Hermetic fuel level sender having tank bottom referencing

Details Hermetic fuel level sender having tank bottom referencing Hermetic fuel level sender having tank bottom referencing

2006-01-31

2006-01-31

Williams, Hezron (Department: 2856)

Measuring and testing

Liquid level or depth gauge

Float

C073S313000, C073S305000

Reexamination Certificate

active

06990862

ABSTRACT:
A fuel level sender (26) for signaling liquid fuel level in a fuel tank (22). An enclosure (31) forming a hub of the sender provides an interior that is hermetically sealed against intrusion of fuel vapor and liquid. An actuator (110, 122) is positionable on the enclosure exterior in correlation with liquid fuel level. A movement (52) within the enclosure interior follows the positioning of the actuator. An electric circuit element (62; 86) within the enclosure interior is operated by the movement to provide an electric characteristic for transmission through the enclosure to signal liquid fuel level. A bottom reference rod (150) and stop (152) position the enclosure circumferentially within its mounting in a fuel pump module to cause the circuit element to signal zero fuel level when the stop is on the tank bottom wall and the actuator is in position corresponding to zero fuel level in the tank.

REFERENCES:
patent: 3449955 (1969-06-01), Stadelmann
patent: 3731805 (1973-05-01), Schniers
patent: 3925747 (1975-12-01), Woodward et al.
patent: 4627283 (1986-12-01), Nishida et al.
patent: 4939932 (1990-07-01), Ritzenthaler et al.
patent: 5085078 (1992-02-01), Baux et al.
patent: 5284055 (1994-02-01), Baux et al.
patent: 5666851 (1997-09-01), Bacon
patent: 6230690 (2001-05-01), Umetsu
patent: 6508121 (2003-01-01), Eck
NTSB Abstract AAR-00/03: Abstract of the Aircraft Accident Report of TWA Flight 800.

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