Ventilation register

To avoid or at least substantially reduce heat losses occurring with conventional registers ventilation, a register is disclosed which is assembled of two basic bodies supporting each a shutter and connected to each other through a thermally insulating layer. Preferably, the thermally insulating layer comprises insulating sectional strips and it is satisfactory to provide such strips only along the upper and lower longitudinal edges of the two basic bodies. The two shutters are coupled to each other so that they can be shifted conjointly from their closing to their open position and vice versa by means of a single drive mechanism.

FIELD AND BACKGROUND OF THE INVENTION 
The present invention relates to a new and useful ventilation register. 
Registers are usually made up of a basic body and a shutter mounted 
thereon, with both the basic body and the shutter being provided with a 
plurality of ventilation apertures which are juxtaposed in the 
displacement direction of the shutter and, as a rule, are of equal size, 
with cover lands extending therebetween. In one end position of the 
shutter, the lands of the basic body are aligned with the ventilation 
apertures so that no air can pass therethrough. In the other end position 
of the shutter, the ventilation apertures of the basic body are aligned 
with rows of apertures of the shutter, so that a maximum passage area is 
open for the air. In intermediate positions of the shutter, the 
ventilating effect is correspondingly smaller. 
Prior art ventilation registers are made, as a rule, of aluminum, with 
preferably suitable aluminum sections being employed for both the basic 
body and the shutter. The back and forth movement of the shutter is 
effected by means of a drive mechanism which is secured to the basic body 
and, preferably, engages by its drive member into at least one of the 
ventilation apertures of the shutter. 
As is well known, aluminum is a good heat conductor. Therefore, ventilation 
registers of this kind cause appreciable losses of heat even when closed 
to air flow. 
SUMMARY OF THE INVENTION 
The invention is directed to a ventilation register in which such heat 
losses are substantially reduced. 
To this end and in accordance with the invention, a ventilation register is 
provided comprising two basic bodies which are connected to each other 
through an insulating layer and each supporting a ventilating shutter. Due 
to this insulating layer, the cold bridge of prior art ventilation 
registers is avoided. Therefore, the heat losses in the inventive register 
are substantially reduced. In addition, with the ventilation closed, an 
air cushion or dead air space is formed between the two basic bodies or 
between the shutters if they are inside, which further suppresses the heat 
exchange between the warmer inner space and the colder air outside. 
Further, a draft development observed in prior art ventilation registers, 
is at least largely eliminated in the inventive register, due to the 
mentioned air cushion. In view of these advantages and, particularly, also 
the involved high expenditures of energy, the somewhat higher costs of 
manufacturing the inventive register recede into the background. 
In a particularly preferred embodiment of the invention, the ventilation 
shutters are coupled to each other and displaceable simultaneously and in 
the same direction so that both shutters come into the completely closed 
or completely open position at the same time. The same, of course, applies 
to any intermediate position. 
A development of the invention provides that the insulating layer has the 
shape of strips or a kind of sectional or profiled strips which are placed 
each at least between the two longitudinal edge portions of the basic 
bodies. At the two transverse edge portions, the sealing may be effected 
by the drive mechanism, on the one hand, and an end piece, on the other 
hand, with proper insulating inserts for preventing cold bridges being 
provided at these sides too. 
A preferred development of the ventilation register with insulating 
sectional strips, provides that the insulating sectional strips are 
connected to the basic bodies by snap action or interlocking means. This 
simplifies not only the assembly, but also maintenance and repair. In 
addition, the manufacturing costs can be reduced if the locking or snap 
elements are formed or molded integrally with or similarly secured to the 
basic bodies, on the one hand, and the insulating sectional strips on the 
other hand. 
Accordingly an object of the present invention is to provide a ventilation 
register which reduces heat loss and is formed of two spaced apart body 
members each having a movably mounted shutter thereon for selectively 
opening and closing an opening in each body member, said body members 
connected to each other by at least one insulation connector member 
connected therebetween. 
A further object of the invention is to provide a ventilation register 
which is simple in design, rugged in construction and economical to 
manufacture. 
The various features of novelty which characterize the invention are 
pointed out with particularity in the claims annexed to and forming a part 
of this disclosure. For a better understanding of the invention, its 
operating advantages and specific objects attained by its uses, reference 
is made to the accompanying drawings and descriptive matter in which a 
preferred embodiment of the invention is illustrated.

DESCRIPTION OF PREFERRED EMBODIMENT 
The register substantially comprises two bodies 1, 2, shutters 3, 4 which 
are mounted thereon for displacement perpendicularly to the drawing plane, 
and two insulating sectional strips 5, 6 by which basic bodies 1, 2 are 
connected to each other in a heat insulating manner while forming a 
chamber 7 therebetween. At the two narrow sides of the register, the 
chamber is closed by means of end pieces (not shown) of which one may be 
designed additionally, as a drive element. Such a drive element is 
connected to the two shutters 3, 4 which are provided at the inside, or to 
a coupling member 50 inserted therebetween, so that the shutters can be 
moved simultaneously and in the same direction. In the embodiment shown, 
shutter 3 is provided with conventional, substantially rectangular 
ventilation slots 8, while shutter 4 is designed with ventilation 
apertures arranged in groups of small ventilation holes 9. These groups 
form a system of longitudinal and transverse rows of holes, extending 
approximately over the area of one ventilation slot 10 of basic body 2. 
The lands between ventilation slots 10 or between the ventilation hole 
groups of shutter 4, correspond in extension about to the width of 
ventilation slot 10. 
The ventilation slots of basic body 1, in the embodiment shown, are 
trisected by two webs 11 and 12. An angled weather strip 13, 14, which is 
slightly slanting and extends outwardly then downwardly, is connected to 
each of the two webs. Above the uppermost partial ventilation slot 15, 
another weather strip 16 is provided which is directly connected to a 
reinforcing angle 17. A drip lip 18 is provided on the lower end of each 
of the partial ventilation slots. On its lower longitudinal edge portion 
19, basic body 1 supports an angled, preferably rectangular, glass pane 
stop flange 20. A register of such design is suitable for being seated on 
top of a pane, preferably insulating glass pane, i.e. this register is 
intended for being engaged into a glass groove. However, this design is 
not limited to such application, and with a slight modification, 
particularly on the upper and lower longitudinal edge, the register may 
also be used as a conventional frame ventilator or in a wall opening. 
The two basic bodies 1, 2, as already mentioned, are connected to each 
other through an insulating layer intended for preventing or at least 
rendering more difficult a heat convection from one basic body to the 
other and comprising, in the embodiment shown, two insulating sectional 
strips 5, 6 provided at the upper and lower longitudinal edge portions of 
the two basic bodies. As may be learned from the drawing, the sectional 
strips are of quite particular shape, which also permits connection of the 
basic bodies 1, 2 to the intermediate sectional strips 5, 6 by shapping or 
interlocking. For this purpose, locking sockets 21, 22 and 23, 24 having a 
U-shape cross-section are provided on the upper and lower longitudinal 
edge portions of the two basic bodies. Each of these sockets is 
interlockable with a locking member 25, 26 and 27, 28 of the associated 
insulating sectional strip 5, 6 which also is substantially U-shaped. The 
free ends of the U-legs of both the locking sockets and the locking 
members are formed with locking beads which engage each other from behind, 
as shown in the drawing. 
Guides known per se (not shown) for the two shutters 3, 4 may be provided 
on basic body 1 or 2. In addition, or as an alternative, seal strips 29, 
30 and 31, 32 may be provided, which apply against the insides of the 
shutter 3, 4. In the shown embodiment, the seal strips are formed 
integrally with the two insulating sectional strips 5, 6 which, 
preferably, are identical in design and mounted in mirror-inverted 
positions in the register. The seal strips extend in a plane inclined 
relative to that of shutters 3, 4 and are intended to press the shutters 
against the inside surface of the respective basic body and thus to reduce 
their sliding fit. The seal strips must therefore be sufficiently elastic. 
On the other hand, their free portions or sealing lips are exposed to a 
certain friction during the operation of the shutters and must be 
relatively resistant, at least in this sealing lip portion. For this 
reason, it is provided in accordance with a further development of the 
invention, that each seal strip 29, 30 and 31, 32 is designed as a 
so-called hard-soft seal strip having its free end 33 applying against the 
shutter, made of a hard material, and as for the rest, being made of a 
softer material of proper elasticity. A suitable elastomer therefore can 
be used. A preferred design of the seal lip 33 is a slightly thickened 
portion, particularly having a circular cross-section. 
The webs of the two locking members 25 and 28 of strip 5 and 26 and 27 of 
strip 6 are connected to each other, preferably integrally, by means of an 
intermediate member 34 and 35, respectively, having a substantially 
T-shaped cross-section. The T-shaped flanges 36, 37 of the member 34, 35 
serve as abutments for the seal strips extending adjacently and at both 
sides, particularly for the free end portions or lips 33 thereof. This 
design makes it possible to omit separate guides on basic body 1, 2 for 
shutters 3, 4. 
The two insulating sections or profiled strips 5, 6 are provided with a 
plurality of laterally spaced apart mounting holes 38 which are aligned 
with corresponding holes or bores 39, 40 of the two basic bodies 1, 2. The 
axis of mounting holes 38 lie in the central plane of U-shaped locking 
members 25 to 28. If a reinforcing angle 17 is used, the vertical leg 
thereof is provided with a bore 41 which is aligned with the mentioned 
other bores. Through all these holes or bores, the inventive ventilation 
register can be screwed to a supporting structure (not shown) such as a 
window frame or the like. The ends close to basic body 2 of mounting hole 
36 are enlarged to receive the screw heads. This provides for a thermal 
insulation of the screws, so that in this zone again, cold bridges are 
absent. This countersink is shown at 42. Each of the two insulating 
sectional strips 5, 6 is formed on its outside longitudinal edge with a 
mounting groove 43, 44 of substantially angular section, for a glass pane 
stop (not shown). A thermal separation and advantageous design in 
accordance with the objective of the invention is thereby obtained also in 
this area. 
The special design of shutter 4 in itself already prevents flies and other 
vermin from passing therethrough. However, one or two fly screens (not 
shown) secured in a known manner, may be provided in addition. This will 
particularly be the case if shutters with conventional rectangular 
ventilation slots are employed. 
While a specific embodiment of the invention has been shown and described 
in detail to illustrate the application of the principles of the 
invention, it will be understood that the invention may be embodied 
otherwise without departing from such principles.