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Патент USA US3087420

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April 30, 1963
Filed June 6, 1960
2 Sheets-Sheet 1
.n-l. '3 "
April 30, 1963
Filed June 6, 1960
2 Sheets-Sheet 2
FIG. 7
1 II]
I Ill
1 ll]
Patented Apr. 30, 1963
which abut at their ends and form a rectangular pas
sageway adapted to be connected with the terminal end
of the duct work of an air heating, cooling and/ or venti
lating system. The frame 1 is made into a rigid struc
Eugene F. Averill, Waterloo, Iowa, assignor to Titus Mau
ufacturing Corporation, Waterloo, Iowa, a corporation 5 ture by welding, soldering or brazing applied on the rear
3 087 410
Am msrnrsorrori nrlvicas AND GRILLES
of Iowa
face of the frame at the corners 10» and also on the cor
Filed June 6, 1960, Ser. No. 34,145
3 Claims. (Cl. 98-114)
This invention, in general, relates to grilles formed by
ners 11 of the rearwardly-extending segments 6-9.
Within the passageway formed by the segments 6-9 is
mounted a grille member made up of spaced bars or
sidewalk gratings, stair treads, shading louvers, protec
equal to the height of the opening of the passageway.
spaced ‘bars or vanes. The grilles of my invention may 10 vanes 12. These vanes are held in ?xed relation to each
other on hollow members having a length approximately
serve as, for example, architectural or ornamental grilles,
The hollow members are shown in the illustrated em
bodiment in the form of hollow tubes 13. These tubes
lets or the like. My invention also relates to- one special 15 extend through aligned holes in the bars or vanes 12 in
tive vbars at banking or other windows or openings, drain
grates, partitions, fences, grilles in various types of out
close ?tting relationship with said holes. A tight fric
adaptation of these grilles in air distribution outlets
utilizing a grille in the outlet opening.
Brie?y, my invention provides grilles in which the bars
tion fit between the bars or vanes 12 and the tubes 13
is achieved by distortinng at spaced points the outer sur
face of the hollow tubes 13 so as to form longitudinally
bers by a simpler method than the conventional tech- 20 extending ribs 14». At the places Where the ribs 14 are
‘formed, the outer surface of the tubular members 13 are
niques utilizing welding, spacer-washers, jam-?ts, etc. The
in tight frictional contact with the holes of the bars or
grilles of my invention can be manufactured as rigid units
vanes 12. The walls of the holes may also be slightly
by the simple techniques hereafter described. Brie?y, my
depressed, especially in the case of soft metals, such as
grilles are made up of spaced bars or vanes, usually in
or vanes are mounted on one or more supporting mem
approximately parallel orientation.
Fan-like or other 25
orientations, however, are alternate variations.
spaced bars or vanes contain one or more series of open
The grillwork is formed by placing the bars or vanes
12 in a jig and inserting the tubes 13 through aligned
holes predrilled in the bars or vanes 12. A mandrel
a hollow
having a plurality of spaced ribs of a radius slightly larger
After the hollow member is placed in the holes of 30 than the radius of the tubes is forced through the tubu
lar members in a longitudinal direction. This procedure
spaced bars or vanes, a mandrel having spaced ribs about
results in the formation of ?utes or grooves 17 at spaced
the periphery is forced through the hollow member in a
ings through which series of openings extends
manner so as to form spaced ?utes on the inside of the
hollow member. At the same time, this process causes
points in the inner walls of the tubes 13 and simul
taneously results in the formation of longitudinal ribs 14
or vanes to provide a tight, frictional ?t between the rib
pand tightly against the inner walls of the holes of the
the formation of small, longitudinal ribs on the outer 35 on the exterior Walls of the tubes. These ribs are minor
distortions in the cylindrical surface of the tube and
surface of the hollow member. These ribs are pressed
cause the outer walls of the tubular member 13 to ex
against the inside Walls of the holes in the spaced bars
portions and the inside walls of the holes. In this man 40 bars or vanes 12. The amount by which the outer walls
are thus expand-ed at spaced intervals is suf?cient to
ner, a grille unit can be formed with the hollow member
tightly hold the bars or vanes 12 on the tubular mem
or members serving as the supporting structure for the
bers 13. This gives a rigid assembly of spaced bars or
bars or vanes.
vanes mounted on the tubular supporting members 13.
The grillwork so formed may thereafter be mounted
-As a speci?c example of one relationship between the
in the frame of an air distributing device in accordance
with one aspect of the invention. Brie?y, these air dis- 45 mandrel and the tubular member 13, a tube having a
1A" internal diameter and 5/16" outside diameter is in
tributing devices comprise a frame adapted to ?t about
serted through holes in the bars or vanes 12 of slightly
an opening in the wall, ?oor or ceiling of a room. This
frame forms a passageway for air to pass therethrough.
The device has, contiguous to the front face of the frame
more than 5/16" diameter. The body of the mandrel is
(LOIS-0.016" smaller in diameter than the 14" internal
of the tube 13. The mandrel has ribs which are
and positioned within the passageway in the ‘framework, 50
0.028” larger than the 14” internal diameter.
a grille.
Thereafter, the grillwork thus formed is assembled in
My invention is described in more detail with reference
the frame 1 by driving four pins 15 through holes in
to speci?c, illustrative embodiments thereof. These spe
segments 6 and 7 into the four open en-ds of the two
ci?c embodiments are illustrated in the drawing, wherein‘:
5 tubes 13 with a tight, friction ?t between the pins and
FIG. 1 is a front elevational view of a rectangular air
tubes. The assembled sir distributing device is a rigid
distributing device;
structure whose parts are not subject to vibration by air
FIG. 2 is a rear elevational view of the same device;
FIG. 3 is a magni?ed view taken through a tubular
passing therethrough.
As an alternate method of manufacture, the frame in
supporting member on section 3—3 of FIG. 2;
which the grille is supported may be provided with holes
FIG. 4 is a cross-sectional view taken on section
of FIG. 2;
FIG. 5 is the top plan view of the air distributing
aligned with the holes of the spaced bars or vanes and
the hollow supporting members may extend through the
holes in the frame. Then the mandrel can be pushed
through the hollow member to cause it to expand at
FIG. 6 is aplan view of a grille; and
65 spaced points in the form of longitudinal ribs so that the
‘FIG. 7 is a plan view of another grille.
outer side of the hollow member expands against the in
The outlet of FIGS. 1-5 comprises a metal frame 1
side walls of the holes of the bars or vanes and also the
inside walls of the holes of the frame member itself.
of generally rectangular con?guration having horizontal
The invention is not limited to the foregoing embodi
trapezoidal front face plates 2, 3 and vertical, trapezoidal
front face plates 4, 5 making up a frame around the 70 ments. There are various modi?cations to which my
invention is equally applicable. For example, instead of
central air passage. Each of the segments 2-5 has a
a rectangular or square frame and corresponding opening,
rearwardly-extending rectangular part 6-9, respectively,
the frame may be circular, oval, triangular or other de
sired shape. Similarly, the passageway for the air formed
by the rearwardly-extending portions may be of the same
shape. It is further not required that the hollow mem
bers 13 be round. They may be hollow members hav
ing a ?attened tubular form, or they may be rectangular,
e.g., square, hollow members, triangular hollow members
through holes in said sides and being wedged into said
tube at each end thereof to hold said tube in said frame.
2. An air distribution grille comprising a rectangular
grille made up of a series of spaced, metal grille bars
extending parallel to each other the length of said grille
and de?ning therebetween parallel air passages through
said grille, said grille bars having near each end thereof
or oval hollow members. Also, especially in large grilles,
a cylindrical hole therein which is aligned with, and of
a reinforcing bar can be inserted into the hollow support
equal size to, the others of said holes in each respective
ing members after formation of the longitudinal ribs to 10 end of said bars to form a ?rst and second series of
give the supporting members additional rigidity. Also,
aligned holes through said bars, a ?rst, thin-walled tube
the bars or vanes 13 may have other shapes and may be
of an outer diameter slightly less than the diameters of
positioned at an angle with relation to the direction of air
said ?rst series of aligned holesextending through said
flow for de?ecting the air in a desired direction.
?rstseries of holes, a second tube of an outer diameter
The grille used in the outlet of FIGS. l-S is shown 15 slightly less than the diameters of said second series of
separately in FIG. 6. This grille also has other uses,
aligned holes extending through said second series of
e.g., as stair treads, protective grillwork for windows or
holes, the inside Wall of each of said tubes being ?uted
other openings, drain grates, etc. Shading louvers can
longitudinally with a plurality of circumferentially spaced
be made by placing the bars on the supporting members
grooves of small but su?icient magnitude to distort the
with the bars turned about their longitudinal axes, e.g., 20 outer surface of each tube into a plurality of cir
about 20-60° from the position shown in FIG. 6.
cumferentially spaced ribs which press against the cy
The grille of FIG. 7 is especially useful as sidewalk
lindrical walls of said cylindrical holes and ?xedly hold
grating or drain grating. It has a plurality of bars 19
said bars on said tubes, and a rectangular frame having
mounted on a single hollow supporting tube or mullion
a front face and rearw‘ardly-extending sides de?ning an
18 in the manner previously described. In this case, 25 air passage containing said grille, said rearw-ardly-extend
the ends of the bars 19 are free and in use are sup
ing sides having apertures therein aligned with the open
ported by the edges of the opening over which the grat
ends of said tubes, and a pin extending through each
ing is placed. The hollow member 18 contains a rein
aperture and wedged in the respective open end of said
forcing rod (not shown) which is inserted to give greater
tubes to ?xedly mount said grille in said frame.
strength to the tubular member. There are many other 30
3. -An .air distributing device comprising a frame hav
modi?cations of grilles made in accordance with the in
ing a front face and rearwardly extending sides de?ning
vention. To name a few, the bars or vanes may be sup
a passage, a grille in said passage including spaced, paral
ported on three or even more hollow supporting mem
here. The bars or vanes may be cut to give an outline
lel bars having-aligned holes, a tube extending through
said aligned holes, circumferentially-spaced longitudinal
for the grille which is oval, circular or other shape in 35 ribs on the outer surface of said tube, said ribs pressing
against the Walls of said holes to ?x the bars on said tube,
stead of the rectangular shapes of FIGS. 6 and 7. Many
and means engaging said frame and the ends of the tube
other modi?cations in shapes of the parts of the grilles
for ‘securing said grille to the frame.
or outlines of the grille units may be employed in the
practice of the spirit and scope of the invention herein
References Cited in the ?le of this patent
described and claimed.
The invention is hereby claimed as follows:
1. An air distributing device comprising a rectangular
Harnsberger __________ __ Aug._26, 1930.
frame having a front face and rearwardly-extending sides
Seward ______________ __ Aug. 23, 1932
Henney ______________ __ Aug. 13, 1940
de?ning a rectangular passage, a grille in said passage
including spaced, parallel bars having aligned holes, a
tube extending through said aligned holes, circumferen
tially-spaced, longitudinal ribs on the outer surface of
said tube, said ribs pressing against the walls of said
holes to ?x the bars on said tube, and pins extending 50
Freden ______________ .. Aug, 24, 1943
Alt _________________ __ Aug. 28, 1951
Great Britain __________ __ July 24, 1930
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