F - Mech Eng,Light,Heat,Weapons – 16 – H
Patent
F - Mech Eng,Light,Heat,Weapons
16
H
142/27
F16H 63/18 (2006.01)
Patent
CA 1231291
SPRING-ASSISTED SHIFT APPARATUS ABSTRACT: Spring-assisted shift apparatus includes a plate (28) rotatable about an axis (A) to a plurality of positions, the plate defining a cam track (32,34). A cam follower (22,26) is operatively associated with the cam track, and is adapted to move a shift fork (16,18) in response to selective rotation of the plate. A spring-assist mechanism includes an assist cam track (58) defined by the plate so as to have an arcuate first track surface (60) with a center of curvature on the axis, and a second track surface (62) oriented such that a line perpendicular thereto does not intersect the axis. A spring member (48) supports an assist cam follower (56) in operative association with the assist cam track such that the assist cam follower (56) is in contact with the first track surface (60) when the plate is in one position, and is in contact with the second track surface (62) when the plate is in another posi- tion. The spring member is stressed so as to apply a preload biasing force on the plate.
463101
Borg-Warner Corporation
Macrae & Co.
LandOfFree
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