Abstract: A rotor assembly for a peristaltic pump is provided. Each of a first pair of roller assemblies includes a first roller portion having a first diameter and a second roller portion having a second diameter. The first diameter is larger than the second diameter. Each of a second pair of roller assemblies includes a first roller portion having a first diameter and a second roller portion having a second diameter. The first diameter is smaller than the second diameter. The first and second pairs of roller assemblies are positionable around a circumference of a hub such that the first roller portion of the first pair of roller assemblies is aligned with the first roller portion of the second pair of roller assemblies and the second roller portion of the first pair of roller assemblies is aligned with the second roller portion of the second pair of roller assemblies.

Abstract: A pump can include a pump head, a body housing, a motor disposed within the body housing, and a motor shaft extending from the motor. The pump head can include a sensor, at least a first interface portion, and at least a first elongate conductor electrically connecting the sensor to the at least a first interface portion. The body housing can include at least a second interface portion and at least a second elongate conductor electrically connecting the at least a second interface portion to pump electronics. The sensor can be configured to sense when the at least a first interface portion does not contact the at least a second interface portion. When the at least a first interface portion does not contact the at least a second interface portion and the pump head is removed from the body housing, the pump head can be pivotable relative the motor shaft such that an orientation of the pump head can be changed with respect to the body housing.

Abstract: A method of calibrating a pump system can include providing a pump, calibrating a pump input with an input device connected to the pump, and calibrating a pump output with an output device connected to the pump. Calibrating the pump input can include selecting a first input signal value, generating a transmitted input signal corresponding to the first input signal value, and setting a nominative pump input value to the first input signal value. Calibrating the pump output can include receiving a received output signal outputted from the pump, and setting a nominative pump output value to the first input signal value.

Abstract: A flow rate assembly can include a fluid flow interface portion having a front facing wall and a back facing wall. The flow interface portion can include an inlet passage within the fluid flow interface portion, an outlet passage within the fluid flow interface portion, at least one inlet aperture extending through the front facing wall of the fluid flow interface portion into the inlet passage, and at least one outlet aperture extending through the back facing wall of the fluid flow interface portion into the outlet passage. In some cases, the fluid flow interface portion includes a plug forming at least a portion of the inlet passage.

Abstract: A flow rate assembly can include a fluid flow interface portion having a front facing wall and a back facing wall. The flow interface portion can include an inlet passage within the fluid flow interface portion, an outlet passage within the fluid flow interface portion, at least one inlet aperture extending through the front facing wall of the fluid flow interface portion into the inlet passage, and at least one outlet aperture extending through the back facing wall of the fluid flow interface portion into the outlet passage. In some cases, the fluid flow interface portion includes a plug forming at least a portion of the inlet passage.

Abstract: A flow rate assembly can include a fluid flow interface portion having a front facing wall and a back facing wall. The flow interface portion can include an inlet passage within the fluid flow interface portion, an outlet passage within the fluid flow interface portion, at least one inlet aperture extending through the front facing wall of the fluid flow interface portion into the inlet passage, and at least one outlet aperture extending through the back facing wall of the fluid flow interface portion into the outlet passage. In some cases, the fluid flow interface portion includes a plug forming at least a portion of the inlet passage.

Abstract: A flow rate assembly can include a fluid flow interface portion having a front facing wall and a back facing wall. The flow interface portion can include an inlet passage within the fluid flow interface portion, an outlet passage within the fluid flow interface portion, at least one inlet aperture extending through the front facing wall of the fluid flow interface portion into the inlet passage, and at least one outlet aperture extending through the back facing wall of the fluid flow interface portion into the outlet passage. In some cases, the fluid flow interface portion includes a plug forming at least a portion of the inlet passage.

Abstract: A flow rate assembly can include a fluid flow interface portion having a front facing wall and a back facing wall. The flow interface portion can include an inlet passage within the fluid flow interface portion, an outlet passage within the fluid flow interface portion, at least one inlet aperture extending through the front facing wall of the fluid flow interface portion into the inlet passage, and at least one outlet aperture extending through the back facing wall of the fluid flow interface portion into the outlet passage. In some cases, the fluid flow interface portion includes a plug forming at least a portion of the inlet passage.

Abstract: A flow rate assembly can include a fluid flow interface portion having a front facing wall and a back facing wall. The flow interface portion can include an inlet passage within the fluid flow interface portion, an outlet passage within the fluid flow interface portion, at least one inlet aperture extending through the front facing wall of the fluid flow interface portion into the inlet passage, and at least one outlet aperture extending through the back facing wall of the fluid flow interface portion into the outlet passage. In some cases, the fluid flow interface portion includes a plug forming at least a portion of the inlet passage.

Abstract: A constant velocity transmission which provides maximum torque and speed from a power source such as an internal combustion engine to an output shaft of the transmission while maintaining the engine at optimum operational speed. The transmission takes advantage of the principle of fluid friction to transmit rotational forces from drive blades mounted on an input shaft to stater blades positioned on the inside of a drum encompassing one end of the input shaft and the drive blades. The drive blades slidably mounted on a slanted surface of a drive drum on the input shaft and move closer to and away from the stater blades when laterally translated. Fluid driven by the drive blades imparts varied force and torque to the stater blades depending on their distance therefrom thereby transmitting variable speed and torque to the output shaft attached to the drum.

Abstract: A constant velocity transmission which provides maximum torque and speed from a power source such as an internal combustion engine to and output shaft of the transmission while maintaining the engine at optimum operational speed. The transmission takes advantage of the principle of fluid friction to transmit rotational forces from drive blades mounted on an input shaft to stater blades positioned on the inside of a drum encompassing one end of the input shaft and the drive blades. The drive blades slidably mounted on a slanted surface of a drive drum on the input shaft and move closer to and away from the stater blades when laterally translated. Fluid driven by the drive blades imparts varied force and torque to the stater blades depending on their distance therefrom thereby transmitting variable speed and torque to the output shaft attached to the drum.

Abstract: In the process of pyrolyzing chlorodifluoromethane to form tetrafluoroethylene, yield is improved by having a controlled concentration of perfluorocyclobutane in the feed to pyrolysis.