PORTABLE OVEN

FOUR PORTATIF

English Abstract

A wood burning oven comprising a platform
having a generally rectangular outline which includes a
metal tray with refractory material contained in the
tray forming the floor of the oven, a metal enclosure
supported on the tray, the enclosure having a
semi-cylindrical wall with the axis of the cylinder at right
angle to the longitudinal axis of the rectangle, the
semi-circular wall forming the cover of the oven, front
and rear walls completing the enclosure. An opening is
provided in the front wall of the enclosure. and an
inlet/outlet tunnel extending outwardly from the front
wall is coincident with the opening of the front wall.
An exhaust duct extends upwardly from the top of the
inlet/outlet tunnel wall, whereby a wood-burning fire
when activated in the oven towards a longitudinal end
of the oven causes heat by means of the combustion
gases circulating by convection along the contour of
the cover of the oven and passing through the opening
to exhaust through the exhaust duct.

Claims

The embodiments of the invention in which an
exclusive property or privilege is claimed are defined
as follows:
1. A wood burning oven comprising a platform
having a generally rectangular outline which includes a
metal tray with refractory material contained in the
tray forming the floor of the oven, a metal enclosure
supported on the tray, the enclosure having a
semi-cylindrical wall with the axis of the cylinder at right
angle to the longitudinal axis of the rectangle, the
semi-circular wall forming the cover of the oven, front
and rear walls completing the enclosure; an opening
provided in the front wall of the enclosure and an
inlet/outlet tunnel extending outwardly from the front
wall and coincident with the opening of the front wall,
an exhaust duct extending upwardly from the top of the
inlet/outlet tunnel wall, whereby a wood-burning fire
when activated in the oven towards a longitudinal end
of the oven causes heat by means of the combustion
gases circulating by convection along the contour of
the cover of the oven and passing through the opening
to exhaust through the exhaust duct.
2. A knock-down kit for a portable oven
comprising a carriage with runners thereon, means on
the carriage adapted to receive a platform comprising a
rectangular metal panel, refractory bricks adapted to
be set on the panel, and an enclosure mounted to the
platform whereby the enclosure includes a metal,
semi-cylindrical cover with front and rear metal walls, an
inlet/outlet tunnel enclosure adapted to be mounted to
the front wall surrounding an opening in the front
wall, and an exhaust duct adapted to be mounted to the
top of the inlet/outlet tunnel wall.

Description

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"PORTABLE OVEN"
The present invention related to a portable
oven and more particularly to a wood-burning pizza
oven.
Many restaurants that have had pizza-baking
facilities adapted for the more traditional wood-fire
ovens as opposed to modern day electrical ovens.
Connoisseurs will state that a pizza baked in a wood-
burning oven has a better flavor, possibly from the
charcoal, and is more evenly baked.
However conventional wood-burning ovens for
baking pizzas are stationary facilities, generally
build of masonry with refractory bricks forming the
interior walls of the oven. There is a need for a port-
able wood-burning oven for baking pizzas that can be
installed in smaller restaurants or for outdoor events.
It is an aim of the present invention to
provide a wood-burning oven which is portable.
It is a further aim of the present invention
to provide a wood-burning oven for baking pizzas which
can be easily assembled at a designated indoor or out
door site.
A construction in accordance with the
present invention includes a platform comprising a
generally rectangular metal tray with refractory
material contained in the tray forming the floor of the
oven, a metal enclosure supported on the tray, the
metal enclosure having a semi-cylindrical wall forming
the cover with front and rear walls completing the
enclosure. An opening is provided in the front wall and
an inlet/outlet tunnel extends outwardly from the front
wall and is coincident with the opening in the front
wall. An exhaust duct extends upwardly from the top of
the inlet/outlet tunnel wall.
In a more specific embodiment of the present
invention the portable oven is a knock-down kit
comprising a carriage provided with caster wheels,

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means on the carriage for mounting a platform consist-
ing of a rectangular metal tray, refractory bricks
adapted to be set in the tray, and an enclosure to be
fitted on the platform, whereby the enclosure includes
a metal semi-cylindrical cover with front and rear
metal walls; an inlet/outlet tunnel enclosure adapted
to be mounted to the front wall surrounding an opening
in the front wall, and an exhaust duct adapted to be
mounted to the top of the inlet/outlet tunnel wall.
Having thus generally described the nature
of the invention, reference will now be made to the
accompanying drawings, showing by way of illustration,
a preferred embodiment thereof, and in which:
Fig. 1 is a fragmentary perspective view of
an embodiment of the present invention;
Fig. 2 is a perspective view taken from a
different angle of the embodiment shown in Fig. 1;
Fig. 3 is a perspective view of the knock
down element making up the portable oven kit in accor
dance with the embodiment of Fig. 1;
Fig. 4 is a perspective view of one of the
know-down elements of the kit;
Fig. 5 is a perspective view similar to
Fig. 4 but showing another knock-down element assembled
to the knock-down element shown in Fig. 4; and
Fig. 6 is a perspective view of a partially
assembled oven.
The portable pizza oven 10 shown in Figs. 1
and 2 includes a carriage 12 to which is mounted a
platform 14. A hooded enclosure 16 sits on the
platform 14 while an inlet/outlet tunnel 18 extends
forwardly of the enclosure 16. An exhaust duct 20 is
mounted to the top of the inlet/outlet tunnel 42.
As shown in Figs. 2, 4 and 5, the carriage
12 includes a light weight metal frame 22 made of
steel. The frame 22 includes posts 27 at each corner of

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a rectangular shelf 26. Caster wheels 24 are mounted at
the bottom of each post 27.
The posts 27 are adapted to support and
mount the platform 14 which comprises a shallow
tray 28. The tray 28 is rectangular and each post 27
coincides with a respective bottom corner of the tray
28. Refractory bricks 30 are placed in the tray 28 to
form the floor of the oven.
The oven enclosure 16 includes a cover made
up of a semi-cylindrical sheet metal wall 32 as best
seen in Figs. 1, 3 and 6. A flat sheet metal rear wall
34 and a sheet metal front wall 36 completes the enclo
sure 16. The enclosure 16 is preferably made of steel
which has been treated to resist high temperature. The
front wall 36 is provided with an opening 31.
An inlet/outlet tunnel 18 includes a wall
portion made up of flat side walls 40 and a top semi-
cylindrical wall 42. The rear edges of the walls 40 and
42 coincide with the periphery of the opening 31 on the
front wall 36. A short upper wall segment 38 extends
downwardly from the forward edge of the top wall 42 on
the tunnel 18.
The inlet/outlet tunnel 18 is also provided
with a platform wall 44 which extends forwardly of the
platform 14 forming a hearth. The inlet/outlet tunnel
18 and the platform wall 44 can be mounted to the
platform 14 by means of mounting brackets 29 as seen in
Fig. 5. A utility bracket 46 may be provided under the
platform 44 in order to accommodate utensils such as a
pizza paddle. The pizzas are inserted into the oven
through the tunnel 18 and opening 31.
The duct 20 is fitted to the top of the wall
42 of the inlet/outlet tunnel 18, and preferably
extends to a level to avoid smoke getting into the
faces of the oven operator or other persons standing
around the oven. The total overall vertical dimension
of the pizza oven 10 of the present embodiment, includ-

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ing the extent of the exhaust duct 20 would be approxi-
mately 14 feet. The radius of the semi-cylindrical wall
is ------ . The area of opening 31 is ----- .
The shape of the enclosure 16 is considered
important to the proper operation of the oven as is the
proportional size thereof compared to the opening 31
and the inlet/outlet tunnel 18.
In operation, a small stack of fire wood is
inserted within the enclosure 16, either towards the
left or the right of the opening 31. The wood is then
ignited and allowed to heat up the oven. A pizza to be
baked is then inserted into the oven by means of a
paddle to sit on the refractory bricks 30 making up the
floor of the oven. The top surface of the pizza is
heated from the top by convection as the hot combustion
gases circulate within the oven following the contour
of the semi-cylindrical cover 32. The hot gases are
then exhausted through the opening 31 and then through
the duct 20. The circulation causes the hot gases to
contact the top of the pizza to bake it by convection.
At the same time, the refractory brick floor acts as a
heat sink and heats the bottom of the pizza by direct
radial contact with the bottom surface of pizza.
A feature of the oven is that it is a knock-
down oven and, as shown in the drawings, the various
knock-down elements include the carriage 12, the tray
28 and the refractory bricks 30 making up the platform
14. The enclosure 16, the inlet/outlet tunnel 18 and
the exhaust duct 20, all of which are separate elements
which can be transported to a site to be assembled.
Once the oven has been assembled, it can be
moved within a reasonable radius by way of the carriage
12 with caster wheels 24.