Machine element or mechanism – Gearing – Rotary bodies
Patent
1999-03-25
2000-09-19
Fenstermacher, David
Machine element or mechanism
Gearing
Rotary bodies
74 8915, 744248R, F16H 5518
Patent
active
061195413
ABSTRACT:
An adjustable nut for mounting a movable working assembly to a lead screw having a longitudinal axis and a thread, and methods for adjusting lead screw nuts. In one embodiment, the adjustable nut has a first member, a second member and an adjustment assembly. The first and second members of this embodiment are configured to threadably engage the thread on the lead screw. The second member can be coupled to the first member to prevent relative rotation between the first and second members, and to allow axial displacement between the first and second members along the longitudinal axis of the lead screw. The adjustment assembly of this embodiment includes a biasing element coupled to the first and second members to exert an axial drive force with respect to the longitudinal axis of the lead screw that drives the first and second members apart from one another. The biasing element of this embodiment is selectively adjustable to increase or decrease the axial drive force without disassembling the biasing element from the first or second member. In another embodiment, the adjustment assembly further includes a third member threadably engaged with the second member. In this embodiment, the first member has a first contact surface and the third member has a second contact surface facing the first contact surface. The biasing element extends between the first and second contact surfaces to exert the axial drive force against the first and second contact surfaces. The third member can be rotated with respect to the second member to move the second surface axially with respect to the first surface for increasing or decreasing the axial drive force exerted by the biasing element.
REFERENCES:
patent: 5732596 (1998-03-01), Erikson et al.
patent: 5839321 (1998-11-01), Siemons
patent: 6041671 (2000-03-01), Erikson et al.
Fenstermacher David
Micron Electronics Inc.
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