U.S. patent number 3,604,173 [Application Number 04/780,515] was granted by the patent office on 1971-09-14 for resilient floor.
Invention is credited to Rune Ingmar Douglas Dahlborg.
United States Patent |
3,604,173 |
Dahlborg |
September 14, 1971 |
RESILIENT FLOOR
Abstract
The invention relates to resilient or elastic floors comprising
an upper floor supported on a resilient means lying on a support.
Said resilient means is built up from a lower layer of resilient
elements positioned on the support, an intermediate floor
positioned on said lower layer, and an upper layer of resilient
elements positioned on the intermediate floor and supporting said
upper floor.
Inventors: |
Dahlborg; Rune Ingmar Douglas
(Bandhagen, SW) |
Family
ID: |
20302847 |
Appl.
No.: |
04/780,515 |
Filed: |
December 2, 1968 |
Foreign Application Priority Data
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Dec 7, 1967 [SW] |
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16836/1967 |
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Current U.S.
Class: |
52/508; 52/480;
52/346 |
Current CPC
Class: |
E04F
15/22 (20130101) |
Current International
Class: |
E04F
15/22 (20060101); E04f 015/22 () |
Field of
Search: |
;52/346,347,364,366,378,393,688,480,508 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
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847,342 |
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Aug 1952 |
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DT |
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2,288 |
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Jun 1878 |
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GB |
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Primary Examiner: Sutherland; Henry C.
Claims
I claim:
1. A resilient floor, for use in gymnastic and athletic
establishments, comprising an upper floor, a resilient structure
for supporting said floor and a rigid support beneath said
resilient structure for supporting same, said resilient structure
comprising at least one lower layer of a plurality of resilient,
independent, studlike elements supported by said rigid support and
spaced from each other and distributed thereon in a spaced square
formation, a diaphragm arranged on said lower layer of resilient
elements and spaced uniformly from said rigid support, at least one
upper layer of a plurality of resilient, independent, studlike
elements arranged on said diaphragm and spaced from each other and
distributed thereon in spaced squared formation and displaced
relative to said resilient elements of the lower layer so that each
upper element lies in the center of the square formed by the lower
resilient elements when viewed in plan and a plurality of planar
means, said resilient elements being attached thereto in the
desired spaced relation to facilitate the positioning of the
elements when erecting the floor, said upper floor resting on said
upper layer of resilient elements.
2. A resilient floor according to claim 1, wherein said planar
means to which said resilient elements are attached are in turn
attached to opposite sides of said diaphragm with the resilient
elements extending outwardly therefrom.
3. A resilient floor according to claim 1 wherein said resilient
studlike elements are composed of cork.
4. A resilient floor according to claim 1, wherein said resilient
studlike elements are composed of resilient plastic.
5. A resilient floor according to claim 1 wherein said diaphragm is
composed of a composite wood sheet.
6. A resilient floor according to claim 5 wherein said diaphragm is
composed of a plurality of coplanar sheets and further comprising
means attaching the sheets in coplanar relation.
Description
The present invention relates to resilient or elastically yielding
floors, for instance for gymnastic establishments and the like.
In gymnastic and athletic establishments and similar buildings the
floor covering is subject to certain requirements, as concerns its
ability to yield elastically under load. Even if the problem of
providing floors having the necessary resilience may seem simple at
a cursory glance the experience shows, however, that the
constructions will be expensive, time-consuming in erection and,
moreover, to a great extent require a large space. Several designs
are known and, usually, the floor is erected on a resilient
structure consisting in a complicated system of wooden crossbars
arranged on a nonresilient support, for instance on a concrete
arch. Such a resilient structure is time-consuming in erection,
requires excessive amounts of material and, moreover, requires an
unnecessarily large vertical space, often even up to 20 cm. It is
easily understood that the high cost in combination with the
excessive space requirement of the structure causes an essential
rise in price as compared to a conventional, nonresilient
floor.
Moreover, it is subject to quite great difficulties to provide a
uniform resilience and an acceptable elasticity irrespective of the
point of action on the floor with a resilient floor based on a
system of wooden crossbars as described above. Thus, there is a
great demand for a cheap resilient floor that can be manufactured
at a low price and in a short period of time and, moreover,
requires a vertical space comparable to the requirement of
conventional, nonresilient floors.
According to the present invention it has now surprisingly been
found that a floor with resilience or elasticity comprising an
upper floor supported on a resilient means, said resilient means
being in turn supported on a support, for instance a concrete arch,
can be obtained by making the resilient means from a lower layer of
resilient elements supported on the support and evenly distributed
thereon, an intermediate floor or diaphragm arranged on said lower
layer and an upper layer of resilient elements arranged on the
intermediate floor and evenly distributed thereon, the upper floor
resting on said upper layer. Particular advantages are gained when
the resilient elements in said lower layer are arranged in square
formation on the support and the resilient elements in said upper
layer are arranged in square formation on the intermediate floor
and so displaced relative to the elements of the lower layer that
each element of the upper layer lies in the center of the square,
at the angles or corners of which the adjacent elements of the
upper layer are positioned.
In order to facilitate the positioning of the elements on the
support and the intermediate floor the resilient elements may be
attached to bands, for instance of plastic or textile.
The present invention will now be described more closely to an
exemplifying embodiment thereof diagrammatically shown in the
appended drawing.
FIG. 1 shows a vertical section through the embodiment of the floor
of the invention.
FIG. 2 shows a plane view from above of the embodiment of FIG. 1
having the upper floor removed.
In the embodiment shown in Fig. 1 the floor of the invention is
arranged on a nonresilient support 1, for instance a concrete arch
or a concrete floor. FIG. 1 shows part of the floor in a vertical
section adjacent to a wall 3 having a kick ledge 4.
The floor structure proper consists in an upper floor consisting of
a lower floor 5 of for instance wood fiber board or a particle
board preferably tongued and grooved, and a floor covering 7
consisting of a linoleum mat, milled or textured vinyl plates or
the like. The resilient part of the floor structure is based on two
layers of resilient elements 9 and 10, respectively, separately by
an intermediate floor or diaphragm 6. Resilient elements 9 are, in
the embodiment shown, attached to plastic or textile bands 8, 12
and consist of cork plates or discs.
In FIG. 2 there is shown a plan view of the floor of FIG. 1, the
upper floor being removed. The resilient elements 9 of the lower
layer are indicated with dotted circles in FIG. 2 and said elements
9 of the lower layer are arranged in a square formation by
positioning bands 8 regularly spaced and parallel to each other.
The resilient elements 10 of the upper layer in FIG. 2 indicated
with full circles are also arranged in a square formation but
displaced relative to the lower layer half a pitch lengthwise and
half a pitch crosswise. By this arrangement every element 10 of the
upper layer will be positioned at an equal distance from each of
the adjacent four elements 9 of the lower layer.
The described embodiment of the floor of the invention is shown in
FIG. 1 in scale 1:2 and, thus, it is obvious that, in spite of the
resilient characteristics of the floor, the structural height
thereof does not essentially exceed that of a conventional,
nonresilient floor. In view of the nonexpensive and simple design
of the embodiment described above it may very well be used in
floors in ordinary living houses, business and office apartments
etc. Thanks to its resilience the floor will substantially reduce
the tiredness in the legs of the persons staying on the floors in
question. Of course, this is of a particular importance in such
applications, where the persons in view of their profession walk
over large distances, for instance in hospitals, shops and the
like.
The intermediate floor 6 can consist of particle board or plywood
sheets, and the joints between the sheets may be suitably fixed
with joint profiles 15, for instance of rigid plastic (FIG, 1).
The embodiment of the floor of the invention shown in FIGS. 1 and 2
has excellent resilience characteristics in view of the fact that
the resilience will be the same irrespective of the point of action
on the floor thanks to the positioning of the elements 9, 10. Thus,
the structure is particularly useful in gymnastic, athletic, and
similar establishments and causes, in view of its simple design, a
very small rise in price as compared to conventional, nonresilient
floors. As shown in FIG. 1, where the floor is illustrated in scale
1:2, the building height is surprisingly small, in the example
shown merely about 45 mm. The distance between the resilient
elements in each layer may vary within wide limits depending on the
particular materials used in the floor. However, in most cases a
distance of about 15-20 cm. has been found suitable.
The resilient elements 9, 10 of the embodiments described above
may, of course, by made of any suitable resilient material. Thus,
capsules of plastic similar to those used for closing certain wine
bottles may be used with advantage. Such plastic capsules may
advantageously be welded with heat on plastic bands, the capsule
suitably in the side wall thereof being provided with holes for
increasing the resilience thereof.
The bands carrying the resilient elements 9, 10 may, in the
factory, preferably be attached to both sides of the intermediate
floor 6, whereby the time of work at the site can be substantially
reduced. (Bands 11 indicated with broken lines in FIg. 1 and band
12 with full lines).
Thus, a surprisingly good resilience is obtained with the floor of
the present invention, which resilience well fulfills the
requirements on floors of gymnastic and athletic establishments
etc. Moreover, a very good sound insulation is obtained with the
floor, which essentially reduces the transmission of walk noise
when using the floor in tenement houses or the like. In view of its
sound-insulating ability the floor of the invention may, of course,
also advantageously be used as a support for certain machinery,
preferably light machines, so as to avoid transmission of machine
vibrations and other machine noises to spaces lying below.
* * * * *