Abstract: Disclosed are various embodiments for a table miter saw. The table miter saw allows for cross cuts, bevel cuts, as well as miter cuts and is an improvement over common table saws. The table miter saw includes a platform, orbiting base, and a telescoping assembly that allows for pushing and pulling the saw blade apparatus for mitering safety and ease of use. Additional benefits include the ability to combine multiple carpentry and woodworking tools into one compact device that is easily transferrable to the jobsite.

Abstract: A power transmission switching mechanism for office machine. The power transmission switching mechanism has simple structure and enables the office machine to commonly use a motor to execute scanning and printing works. The power transmission switching mechanism includes a rotary shaft, a drive gear mounted on the rotary shaft, an actuator reciprocally movable on the rotary shaft and a driving gear for transmitting power of a motor to the drive gear. The drive gear has an spline. The actuator can be selectively moved forward or backward to make the spline disengaged from a first gear mounted on the rotary shaft or engaged with the first gear. When the spline is disengaged from the first gear, the power of the motor is transmitted to a scanning module. When the spline is engaged with the first gear, the power of the motor is transmitted to the rotary shaft for printing work.

Abstract: A power transmission switching mechanism for office machine. The power transmission switching mechanism has simple structure and enables the office machine to commonly use a motor to execute scanning and printing works. The power transmission switching mechanism includes a rotary shaft, a drive gear mounted on the rotary shaft, an actuator reciprocally movable on the rotary shaft and a driving gear for transmitting power of a motor to the drive gear. The drive gear has an spline. The actuator can be selectively moved forward or backward to make the spline disengaged from a first gear mounted on the rotary shaft or engaged with the first gear. When the spline is disengaged from the first gear, the power of the motor is transmitted to a scanning module. When the spline is engaged with the first gear, the power of the motor is transmitted to the rotary shaft for printing work.

Abstract: A bicycle drive system includes a front gear face, a rear gear face, a front guide assembly, a rear guide assembly, and a drive shaft coupled to a rear-suspension frame via a rear hub and a crank spindle. The bicycle drive system operates independently of the frame. Shifting from one gear to another is controlled by a shift controller. Each shift of the shift controller shifts both the front and rear guide assemblies at the same time. The shift controller is preferably coupled to the front and rear guide assemblies via a cable system.

Abstract: A miter gear transmission includes a driving shaft, an idler cluster and a driven shaft. The idler cluster includes two cone-shaped gear sets, each having a proximate end with a gear having a largest number of teeth and a distal end with a gear having a smallest number of teeth. Gears with a decreasing number of teeth are located between the proximate and distal ends. The two gear sets are joined at their proximate ends. The idler cluster is suspended in bearings at a 45 degree angle between the driving and driven shafts with first and second spur gears slidably engaged to the shafts. Two actuator moves the spur gears along the shafts to engage the gear teeth of each of gears of the gear sets. By moving the spur gears to engage different gears, different gear ratios are achieved. A cable loop shifter moves the actuators along the shafts.

Abstract: The present invention concerns a mechanical steering transmission unit comprising an input drive shaft and two output driven shafts that can revolve in the same or opposite direction at the same speed.

Abstract: This design is for a motor vehicle drivetrain utilizing flywheel rotation to store energy during the vehicle trip, either storing energy when accellerated, or releasing energy when slowed depending on the vehicle power requirements. At the same time the engine is allowed to operate at a constant RPM and throttle setting, determined by the best thermal efficiency of the engine selected (the engine itself is not a part of this patent application). The continously variable speeds of the vehicle are made possible by the design's transmissions using sintered metal construction, a cogged drive belt, and a pattern of surface protrusions meshing with the cogged drive belt. The flywheels are slightly offset to allow simple gear meshing, and are counter-rotating to cancel out flywheel precession and torque reaction when providing power to the drive wheels. This eliminates any adverse effect on the vehicle's behavior that might otherwise result such as causing the vehicle to spin on slippery surfaces.

Abstract: A reverse gear device of a combined variable transmission system includes a housing which is mounted on the rear wheel axle of a motor scooter for housing a drive bevel gear, a driven bevel gear, an idle bevel gear, an idle gear shaft, shifting forks, and a sector plate cam. The drive bevel gear and the driven bevel gear are identical in specification to each other and are mounted at two sides of the rear wheel axle on the basis of a toothed cone center. The drive bevel gear and the driven bevel gear are provided with a groove facing the toothed cone center. The drive bevel gear is disposed with the axle by a spline hole. The driven bevel gear is disposed with the axle by a round hole for the power transmission in the forward motion.

Abstract: A multiple speed shaft drive for a bicycle, including: a forward disk having a plurality of concentrically disposed ring gears, wherein the forward disk is connected with the pedal crank of the bicycle; a rearward disk having a plurality of concentrically disposed ring gears, wherein the rearward disk is connected to the rear wheel hub; a forward drive shaft; a rearward drive shaft; a free wheel mechanism connecting the forward drive shaft to the rearward drive shaft; a forward pinion gear slidably mounted to the forward drive shaft; a rearward pinion gear slidably mounted to the rearward drive shaft; a forward gear shift mechanism for moving the forward pinion gear into gearing engagement with a selected ring gear of the forward disk; a rearward gear shift mechanism for moving the rearward pinion gear into gearing engagement with a selected ring gear of the rearward disk; and a clutch mechanism which automatically disengages the rearward hub from gearing engagement with the rearward pinion gear whenever a ge

Abstract: A shift fork for a forward-reverse shift mechanism has a hydraulic piston portion for moving the shift fork. The piston is controlled by a hydraulic valve system. The valve system is effective to delay the engagement of the respective forward and reverse, hydraulically-operated, torque transfer devices. The shift fork will enforce the establishment of the proper power path through a synchronizer prior to the engagement of the torque transfer control devices.

Abstract: This invention relates to bicycles, specifically to an improved speed changing mechanism for a bicycle. The primary attribute of this invention is the utilization of a pair of pinion shafts and a pair of face gears to accomplish variation in speed. The face gear teeth and pinion are designed so that only one pair of teeth mesh at a time so that effectively they run as a pair of spur gears. The pinion shafts both forward and aft float inside a telescopic sleeve which allows a large number of gear ratios to be installed on the bicycle. The telescopic sleeve functions as a drive shaft connecting the output of the crank to a follower. The cyclist can select a gear ratio at the crank end by positioning the forward pinion. The aft pinion is positioned by a cable plus a cable lever. The invention eliminates the chain and provides a constant speed ratio at the crank. The telescopic sleeve eliminates the tension in the chain and will increase bearing life.

Abstract: A multispeed, shaft-driven drive for a human propelled vehicle has a driving gear set of concentric ring gears, a driven gear set of concentric ring gears, a rotatable drive shaft having a pinion on each end and a control mechanism for moving the pinions axially of the shaft and into and out of engagement with selected ring gears.

Abstract: A gearing system for a lathe is shiftable from a first position, in which conical gear wheels (16, 25, 26, 36) engage each other with play, to a second position, in which the wheels engage each other without play. Reduced wear is achieved in the first position. High precision is achieved in the second position. Preferably, the system also has parallel-toothed gear wheels (15, 24, 35) which are engaged when the conical gear wheels are disengaged.

Abstract: A multi-speed transmission has particular usefulness in bicycles, completely eliminating the use of the commonly used derailleur and the exposed flexible cable and the readjustment problems inherent with that prior structure. The transmission includes separate concentric gear rings which to a certain extent operate independently of each other. A shift mechanism for shifting the transmission is such the transmission can not be shifted from one gear to a non-adjacent gear without stopping at a gear therebetween. That is, no gear can be skipped. This is accomplished by a particular relationship of a pawl, a pusher, a shift segment plate and barrels mounted on the shift segment plate, among other parts.