Variable length dipstick

Details Variable length dipstick Variable length dipstick

1991-09-09

1992-03-10

Haroian, Harry N.

Geometrical instruments

Distance measuring

Sounding type

G01F 2304

Patent

active

050940082

ABSTRACT:
A variable length dipstick provides fluid level indications by contacting a stop within the sump. The dipstick is removably disposed within a guide tube. The dipstick has an upper element with a handle and a seal which contact the guide tube on insertion of the dipstick into the guide tube. A lower element is slidably engaged with the upper element. The lower element has marks to indicate the appropriate fill level. A spring is functionally disposed between the upper element and the lower element, tending to keep the dipstick extended to its full length. The resultant dipstick spring load produced by insertion and sealing of the dipstick is sufficiently low so as not to overcome the seal between the seal and the guide tube.

REFERENCES:
patent: 1981270 (1934-11-01), Hollingsworth
patent: 2254662 (1941-09-01), Naples et al.
patent: 2738587 (1956-03-01), Nelson
patent: 2849796 (1958-09-01), Eshbaugh
patent: 3274691 (1966-09-01), Bolles

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