Segmented spiral staircase and kit for its construction
A segmented spiral staircase and kit for its construction has a plurality of laterally extending step segments. Each step segment has a step surface with an inboard, donut-shaped end section and lower downwardly extending support members. Each step segment also has an upstanding baluster rail member connected by screws to the outboard end of the step surface. The step segments are each rotatably mounted, at their respective inboard end sections, in offset fashion through a vertically standing support post. The baluster rail members of the step segments are configured to be aligned adjacent to each other and are connected one to the other by screws. Spacer sleeves separate each of the step segments, whose lower support members are positioned against the vertical surfaces of the sleeves. Alternate stacking of the sleeves and step segments and connection of the baluster rail members produces a sturdy staircase structure which also includes an upper landing member. The relatively lightweight nature of the components of the kit make assembly easy and, by simply removing the screw connections between baluster rail members, a step segment or entire section of the staircase made up of several step segments can be rotated around the vertical support post to alter the configuration of the staircase.
This application is a continuation-in-part of application Ser. No. 11/169,548, filed on Jun. 29, 2005.
BACKGROUND OF THE INVENTIONSpiral staircases are both functional and decorative structures which allow for access between floors of residential and commercial spaces. Spiral staircases also are favored because of the smaller amount of space they require, as opposed to straight staircases. There are many occasions in which there simply is insufficient room in a building space for a straight stairway, and no other means to interconnect two levels, except by using a spiral staircase.
However, although a spiral staircase occupies a relatively small area, it presents difficulties in construction. For instance, there are logistically problems with the use of prefabricated spiral staircase units, both in safely packing and protecting them for shipment. The carriage and delivery of prefabricated staircases also may be cumbersome and difficult, especially in getting the staircases into the rooms where they are to be installed. In fact, most standard spiral staircases will not fit into many smaller rooms, resulting in the need to order customized units, with the resulting increase in price. In addition, there are usually installation problems in properly fitting spiral staircases between floors.
To overcome these problems, there have been attempts to provide spiral staircase installations with components which can be assembled on the job. Some examples of these are found in U.S. Pat. Nos. 1,361,918, 3,740,906, 3,964,222, 4,128,976, 4,850,164 and 5,557,893.
However, these and similar spiral staircase installations result in structures which are often not very sturdy. They may be unstable and wobbly, and even unsafe. In addition, most prior assembled spiral staircases are complicated and difficult to put together. They have many different component parts, requiring connection by bolts, screws, nails, rivets, or even welding or brazing.
Another handicap of existing spiral staircases is that they are designed to be permanent installations. If there is a need to temporarily change the configuration of the staircase, for instance to transport large pieces of furniture up the staircase, the permanently installed curved nature of the staircase makes this most difficult.
SUMMARY OF THE INVENTIONIt is thus the object of the present invention to overcome the limitations and disadvantages of prior spiral staircases and spiral staircase assemblies and kits.
It is an object of the present invention to provide a spiral staircase kit which, when its components are assembled, results in a spiral staircase which is steady, sturdy, and safe for use.
It is another object of the present invention to provide a spiral staircase and spiral staircase kit which comprises relatively few different components.
It is still another object of the present invention to provide a spiral staircase and spiral staircase kit with components which are inexpensive and easy to manufacture, lightweight, and simple to assemble.
It is a further object of the present invention to provide a spiral staircase and spiral staircase kit in which all components are easily handled for assembly and installation of the complete spiral staircase unit.
It is still a further object of the present invention to provide a spiral staircase which, in its disassembled state, is easily transportable to the installation site.
It is another object of the present invention to provide a spiral staircase kit which requires minimal use of screws, nails, bolts, rivets or other connecting elements.
It is a further object of the present invention to provide a spiral staircase and spiral staircase kit whose components can be configured and manufactured with a plurality of attractive design options.
It is another object of the present invention to provide a spiral staircase kit which allows installation of the staircase between floors where space is limited.
It is still another object of the present invention to provide a spiral staircase kit which results in the assembly of a spiral staircase which can be configured and customized for any space.
It is a further object of the present invention to provide a spiral staircase kit which results in a spiral staircase which has a plurality of step segments which are readily disconnected to conveniently alter the configuration of the staircase.
These and other objects are accomplished by the present invention, a segmented spiral staircase and kit for its construction having a plurality of laterally extending step segments. Each step segment has a step surface with an inboard, donut-shaped end section and lower downwardly extending support members. Each step segment also has an upstanding baluster rail member connected by screws to the outboard end of the step surface. The step segments are each rotatably mounted, at their respective inboard end sections, in offset fashion through a vertically standing support post. The baluster rail members of the step segments are configured to be aligned adjacent to each other and are connected one to the other by screws. Spacer sleeves separate each of the step segments, whose lower support members are positioned against the vertical surfaces of the sleeves. Alternate stacking of the sleeves and step segments and connection of the baluster rail members produces a sturdy staircase structure which also includes an upper landing member. The relatively lightweight nature of the components of the kit make assembly easy and, by simply removing the screw connections between baluster rail members, a step segment or entire section of the staircase made up of several step segments can be rotated around the vertical support post to alter the configuration of the staircase.
Novel features which are considered as characteristic of the invention are set forth in particular in the appended claims. The invention itself, however, both as to its design, construction and use, together with the additional features and advantages thereof, are best understood upon review of the following detailed description with reference to the accompanying drawings.
As seen in
The spiral staircase kit of the present invention is assembled by initially positioning the lowermost end of support post 2 within opening 38 of foot member 36. Opening 21 of sleeve 20 is positioned over post 2 and then sleeve 20, as shown in
Once step segment 4 is placed in the proper position on sleeve 20, the force of gravity compels the step segment against the sleeve, resulting in end section 13 resting flush on top of sleeve 20 and vertical surfaces 17 and 18 of lateral support members 15 and 16 resting flush against and in adjacent contact with a lateral surface of sleeve 20. Step surface 12 thus becomes fixedly positioned in a transverse plane in relation to support post 2.
As previously described, since the diameters of the openings of all the sleeves and steps used in the present invention are the same, once the initial sleeve 20 and step segment 4 are in place, as seen in
As can be readily appreciated, sleeves 23-28 and the remaining sleeves to be used for the staircase system and the end sections of step segments 5-11 and the remaining step segments to be used, each with their respective baluster members (all sleeves and step segments are seen in
Placing step segments 4-11, the remaining step segments (not shown in
Should the configuration of spiral staircase 1 need to be altered, for instance if large furniture is to be transported up the staircase, screws 54 between the effected, adjacently aligned step segments can easily be removed, thus separating step segments or entire sections of the staircase made up of several step segments from each other, allowing the step segments to be rotated around support post 2 to alter the configuration of the staircase.
It is contemplated that the steps of the present invention, as well as the handrail and balusters, can be configured and fabricated to a design of choice. While the components of the spiral staircase kit can be made of metal or any other sturdy material, it has been found that the use of lightweight wood has several advantages. It is easy to work with and can be fashioned into many different design configurations. The support post and spacer sleeves can be made of plastic or similar PVC type material. Use of such material as components guarantees the lightweight nature of the individual components and the ease of transportability and ultimate assembly and of separability and rotation of the step segments.
It is thus seen that the spiral staircase kit of the present invention results in a spiral staircase which can be assembled to connect adjacent floors in virtually any building space. It is lightweight for assembly purposes and results in a rugged and sturdy staircase unit, whose very weight assists in the stability and rigidity of the staircase. The staircase components are relatively inexpensive and simple to manufacture and are easily assembled and presents an attractive, as well as functional spiral staircase system. The staircase also has the significant added advantage of flexibility in permitting easy altering of its configuration to accommodate space limitations.
Certain novel features and components of this invention are disclosed in detail in order to make the invention clear in at least one form thereof. However, it is to be clearly understood that the invention as disclosed is not necessarily limited to the exact form and details as disclosed, since it is apparent that various modifications and changes may be made without departing from the spirit of the invention.
Claims
1. A spiral staircase kit comprising:
- an elongated support post;
- a plurality of step segments, each step segment comprising: (a) a step surface having a transversly extending length; (b) means for rotatably mounting the step segment substantially around the support post; (c) support means extending downward from and the full transverse length of the step surface to maintain the step segment in a substantially transverse plane in relation to the support post when the step segment is mounted on the support post; and (d) a baluster rail member to be connected to the step surface, said member having attachment means for connecting the baluster rail member to the step surface;
- a plurality of spacer means to be positioned around the support post, one of the plurality of spacer means being located between each of the step segments for supporting the step segments when the step segments are mounted around the support post, each of the step segment support means being in adjacent contact with one of the spacer means when the step segments are mounted around the support post; and
- second attachment means for connecting a baluster rail member of one of the step segments to an adjacently aligned baluster rail member of another step segment, whereby when the second attachment means connects all the adjacently aligned baluster rail members of each step segment to each other, the step segments are rigidly secured around the support post to form a spiral staircase.
2. The spiral staircase kit as in claim 1 wherein the means for rotatably mounting comprises an inboard end section with opening means to receive the support post.
3. The spiral staircase kit as in claim 1 wherein the support means comprises at least one support member extending below the step surface.
4. The spiral staircase kit as in claim 3 wherein the means for rotatably mounting comprises an inboard end section with opening means for receiving the support post.
5. The spiral staircase kit as in claim 1 wherein the plurality of spacer means comprises a plurality of cylindrical sleeves which substantially circumscribe the support post.
6. The spiral staircase kit as in claim 1 further comprising a landing member with means for mounting the landing member substantially around the post.
7. The spiral staircase kit as in claim 1 wherein the second attachment means comprises removeable screw members.
8. A spiral staircase kit comprising:
- an elongated support post;
- a plurality of unitary steps, each unitary step comprising a step surface having a transversly extending length, means for rotatably mounting the step substantially around the support post, and support means extending downwardly from and the full transverse length of the step surface to maintain the step surface in a substantially transverse plane in relation to the support post when the step is mounted on the post;
- a plurality of spacer means to be positioned around the support post, one of the plurality of spacer means to be located between each of the steps for supporting the steps when they are mounted around the support post, each of the support means being in adjacent contact with one of the spacer means when the steps are mounted around the support post; and
- a baluster rail member to be secured to the step surface of each of the plurality of steps, each baluster rail member having first attachment means for connecting the baluster rail member to a step surface and second attachment means for connecting a baluster rail member to an adjacently aligned baluster rail member, whereby when the first and second attachment means are connected, the steps are rigidly secured around the support post and when the first attachment means are connected and the second attachment means are not connected, each step, with its attached baluster rail member, is free to rotate about the support post.
9. The spiral staircase kit as in claim 8 wherein the means for rotatably mounting comprises an inboard end section with opening means to receive the support post.
10. The spiral staircase kit as in claim 8 wherein the support means comprises at least one support member extending below the step surface.
11. The spiral staircase kit as in claim 10 wherein the means for rotatably mounting comprises an inboard end section with opening means for receiving the support post.
12. The spiral staircase kit as in claim 8 wherein the plurality of spacer means comprises a plurality of cylindrical sleeves which substantially circumscribe the support post.
13. The spiral staircase kit as in claim 8 further comprising a landing member with means for mounting the landing member substantially around the post.
14. The spiral staircase kit as in claim 1 wherein the second attachment means comprises removeable screw members.
15. The spiral staircase comprising:
- an elongated support post;
- a plurality of step segments, each step segment comprising: (a) a step surface having a transversly extending length; (b) means for rotatably mounting the step segment substantially around the support post; (c) support means extending downwardly from and the full transverse length of the step surface to maintain the step segment in a substantially transverse plane in relation to the support post when the step segment is mounted on the support post; and (d) a baluster rail member connected to the step surface, said member having attachment means for connecting the member to the step surface;
- a plurality of spacer means positioned around the support post, one of the plurality of spacer means located between each of the step segments for supporting the step segments when the step segments are mounted around the support post, each of the step segment support means being in adjacent contact with one of the spacer means when the step segments are mounted around the support post; and
- second attachment means for connecting a baluster rail member of one of the step segments to an adjacently aligned baluster rail member of another step segment, whereby when the second attachment means connects all the adjacently aligned baluster rail members of each step segment to each other, the step segments are rigidly secured around the support post and when the second attachment means are not connected between baluster rail members, step segments are free to rotate about the support post.
16. The spiral staircase kit as in claim 15 wherein the means for rotatably mounting comprises an inboard end section with opening means to receive the support post.
17. The spiral staircase kit as in claim 15 wherein the support means comprises at least one support member extending below the step surface.
18. The spiral staircase kit as in claim 15 wherein the plurality of spacer means comprises a plurality of cylindrical sleeves which substantially circumscribe the support post.
19. The spiral staircase kit as in claim 15 further comprising a landing member with means for mounting the landing member substantially around the post.
20. The spiral staircase kit as in claim 15 wherein the second attachment means comprises removeable screw members.
Type: Application
Filed: Jun 9, 2008
Publication Date: Oct 2, 2008
Inventor: Harold E. Arnold (Smithfield, NC)
Application Number: 12/157,210