Abstract: A bicycle chainring structure is provided. The chainring structure includes a plurality of teeth disposed about the radially outer circumference of the chainring structure and a pairing feature including a wall forming a radially interior profile formed on the chainring structure, the radially interior profile defined by lobes extending radially inward. The chainring structure also includes a torque-transmitting coupling formed in the chainring structure, the torque-transmitting coupling including a plurality of chainring holes disposed in the radially inward extending lobes and configured to receive input torque from a crank arm and transmit the input torque to the plurality of teeth.

Abstract: A bicycle crank arm and chainring carrier assembly. The assembly includes a crank arm. A chainring carrier is sized and shaped to connect to the crank arm. A first pairing feature is formed on one of the crank arm and the chainring carrier and a second pairing feature is formed on the other of the crank arm and the chainring carrier to position the chainring carrier on the crank arm. A clearance is defined between the first and second pairing features when the first and second pairing features are paired. A torque-transmitting coupling between the crank arm and the chainring carrier is configured to transmit substantially all of the torque applied to the chainring carrier from the crank arm.

Abstract: A bicycle crank arm and chainring carrier assembly. The assembly includes a crank arm. A chainring carrier is sized and shaped to connect to the crank arm. A first pairing feature is formed on one of the crank arm and the chainring carrier and a second pairing feature is formed on the other of the crank arm and the chainring carrier to position the chainring carrier on the crank arm. A clearance is defined between the first and second pairing features when the first and second pairing features are paired. A torque-transmitting coupling between the crank arm and the chainring carrier is configured to transmit substantially all of the torque applied to the chainring carrier from the crank arm.

Abstract: The present application relates to an input torque measuring device for a drive train of a bicycle. The drive train includes a first crank arm and a second crank arm. An inboard end of each crank arm is rotatably mounted to the bicycle at a bottom bracket of the bicycle. At least one chain ring is configured to rotate a driven wheel of the bicycle. A spider is connected to the first crank arm adjacent the bottom bracket and extends out to the at least one chain ring. The spider is configured to transmit force applied to the crank arms directly to the at least one chain ring. The spider may include a plurality of sensors configured to respond to the force applied by the spider to the at least one chain ring. The sensors produce an electronic signal relative to the force transmitted by the spider to the at least one chain ring and a processor configured to receive the electronic signals from each sensor of the spider.

Abstract: The present application relates to an input torque measuring device for a drive train of a bicycle. The drive train includes a first crank arm and a second crank arm. An inboard end of each crank arm is rotatably mounted to the bicycle at a bottom bracket of the bicycle. At least one chain ring is configured to rotate a driven wheel of the bicycle. A spider is connected to the first crank arm adjacent the bottom bracket and extends out to the at least one chain ring. The spider is configured to transmit force applied to the crank arms directly to the at least one chain ring. The spider may include a plurality of sensors configured to respond to the force applied by the spider to the at least one chain ring. The sensors produce an electronic signal relative to the force transmitted by the spider to the at least one chain ring and a processor configured to receive the electronic signals from each sensor of the spider.

Abstract: The present application relates to an input torque measuring device for a drive train of a bicycle. The drive train includes a first crank arm and a second crank arm. An inboard end of each crank arm is rotatably mounted to the bicycle at a bottom bracket of the bicycle. At least one chain ring is configured to rotate a driven wheel of the bicycle. A spider is connected to the first crank arm adjacent the bottom bracket and extends out to the at least one chain ring. The spider is configured to transmit force applied to the crank arms directly to the at least one chain ring. The spider may include a plurality of sensors configured to respond to the force applied by the spider to the at least one chain ring. The sensors produce an electronic signal relative to the force transmitted by the spider to the at least one chain ring and a processor configured to receive the electronic signals from each sensor of the spider.

Abstract: The present application relates to an input torque measuring device for a drive train of a bicycle. The drive train includes a first crank arm and a second crank arm. An inboard end of each crank arm is rotatably mounted to the bicycle at a bottom bracket of the bicycle. At least one chain ring is configured to rotate a driven wheel of the bicycle. A spider is connected to the first crank arm adjacent the bottom bracket and extends out to the at least one chain ring. The spider is configured to transmit force applied to the crank arms directly to the at least one chain ring. The spider may include a plurality of sensors configured to respond to the force applied by the spider to the at least one chain ring. The sensors produce an electronic signal relative to the force transmitted by the spider to the at least one chain ring and a processor configured to receive the electronic signals from each sensor of the spider.

Abstract: A separating tank assembly enables a dental vacuum separating tank to be drained without using a pump and without turning off or isolating the vacuum source from the tank. A drain tank is provided in fluid communication with the separating tank, and a control valve controls a pressure differential between the drain tank and the fluid tank. When the separating tank is filling, the drain tank and separating tank pressures are equalized, and the tanks are in fluid communication. When the fluid in the drain tank reaches a predetermined level, the solenoid opens the drain tank to atmosphere, blocking fluid communication between the separating tank and the drain tank and opening fluid communication between the drain tank and a sewer drain. After the fluid is drained, the solenoid reopens fluid communication between the separating tank and the drain tank, and the pressures in the respective tanks are equalized.

Abstract: A vacuum-strength measurement device is utilized to determine vacuum producer system performance specifications and system parameters. A flow ability factor can be determined that represents the effect of system piping and usage area equipment on performance. With the flow ability factor, a vacuum strength requirement can be determined to effect a target vacuum performance. For system design, design parameters can be established based on a relationship between a desired flow ability factor and an amount of vacuum strength required to match target vacuum performance.

Abstract: A vacuum flow measurement device measures the quantity of air flowing into a high-volume evacuator (HVE) vacuum tip commonly found in dental treatment rooms. The device includes a tubular member constructed to mimic internal structural characteristics of a HVE tip. The tubular member includes a valve end coupleable with a HVE valve and an open end. A pressure gauge is connected to the tubular member via a port spaced from the open end of the tubular member. When the vacuum flow measurement device is coupled with the HVE valve, an air flow rate is determined as a function of pressure measured via the pressure gauge.

Abstract: A vacuum flow measurement device measures the quantity of air flowing into a high-volume evacuator (HVE) vacuum tip commonly found in dental treatment rooms. The device includes a tubular member constructed to mimic internal structural characteristics of a HVE tip. The tubular member includes a valve end coupleable with a HVE valve and an open end. A pressure gauge is connected to the tubular member via a port spaced from the open end of the tubular member. When the vacuum flow measurement device is coupled with the HVE valve, an air flow rate is determined as a function of pressure measured via the pressure gauge.