Through-wall bushing

Details Through-wall bushing Through-wall bushing

1998-11-12

1999-11-16

Mah, Chuck Y.

Miscellaneous hardware (e.g., bushing, carpet fastener, caster,

Bushing

411311, F16L 500, H02G 322

Patent

active

059834501

ABSTRACT:
A through-wall bushing defines a protected passage through a wall or similar structure, and includes a first member having an axially extending threaded portion. A second ring member is threaded onto the first member and clamps the wall structure between opposing flanges of the first member and second ring member. At least one friction inducing locking mechanism is configured on at least one of the threaded surfaces of either the first or second member, or both members. This friction inducing locking mechanism has a configuration that increases the degree of torque required to tighten and loosen the respective members upon the threads engaging the locking mechanism. The locking mechanism has a shape so that, once engaged with opposite threads, the torque required to loosen the members is greater than the torque required to further tighten the members.

REFERENCES:
patent: 663049 (1900-12-01), Staiger
patent: 2741288 (1956-04-01), Johnson
patent: 2788045 (1957-04-01), Rosan
patent: 3176746 (1965-04-01), Walton
patent: 4475858 (1984-10-01), Benjamin et al.
patent: 4896391 (1990-01-01), Rowley

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