is fixed with respect to the sub-frame and is spaced from the grappling jaws.

Abstract: There is provided a method and apparatus for felling a tree. A tree is cut through with a circular saw, and then substantially immediately after the cutting, the tree is clasped by a grapple means. The apparatus for cutting the tree may include an offset exposed arc of the circular saw, and by mounting the apparatus on a swingable boom, it is possible to cut the tree in a scything or scythe-swinging action.