Abstract: A mixture comprising a cross-linkable thermosetting resin and a fluorocarbon additive which is curable to form a thermoset resin composition having a gradient concentration of the fluorocarbon additive through a cross-section thereof.

Abstract: A linkage assembly including a crank arm, first and second elongated links, and first and second springs. Ends of the links are adjacent one another and overlap. The first spring is held within this overlapping portion. The second spring is held about an unoverlapped portion of the second link. In a neutral position, the first and second links are balanced in force. In an open position, the first and second links are moved away from one another, causing the second link to be less compressed than the first link. In a back pressure position, the first and second links are moved toward one another, causing the first link to be less compressed than the second link. The first and second springs are held such that they are balanced in the neutral position and provide a restorative force in the open and back pressure positions.

Abstract: A muffler is provided for use in a pneumatic hand tool having a handle with an exhaust passage. The muffler includes an inner tube, an outer tube, an upper plate, and an end cap. The inner tube is located within the outer tube, with one or more openings being provided in each. The upper plate is located near the inner tube and is provided to close off the exhaust passage so that a majority of the exhaust air is directed into the inner tube during use. The end cap attaches to the handle for closing off the exhaust passage, but for one or more exit openings. During use, exhaust air enters the inner tube, flows out its penguins, flows out the outer tube openings, and flows out the exit opening in the end cap. The tortuous path slows the exhaust air and assists in dampening exhaust noise.

Abstract: A muffler for quieting exhaust expelled from a pneumatic hand tool having a handle and an exhaust passage. The muffler includes an inner tube having a plurality of holes, a number of dividers fixedly and spacedly positioned about the inner tube, and an end cap attachable to the handle for closing off the exhaust passage. At least one of the end cap and the handle including an exit opening. The inner tube has distal and proximal ends and an exterior surface. A cutoff wall is located below at least one airflow opening. The cutoff wall forces exhaust air to exit the inner tube via the at least one airflow opening thereabove. Each divider extends outward from the inner tube exterior surface a distance less than the width of the main section. The combination of the inner tube and dividers are located within the main section.

Abstract: A composition of matter formed by melt-blending certain thermoplastic polymers and from about 1.0 to about 7.5 wt. % of a fluorocarbon additive, the additive having a lower surface energy than that of the polymer; the blending resulting in a cooled admixture having a concentration of fluorocarbon additive through a cross-section of the solid composition lower in the interior thereof and higher at the surfaces thereof.

Abstract: A muffler (30) for quieting exhaust expelled from a pneumatic hand tool (10) having a handle (12), an air intake port, and an exhaust port. The muffler (30) includes an inner tube with a plurality of holes, a number of washers (36) positioned longitudinally about the inner tube (32) at the location of the plurality of holes, and a flexible outer sleeve (34) positioned about the combination of washers (36) and inner tube (32). The inner tube includes a proximal end adapted to connect to the pneumatic hand tool exhaust port. During use, exhaust air pass from the hand tool (10) out the exhaust port, into the inner tube, out the inner tube holes, into the washers, through the washers, and out the flexible outer sleeve.

Abstract: A composition of matter formed by melt-blending a thermoplastic polymer and from about 0.01% to less than about 1.0%, by weight, of an additive comprising a polyfluoroalkylsiloxane, the additive having a lower surface energy than that of the polymer, and the blending resulting in a substantially homogenous admixture of the polymer and the additive. The admixture, upon cooling, results in a solid composition wherein a concentration of the additive through a cross-section of the solid composition is lower in the interior thereof and higher at the surfaces thereof.

Abstract: A muffler (30) for quieting exhaust expelled from a pneumatic hand tool (10) having a handle (12), an air intake port, and an exhaust port. The muffler (30) includes an inner tube with a plurality of holes, a number of washers (36) positioned longitudinally about the inner tube (32) at the location of the plurality of holes, and an end cap for sealing off the inner tube. The inner tube is preferably formed as a spring. During use, exhaust air pass from the hand tool (10) into the inner tube, into the washers, through the washers, and out the muffler end cap. Alternative embodiments includes an outer tube.

Abstract: An exhaust tube having an internal butterfly valve is coupled to the exhaust end of a conventional exhaust pipe extending from an internal combustion engine. The valve plate is mounted for swinging about an axis offset from the axis of the exhaust tube. The valve plate is spring-biased to a normal position substantially obstructing the exhaust tube. At high exhaust flow conditions, the valve plate is automatically swung to an open position in which flow through the exhaust tube is essentially unrestricted. Under back pressure conditions, the valve plate swings oppositely but still constitutes a substantial obstruction to exhaust flow. Consequently, the valve automatically opens at high flow conditions and automatically closes at low flow and back pressure conditions for more efficient operation of the internal combustion engine.

Abstract: A composition of matter formed by melt-blending a thermoplastic polymer and from 0.01% to <1% of a fluorocarbon additive, the additive having a lower surface energy than that of the polymer; the blending resulting in a cooled admixture having a concentration of fluorocarbon additive through a cross-section of the solid composition lower in the interior thereof and higher at the surfaces thereof.

Abstract: A composition of matter formed by melt-blending a thermoplastic polymer and from 0.01% to <1% of a fluorocarbon additive, the additive having a lower surface energy than that of the polymer; the blending resulting in a cooled admixture having a concentration of fluorocarbon additive through a cross-section of the solid composition lower in the interior thereof and higher at the surfaces thereof.

Abstract: This invention provides tubings formed of a polymeric composition comprising a thermoplastic elastomeric hydrocarbon black copolymer and a polysiloxane having a kinematic viscosity of 20 to 10.sup.6 centistokes at room temperature, the polysiloxane constituting from about 0.1 to 12 percent by weight of the composition. The tubings can be used in medical applications.

Abstract: A composition of matter composed of a thermoplastic elastomeric hydrocarbon block copolymer having 0.1 to 8 percent polysiloxane, or silicone oil, uniformly distributed throughout. The composition exhibits improved surface, elasticity, and tensile strength characteristics as well as superior processibility. The block copolymer may take the form of styrene-ethylene-butylene-styrene in which the styrene blocks have a molecular weight of 5,000 to 40,000 and the ethylene-butylene block has a molecular weight of 20,000 to 500,000. Uniformly dispersed mineral oil may constitute 10 to 60 percent of the composition's total weight which may also include less than 45 percent polypropylene. Combining the copolymer with the silicone oil occurs under the influence of a pressure of 1,500 to 2,500 p.s.i. such as provided by extrusion blending. The resulting elastomeric composition may extrude in sheets as thin as 0.015, 0.010, or even 0.005 inch, which a puller may thin even further.

Abstract: A composition of matter composed of a thermoplastic elastomeric hydrocarbon block copolymer having 0.1 to 8 percent polysiloxane, or silicone oil, uniformly distributed throughout. The composition exhibits improved surface, elasticity, and tensile strength characteristics as well as superior processibility. The block copolymer may take the form of styrene-ethylene-butylene-styrene in which the styrene blocks have a molecular weight of 5,000 to 40,000 and the ethylene-butylene block has a molecular weight of 20,000 to 500,000. Uniformly dispersed mineral oil may constitute 10 to 60 percent of the composition's total weight which may also include less than 45 percent polypropylene. Combining the copolymer with the silicone oil occurs under the influence of a pressure of 1,500 to 2,500 p.s.i. such as provided by extrusion blending. The resulting elastomeric composition may extrude in sheets as thin as 0.015, 0.010, or even 0.005 inch, which a puller may thin even further.

Abstract: This invention provides a composition of matter composed of a substantially uniform mixture of a thermoplastic elastomeric hydrocarbon black copolymer and 0.1 to 12 percent by weight of the composition of a polysiloxane. The composition exhibits improved surface, elasticity, and tensile strength characteristics as well as superior processibility. The block copolymer may comprise blocks of styrene-ethylene-butylene-styrene in which the styrene blocks have a molecular weight of 5,000 to 40,000 and the ethylene-butylene block has a molecular weight of 20,000 to 500,000. Mineral oil and polypropylene are preferably dispersed in the composition. Combining the copolymer with the polysiloxane typically occurs under the influence of a pressure of 1,500 to 2,500 p.s.i. or above, such as provided by extrusion blending. The resulting elastomeric composition may be extruded into sheets as thin as 0.015, 0.010, or even 0.005 inch, which a puller may thin even further.

Abstract: A composition of matter composed of a thermoplastic elastomeric hydrocarbon block copolymer having 0.1 to 8 percent polysiloxane, or silicone oil, uniformly distributed throughout. The composition exhibits improved surface, elasticity, and tensile strength characteristics as well as superior processibility. The block copolymer may take the form of styrene-ethylene-butylene-styrene in which the styrene blocks have a molecular weight of 5,000 to 40,000 and the ethylene-butylene block has a molecular weight of 20,000 to 500,000. Uniformly dispersed mineral oil may constitute 10 to 60 percent of the composition's total weight which may also include less than 45 percent polypropylene. Combining the copolymer with the silicone oil occurs under the influence of a pressure of 1,500 to 2,500 p.s.i. such as provided by extrusion blending. The resulting elastomeric composition may extrude in sheets as thin as 0.015, 0.010 or even 0.005 inch, which a puller may thin even further.

Abstract: A medical splint kit having reusable components and serviceable during the X-raying of the body part involved. The kit has a splint member formed from a material transparent to X-irradiation such as an acrylic plastic. The splint also includes sections of minute loops or hooks to facilitate its affixation to the body member. Straps having hooks or loops, respectively, which will engage the sections on the splint affix the splint to the body. By incorporating sections of both hooks and loops, the strap, after surrounding the body member, will adhere to itself and retain the splint adjacent to and supportive of the injured area. A second splint member may also form part of the kit. A locking device passing through slots in both members hold the members together and provide an adjustable splint that can conform to the particular body member involved. Non-skid surfaces on both splint members will aid the splint in retaining their respective configuration.