Abstract: A hydraulic rotational actuator is provided for imparting rotational resistance, or powered rotation, thereby allowing for complete control of shaft, or axle, rotation or rotational resistance within the range of rotation. The hydraulic rotational actuator comprises a casing comprising a pair of cylinders with fluid in each cylinder. A pair of ports is in flow communication within each other wherein each port of is in flow relationship with a separate cylinder. A controller is provided which is capable of controlling flow of fluid between ports. A pair of pistons is provided wherein each piston is in a separate cylinder and engaged with the fluid such that the piston moves in the cylinder in response to fluid volume changing in the cylinder. A pair of connector rods is provided wherein each connector rod is pivotally attached to a separate piston.

Abstract: A modular exercise system is described wherein the system utilizes a universal hydraulic actuator attached to a mount. A connector is attached to the universal hydraulic actuator opposite the mount. The universal hydraulic actuator preferably comprises two hydraulic rotary actuators with non-parallel axis of rotation.

Abstract: A barrel assembly for use in a firearm that reduces the static bond due to propellant pressure between the cartridge case and the barrel chamber. The barrel assembly has a barrel with a rifled bore, and a chamber for receiving a cartridge therein. The barrel chamber having a throat portion adjacent the rifled bore, and the chamber also having a body portion for receiving the cartridge case therein. The cartridge comprising a cylindrical cartridge case, a bullet engaged within the cartridge case. The cartridge case contains a propellant producing a propellant pressure upon ignition of the propellant. A barrel sleeve configured to receive the barrel within and to positively engage the barrel. A recess is formed between the barrel and barrel sleeve, forming a propellant pressure interconnect passage.

Abstract: A barrel assembly for use in a firearm that reduces the static bond due to propellant pressure between the cartridge case and the barrel chamber. The barrel assembly has a barrel with a rifled bore, and a chamber for receiving a cartridge therein. The barrel chamber having a throat portion adjacent the rifled bore, and the chamber also having a body portion for receiving the cartridge case therein. The cartridge comprising a cylindrical cartridge case, a bullet engaged within the cartridge case. The cartridge case contains a propellant producing a propellant pressure upon ignition of the propellant. A barrel sleeve configured to receive the barrel within and to positively engage the barrel. A recess is formed between the barrel and barrel sleeve, forming a propellant pressure interconnect passage.

Abstract: Menstrual fluid simulants may consistently emulate the physical characteristics of real menstrual fluid, including but not limited to, viscosity, stringiness, surface tension and size and concentration of particulate matter. In addition, the constituents comprising the menstrual fluid simulants may be changed in order to mimic the variations in real menstrual fluid observed from woman to woman and from an individual woman over time. The menstrual fluid simulants are of use in the testing of personal care absorbent products.

Abstract: Disclosed herein are embodiments of a method of predicting and adjusting the viscosity of consumer product compositions prior to their final formulation. The prediction aides the determination of the amount of a viscosity modifier to introduce in the manufacture of the final formulation to ensure the compositions have viscosities that satisfies consumer preferences, among other things.

Abstract: Menstrual fluid simulants may consistently emulate the physical characteristics of real menstrual fluid, including but not limited to, viscosity, stringiness, surface tension and size and concentration of particulate matter. In addition, the constituents comprising the menstrual fluid simulants may be changed in order to mimic the variations in real menstrual fluid observed from woman to woman and from an individual woman over time. The menstrual fluid simulants are of use in the testing of personal care absorbent products.

Abstract: Menstrual fluid simulants may consistently emulate the physical characteristics of real menstrual fluid, including but not limited to, viscosity, stringiness, surface tension and size and concentration of particulate matter. In addition, the constituents comprising the menstrual fluid simulants may be changed in order to mimic the variations in real menstrual fluid observed from woman to woman and from an individual woman over time. The menstrual fluid simulants are of use in the testing of personal care absorbent products.

Abstract: Disclosed as an apparatus for measuring at least one performance metric of an athlete. The apparatus comprises an elongated tether with a first end and a second end. An attachment means is attached to the first end of the elongated tether wherein the attachment means can be attached to the athlete. A vertical jump by the athlete causes a displacement of the elongated tether proportional to a distance, or height, of the vertical jump. A retractor is attached to the second end of the elongated tether to withdraw the elongated tether after a jump. An encoder determines a magnitude of the displacement of the elongated tether and generates a signal proportional to the magnitude. A conversion device receives the signal from the encoder and converts the signal to the performance metric. An output device reports the performance metric.