FIELD: mechanical engineering. SUBSTANCE: protective device has turnable cover 8 and drive mechanism with screw drive with carrier 6 and power cylinder 1 furnished with pull-back spring 4. Screw drive and power cylinder 1 are arranged coaxially with axis of rotation of cover 8. Screw drive is made in form of pin 5 connected with rod 2 of power cylinder 1. Pin 5 engages with longitudinal slot made in carrier 6 and consisting of two sections: longitudinal straight line section L and screw section D engaging with straight line section. Screw section D is non-self-braking, while section L provides fixing of cover. EFFECT: enhanced reliability of protection. 3 dwg
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Authors
Dates
1997-03-27—Published
1992-12-08—Filed