US 2017/0304749 A1 · FUEL FILTER DEVICE

Abstract

A fuel filter device includes a bag-shaped filter member filtering fuel that is drawn into a fuel pump, an inner frame member retaining the filter member in an expanded state, and a mounting member connected to the inner frame member and serving to communicate an internal space of the filter member with an outside. A valve chamber is defined by the inner frame member and the mounting member, and a check valve serving to prevent backflow of fuel is disposed in the valve chamber. The check valve includes a flat-plate shaped valve body having elasticity. The check valve opens against its weight when the fuel pump is operated, and the check valve closes due to its weight when the operation of the fuel pump is stopped.

Claims10

Dependent claims

A fuel filter device comprising:

a bag-shaped filter member for filtering fuel that is drawn into a fuel pump;
an inner frame member for retaining the filter member in an expanded state;
and
a pipe member connected to the inner frame member and serving to communicate an internal space of the filter member with an outside;
wherein a valve chamber is defined by the inner frame member and the pipe member, and a check valve serving to prevent backflow of fuel is disposed in the valve chamber.

2 more elements

A fuel filter device comprising:

a bag-shaped filter member for filtering fuel that is drawn into a fuel pump;
an inner frame member for retaining the filter member in an expanded state, wherein the inner frame member forms an annular valve seat, wherein the inner frame member also comprises an elevated cylindrical flange extending radially outward from the annular valve seat in a one-piece construction with the inner frame member, and wherein the inner frame member also comprises a circular fitting groove located radially outward from and adjacent to the cylindrical flange;
a pipe member comprising a two-tiered cylindrical shape with top and bottom tiers, with the bottom tier extending radially outward from and at approximately 90 degrees relative to the top tier, wherein the pipe member is connectable to the inner frame member via inserting a fitting flange into the circular fitting groove of the inner frame member forming a complementary fit between the pipe member and the inner frame member, wherein the top tier of said pipe member further comprises a concentric guide tube within its interior and serves as a conduit for communication between an internal space of the filter member and an outside region through a hole formed in the top tier of the pipe member;
wherein a valve chamber is jointly defined by the cylindrical flange of the inner frame member and the pipe member which fits radially over top of the cylindrical flange;
and
a check valve configured to prevent backflow of fuel and disposed in the valve chamber.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

15/523,556Filed 10 Sep 2015

Priority

JP 2014-2269037 Nov 2014

Published

26 Oct 2017

Term ends

Not estimatedThe source records don’t support an estimate.

Classification21 codes

F02M 37/50
Characterised by filters or filter arrangements: filters arranged in or on fuel tanks
B01D 27/06
With cartridges made of a piece of unitary material, e.g. filter paper: with corrugated, folded or wound material
B01D 27/08
Cartridge filters of the throw-away type: construction of the casing
B01D 35/0273
Rigidly mounted in or on tanks or reservoirs: filtering elements with a horizontal or inclined rotation or symmetry axis submerged in tanks or…

Fuel filter device

Life of this patent

Fuel filter device

Life of this patent

Abstract

Claims10