Glide Device and Article of Furniture Incorporating the Same
A glide device for use with various types os structures, which are supported above a support surface by a plurality of legs including a housing, a unitary body, and a resilient member positioned between the housing and the unitary body. The glide device adjustable to a variety of support surfaces to stabilize the furniture thereon
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The present invention relates to a glide device for use with various types of structures which are supported above a support surface by a plurality of legs. More particularly, the present invention relates a glide device, or article of furniture incorporating one or more such glide devices, which can adjust to a variety of support surfaces to stabilize the furniture thereon.
Furniture is manufactured in a variety of different styles and configurations—many of which are functional, but others of which are simply decorative. Certain types of furniture such as chairs, tables, desks, bar stools and the like, include a plurality of legs which normally engage a surface in order to support the furniture thereon. Legged articles of furniture such as these are very prevalent and manufactures attract consumers by constructing them in a variety of appealing designs and configurations.
Furniture is generally designed to be a durable commodity so that its owner may enjoy a significant lifetime of use from it. However, it is often the case—whether due to manufacturing defects, climactic changes, wear and tear or otherwise—that legged articles of furniture in particular can become improperly balanced on their support surfaces. The unfortunate result can be inadvertent damage to either the objects placed on the furniture or the furniture itself. For seated furniture items, inadequate leveling can also result in discomfort or even injury to a user. Of equal concern is the need to avoid damage or abrasion to the support surfaces on which legged structures are placed. For furniture used indoors this support surface is typically either carpeting, wooden floors or tiled floors. For outdoor items such as patio furniture the support surface may be concrete, brick, tile, decking and the like. Regardless of the support surface encountered, one runs the risk that manufacturing imperfections may scratch, tear or otherwise damage the surface. Similar damage may occur when the furniture shifts or slides across the support surface.
In an effort to alleviate these problems, several types of protective devices have been developed. For furniture which is not ordinarily moved, it is common to place a shim(s) or its equivalent under its base (e.g., under one or more of the support legs) in order to balance the furniture on the support surface. For legged items, glide devices have also been used as a means for stabilizing furniture. For example, iron patio furniture is often equipped at the factory with a glide housing in the form of an inverted metal cup which is welded to the distal end of each support leg. The glides themselves are affixed by radial compression and friction to the interior walls of the inverted metal cups. However, as a result of manufacturing defects in the furniture or uneven support surfaces, these glides are not always effective at adequately addressing the aforementioned concerns.
One particular glide device which has been widely used is a cup-like structure formed of a plastic material having an open mouth region received in the confines of the inverted metal cup. The base end of the glide device rests on the support surface when in the mounted state. With this type of construction the glide device tends to assume the orientation of the inverted metal housing. Another problem with this type of glide is the tendency of its sidewalls to fatigue over time. Eventually, the sidewalls become unable to withstand continued compressive loads and crack, perhaps causing further damage. Also, when used on an uneven flooring, plastic cup glide can become distorted and grind into and scratch the support surface. Thus, even though the glide may be temporarily protecting the furniture, it is not protecting its environment.
My U.S. Pat. No. 5,680,673 issued Oct. 28, 1997 addresses such problems by providing an improved glide device for stabilizing legged articles of furniture, while avoiding unnecessary damage to either the support surface or the furniture. To this end, the protective glide device is situated between the support surface and a foot portion of a legged object. The device incorporates a non-abrasive unitary body which is of sufficient thickness to withstand compressive forces of the legged object against the surface, thereby resisting collapse. The unitary body is mountable to the foot portion and has a lower area operative to contact the support surface and an upper area opposite the lower area which is in facing relationship to the foot portion when mounted. Preferably, a resilient member is interposed between the foot portion and the unitary body and operates to conform to contours on a contact surface of the foot portion to stabilize the support leg. Currently available glide devices which are manufactured in accordance with the teachings of my earlier patent use a blended form of ethylene propylene diene methylene (EPDM) as the resilient member. This is a high-density, blended polymer which can be obtained in bulk from a variety of sources, including from Monarch Rubber Co. of Baltimore, Md., as Part No. F-05012.
Glide devices utilizing the blended polymer EPDM as the resilient member have enjoyed much success in the marketplace and have proven to be quite effective at protecting furniture legs and support surfaces. In particular these devices offer stabilization and “self-leveling” characteristics, while additionally providing suitable water resistance. However, despite the numerous advantages afforded by my existing glide device constructions a potential drawback with them is that, after prolonged periods of use under compressive loading, the resilient member has a tendency to remain in its compressed state once the load is removed. In this sense, the resilient member can be considered to exhibit a “memory”. That is, while the furniture might assume a level orientation in one setting, it is unable to subsequently do so in another setting.
While this memory characteristic is of little consequence for stationary items of furniture, it can become an undesirable aspect for furniture which is moved and used on varying support surface contours. The problem is particularly prevalent for furniture which, by design, is intended to support relative heavy loads and be moved with some regularity, e.g., stools, chairs and the like. Such furniture items are particularly susceptible when used in public settings, including bars or restaurants, where they are moved repeatedly. Moreover, it is not uncommon in certain environments for the flooring to have uneven and varying support contours. This is often encountered in older building constructions where the flooring is made from wooden boards, tiles, cobblestone, etc. Not only does the furniture become uncomfortable to the patron in such situations, but there is an inherent risk of injury if it is not properly stabilized. Accordingly, a need remains to improve upon my existing glide device constructions so that they become more adaptable for use with the variety of support surfaces which might be encountered.
SUMMARY OF THE INVENTIONIn accordance with these objectives the present invention, in one sense, relates to a glide device for use with a foot portion of a legged article of furniture to stabilize the furniture on a support surface. One exemplary embodiment of the glide device is adapted for use with a foot portion which incorporates an inverted cup, such as that commonly found on iron patio furniture. The glide device comprises a unitary body configured to be received at least partially within an interior of the inverted cup, and a resilient member for interfacing the unitary body to the inverted cup. The resilient member preferably comprises a pure polymer, closed-cell rubber material. The resilient member could also be a non-hardening, viscous material, such as butyl rubber. Another exemplary embodiment of the glide device incorporates its own housing which is mountable to the foot portion. This embodiment, for example can be used with other types of legged articles of furniture, e.g., tables, chairs, bar stools and the like, the legs of which are not pre-formed to include an inverted cup. When mounted to the foot portion in an assembled state, the inverted cup (or housing) conceals the resilient member and at least some of the unitary body.
The unitary body is preferably constructed of a non-abrasive material. It has an upper surface area in facing relationship to an interior wall of its housing when in the assembled state, and a lower surface area for contacting the support surface. A plurality of cavities are preferably formed in the unitary body, with adjacent ones of the cavities being separated by at least one web element. The unitary body has a continuous, uninterrupted surrounding sidewall, and each of the cavities extends from a respective cavity opening at the upper surface axially toward a continuous, uninterrupted lower surface.
The resilient member has opposed upper and lower surfaces each preferably provided with a layer of adhesive for respectively interfacing the resilient member between its housing and the unitary body. The rubber material from which the resilient member is formed may be ethylene propylene diene methylene (EPDM). Preferably also, the rubber material has a maximum compression set recovery measurement of 35% when subjected to a compression set test conducted in accordance with ASTM D 1056-00. As such, the resilient member exhibits a capability to deform yet substantially return to its pre-compressed configuration. This allows the legged article of furniture on which the glide devices are used to become stabilized on different support surface contours under differing compressive loads.
The present invention also provides an article of furniture as one of its embodiments. The article of furniture comprises a working surface, a plurality of support legs each extending downwardly from the working surface to terminate in a respective foot portion, and a glide device associated with each foot portion. To this end, the article of furniture may assume a variety of configurations, such as a table, a chair, and a bar stool.
The present invention is directed to a glide device which is adapted to stabilize a legged object on a support surface, while at the same time preventing damage to either the legged object or the support surface upon which it rests. The invention is also directed to an article of furniture which is provided with one or more such glide devices. While the invention is particularly described with reference to certain types of furniture, such as tables, stools and chairs, the artisan should readily appreciate that the glide device of the invention can be used with any suitable article of furniture which could benefit from the advantages described herein, although it is contemplated that these will primarily be legged objects. Advantageously, the construction of the glide device enables articles of furniture incorporating such device(s) to be used on different types of support surfaces with different contours, and under different types of load conditions. Thus, the glide device is more adaptable to different use environments as compared to known glide constructions since it has less tendency to retain its compressed configuration once the compressive load is removed.
With initial reference to
A representative foot portion 15(1) for leg 18(1) is shown in
As shown in
Each glide device 20(1)-20(4) is preferably of the same construction. Thus,
Resilient member 40 and unitary body 50 are each sized to be at least partially inserted into housing interior 37. To this end, each of these members 40, 50 has a generally disk-like shape of the same outer diameter d1 which is slightly less than the inner diameter d2 of housing 30. When in the assembled state as shown in
One possible construction for unitary body 50 is shown in
Resilient member 40 is shown in
Each of the adhesive layers 43 and 45 may be protected by relief paper, such as relief paper 47 shown in
For illustrative purposes, resilient member is shown in
To reduce the “memory” effect, resilient member 40 is preferably formed of a pure polymer, closed-cell rubber material such as ethylene propylene diene methylene (EPDM), rather than a blended material. The rubber material has a maximum compression set recovery measurement of 35% (meeting the Suffix B3 requirement) when subjected to a compression set test conducted in accordance with specification D 1056-00 of the American Society for Testing and Materials (ASTM). This specification covers flexible cellular rubber products known as sponge rubbers and expanded rubbers. It is designed to provide certain physical property parameters and test methods for cellular rubber. The compression set test in particular tests the amount, measured in percentage, by which a standard rubber test piece fails to return to its original thickness after being subjected to a standard compressive load or deflection for a fixed period of time. This test is used to determine the quality of rubber compounds and their applicability to certain types of usage. Thus, if a material has good compression set resistance, it will recover sufficiently when the load is released. From a performance standpoint, it is even more preferred that the rubber material have a maximum compression set recover measurement of 25%, thus meeting the Suffix B2 requirement of ASTM D 1056.
It is also preferred that the rubber material be classified as either an ASTM D 1056 2A1 or 2A2 material. This classification contemplates closed-cell rubber (Type 2) in which specific resistance to the action of petroleum based oils is not required (Class A), and with the material having a compression-deflection range from either 2 to 5 psi (Grade 1) or 5 to 9 psi (Grade 2). There are various types of pure EPDM rubber materials which exhibit one or more of these characteristics, such as part numbers 4235-E, 4114-E and 4115-E available from American National Rubber of Ceredo, W.V.
An alternative construction for a glide device according to the first exemplary embodiment is shown in
Housing 130 is shown in
The construction of a representative glide device 220(1) may be appreciated with reference to
Finally, it is contemplated also that the resilient member could be a non-hardening viscous material, such as butyl rubber, which would be responsive to various types of compressive forces. As shown in
Accordingly, the present invention has been described with some degree of particularity directed to the exemplary embodiments of the present invention. It should be appreciated, though, that the present invention is defined by the following claims construed in light of the prior art so that modifications or changes may be made to the exemplary embodiments of the present invention without departing from the inventive concepts contained herein.
Claims
1. A glide device adapted for use with a foot portion of a legged article of furniture to stabilize the article of furniture on a support surface, comprising:
- a. a housing mountable to said foot portion;
- b. a unitary body configured to be at least partially received within said housing; and
- c. a resilient member for interfacing said unitary body to said housing to define an assembled state, said resilient member formed of a pure polymer, closed-cell rubber material.
2. A glide device according to claim 1 wherein said rubber material has a maximum compression set recovery measurement of 35% when subjected to a compression set test conducted in accordance with ASTM D 1056-00.
3. A glide device according to claim 1 wherein said rubber material is classified as an ASTM D 1056 2A1 material.
4. A glide device according to claim 1 wherein said rubber material is classified as an ASTM D 1056 2A2 material.
5. A glide device according to claim 1 wherein said rubber material conforms to one of a B2 and a B3 ASTM D 1056 suffix requirement.
6. A glide device according to claim 1 wherein said rubber material is ethylene propylene diene methylene (EPDM).
7. A glide device according to claim 1 wherein said unitary body is constructed of a non-abrasive body material.
8. A glide device according to claim 1 wherein said body material is an acetyl resin.
9. A glide device according to claim 1 wherein said unitary body has an upper surface area in facing relationship to an interior wall of said housing when in the assembled state, and an opposed lower surface area for contacting the support surface, and wherein said unitary body has a plurality of cavities formed therein, with adjacent ones of said cavities being separated by at least one web element.
10. A glide device according to claim 9 wherein said cavities are spaced equiangularly around a central axis which extends between said upper and lower surface areas.
11. A glide device according to claim 9 wherein each of said cavities has a cavity cross-sectional geometry selected from a group consisting of pie-shaped, rectangular and arcuate.
12. A glide device according to claim 9 wherein said unitary body has a continuous, uninterrupted surrounding sidewall, each of said cavities extending from a respective cavity opening at the upper surface area axially toward the lower surface area.
13. A glide device according to claim 12 wherein said lower surface area is formed as a continuous, uninterrupted surface.
14. A glide device according to claim 1 wherein said resilient member is toroidal in shape and has an associated upper surface for engaging said housing and an associated lower surface for engaging said unitary body.
15. A glide device according to claim 14 wherein each of said upper surface and lower surface of said resilient member includes a layer of adhesive for respectively interfacing said resilient member between said housing and said unitary body.
16. A glide device according to claim 1 wherein said housing is formed as an inverted cup which conceals said resilient member and at least some of said unitary body when said glide device is in the assembled state.
17. A glide device adapted for use with a foot portion of a legged article of furniture to stabilize said foot portion on a support surface, wherein said foot portion includes an inverted cup having a sidewall which surrounds a cup interior, said glide assembly comprising:
- a. a unitary body configured to be received at least partially within said cup interior; and
- b. a resilient member for interfacing said unitary body to said inverted cup, said resilient member comprising a pure polymer, closed-cell rubber material.
18. A glide device according to claim 17 wherein said rubber material has a maximum compression set recovery measurement of 35% when subjected to a compression set test conducted in accordance with ASTM D 1056-00.
19. A glide device according to claim 17 wherein said rubber material is classified as one of an ASTM D 1056 2A1 and 2A2 material and conforms to one of a B2 and a B3 suffix requirement.
20. A glide device according to claim 17 wherein said rubber material is ethylene propylene diene methylene (EPDM).
21. A glide device according to claim 17 wherein said unitary body is constructed of a non-abrasive body material having an upper surface area for facing an interior wall of said inverted cup when in a mounted state, and an opposed lower surface area for contacting the support surface, said lower surface being continuous and uninterrupted.
22. A glide device according to claim 21 wherein said unitary body has a plurality of cavities formed therein, with adjacent ones of said cavities being separated by at least one web element, each cavity extending from a respective cavity opening at the upper surface area axially toward the lower surface area.
23. A glide device according to claim 17 wherein said resilient member has an associated upper surface including an upper layer of pressure-sensitive adhesive for engaging said housing, and an associated lower surface including a lower layer of pressure-sensitive adhesive for engaging said unitary body.
24. An article of furniture, comprising:
- a. a working surface;
- b. a plurality of support legs each extending downwardly from said working surface to terminate in a respective foot portion; and
- c. a glide device associated with each said foot portion, said glide device including: (i) a housing mounted to said foot portion; (ii) a unitary body at least partially received within said housing; and (iii) a resilient member interfaced between said unitary body and said housing to define an assembled state, said resilient member formed of a pure polymer, closed-cell rubber material.
25. An article of furniture according to 24, wherein said article of furniture has a configuration selected from a group consisting of a table, a chair, and a bar stool.
26. An article of furniture according to claim 24 wherein said rubber material has a maximum compression set recovery measurement of 35% when subjected to a compression set test conducted in accordance with ASTM D 1056-00.
27. An article of furniture according to claim 24 wherein said rubber material is classified as an ASTM D 1052 2A1 material.
28. An article of furniture according to claim 24 wherein said rubber material is classified as an ASTM D 1056 2A2 material.
29. An article of furniture according to claim 24 wherein said rubber material conforms to one of a B2 and a B3 ASTM D 1056 suffix requirement.
30. An article of furniture according to claim 24 wherein said rubber material is ethylene propylene diene methylene (EPDM).
31. An article of furniture according to claim 24 wherein said unitary body is constructed of a non-abrasive body material.
32. An article of furniture according to claim 24 wherein said unitary body has an upper surface area facing an interior wall of said housing, and an opposed lower surface area for contacting the support surface, and wherein said unitary body has a plurality of cavities formed therein, with adjacent ones of said cavities being separated by at least one web element.
33. An article of furniture according to claim 32 wherein said unitary body is cylindrically shaped, and wherein said cavities are spaced equiangularly around a central axis which extends between said upper and lower surface areas.
34. An article of furniture according to claim 32 wherein each of said cavities has a cavity cross-sectional geometry selected from a group consisting of pie-shaped, rectangular and arcuate.
35. An article of furniture according to claim 32 wherein said unitary body has a continuous, uninterrupted surrounding sidewall and a continuous and uninterrupted lower surface, and wherein each of said cavities extends from a respective cavity opening at the upper surface area axially toward said lower surface.
36. An article of furniture according to claim 24 wherein said resilient member has an associated upper surface including an upper layer of pressure-sensitive adhesive for engaging said housing, and an associated lower surface including a lower layer of pressure-sensitive adhesive for engaging said unitary body.
37. An article of furniture according to claim 24 wherein said housing is formed as an inverted cup which conceals said resilient member and at least some of said unitary body.
38. An article of furniture according to claim 37 wherein said housing has an aperture formed therethrough, and including a fastening element extending through said aperture to secure said housing to said foot portion.
39. An article of furniture, comprising:
- a. a working surface;
- b. a plurality of support legs each extending downwardly from said working surface to terminate in a respective foot portion; and
- c. a glide device associated with each said foot portion, said glide device including: (i) a housing mounted to said foot portion; (ii) a unitary body at least partially received within said housing; and (iii) a resilient member interfaced between said unitary body and said housing to define an assembled state, said resilient member formed of non-hardening viscous material.
40. An article of furniture according to claim 39 wherein said non-hardening viscous material is butyl rubber.
Type: Application
Filed: Mar 1, 2005
Publication Date: Jun 26, 2008
Applicant: Max-Tech Products, Inc. (Englewood, CA)
Inventor: Burrus D. Beshore (Sedalia, CO)
Application Number: 11/883,030
International Classification: A47B 91/06 (20060101);