Otis Elevator Company

John Hornyack

Louis Bialy

William Aldis Wurts

Rajendra V Mistry

A body of electrorheological ('Smart') fluid is disposed between hydraulic fluid within a hydraulic elevator system, and a chamber filled with pressure absorbing fluid. By introducing a field within the Smart fluid to maintain the Smart fluid in a given phase, the Smart fluid transmits the pulsations from the hydraulic fluid to the pressure absorbing fluid as a function of the pulsations.

Smart accumulator to attenuate pulses in a hydraulic elevator

A mechanism is placed between a plunger and an elevator car to damp the effects of stick-slip encountered during elevator start-up and to minimize the probability of damage to a plunger/cylinder assembly if the elevator car is stopped in an emergency. The mechanism comprises a self-leveling hydraulic shock absorber that operates independently of any stick-slip between the plunger and cylinder.

Growing community of inventors

Tolland, CT, United States of America

John Hornyack