Wedge clamp type termination for elevator tension member
AssigneeOtis Elevator Company
InventorsRichard J. Ericson, Dennis J. Rehmer, Pedro S. Baranda
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Abstract
A tension member termination device optimized for terminating flat tension members having compressible outer coatings, the device including a wedge and a socket each having cooperating surfaces positioned at a predetermined angle for clamping the tension member therebetween. The angle reliably secures the tension member while avoiding deleterious pressure and stress upon the tension member. The invention also provides a safety clamp for optional use with the tension member termination device.
Claims20
A termination device for a tension member having an elastomer coating, the termination device comprising:
- a socket having at least one jaw surface;
- and
- a wedge having a centerline and at least one clamping surface positioned at a predetermined angle from the centerline, the wedge disposed within the socket with the at least one clamping surface juxtaposed to the jaw surface, wherein the predetermined angle is selected such that the normal force produces a stress less than the maximum compressive stress capability of the elastomer coating.
A wedge and socket termination device for a tension member having an elastomer coating, the wedge having a clamping surface includes a length, L, and an angle φ, the tension member having a tensile force, T, a width, W, and wherein the elastomer coating includes a maximum compressive stress capability, σc, and wherein the length, and angle are related in accordance with the formula:
- φ=tan−1(T/(σc*L*W).
Dependencies are inferred from the claim text.