Machine element or mechanism – Gearing – With brake means for gearing
Patent
1985-03-15
1986-12-16
Hershkovitz, Abraham
Machine element or mechanism
Gearing
With brake means for gearing
92 17, 92 23, 92131, 188 31, 310 77, F16H 5710
Patent
active
046287523
ABSTRACT:
An actuator assembly has two actuators mounted back-to-back such that their actuator rods are displaced in opposite directions. Each actuator has a spring embracing the rod between two slidable collars. The spring urges the collars apart towards stops on the rod and stops on the actuator housing, so that, on failure of the actuator, the rod is displaced to a central position. The rod is driven by a motor which also rotates two discs of different diameters. Each disc has a notch in its edge which align only at the central position of the rod and allow a roller to drop into the notch. When the actuator fails, a solenoid releases a locking arm which engages the rollers, keeping them in the notches thereby preventing rotation of the discs and displacement of the rod.
REFERENCES:
patent: 2835459 (1958-05-01), Stewart
patent: 3050943 (1962-08-01), Thorel
patent: 3177982 (1965-04-01), Geyer
patent: 3777620 (1973-12-01), Schultheiss
patent: 3886255 (1975-05-01), Noly
patent: 4033233 (1977-07-01), Toi
patent: 4173322 (1979-11-01), Macdonald
patent: 4509408 (1985-04-01), Kuroda
patent: 4526058 (1985-07-01), Runkel
patent: 4557746 (1985-12-01), Braithwaite
Paxton William G.
Wilkinson Derek
Hershkovitz Abraham
Smiths Industries Public Limited Company
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