Note: Descriptions are shown in the official language in which they were submitted.
CA 02646375 2008-12-11
My invention relates to a temporary spiral staircase which may be used in
conjunction with
scaffolding of all types and during building construction where temporary
access is required. This
invention can be used for access with any scaffold system and also as a
standalone for means of
temporary access while being quicker, tidier and faster than conventional
temporary stairs.
The invention is a spiral staircase with advantages over conventional
temporary staircases. This
spiral staircase may take the form and process of two main intended designs.
One is where the core is a
telescoping series of tubes. These tubes fit within each other and may take
the form of any shape and
any amount of telescopic inner posts. The foundation of the stair shall
comprise of an adjustable base
and have the first set of stairs permanently connected to the first outer
telescopic tube. The base shall
also include intended initial amount of telescopic tubes within the first
telescopic tube. The base may
also be foldable at the half point with square tubes at the bottom for
forklift forks so to be transported
easily and safely by a forklift. To assemble the staircase firstly the second
telescopic tube must be
raised into position and locked. The stair pieces are then slid onto the tube
into their select positions.
These stair pieces shall comprise of a tube telescopically larger than the
inner telescopic base tube and
shall have teeth at the top and bottom so to prevent rotational movement of
the stairs. Connected to the
tube shall be the stair which may take any shape or size, and also be
supported by a horizontal member.
The stair pieces shall be stacked until the desirable height is archived and
the locking pin also be
inserted at the top of the stair post for added safety.
If the staircase does not meet the desired access height when fully erected or
when multiple
access points are required throughout the staircase height then landing
members shall be added in place
of a stair member. This member shall simply comprise of a wider surface area
for easier access to the
staircase.
The stair members shall also have at the end a hole at which a guardrail may
be connected.
These rails will be constructed so that they shall fit together perfectly
throughout the staircase. The
only exception will be when the stairs meet a landing, at this point special
guardrails shall be installed
at that specific point to provide safety when accessing the staircase.
The stair members may also be telescopically adjustable in a horizontal
direction to
accommodate a wider walking surface if desired. This telescopic movement
within the stair shall be
locked by a pin underneath the stair at intermittently adjacently aligning
drilled holes.
The second design is where the stair members and the inner telescopic posts
may also
incorporate the rosette scaffold locking pin and ring as a method of
construction. Whereas instead of a
telescopic inner set of posts there would be stackable and larger than normal
rosette posts with rosette
rings intermittently spaced at desired heights. And whereas the stair shall be
connected to the inner
rosette post rings by means of the rosette lock being engaged to the ring at
desired intervals.
The objective of the invention is to have a temporary staircase which has
minimal parts in
comparison to any current temporary staircases. This cuts labour costs and
helps eliminate having
missing or lost parts. The staircase is also very safe with many safety
features.
Another objective is the adjustable stair width. This advantage adds confort
where possible and
when desirable by accommodating up to two persons walking side by side.
Another objective is the ability to have a landing wherever it is needed'for
access to a level.
This is particularly a problem associated with current scaffold based
staircases where the error margin
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is is too great to hit the landing head on every time. Between the methods of
adjustable riser heights,
stair distances and landings and a rotatable central tube it is therefore much
easier to meet an access
point where access is desired.
Other important objects and advantageous features of any invention will be
apparent from the
following description and accompanying drawings, wherein for present purpose
of illustration only,
specific embodiments of the invention are set forth in detail.
In the drawings:
Figure 1 is a perspective view of a spiral stairway with base stairs and
telescopic tubes down.
Figure 2 is a perspective view of a spiral stairway with base stairs and
telescopic tubes up and in
the locked position.
Figure 3 is a perspective view of a spiral stairway fully erected with stairs.
Figure 4 is a perspective view of a spiral stairway with a foldable ba'se
Figure 5 is a perspective view showing the top portion of an erect stairway
where a landing has
been installed.
Figure 6 is a perspective view of a spiral stairway with base stairs and
industry normal rosette
system rings incorporated into the center support and rosette locks
incorporated into the stair members.
Figure 7 is a detailed perspective view of industry normal rosette rings
incorporated into the
center support and rosette locks incorporated into the stair members.
Figure 8 is a perspective view of a telescopically adjustable stair being
incorporated into the
step when industry normal rosette rings are used with the center support and
rosette locks are used
within the stair members.
Referring to the drawings in detail in Figure 1 the numeral 1 shall represent
the base platform
where 2 four rings are connected around the platform to allow 3 height
adjustable screw jacks to slide
through to support the platform all around. At the center of 1 the platform
shall be 4 the permanent and
largest telescopic cylindrical tube, within this tube telescoping in a
vertical movement are 5 and 6,
second and third telescopic tubes which expand to accompany additional stair
members. Permanently
affixed to 4 the first and largest tube shall be the first flight of stairs
where 8 (shown as transparent for
clarity) represents the step platform. This platform is supported by 9 any
shaped horizontally
supporting bar, at the end of this bar shall be 7 a cylindrical tube which
will allow a guardrail to be
installed. This guardrail will be safely secured by sliding a pin through
drilled holes.
In Figure 2 the numeral 1 shall represent the base platform where 2 four rings
are connected
around the platform to allow 3 height adjustable screw jacks to slide through
to support the platform all
around. At the center of 1 the platform shall be 4 the permanent and largest
telescopic cylindrical tube,
within this tube telescoping in a vertical movement are 5 and 6, second and
third telescopic tubes which
are fully expanded. Permanently affixed to 4 the first and largest tube shall
be the first flight of stairs
where 8 (shown as transparent for clarity) represents the step platform. This
platform is supported by 9
any shaped horizontally supporting bar, at the end of this bar shall be 7 a
cylindrical tube which will
allow a guardrail to be installed. This guardrail will be safely secured by
sliding a pin through drilled
holes. 10 a locking pin is installed through holes in 5 and 6 the second and
third telescopic tubes to lock
them in the erect position.
In Figure 3 the numeral 1 shall represent the base platform where 2 four rings
are connected
around the platform to allow 3 height adjustable screw jacks to slide through
to support the platform all
around. At the center of 1 the platform shall be 4 the permanent and largest
telescopic cylindrical tube,
CA 02646375 2008-12-11
within this tube telescoping in a vertical movement is 6, the third telescopic
tubes which is fully
expanded. Permanently affixed to 4 the first and largest tube shall be the
first flight of stairs where 8
(shown as transparent for clarity) represents the step platform. This platform
is supported by 9 any
shaped horizontally supporting bar, at the end of this bar shall be 7 a
cylindrical tube which will allow a
guardrail to be installed. This guardrail will be safely secured by sliding a
pin through drilled holes. 10
a locking pin is installed through holes in both inner telescoping tubes, seen
in this drawing is only 6
the third tube.
Interlocking cylinders with gear teeth at the top and bottom 11, conforming
around the second
inner telescoping tube is the second flight of stairs. Connected to the outer
part of 11 shall be the stair
members where 8 represents the step platform. This platform is supported by 9
any shaped horizontally
supporting bar, at the end of this bar shall be 7 a cylindrical tube which
will allow a guardrail to be
installed. The outer diameter of 11 shall be equivalent to the outer diameter
of 4 the largest base tube,
the inner diameter of 11 shall be equivalent to the outer diameter of the
second telescopic tube.
The third interlocking cylinders with gear teeth at the top and bottom shown
by 12 conform
around 6 the third telescoping tube standing as the third flight of stairs.
Connected to the outer part of
12 shall be the stair members where 8 represents the step platform. This
platform is supported by 9 any
shaped horizoritally supporting bar, at the end of this bar shall be 7 a
cylindrical tube which will allow a
guardrail to be installed. The outer diameter of 12 shall be the equivalent to
the outer diameter of 4 the
largest base tube, the inner diameter of 12 shall be equivalent to the outer
diameter of 6 the third
telescopic tube.
A guardrail 13 shall be installed into 7 cylinders at the end of 9 the
supports and 8 the stair
platforms. The guardrails 13 shall be locked by 15 a locking pin inserted
through drilled holes to safely
lock the guardrail in place. The guardrails 13 fit together where one end is
open and half cut away to
accommodate 14 extruded cylinders from the last installed guardrail. The
extruded cylinders 14 shall
have an outer diameter the same as the inner diameter of the tubing used for
13 the guardrails. The
guardrails 13 were not depicted throughout the stairs for clarity.
In Figure 4 the numeral 1 depicts the base platform split in half and folded
at a 90 degree
position for transport. Connected at four points around 1 the platform shall
be 2 four rings to allow 3
height adjustable screw jacks to be installed to support the platform all
around. Connecting 2 all four
cylindrical rings shall be 16 reinforcing bars which may take any shape. At
the bottom of one end of the
platform shall be 17 two rectangular tubes which will allow forklift forks to
be inserted to safely
transport the base stair unit safely. At the center between the two halves of
1 the platform shall be 19
and 20 hinges used to rotate half of the platform 90 degrees to the folded
position or to the open
position. Two of the hinges 19 shall be connected to one side of the platform
1 and the other two 20
shall be connected to the other half of the platform 1. Inside the hinges 19
and 20 shall be 18 a long rod
which the hinges will rotate upon. Also seen in this drawing are the stair
members where 8 (shown as
transparent for clarity) represents the step platform. This platform is
supported by 9 any shaped
horizontally supporting bar, at the end of this bar shall be 7 a cylindrical
tube which will allow a
guardrail to be installed. And 6 the third telescopic cylinder shown in the
down position.
In Figure 5 the numeral 6 represents the third cylindrical telescopic tube in
the up position with
the second telescopic tube shown below. Bottom stair members and some
accessories were left out of
this drawing for clarity. The third interlocking cylinders with gear teeth at
the top and bottom shown by
12 conform around 6 the third telescoping tube standing as the third flight of
stairs. Connected to the
outer part of 12 shall be the stair members where 8 represents the step
platform. This platform is
CA 02646375 2008-12-11
supported by 9 any shaped horizontally supporting bar, at the end of this bar
shall be 7 a cylindrical
tube which will allow a guardrail to be installed. The outer diameter of 12
shall be the equivalent to the
outer diameter of the largest base tube, the inner diameter of 12 shall be
equivalent to the outer
diameter of 6 the third telescopic tube.
Wherever necessary for access shall be installed in place of a normal stair
member a landing
where the step platform 23 is larger than 8 a normal step (this step is shown
as transparent for clarity).
Supporting 23 from the bottom shall be 9 two horizontal bars of any geometry,
at the end of these bars
shall be connected 7 cylindrical rings for guardrails to be installed.
Installed into the cylindrical rings 7
where a landing is needed shall be 21 on one side, a guardrail specially
manufactured for this side of
the landing locked in place by 15 a locking pin inserted through adjacent
holes through 7 the tube
responsible for holding the guardrail. Out the end of 21 which meets with the
last regular guardrail 13
shall be 14 cylinders which allow 13 the last guardrail to lock to the next
through a 180 degree cut at
the meeting end of 13. The normal guardrail represented by 13 shall also lock
into 7 cylinders
connected to the stair member locked in place by 15 a locking pin inserted
drilled through holes.
Located and locked in place by 15 a locking pin inserted through holes at 7
the cylindrical tube shall be
22, at the other side of the landing where another specially manufactured
guardrail is installed. At the
end of 22 where this special guardrail meets the next installed regular
guardrail 13 shall be a 180
degree cut to accommodate 14 the cylinders extruded from the one end of 13 the
next regular guardrail.
In Figure 6 the numeral 1 shall represent the base platform where 2 four rings
are connected
around the platform to allow 3 height adjustable screw jacks to slide through
to support the platform all
around. Connected at the center of 1 the base platform shall be 24 a large
tube with periodically spaced
27 industry normal rosette rings. Locked to each ring 27 shall be 28 industry
normal rosette locks
locked to the ring by 29 a locking pin. Connected to the back of 28 shall be 8
the step platform (shown
as transparent for clarity) which is supported by 9 any shaped horizontal
supporting bar, at the end of
this bar shall be 7 a cylindrical tube which will allow a guardrail to be
installed (the same guardrail
shall be installed as depicted in Figure 3). For extra support there shall be
25 a diagonal support
connected to the bottom of 9 the horizontal supporting bar, this bar will
distribute applied forces to 26 a
plate with a curvature that resemble that of the exterior diameter of 24 the
center post, this is to further
distribute weight exerted upon the step.
In Figure 7 the numeral 1 shall represent the base platform where connected at
the center shall
be 24 a large tube with periodically spaced 27 industry normal rosette rings.
Locked to each ring 27
shall be 28 industry normal rosette locks, locked to the ring through 30 a
hole by 29 a locking pin.
Connected to the back of 28 the rosette lock shall be 8 the step platform
(shown as transparent for
clarity) which is supported by 9 any shaped horizontally supporting bar. For
extra support there shall be
25 a diagonal support connected to the bottom of 9 the horizontal supporting
bar, this bar will distribute
applied forces to 26 a plate with a curvature that resemble that of the
exterior diameter of 24 the center
post, this is to further distribute weight exerted upon the step.
CA 02646375 2008-12-11
In the drawings:
Figure 1 is a perspective view of an adjustable telescopic post in the locked
position.
Figure 2 is a perspective view of an adjustable telescopic post in the
unlocked position.
Referring to the drawings in detail in Figare 1 the numeral represents the
large outer post
(shown as transparent for clarity) in which 2 the smaller telescopic post
travels horizontally within.
Extruded from 2 until the inner diameter of I shall be 6, stoppers which hold
2 the smaller tube locked
in place from horizontal movement by straddling 5 a stopper extruded from the
inner diameter of 1 at
the open end to the outer diameter of 2 the smaller tube. The extruded stopper
5 shall be extruded only
half the circumference of the inner diameter of 1 the large telescopic tube. 5
shall be no wider than 7
the space between 6 the extruded stoppers of 2. The rotational force lock is
represented by 4 where its
outer diameter is the same as I the large tube. At the bottom half of the
circumference of 4 the inner
diameter shall be the same as the outer diameter of 2 the smaller tube. At the
other half of the
circumference of the rotational lock 4 the inner diameter shall be the same as
the inner diameter of 1
the large telescopic tube. 8 shall represent an extruded part of 4 the
rotational lock where the extrusion
is horizontally from the inner diameter of 1 to the outer diameter of 2. This
extrasion 8 shall be half the
circumference of 4 the rotational lock to protrude into 1 the large tube where
5 the inner extruded part
of 1 is not so when locked 8 will prevent 6 the stoppers upon 2 from rotating.
The entire width of 4 the
rotational lock and its extruded part 8 shall be no wider than 7 the space in
between 6 the extruded
stoppers on 2. At the end of 2 the small tube which is inside 1 the Iarge tube
shall be 3 an extruded
stopper which will have an outer diameter the same as the inner diameter of 1
so to travel smoothly
inside 1 and also will prevent 2 the smaller tube from coming completely out
of 1 the large tube
because 5 the inner extruded part of 1 shall not allow the larger extruded
part 3 to travel past. Attached
at the ends of 2 the small tube and 1 the large tube shall be an industry
normal rosette lock, where 10 is
the head and 9 is the locking wedge pin which travels through a hole in 10 to
wedge locked when
forced by hammer. The industry nonT-al rosette lock 10 and 9 may be
substituted for an industry
normal tube clamp if the need arises.
In Figure 2 the numeral represents the large outer post (shown as transparent
for clarity) in
which 2 the smaller telescopic post travels horizontally within. In this
drawing 2, the smaller tube is in
the unlocked position upside down where 6 the extruded stoppers are not
stopped by 5 the extruded
stopper inside 1 the larger tube. Therefore 2 may slide in and out until the
desired length is selected.
When in the unlocked position 4 the rotational lock must be positioned with 8
its horizontal extrusion
up, this is to allow 6 the stoppers along 2 to travel freely through the gap
amidst the bottom inside
diameter of 4. 3 the stopper at the end of 2 shall stop 2 from escaping past 5
the inner extrusion of 1 the
large tube. The industry normal rosette lock 9 and 10 at the end of 2 the
smaller tube will be upside
down during the unlocked position so to clarify that the post is unlocked.
However if the industry
normal rosette lock is substituted for an industry normal tube clamp there
will be no difference.
To lock the post from this unlocked position first the desired length mush be
selected where 7
the space between the stoppers extruded from 2 the smaller tube is even with 5
the inner extrusion of 1
the large tube. At this point there will be 6 two stoppers to the sides of 5,
2 the smaller tube is then
rotated 180 degrees until 5 the inner extrusion of 1 is perfectly parallel
with 6 the outer extrusions of 2.
The rotational lock 4 is then rotated 180 degrees within 7, this lock is then
pushed horizontally towards
and into 1 where the extrusion 8 slides in under 5 the large tube I extrusion.
For a detailed view of the
posts in the locked position see Figure 1.
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