Massachusetts Institute of Technology

Daniel Scott Dorsch

Amos Greene Winter, V

Joshua Eric Siegel

Amos G Winter, V

Victor Prost

Sahil Rajesh Shah

Yu Hua

Venkata Narayana Murthy Arelekatti

Chad L Jacoby

Jacob M Jurewicz

Zackary Ryan Eubanks

Young Suk Jo

Patricia Yen

Daria Bondarchuk

Guillermo Pamanes Castillo

Paige L Reiter

A passive artificial knee includes a knee hinge assembly defining a knee axis, a locking hinge assembly defining a locking axis, and a post linking the knee hinge assembly and the locking hinge assembly. A ground reaction force applied to the artificial knee posterior to the locking axis causes an interfering relation by compression of the locking hinge assembly and the knee hinge assembly during heel strike at early-stance gait phase of an individual wearing the artificial knee, thereby locking rotation of the post about the knee axis. Shifting of ground reaction force anterior to the locking axis during a mid-stance to late-stance gait phase of the individual causes rotation of the post about the locking axis, thereby unlocking rotation of the post about the knee axis and enabling flexion and subsequent swing phase extension of the passive artificial knee joint. The artificial knee is a passive joint that can be fabricated and maintained at low expense.

Passive artificial knee

An apparatus includes a drive shaft, a transmission, a motor shaft, and an engine shaft. The drive shaft includes several drive gears and is used to transmit power to a wheel of a vehicle. The transmission includes a first transmission subassembly and a second transmission subassembly, each subassembly having a transmission shaft, an input gear, and several output gears. Each transmission shaft includes a shifting element to select an output gear. Each transmission subassembly transmits power to the drive shaft when the shifting element of each respective subassembly is engaged. The motor shaft is coupled to a motor and is also directly coupled to the first transmission subassembly via a first motor gear. The motor shaft is also coupled to the engine shaft via a second motor gear. The engine shaft includes several engine gears to couple the engine shaft to the first and second transmission subassemblies.

Dual-shaft clutchless hybrid transmission

An apparatus for a clutchless manual transmission includes a transmission, a drive shaft, and a motor shaft. The transmission includes an input shaft, an output shaft, and an intermediate gear. The input shaft is coupled to an engine shaft to receive power and the output shaft is coupled to the drive shaft to transmit power to a wheel of a vehicle. The input shaft and output shaft are coupled by a plurality of input and output shaft gears. A first synchronizer is coupled to the output shaft to selectively engage a particular output shaft gear, adjusting the speed of the output shaft relative to the input shaft. The motor shaft receives power from a motor and includes a second synchronizer to selectively engage the engine shaft to the drive shaft via the motor shaft. The apparatus can be used to reduce acceleration and turbo lag in hybrid and high-performance vehicles.

Clutchless shifting of a manual transmission

Growing community of inventors

Cambridge, MA, United States of America

Daniel Scott Dorsch