Abstract: A procedure for dispensing and exhausting the contents of a squeeze tube, wherein the exhausted extent of the tube is rolled or folded along one side of the tube and the resulting convolutions are retained against one side of the tube by rolling a resilient loop along the opposite side of the tube. A squeeze tube is provided with a resilient loop embracing one side of the tube at the end thereof remote from the dispensing opening enabling execution of the above procedure.

Abstract: A motion transducer wherein a variable volume chamber of a trochoidal rotary mechanism is operatively connected by a liquid working fluid to a variable volume chamber of a reciprocating piston mechanism, whereby a rotary motion can be converted to a reciprocating motion and vice versa. An internal combustion engine directly productive of aone of such kinds of motions is drivingly connected to the transducer to obtain the other kind of motion as output. The piston of a reciprocating internal engine can be movable in unison with the piston of the reciprocating system, or alternatively, the rotary shaft of a Wankel-type internal combustion engine can be directly coupled to the rotary shaft of the trochoidal rotary mechanism.

Abstract: An improved "Wankel-type" rotary engine wherein the same trochoidal cavity employed for effecting a four-phase internal combustion engine operation is also employed to perform a supercharging function in that air is compressed in one chamber (chambers being defined between seals of the rotor with the wall bounding the trochoidal cavity) and transferred to another chamber in synchronization with the latter making its transition from its intake to its compression phase, with such transference being carried out in a manner causing substantial turbulence. The engine can optionally be operated in a diesel mode with diesel fuel injection being made at the conventional phase condition, or as a spark ignition engine with gasoline carburetion of air fed to the supercharging compression chamber being effected. Engine exhaust heat is optionally applied to compressed air or air-fuel mixture as the latter is being transferred respectively in the diesel or spark mode of engine operation.

Abstract: Chain saw sharpening apparatus that incorporates a rotary file replaceably journaled in a guide structure, with the file coupled to or adapted to be coupled to an electric driving motor. The guide structure has finger or handgrip at one end remote from the motor, and the latter is provided with a handgrip or can be hand-gripped directly. The rotary file is provided adjacent its end remote from the motor with a radial enlargement that is at least in part defined by a surface of revolution enabling its function as a stop or as a thrust bearing. A guide bracket is provided that can be mounted on the chain saw bar; such bracket being provided with adjustable upstanding guide pins for coacting with guide slots in the guide structure.

Abstract: An apparatus for use in combination with a specialized rotary steel file for enabling the sharpening of saw chains that includes an inverted channel-shaped body for accommodating a chain saw bar and saw chain therein. Adjustable chain centering elements serve to limit and predetermine the desired spatial relationship of the body and the bar which can be secured by clamping screws engageable with the bar. A recess in the body constitutes a window giving access to the saw chain, with guide grooves in the body at the bottom of the recess serving to position the rotary file during the sharpening procedure. A chain advancing unit is provided for properly advancing one tooth at a time to register properly a tooth to be filed with the grooves. A gauge is positionable in the recess to enable dressing gauge teeth of the saw chain to proper height is also provided.

Abstract: A rotary internal combustion engine with four vanes carried by a rotor engaging an internal oval housing surface to define four chambers that orbit the rotor axis. Two of the chambers, diametrically opposed, are operated as working chambers on a four-phase internal combustion engine basis in phase with each other. Supercharging is continued through an early part of the volume expansion and firing phase, whereby the rate of expansion per degree of rotation is substantial at the time firing is initiated. The other two chambers are operated as air pumping chambers to supercharge the working chambers via an air pressure accumulator. A lubricating liquid within the chamber is introduced into the pumping chambers for engine lubrication with excess being returned to the accumulator. The pressure of the liquid is applied hydraulically against the vanes to urge each radially outward with equal force.

Abstract: A four-chamber rotary internal combustion engine wherein each chamber is operated on a four-stroke cycle with adjacent chambers being operated 90.degree. out of phase with each other so that combustion or power strokes are effected adjacent diametrically opposed parts of the housing. Intake and exhaust valving functions are effected by rotary valves constituted of passageways in the housing and rotor, and with adjacent chambers having intake and exhaust connection to separate sets of passageways in the housing.

Abstract: A rotary positive fluid displacement machine wherein the radially reciprocable sealing vanes are hydraulically coupled to each other at their innermost ends for preventing the occurrence of compression opposition to radial retraction of the vanes and for urging radial outward movement of the vanes.