Sealing element for encapsulated measuring device

Details Sealing element for encapsulated measuring device Sealing element for encapsulated measuring device

1983-04-21

1985-01-01

Little, Willis

Geometrical instruments

Area integrators

Electrical

33125A, 33125T, 277215, G01B 1102

Patent

active

044909152

ABSTRACT:
An improvement is disclosed for an encapsulated measuring device used for measuring the relative position of two objects. The improvement comprises a pair of sealing lips, each secured at one edge to a housing for the measuring device, and together covering an opening in the housing. The lips each define regions of greater flexibility adjacent to regions of lesser flexibility. A follower passes through the opening between the sealing lips. The sealing lips operate to maintain a seal for the opening while permitting the follower to pass between them. The lips are constructed such that openings adjacent to the follower are minimized or eliminated, and little frictional force is exerted on the follower if it moves in the opening along a measuring direction. The result is that accurate measurement is possible while intrusion of debris into the housing is largely prevented due to the seal.

REFERENCES:
patent: 3183009 (1965-05-01), Kunel
patent: 4057258 (1977-11-01), Ernst et al.
patent: 4170826 (1979-10-01), Holstein
patent: 4170828 (1979-10-01), Ernst
patent: 4262423 (1981-04-01), Affa

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