A simple change gear transmission utilizing an improved clutch structure and/or an improved idler structure to provide compounded countershafts is provided. The improved clutch structure involves the use of axially adjacent tube clutch members (76, 90) operated by side-by-side shift forks (86, 100) to selectively clutch one at a time four axially adjacent mainshaft gears (50, 52, 54, 56) to a mainshaft (18). Compound countershaft (16) comprising a forward portion (20) and a rearward portion (22)...

Disclosed is a displacement pump especially suited for use in very small well bores. The pump includes a piston working in a cylinder, driven by a rotating cam shaft having closed loop cams for effecting reciprocation of the piston. The rotating cam shaft carries spool valves for positive control of liquid flow into and out of the pumping chambers. Also disclosed is a transmission mechanism especially suitable for use in reducing the speed of an electric motor power source to a level suitable fo...

An automatic transmission providing variable speed ratio and reverse drives between drive and driven shafts and including friction-engaging devices, in the form of friction clutches and brakes, for establishing the drives. The devices are operable by hydraulic servomotors, certain servomotors each having first and second pistons arranged in tandem, with the first piston being movable by hydraulic fluid to engage the associated friction device, the second piston being movable by hydraulic fluid t...

A two-speed vehicular accessory drive mechanism including an input pulley, an output shaft, a planetary unit having its sun member connected to the output shaft and its carrier driven by the input pulley, vacuum-responsive means for holding the outer ring member of the planetary unit stationary at low engine speeds to thus cause the output shaft to be driven at an increased speed ratio, and a one-way clutch arrangement between the input pulley and the output shaft to drive the latter at input sp...

An improved split torque gear reducer transmission is disclosed which incorporates an improved novel ratio range selector transmission control and a disengaging mechanism for eliminating creep while the transmission is in the neutral mode. The ratio range selector comprises a lockable control lever moving a pivotable gear segment and gear rack to position the transmission elements in the desired mode.

A transmission providing three (3) forward and two (2) reverse speed ratios, including a torque converter unit, input and output shafts, three planetary gear sets, a brake operatively connected to the ring gear of each gear set, interconnecting carriers and connector members, and a pair of disc-type clutches, the driving discs of both clutches being actuated by the torque converter output, with the driven discs of one clutch being connected to an input shaft on which the sun gears of two of the ...

A transmission in which a rotation of one or more gears and a rotation of at least one annular set of pinions imparted by a swash plate through a screw spindle system are superposed to effect a stepless variable transmission.

A change-speed transmission with a shift mechanism which selectively couples a plurality of change gears one at a time to a shaft on which the gears are journalled. The shift mechanism is disposed entirely within the transmission housing and includes a shift key arranged for axial sliding movement in a groove in the shaft. A pair of axially spaced projections at one end of the key project outwardly of the groove to embrace a collar which is journalled on the shaft. The collar is axially shifted ...

An automatic transmission providing variable speed ratio and reverse drives between drive and driven shafts and including friction-engaging devices, in the form of friction clutches and brakes, for establishing the drives. The devices are operable by hydraulic servomotors, certain servomotors each having first and second pistons arranged in tandem, with the first piston being movable by hydraulic fluid to engage the associated friction device, the second piston being movable by hydraulic fluid t...

A transmission having a hydraulic torque converter driving a plurality of planetary gearsets in pure hydraulic drive in starting position. The drive is changed to part hydraulic part direct driven when the torque converter has accelerated the first gearset input member to a predetermined speed. The hydraulic drive of the torque converter then drives the gearset reaction members, and the engine shaft which drives the torque converter directly drives the first gearset input member. Since the gear ...