Spacer for concentric tubes

Details Spacer for concentric tubes Spacer for concentric tubes

1976-07-02

1978-10-24

Stearns, Richard R.

Pipes and tubular conduits

Plural duct

Coaxial

138148, 138149, F16L 918, F16L 1112, F16L 5914

Patent

active

041216237

ABSTRACT:
The spacer is helically wound on the inner one of two concentric tubes, and is constructed from plural elongated, generally flat members of different cross-section and profile for surface contours permitting only limited contact between adjacent members. Alternation between convex and concave surfaces prevents lateral shifting of the members off each other.

REFERENCES:
patent: 319738 (1885-06-01), McKinney
patent: 3473575 (1969-10-01), Vogelsang et al.
patent: 3592238 (1971-07-01), Scheffler et al.
patent: 3595275 (1971-07-01), Steans et al.
patent: 3670772 (1972-06-01), Ziemek et al.

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