Abstract: A friction material is provided for a friction member of a torque-transmitting mechanism. The friction member has a woven carbon fiber fabric base. A coating is applied to the base to form a portion of a contact surface positioned to contact a reaction member during engagement of the torque-transmitting mechanism. The coating is a mixture of a resin binder and a friction modifier. A method of forming a friction material is also provided.

Abstract: A friction material is provided for a friction member of a torque-transmitting mechanism. The friction member has a woven carbon fiber fabric base. A coating is applied to the base to form a portion of a contact surface positioned to contact a reaction member during engagement of the torque-transmitting mechanism. The coating is a mixture of a resin binder and a friction modifier. A method of forming a friction material is also provided.

Abstract: Carbon-composite materials can be useful for a wide range of applications such as in friction applications as found in automotive continuous slip service in torque converter clutches. Carbon-composites may also be used as fluid diffusion layers in electrochemical fuel cells. Continuous processing of such carbon composites, though long found to be difficult due to unacceptably long dwell times can be done with the use of propane as the hydrocarbon gas, particularly when done at temperatures between 1200 and 2000° C. and 0.1 and 1 mm Hg. In particular, such methods lead to carbon composites with suitable frictional properties.

Abstract: A short tapered fin, that when worn on the forward portion of the foot, acts as a lever to the foot with the fulcrum of that lever being on the underside of the foot. The effect of this lever action stretches the arch of the foot on every downward kick. The rigidity of the fin is also adjustable to the particular swimmer by varying the taper of the fin. The short tapered swim fin functions as a stretching device to stretch and increase the arch of the foot, and as a training device to strengthen the leg muscles that are used with the motions of flutter kick. This invention is a training swim fin that when used over time will improve a swimmer's performance for competitive swimming without fins.

Abstract: A short motion swim fin used as training device for the improvement of the fast flutter kick motions of speed swimming and as such uses a flat flexible plate which is rigid across its base, and inner rubber sheath surrounding the plate and an outer sheath which varies in length depending upon the rigidity desired by thereby varying a projecting portion of the plate which contact the water. The plate functions as a lever on the underside of the foot to stretch the arch of the foot on every downward kick, as well as to strengthen the fast twitch leg muscles associated with a strong flutter kick.

Abstract: A short motion swim fin used as a training device for the improvement of the fast flutter kick motions of speed swimming, and as such uses a short, rigid frame, that is worn on the underside of the forward portion of the foot where it functions as a lever to stretch the arch of the entire foot on every downward kick, as well as to strengthen the fast twitch leg muscles associated with a strong flutter kick.

Abstract: An impact hammer assembly for use on a drill head intended for drilling hard material, such as rock. The hammer comprises an elongated hollow case opened at one end and a drill bit provided with a rear stem that is mounted in the hollow case, through its open end, for free rotation and limited slidable displacement. A pair of pins extends transversally through the case on either side of the stem of the drill bit to retain the same in the case.

Abstract: A drill bit for use with a reciprocating device, wherein the bit is in the form of a rotatable corrugated frusto-conical roller, supported by a U-shaped member, attached to a mounting post. The corrugations are the cutting edges of the bit.

Abstract: A method for drilling a hole in a hard material such as rock. According to this method, the rock is fragmented by impact along spaced-apart, parallel paths while it is simultaneous fragmented by shear between these paths. An apparatus for carrying out this method is also disclosed.

Abstract: A machine with a central strut, which strut has a center portion first and second end portion, two pairs of flexible bows, each pair comprised of two bows under flexed stress and having first and second ends. The bows are flexed in an arc such that said first and second ends of the bows extend at 90.degree. angles to each other. The first end of each the bows in a pair are fastened to each other in overlapping longitudinal relationship to form a handle for said machine, and the second end of each of said bows are rotatably secured to an end portion of the strut in a manner to prevent lateral or longitudinal movement.The machine converts forces applied in a direction perpendicularly to a plane to a force acting perpendicularly to the same plane but in a direction opposite that of the first force applied. The first force may be applied in the first direction of a single point, or a pair of points, in equal or differing magnitudes.