Abstract: A sealed track joint having a pin and a bushing and links assembled therewith. The links and bushing present a cavity in which an elastomeric seal is disposed and is shown to be of an S-shape in cross section and is compressed into the cavity.

Abstract: A roller frame for a crawler tractor for supporting the body portion of the tractor and including a pair of laterally spaced and parallel side rail members rigidly interconnected to form an elongated unitary member. Each of the side rail members have an upper edge and a lower edge with the latter having at least two generally U-shaped cut-out portions formed therein so as to provide a front support surface, an intermediate support surface, and a rear support surface. A plurality of rollers are adapted to be supported in each of the cut-out portions and a shield extends between each adjacent pair of support surfaces and is fastened thereto so as to enclose the lower portions of the rollers and prevent rocks and the like from gaining access into the roller frame.

Abstract: A track-type vehicle comprises a plurality of articulated track shoes each comprising a pair of downwardly converging sidewalls terminating at a grouser extending the full width thereof. The sidewalls define a V-shaped trough-like configuration and a track link is releasably attached thereto. A pair of parallel lugs are formed on the upper ends of the sidewalls.

Abstract: Transportation apparatus, including an endless handrail and drive therefor. The handrail drive includes traction and pressure rollers disposed in driving engagement with the handrail. At least certain of the traction rollers each includes tire and hub portions formed of first and second integrally bonded elastomeric materials, respectively, with the first elastomeric material being selected to provide a predetermined dynamic coefficient of friction with the handrail, and the second elastomeric material being a relatively harder material selected to provide a supporting structure for the first elastomeric material.

Abstract: The beads of a pneumatic tire having sidewalls of a cross-sectional shape, wherein upon inflation the midline thereof between the tread reinforcement and bead is convex with respect to the interior of the tire, are gripped by a rim having an annular channel generally elliptically shaped in cross-section and having its open side directed radially outwardly with respect to the axis of the wheel and inwardly directed annular flanges only partially closing the open side of the channel.

Abstract: An impact shock absorber is mounted between the bumper and body of a motor car and permits the bumper to move relative to the car body when the bumper hits an obstacle. The shock absorber damps the impact energy during this relative movement. It consists essentially of a cylinder wherein a piston is glidingly mounted and held under a yielding force in a rest position. The piston is weakened at its connection to the inner end of the piston rod that the piston will break off the rod under a selected maximum impact force.

Abstract: A crawler drive system having an endless track is disclosed in which each track sprocket has a double row of teeth and each track shoe has a double row of lugs. The two lugs on each shoe, which lie in different rows, are spaced in the longitudinal direction a greater distance than adjacent teeth of the sprocket so that only one lug of a shoe is engaged by a sprocket tooth at any instant. The two lugs of successive shoes are spaced longitudinally a lesser distance than the pairs of teeth of the sprocket so that only a single lug of a single shoe is engaged by a sprocket tooth at any time.

Abstract: A bottom unloader for a storage silo and of the kind having a sweep arm conveyor carrying an endless cutting and conveying chain, the sweep arm being pivoted at or near the silo wall so that it can be swung across the base of the silo and can cut and remove material therefrom, wherein the unloader comprises a pivotal mounting for the sweep arm, a drive assembly for the sweep arm conveyor chain and which is co-axial with the pivotal mounting, and a reciprocating drive assembly for swinging the sweep arm, the reciprocating drive assembly being arranged below the sweep arm and for reception in a radial trough in the base of the silo.

Abstract: A buffer, particularly suitable for use in railway vehicles, comprising a cylinder including a movable piston and a buffer fluid contained therein, the buffer fluid formed of a very high-viscosity fluid such as silicone oil, and at the same time the cylinder includes a gaseous medium having a volume at least corresponding to the displacement of the piston rod of the piston when it moves in the cylinder to the end of its stroke.

Abstract: A conveyor having a tubular endless belt with lateral beads to be engaged by drive and idler pulleys and with clip springs to load the longitudinal edges of the belt into abutting relationship. In order to supply and discharge material respectively to and from the hollow space of the conveyor at desired locations along the conveyor path stationary pressure rollers separate the longitudinal edges of the belt against the bias of the clip springs. Alternatively, power can be used to separate the longitudinal edges of the belt, the power having pulleys engageable with the beads of the belt. To facilitate the discharge of material from the conveyor guide rollers provide a convex bight in the belt along the inner run thereof immediately ahead of the discharge location.

Abstract: A hopper for mortar is provided with a gate slidable between one position wherein mortar is free to flow downwardly and out of the device and another position wherein the gate blocks the hopper outlet. The flanking walls of the hopper are provided with adjustable supports for striker posts. In use to fill a vertical joint between ends of two adjacent masonry blocks, the supports are adjusted to slightly enter and fully cover the opposite sides of the joint. With the hopper in place over the joint, the gate is slid open and mortar is permitted to flow, until the space between the ends of the two blocks, and between the two striker posts is filled. Then the gate is slid closed. As the device is lifted straight upwards, the striker posts which preferably present convex surfaces toward the mortar, automatically tool the opposite sides of the joint.

Abstract: A closure for a container is formed by a plastic body part and a plastic closure part connected by a thin, integral section which forms a "score" line of easy tearability. The closure part has an annular wall slightly smaller than an annular wall of the body part. The score line is adjacent the bottom of the annular wall of the closure part and the top of the annular wall of the body part. Thus after the plastic has been torn along the score line, the annular wall of the closure part slips within the annular wall of the body part to form a reusable closure. The annular wall of the closure part and the annular wall of the body part have conformations that interlock when the two parts are so slipped together to releasably hold the closure part in place.

Abstract: A closing mechanism for the outlet of a concrete container and comprising a vertical shaft carrying a feed worm having at least three grooves defined by threads. Each thread extending at the outside as well as at the inside over an angle not below 360/n.degree. and not exceeding 720/n.degree., where n is the number of threads, and having over its whole width angles of inclination not below 8.degree. and not exceeding 15.degree.. Preferably the upper edge of each thread forms an upwards open angle of between 65.degree. and 90.degree. with the shaft, and the transition between said upper edge and the peripheral edge of the thread is rounded off with a radius of curvature of between 35 % and 55 % of the width of the thread.

Abstract: A rotatable track supporting member for a track-type vehicle has a hub rotatably carried upon a track frame of such vehicle and a rim which is constructed from segmented resilient material so as to reduce the amount of noise generated by the running engagement between the rim and an endless track chain mounted for movement about the track frame.

Abstract: This disclosure relates to a method and apparatus for feeding material to a gas generator. A cell feeder is provided for preventing backflow of gases through the feeding apparatus from the gas generator. The cell feeder includes a housing having an axial passage extending therethrough defining a path of travel for material from an inlet opening to an outlet opening, first and second pistons mounted in the housing for compressing and transferring material received in the housing along the path from the inlet to the outlet, each of the pistons also alternately blocking and unblocking the path whereby material received within the housing will be compressed prior to the opening of the outlets, thereby preventing the backflow of gases.

Abstract: A resilient contacting assembly attachable to track shoes of a crawler type vehicle. The contacting element is formed of a plurality of discs for improving the wear life of the contacting element.

Abstract: An "E" type coupler for a railway car has a key connecting the coupler shank to an end-of-car cushioning unit. The cushioning unit has a slidable end cap housing assembly receiving the coupler shank and a slot extending through the shank and one side of that housing assembly to receive and mount the coupler key. An inner recess in the other opposed side of the housing assembly recess receives the key in abutting relation to such other side and a retainer on the other side contacts and retains the key in the housing assembly.

Abstract: A wheel for carrying continuous track of crawler type vehicles has a set of spaced pairs of inner and outer panel members that are connected together through vibration barriers. One of the inner or outer panels is formed of a laminate.

Abstract: An endless track for a tracked vehicle is described. The track includes guiding elements pivotally coupled with other track elements. Each guiding element defines lateral guiding surfaces, a lower ground-engaging surface and lateral track driving projections.

Abstract: An endless track for a tracked vehicle is described. The track is of modular form and includes traction elements and track guiding elements. The elements are arranged in rows and are positioned symmetrically with respect to the longitudinal median line of the track, whereby the track is loaded symmetrically in use.