Machine element or mechanism – Gearing – Directly cooperating gears
Patent
1978-07-28
1980-04-29
Foss, J. Franklin
Machine element or mechanism
Gearing
Directly cooperating gears
74 8915, F16H 118
Patent
active
041999991
ABSTRACT:
A low-friction, light-load, low-cost mechanical transmission for converting rotary motion to linear motion, comprising an elongate screw shaft having a rolled thread groove, a multi-part follower nut comprising a sleeve having a through hole constituting a ball socket and a cylindrical jacket encircling the sleeve, there being a thread-engaging ball disposed in the socket and engaging the walls of the thread groove. The bore of the jacket has a hard surface which engages and provides a back-up for the ball as the latter traverses the length of the screw shaft. The sleeve is held captive within the jacket by a pair of locking rings received in annular grooves in the bore of the latter. Surrounding the nut is a tubular housing. Anti-friction sleeve bearings on the exterior of the jacket slidably engage the inner surface of the housing to enable the nut to move freely therein as the screw shaft is rotatably driven. A tubular connector member is telescopically received in the housing and is immovably secured to the jacket by one of the locking rings which hold the sleeve and jacket assembled. An additional bearing between the housing and connector member maintains the latter centralized, thereby eliminating binding or seizing. It is particularly adapted for light-to-moderate load applications, including a conversion in the steering mechanism of boats, between the turning movement of the wheel and the reciprocative movement of the rudder.
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patent: 3206994 (1965-09-01), Angsten
patent: 4000661 (1977-01-01), Menzel
Foss J. Franklin
Lehmann H. Gibner
Lehmann K. Gibner
Norco Inc.
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