Geometrical instruments – Area integrators – Electrical
Patent
1979-09-18
1981-07-07
Goldberg, Gerald
Geometrical instruments
Area integrators
Electrical
G01F 2304
Patent
active
042766940
ABSTRACT:
A dipstick assembly including a handle member having a passageway extending therethrough between the ends thereof, a measuring blade connected to the handle member and a cap member also having a passageway extending therethrough between the ends thereof and connected to the handle member in such a way as to allow ventilation of a sealed chamber when the dipstick assembly is disposed in an access passageway to the chamber. The cap member includes a sealing device for perfecting the seal between the dipstick assembly and the access passageway. Auxiliary venting ports allow ventilation of excess gases from the access passageway and the sealed chamber in the event that the open end of the passageway in the cap member is below the fluid level of the chamber.
REFERENCES:
patent: 3991476 (1976-11-01), Haines
patent: 4067113 (1978-01-01), Haines
Corr Denis E.
Goldberg Gerald
Van Products Company
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