Heat exchange – With alarm – indicator – signal – register – recorder – test or...
Reexamination Certificate
2003-11-03
2008-03-11
Ford, John K. (Department: 3744)
Heat exchange
With alarm, indicator, signal, register, recorder, test or...
C137S551000, C073S198000, C073S273000, C073S866500, C374S147000, C251S318000, C251S319000
Reexamination Certificate
active
07341097
ABSTRACT:
A coolant sensor doubles as a bleed valve for purging trapped air from a cooling system. The sensor slides into a port placing a sensor element in contact with the coolant. The sensor includes a pair of encircling o-rings for sealing the system from atmosphere in one position and permitting bleeding in a second position. The bleed channel is in the sensor port between the o-rings. The sensor is moved so the innermost o-ring clears the narrow opening into the cooling system. The outermost o-ring maintains a seal to keep the coolant from leaking out of the sensor port. The sensor is held in either position by a horseshoe clip or by a bayonet arrangement, the horseshoe clip arrangement including multiple apertures for each position, the bayonet having a position to provide for safe bleeding of air from the cooling system without completely removing the sensor from its retention port.
REFERENCES:
patent: 899201 (1908-09-01), Braybrook
patent: 3007340 (1961-11-01), Kraftson
patent: 3691846 (1972-09-01), Ingold
patent: 3718157 (1973-02-01), Siebentritt et al.
patent: 5829880 (1998-11-01), Diedrich
patent: 5853071 (1998-12-01), Robinson
patent: 6772652 (2004-08-01), Cronimus
Chrysler LLC
Ford John K.
Zelikov Alexander
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