Molded control knob

Details Molded control knob Molded control knob

1975-01-09

1976-06-29

Kundrat, Andrew V.

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

Sash balances

Spring

403361, F16D 106

Patent

active

039655296

ABSTRACT:
A unitarily molded control knob for an irregularly shaped rotatable shaft, such as a D-shaft. The knob has a molded flat floor which engages the flat of the D-shaft, and two opposed arcuately concave side walls which engage the opposite arcuately convex sides of the D-shaft adjacent the flat. A resiliently flexible cantilever arm is spaced opposite from the flat floor and biases the shaft tightly against the flat floor as the shaft is inserted axially therebetween. A major length of the underside of the cantilever arm is arcuately concave to mate with the area of the D-shaft opposite the flat and terminates in a flat area on the free end of the cantilever arm to distribute the pressure on the D-shaft and to develop a more positive gripping action with better holding capabilities.

REFERENCES:
patent: 2252855 (1941-08-01), Lasch
patent: 3386127 (1968-06-01), Hitzeroth et al.
patent: 3415472 (1968-12-01), Vodinh
patent: 3679252 (1972-07-01), Howie

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