Machine element or mechanism – Mechanical movements – Grip units and features
Patent
1979-10-12
1981-12-15
Husar, C. J.
Machine element or mechanism
Mechanical movements
Grip units and features
74208, 417 24, 417223, F16H 1508
Patent
active
043053068
ABSTRACT:
A rotatable input shaft (1) drives a rotatable output shaft (18) through a roller (7) which roller is displaceable along its rotational axis (8) while maintaining driving engagement with drive faces (6 and 14) of the shafts (1 and 18) respectively to vary the drive ratio through the assembly. The roller (7) is controlled in its displacement by a piston and cylinder device (10, 11) to which fluid pressure is directed under control of a spool valve (22). The spool (26) of valve (22) is displaceable to determine fluid flow towards and from the piston chambers (12 and 13) of the piston and cylinder device under control of the speed of rotation of the output shaft (18) through a centrifugal governor (34) and a push rod (33) reacting between the spool (26) and the governor (34). If the rotational speed of shaft (18) varies substantially from a predetermined value (for example by variations in rotational speed of the input shaft (1)) the governor (34) reacts to displace the spool (26) in a manner which directs fluid pressure to piston chambers (12 and 13) and displaces the roller (7) in a sense to increase or decrease the mechanical advantage at which drive is transmitted between the input and output shafts to adjust the rotational speed of the output shaft (18) and maintain it substantially constant.
REFERENCES:
patent: 2982147 (1961-05-01), Painhard
patent: 3372600 (1968-03-01), Opocensky
patent: 3654812 (1972-04-01), Rouverol
patent: 3745844 (1973-07-01), Schottler
patent: 3875814 (1975-04-01), Stever
patent: 3935707 (1976-02-01), Murphy et al.
patent: 3973540 (1976-08-01), List
patent: 4170438 (1979-10-01), Kondo et al.
patent: 4173152 (1979-11-01), Kondo et al.
Cam Gears Limited
Cohen Moshe I.
Husar C. J.
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