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US 5,203,994 AGranted
Fuel filter retention system
AssigneeStanadyne Automotive Corp.
InventorLeon P. Janik
Life of this patent
Estimating the term…
Abstract
A fuel filter assembly employs a retainer collar for locking the disposable cartridge to the base. The base and the retainer collar are configured with a pair complementary spiral ramp-like structures. The retainer collar is rotatable so that the catches are positioned in slots of the base for locking the cartridge to the base. A spring washer biases the retainer collar into the locked position.
Claims22
A fuel filter assembly comprising:
- base means comprising a receptacle and ramp means for defining a first spiral ramp at the exterior of said enclosure and a stop angularly spaced from said first ramp and defining a slot therebetween;
- disposable cartridge means mountable to said base means, at least a portion of said cartridge means being receivable in said receptacle, said cartridge means housing a filter element and comprising a peripheral engagement shoulder;
- biasing means for generally axially biasing said cartridge means away from said base means receptacle;
- retainer collar means comprising a retainer portion engageable against said shoulder and follower means comprising a catch at one end thereof, said follower means being engageable with said ramp means so that as said collar means is angularly rotated, said follower means rides said ramp means and said catch moves into said slot under the bias of said biasing means for capture thereby to lock said cartridge means to said base means.
1 more element
A fuel filter assembly comprising:
- base means comprising receiving means defining a receiving cavity and ramp means for forming a first ramp at the exterior of said receiving means and a stop angularly spaced from said first ramp and defining a slot therebetween;
- disposable filter cartridge means mountable to said base means, at least a portion of said cartridge means being receivable in said cavity, said cartridge means housing a filter element and comprising a peripheral first shoulder;
- spring means engageable with said base means and said cartridge means for axially biasing said cartridge means away from said base means;
- and
- retainer collar means comprising a second shoulder engageable against said first shoulder and an interiorly disposed follower terminating in a catch, said catch being slidably engageable against said first ramp as said collar is angularly rotated so that said catch rides said first ramp and said catch positively moves into said slot under the bias force of said spring means to releasably lock said cartridge means to said base means with said follower resting on said first ramp.
2 more elements
A fuel filter assembly comprising:
- base means defining a receiving structure and ramp means at the exterior of said structure for forming a first spiral ramp terminating in a first end;
- disposable cartridge means mountable to said base means for housing a filter element, at least a portion of said cartridge means being receivable in said structure, said cartridge means housing a filter element and comprising a peripheral first shoulder;
- biasing means for axially biasing said cartridge means from said base means when said cartridge means is mounted to said base means;
- and
- retainer collar means comprising a second shoulder engageable against said first shoulder and an interior follower terminating in a catch, said catch being slidably engageable against said first spiral ramp as said collar is angularly rotated so that said interior follower rides said first spiral ramp and said catch slides by said first end to thereby releasably lock said cartridge means to said base means.
2 more elements
Dependencies are inferred from the claim text.