Abstract: Well-working fluid compositions containing certain processed inorganic, oil and water wettable ground elastomeric crumb rubber materials to decrease the seepage loss of various fluids to subterranean formations in which these well working fluids are required and utilized are disclosed. Also disclosed is a method of reducing the seepage and whole mud loss of these well working fluids utilizing such ground elastomeric crumb rubber materials.

Abstract: A device for controlling the velocity of an electric motor is provided. The device combines a traditional PI (Proportional+Integral) velocity controller with a robust mapping technique that estimates the velocity of the motor. The mapping technique is based on fuzzy logic methods, and provides a robust estimate of the motor's rotational velocity by using the motor current measurement and pulse-width modulated (PWM) voltage being applied to the motor. In one embodiment the device is combined with a calibration technique which ensures the proper calibration of the motor.

Abstract: A device for impregnating a paper web with a molten polymer to produce a paper with improved resistance to oil and grease are provided. The device includes, as part of an on-machine process, an ordinary paper web composed of cellulose or synthetic fibers, a polymer applicator, a hot reel, and a winding reel. The web, which is created through a series of processes located upstream of the subject invention, first encounters the polymer applicator, which deposits a quantity of molten polymer onto the surface of the web. The web is next transferred to a hot reel, which maintains the temperature of the molten polymer above its melting point and thereby facilitates wicking of the molten polymer into the web. After the web passes the hot reel, it is wound onto a winding reel, where additional wicking occurs until the molten polymer cools to a temperature below its melting point.

Abstract: An improved tubular metal base ball bat that includes a damping device having a mass suspended by a number of resilient supports that is mechanically coupled to the hand gripping end of the bat.

Abstract: The apparatus includes three 1.5 volt D-size batteries and two electric motors with arms and/or shafts extending to the head and tail area. The apparatus is mounted inside a commercial duck decoy and provides vertical head movement and propulsion with resulting water splashing and rippling actions when the decoy is afloat. These motions enhance the attraction of the decoys to flying waterfowl.

Abstract: A water fowl (e.g. duck) decoy system in which the decoy's wings (20/120), which are flat and both longitudinally and laterally extended by, for example, having one or more, curved lobes (23/123A&B, note FIGS. 1& 5B), producing a disc like shape, preferably of a size of at least about nine (9″) inches in “diameter,” with contrasting colors (e.g., dark olive & white; cf. FIGS. 5B & 5C) on its flat sides with one or more stripes on its lighter side, are rotated at a relatively high speed (e.g., ˜600 rpm+, e.g., more particularly ˜600 or ˜750 rpm or up to ˜900 rpm or greater), producing a “strobe” like effect for enhanced visibility of the decoy to flying ducks. Additionally, the decoy (1/101) has a laterally disposed, direct, in-line, DC electric motor drive (30), with laterally directed, dual shaft connectors (note FIG. 3) directly connected to the wings.

Abstract: An aerial photography device is disclosed. The device includes a blimp filled with lighter than air gas or some other structure which will keep the device aloft. The device will also include a servo platform for positioning and moving the aerial photography device in the air and a camera platform. Both the servo platform and camera platform are attached to a servo frame, which in turn is attached to the blimp. The camera platform has a camera mount which is pivotable about at least one axis of rotation. A remote transmitter and a receiver mounted on the device allow an operator to remotely control the servo platform and the camera platform.

Abstract: A electromagnetic machine is provided. The machine has a rigid elongated hollow shell, open at both ends, which is bigger at its midsection than at either end. The shell is wrapped with a wire which is connected to a power source so that the device can be energized. A pliable elongated pouch is at least partially within the shell and the two ends of the pouch protrude from the open ends of the shell. Magnetizable particles are contained within the pouch. When current is flowed through the wire, the particles are attracted radially outward at the biggest section of the shell. As the particles move they deform the pouch and the two ends of the pouch are brought closer together. Work can be performed by attaching objects to the two ends of the pouch.

Abstract: A digital circuit for determining the result of mathematical operations and functions when supplied with three binary values having a fixed number of binary bits which correspond to: (i) an initial left boundary limit of a first interval, (ii) an initial right boundary limit of a first interval, and (iii) a given working value.

Abstract: A safety syringe is disclosed. The syringe includes a syringe barrel, a plunger, a needle, a needle sleeve, and a pushrod. At one of the pushrod is attached to the needle sleeve while the other end of the pushrod protrudes slightly into the needle end of the syringe barrel. When the injection is administered to the patient, the plunger travels all the way to the needle end of the syringe barrel. The plunger contacts the pushrod which causes the sleeve to cover the needle point automatically as the injection is given.

Abstract: A adjustable bed extender which is attachable to the receiver orifice of a standard receiver hitch is disclosed. The device provides support for loads which extend beyond the bed of a truck or any vehicle having a bed. The device includes a drawbar which fits into the receiver orifice of the hitch already permanently to the vehicle, a support assembly which supports the load, and an adjustable connection between the support assembly and drawbar for adjusting the height of the support assembly for different vehicle models and tailgate configuration.

Abstract: A splash bar is provided for use in a water cooling tower, the splash bar comprising an elongated body portion having a tubular central rib and a plurality of wing members, each wing member extending laterally from the central rib, the wing members each having a plurality of apertures therethrough. The surface formed by the wing members is preferably sloped, and the tubular central rib preferably has a triangular cross section.

Abstract: A sports practice cage is disclosed. U-shaped side frames attach to a solid flat cage base, and horizontal poles connect the side frames to form the basic cage frame. Netting is suspended from the cage frame, with one side of the cage left open, so that a five-sided chamber is formed. A platform is connected to the cage base at the open end of the chamber, and a tee may be mounted on the platform. In an alternate embodiment the platform is a golf platform, and a golf tee pad is attached to the golf platform.

Abstract: A knife having angularly adjustable cutting positions is provided, comprising a blade having a base portion, the base portion having an outer edge including an engagement portion including a positioning mechanism for positioning the blade in multiple angular cutting positions with reference to a handle; a handle including a biased locking member for selectively engaging the positioning mechanism and fixing the blade in each of the angular cutting positions, the handle having a blade end; a spring, positioned in the handle, for biasing the locking member against the positioning mechanism; and wherein the base portion of the blade is pivotally attached to the blade end of the handle at a pivot point located within the blade end.