Single turn potentiometer with direct rotor-to-housing seal

Details Single turn potentiometer with direct rotor-to-housing seal Single turn potentiometer with direct rotor-to-housing seal

1990-01-24

1991-10-22

Lateef, Marvin M.

Electrical resistors

Mechanically variable

Movable contact electrically adjustable over length of...

338174, H01C 1032

Patent

active

050599402

ABSTRACT:
In a miniature, single-turn potentiometer, a fluid-tight seal is formed between the rotor and the housing by the interference fit between an annular ridge on the peripheral edge of the rotor and a conforming groove in the interior wall surface of the housing cavity in which the rotor is installed. In a preferred embodiment of the invention, there are two parallel ridges and grooves, and they are configured to form a "chevron" seal, in which the ridges have a substantially saw-tooth shape in axial cross-section, with the grooves having a complementary shape. The chevron seal provides a direct, rotor-to-housing seal that is fluid-tight, without the use of an O-ring, while also restraining the rotor from axial movement with respect to the housing.

REFERENCES:
patent: 3488618 (1970-01-01), Yungblut et al.
patent: 3518604 (1970-06-01), Beaver et al.
patent: 3531860 (1970-10-01), Paine et al.
patent: 4110722 (1978-08-01), Brendle et al.
patent: 4626823 (1986-12-01), Smith

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