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US 7,124,861 B2Granted
Motion control apparatus
AssigneeNexen Group, Inc.
InventorJeffrey M. Maher
Life of this patent
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Abstract
A brake (10) having application for a linear or rotational motion device includes a housing (120) in which a first piston (140), a wedge (142) and a second piston (144) cooperate to engage a friction facing (136) through a plurality of rollers (152, 154, 156, 158). The three part piston assembly (148) allows a braking action and prevents torsional forces that are non-axial to the axis of the first piston (140) and second piston (144). The pistons (140, 144) are biased by compression springs (176) and may be actuated by a fluid.
Claims18
Apparatus comprising, in combination:
- a wedge moveable along a first axis, with the wedge having a wedge surface arranged nonparallel to the first axis;
- an actuator moveable along a second axis perpendicular to the first axis, with the actuator having a wedge engaging surface slideably mounted on the wedge surface, with the actuator having a friction creating portion;
- an adjustable guide, with the adjustable guide disposed to adjust the wedge in the second axis, with movement of the actuator along the second axis being dependent on movement of the wedge along the first axis;
- and a wedge axial mover in contact with but not attached to the wedge for moving the wedge in both directions along the first axis, with the axial mover being isolated from any forces perpendicular to the first axis.
1 more element
Dependencies are inferred from the claim text.