U.S. patent number 3,759,017 [Application Number 05/191,942] was granted by the patent office on 1973-09-18 for latch for a filter apparatus.
This patent grant is currently assigned to American Air Filter Company, Inc.. Invention is credited to George W. Young.
United States Patent |
3,759,017 |
Young |
September 18, 1973 |
LATCH FOR A FILTER APPARATUS
Abstract
A filter apparatus having a removable door or panel member and a
latch member pivotally mounted to a filter housing which is
adaptable for engagement with the removable door member, the latch
member including a base portion pivotally attached to the housing
and arm portions extending generally at right angles to the base
portion and being adaptable for engaging relationship with the
door.
Inventors: |
Young; George W. (Fern Creek,
KY) |
Assignee: |
American Air Filter Company,
Inc. (Louisville, KY)
|
Family
ID: |
22707554 |
Appl.
No.: |
05/191,942 |
Filed: |
October 22, 1971 |
Current U.S.
Class: |
55/481;
55/493 |
Current CPC
Class: |
B01D
46/00 (20130101) |
Current International
Class: |
B01D
46/00 (20060101); B01d 027/08 () |
Field of
Search: |
;55/481,490,493,503,507,509 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Nozick; Bernard
Claims
What is claimed is:
1. A filter apparatus comprising a filter cell support housing
having first and second flow-through apertures disposed therein,
said housing being adapted to receive flow-through filter media,
said media being positioned in alignment with and disposed between
said first and second flow-through apertures, said housing having
an access opening therein; said access opening having panel
receiving means along one end thereof; a removable panel member
positioned in sealing relationship with said access opening and
held by said receiving means; and a latch means mounted on said
housing for latching said removable panel member into said access
opening, said latch means including a latch member having a base
portion pivotally mounted to said housing and arm portions
extending generally at right angles to said base portion, said arm
portions including means thereon for engaging with latch receiving
means on said panel member to secure said panel member to said
panel receiving means.
2. The filter apparatus of claim 1, said latch member being
U-shaped.
3. The filter apparatus of claim 1, said access opening of said
housing being defined by an offset flange portion of Z-shaped
cross-section, said flange portion adapted to receive said panel
member.
4. The filter apparatus of claim 1, said arm portions having
outwardly extending nesting tabs at their extremity, said tabs
adapted to engage with said removable door.
5. The filter apparatus of claim 1, said removable panel member
having a peripheral channel of U-shaped cross-section extending
from the surface of said panel member adaptable for engaging with
said arm portions.
6. The filter apparatus of claim 5, said U-shaped portion having
first and second lips extending along opposing sides of the
periphery of said panel member and a third lip extending along one
end of said panel member generally at right angles to said first
and said second lips and communicating therewith.
7. The filter apparatus of claim 6, said arm portions having
outwardly extending interlock tabs at their extremity, said tabs
adapted to engage with said first and said second lips.
Description
BACKGROUND OF THE INVENTION
This invention relates to air filters. In one aspect it relates to
a filter of the replacable type. In another aspect the invention
relates to a latch for latching a removable door to a housing
containing a replacable type filter.
In air filtration systems which are installed in office buildings,
industrial plants, and the like, replacable type filters have been
utilized. These filters are generally in a housing or air duct with
door or panel means being utilized as the means for entering the
housing or air duct for replacing the filters when they become
clogged. Many different latches have been utilized for latching and
unlatching these panels from the panel frames in the housings but
none have been found to be inexpensive, sturdy, easy and quickly
operable, while providing a fluid tight seal between the panel
frame and the panel which is removably attached.
SUMMARY OF THE INVENTION
In the present invention, it is recognized that it is desirable to
provide a latch for a filter housing which is inexpensive, but yet
in combination with a door or panel member provides for a fluid
tight seal in an air filtering system. Furthermore, it is
recognized that it is desirable to provide a latch for a filter
apparatus which is easily constructed, and easy and quickly
operable.
The present invention advantageously provides a straightforward
arrangement for a latch for a filter housing which may be utilized
with filters of the replacable type. The present invention further
provides a filter apparatus including a latch that is inexpensive,
sturdy, easy and quickly operable, and yet in combination with the
door or panel member provides a fluid tight seal.
Various other features of the present invention will become obvious
to those skilled in the art upon reading the disclosure set forth
hereinafter.
More particularly, the present invention provides a filter
apparatus comprising a filter cell support housing having first and
second flow-through apertures disposed therein, the housing being
adapted to receive flow-through filter media, the media being
positioned in alignment with and disposed between the first and
second flow-through apertures, the housing having an access opening
therein; a removable panel member adaptable for sealing
relationship with the access opening; and a latch means mounted on
the housing for latching the removable panel member over the access
opening, the latch means including a latch member having a base
portion pivotally mounted to the housing and arm portions extending
generally at right angles to the base portion and adaptable for
engagement with the panel member.
It is to be understood that the description of the examples of the
present invention given hereinafter are not by way of limitation
and various modifications within the scope of the present invention
will occur to those skilled in the art upon reading the disclosure
set forth hereinafter .
Referring to the drawings:
FIG. 1 is a perspective view, partially cutaway, of a filter
apparatus of the pesent invention;
FIG. 2 is an enlarged cross-sectional view taken in a plane passing
through line 2--2 of FIG. 1;
FIG. 3 is a perspective view looking toward the underside of a
filter apparatus of FIG. 1.
FIG. 1 of the drawings illustrates a structure of a filter
apparatus of the present invention. The filter apparatus of the
present invention includes housing 1 having a first flow-through
aperture 5 (FIG. 3) and a second flow-through aperture 11 therein
with the filter assembly 6 including filter media 30 disposed
within housing 1 in flow-through alignment with apertures 5 and
aperture 11. The filter apparatus further includes removable door
or panel member 3 adapted to cover an access opening (not shown) in
housing 1 with latch means being provided for latching removable
panel member 3 fluid tight over the opening (not shown) in housing
1.
One latch means of the present invention includes a U-shaped
latchmember 4 which can be formed from a suitable flexible metallic
rod stock. Latch member 4 includes a base portion 22 pivotally
attached to the housing 1 by mounting brackets 21 and arm portions
or members 23 having outwardly turned tabs 24 at their extremities.
It is to be noted that the tabs 24 are adaptable for engagement
with panel member 3 in a manner described hereinafter. The arm
members 23 extend generally at right angles to base portion 22 and
are flexible for movement relative the axis of base portion 22.
Panel member 3 includes a fixedly attached centrally disposed
handle 7, the panel being turned along its periphery to provide a
periphery channel of U-shaped cross section 8 adapted to receive
the interlocking tabs 24 in nesting engagement therewith.
FIG. 2 is an enlarged cross-sectional view of the filter apparatus
of FIG. 1 illustrating the sealing relationship between the panel
member 3 and the housing 1. The access opening in housing 1 is
determined by an offset flange portion 10 of Z-shaped cross-section
which is adaptable for receiving panel member 3 in seated
engagement therewith with gasket or sealant 9 bonded to the flange
portion 10 providing a fluid tight seal between panel member 3 and
the flange portion 10. The U-shaped portion 8 of panel member 3
includes lips or flanges 25 extending along opposing sides of the
periphery of the panel member 3, lips 25 being adaptable for
receiving in engagement against the inside faces thereof the
nesting tabs 24. U-shaped portion 8 further includes lip or flange
26 extending along one end of the panel member 3 generally at right
angles to lips 25 and communicating therewith. Arm members 23, in
engaging position, are in contact with and extend over the outside
face of the lip 26.
In the operation of the latch of the present invention, panel
member 3 is placed in sealing relationship with flange portion 10
of housing 1 and the flexible arm members 23 of the pivotally
attached latch member 4 are brought in contact with the outwardly
extending lip 26 of U-shaped portion 8. Arm members 23 are adapted
to extend over the edge of the lip 26 and within the lips 25, the
interlocking tabs 24 of arm members 23 engaging against the inner
faces of lips 25. The pressure exerted by the outer face of lip 26
on arm member 23 forces the interlocking tabs 24 against the inner
face of lips 25 thereby holding the panel member 3 securely in
position.
It will be realized that various changes may be made to the
specific embodiment shown and described without departing from the
principles of the present invention.
* * * * *