Abstract: A circular notch in a rigid annular case element of a shaft seal for preventing distortion of the case during a molding and bending process. The notch is about one-fifth to one-half as deep as the surrounding thickness of the case element and has sloping walls leading to a central flat portion.

Abstract: A hydraulic system for a pavement cutting machine controls the engagement and disengagement of a rotating blade with a pavement surface. A proportional-flow manual-release valve is arranged in series with a pressure-compensated maximum-flow control valve to allow a rapid raising of the blade and an initial relatively rapid lowering of the blade followed by a controllable slower blade descent.

Abstract: A vibration damper for a road planer and the like with a main frame and a sub-frame movably connected thereto. A prime mover and a tool are mounted on the sub-frame, which includes frame members forming compartments adapted to receive lead shot particles therein. The particles absorb vibrational energy from the prime mover and the tool. A method of damping vibration is disclosed wherein vibrational energy is transmitted to the lead shot particles which vibrate and generate heat. The heat is dissipated through the frame members to the atmosphere.

Abstract: The present invention relates to a method of impregnating into a porous metal matrix mounted on a backing a PTFE based composition wherein the PTFE based composition is mounted on a layer of supporting material so as to form a tape to assist in carrying it to and forcing it into the porous metal matrix, whereupon the layer of supporting material is removed. In one embodiment, the present invention may be in the form of a composite bearing material having a metal backing supporting a PTFE filled porous metal matrix of bronze or other copper alloys and a surface layer above the porous metal matrix of just the PTFE based composition.

Abstract: A bidirectional shaft seal includes a plurality of concentric, radially-staggered contact surfaces arranged so as to engage a shaft along elliptical contact bands. Each contact band forms a static and dynamic barrier to prevent leakage under clockwise and couterclockwise shaft rotation. The elliptical contact may be achieved by offsetting the center of the seal lip from the axis of the shaft or by eccentrically clamping or bonding the seal lip within a seal case and mounting the seal lip concentrically with the shaft.

Abstract: A low-drag bicycle comprising an elongated, two piece, generally tubular frame of elliptical cross-section extending between the front and rear wheels wherein the cyclist assumes a recumbent position over the frame facing down and powers the cycle by means of a pedal arrangement directly connected to and concentrically arranged with the rear wheel axle, which axle constitutes the input shaft of a continuously variable compound traction drive transmission for driving the rear wheel hub.

Abstract: The present invention relates to a composite bearing material comprising three layers: (1) a metal backing, (2) a porous metal interlayer bonded to the metal backing which includes bronze or other copper alloy particles from two distinct particle size ranges and (3) a PTFE based composition intermixed with and overlying the porous metal interlayer. In accordance with the method of the present invention, the porous metal interlayer substantially comprises a relatively non-homogeneous mixture of particles from the two distinct particle size ranges, wherein a substantial portion of the relatively fine powder is segregated adjacent the metal backing. The present invention includes a significant thickness of the PTFE based composition applied to and remaining above the surface of the porous metal backing.

Abstract: A composite thrust collar for a rotary shaft formed from a radial bearing in which the rotating shaft may rotate and at least one axial thrust collar preventing axial movement of the shaft, characterized in that the radial bearing or the axial thrust collar or collars has at least one boss and in that the radial bearing is fixed to the axial thrust collar or collars by welding along said at least one boss and in that said at least one boss interconnects with the radial bearing or axial thrust collar in such a manner that should the weld break the bearing and collar can not rotate nor be radially disposed relative to one another.

Abstract: A tumbling media element for use in tumbling non-magnetic workpieces includes a body portion formed of a non-magnetic material and a magnetic insert disposed within the body portion. The insert renders the body portion suitable for magnetic sorting techniques and may increase the total mass of the media element thereby generating greater kinetic energy during tumbling operations.

Abstract: The invention is a weld metal for welding of a titanium alloy member to a ferrous based alloy member as an intermediate transition zone between such members so as to overcome the metallurgical imcompatability of each such member, and which consists of a vanadium metal, titanium and iron and inconsequential amounts of brittle intermetallic compounds. The preferred weld metal is vanadium rich and contains no more than 50% combined weight of titanium and such a weld metal is produced in accordance with our invention by fusion welding, particularly capacitor discharge welding, which because of its inherent but heretofore unrecognized extremely fast quench or freeze rates will produce a fusion weld between these two metallurgically incompatible alloys which is free of brittle intermetallic compounds. It is also part of our invention that such a weld metal of the aforesaid composition will have independent use as a welding alloy, particularly when fabricated in sheet form.

Abstract: A flanged half bearing includes a plain half bearing rigidly connected to a pair of flanges by projection welds. All finishing operations are carried out on the separate bearing parts prior to assembly so that a finished part results after welding. Each flange is provided with a protrusion which collapses during the projection welding process. Projection welding prevents damage to the bearing antifriction material and also prevents deformation of the bearing parts during welding.

Abstract: A unitized grease seal. The seal member has a one-piece metal case having a cylindrical bore-sealing portion and a radial flange, and a molded elastomeric member bonded to the metal case to provide a portion bonded to the radial flange and an outer generally cylindrical portion bonded to the surface of the bore-sealing portion and providing a series of spaced apart inwardly extending retaining portions. The elastomeric member also has two diverging lip portions with a cavity between them, one providing a grease retention lip having small spaced-apart shallow indentations enabling passage of small amounts of grease into the cavity, the other lip portion having a polytetrafluoroethylene insert bonded thereto.

Abstract: An apparatus and method of hot-forging in a forging press a cylindrical powdered metal preform to substantially full theoretical density to thereby produce a powdered metal part having a small inner bore wherein the core rod defining such bore is constructed so as to allow a continuous flow of a highly vaporizable liquid coolant such as nitrogen to the metal forming portion of the core rod and to thermally insulate the incoming coolant to assure its being maintained substantially unvaporized until being expelled to the core rod cooling chamber.

Abstract: A pavement cutting saw is provided with a power train for accommodating high horsepower engines. A combination of pulleys, gears and coacting drive belts allows high horsepower to be delivered to a cutting tool while enabling the cutting tool to effect a deep cut and while avoiding interference between the pavement surface and any power train components. The power train may be arranged as a two-step speed reduction system to enable the engine to run at relatively high operating speeds and to allow the blade to rotate within a preferred speed range.

Abstract: The invention involves a method for making powder metal forging preforms of high strength ferrous-base alloys in which the times and temperatures for reducing oxides, sintering, and carburizing are substantially reduced as compared to conventional techniques. The method includes simultaneously sintering and carburizing the preforms in the hot zone of a sintering furnace at temperatures below 2000.degree. F. and for a period of time above austenitic temperature not exceeding about 35 minutes. After carburizing the preforms are rapidly cooled to freeze the case carbon gradient obtained in the hot zone.

Abstract: A low-drag bicycle comprising an elongated, two piece, generally tubular frame of elliptical cross-section extending between the front and rear wheels wherein the cyclist assumes a recumbent position over the frame facing down and powers the cycle by means of a pedal arrangement and transmission directly connected to and concentrically arranged with the rear wheel axle.

Abstract: A process for the manufacture of half bearings with flanges rigidly connected thereto, made of a steel plate with an antifriction layer, in which the plain (i.e. not yet flanged) half bearing and a pair of flanges are produced and worked separately, and subsequently the two flanges are fixed, in the correct position, onto the half bearing by a welding operation carried out by projection or by condenser discharge. The preparation and working of the thus separate components results in being very economical owing both to the reduction of the operational costs and to a considerable reduction of the cost of the necessary equipment, and the production times are remarkably reduced. The welding step requires very short times and, by the suitable choice of the process used for the welding operation, no deterioration of the antifriction layer applied to the support steel plate occurs, nor any deformation of the plate itself, so that no further working on the finished piece is required.

Abstract: A compact belt tensioning device includes a double acting pawl which selectively engages opposed sets of ratchet teeth formed on a stationary mounting. The tensioning device is adapted to be preset in a tensioned state to facilitate installation and repair procedures and may be easily activated by manually releasing the pawl.

Abstract: A test bearing is adapted from a standard production bearing for recording the location and magnitude of load applied to the bearing when installed and operated in its intended environment. A groove is typically formed in the stationary raceway of a cylindrical or tapered roller bearing and a relatively soft ductile wire is inserted into the groove. A plurality of axially spaced circumferential grooves may be fitted with wires for the determination of any potentional misalignment of the bearing. The bearing is then operated under normal conditions such that the inserted wires are plastically deformed. The extent of plastic deformation of the wire provides an accurate indication of the loading of the bearing.

Abstract: A split multipiece flanged journal bearing for use as an engine crankshaft thrust-journal bearing or the like wherein the thrust flanges and journal bearing shells are semi-cylindrical and have interlocking means to prevent rotational motion of the thrust flange relative to the respective bearing shell and with potential replacement interchangeability so that any worn or damaged parts may be replaced without changing the whole bearing and so that any one or all thrust flanges may be replaced without removing the crankshaft from the engine and wherein the notch and interlocking lug at one end of a particular combination of thrust flange and bearing shell is of greater arc length than those at the other end to provide a fail-safe feature to assure correct assembly.