Liquid purification or separation – Flow – fluid pressure or material level – responsive – Check valve
Patent
1989-06-20
1991-03-05
Cintins, Ivars
Liquid purification or separation
Flow, fluid pressure or material level, responsive
Check valve
210184, 2104164, 210436, B01D 3518
Patent
active
049975552
ABSTRACT:
A fuel filter assembly for diesel fuel includes a filter head structure, spin-on replaceable element and threaded collection bowl. An annular heater housing is secured in the filter head for warming the fuel prior to passage through the filter medium with a pair of positive temperature coefficient heater discs providing the self-regulating heater function. A check valve is housed in the inlet chamber of the filter head in bypass connection with the filter medium to vent air from the chamber and to establish a return path for fuel from the filter. A restrictive orifice in the check valve limits fuel flow in the bypass path and an elastomeric duck-bill type valve provides the check valve function.
REFERENCES:
patent: 3674043 (1972-07-01), Norton
patent: 3710942 (1973-01-01), Rosenberg
patent: 4387691 (1983-06-01), Marcoux et al.
patent: 4406785 (1983-09-01), Siefer
patent: 4437986 (1984-03-01), Hutchins et al.
patent: 4501255 (1985-02-01), Van Der Ploeg et al.
patent: 4502955 (1985-03-01), Schaupp
patent: 4585924 (1986-04-01), Pakula
patent: 4596224 (1986-06-01), Prager
patent: 4608161 (1986-08-01), Niemeier
Brooks Darwin L.
Church John F.
Popoff Peter
Stone Walter H.
Wynne Ken N.
Cintins Ivars
Parker Hannifin Corporation
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