# Patent

## Title
Indented female blow-molded connector and male connector and method

## Abstract

A device and method for forming an indented female connector where the dimension of the indented female connector provides for removing a male molding component without damaging a set of internal ribs formed inside the female connector. A structure comprising an indented female blow-molded connector having a first wall having a top surface and a thickness, with the first wall surrounding an opening. At least one inner wall extends substantially perpendicular to the first wall and borders the opening. At least one rib is formed in the inner wall. A bottom wall is joined to the inner wall and the distance from the rib to the top surface is greater than the thickness of the first wall. The structure further comprising a male connector having a contact edge, such that when positioned inside the indented female blow-molded connector, the contact edge releasably engages the at least one rib.

## Background
BENEFIT CLAIM OF AN EARLIER FILED APPLICATION
This application is a continuation-in-part patent application of patent application Ser. No. 10/314,672, filed Dec. 9, 2002, to Lipniarski for an Indented Female Blow-Molded Connector.


FIELD OF INVENTION
The present indented female blow-molded connector and male connector relate generally to the field of molded plastic parts, and specifically relate to blow-molding a thermoplastic material into the shape of an indented female connector and the shape of a male connector such that the male connector can be joined to the indented female blow-molded connector.
BACKGROUND OF THE INVENTION
Blow molding of plastics to form hollow shapes such as bottles, containers and the like is well known to those having ordinary skill in the art. Some shapes, however, are difficult to mold into a hollow container with a blow molding process. An example of a shape that is difficult to mold is an indented female connector having a set of internal ribs for engaging with a male connector. Accordingly, there is a need for an improved device for molding an indented female connector as part of a hollow object.
Additionally, there is a need for hollow molded objects that can be assembled into sturdy durable structures, such as chairs, tables, stools, walls, and the like, without the need for extra components. There is a need for these structures to be sturdy, so that they can withstand loads imposed on them without breaking or collapsing. There is also a need for the hollow molded objects to be formed such that they can be repeatedly manually joined and released from one another without the use of tools, wrenches, additional components, hammers, screw drivers, and/or power equipment.
SUMMARY
A male mold component is provided and is inserted into a first hollow molded object mold, to thus forming the indented female blow-molded connector in the first hollow molded object. The male mold component can be removed from the first hollow molded object without damaging ribs formed in the indented female blow-molded connector.
After removal of the male mold component, the first hollow molded object has the indented female blow-molded connector formed in a side thereof. There is also a second hollow molded object that has a male side with a male connector extending from the male side. A structure is made from the first hollow molded object and the second hollow molded object when the male connector is moved into and joined to the indented female blow-molded connector.
The indented female blow-molded connector (hereinafter female blow molded connector) has an upper or first wall having a top surface and a thickness, the first wall surrounds an opening. There is at least one inner wall that extends substantially perpendicular to the first wall and that borders the opening. There is also at least one rib formed in the inner wall, and a bottom wall is joined to the inner wall. The bottom wall can be curved. The rib, in an embodiment, can be formed from a pair of rib walls that converge at an approximately forty-five degree angle relative to the inner wall. The distance from the rib to the top surface is greater than the thickness of the first wall.
When the male connector is moved into and positioned internal to the indented female connector, the male connector becomes robustly joined to the indented female connector. This is possible, because the male connector has a contact edge that makes an interference type fit with the at least one rib of the indented female connector. The indented female connector and male connector can be repeatedly manually joined and separated.
The indented female connector and male connector can be used to create of plurality of sturdy, stable structures. The structures can be manually assembled and disassembled without the need for tools, other parts and components, or equipment. The structures that can be formed include stools, tables, chairs, walls, and the like.



BRIEF DESCRIPTION OF THE DRAWINGS
The indented female blow-molded connector and male connector are illustrated in the figures. Like reference characters designate the same or similar parts throughout the figures.
FIG. 1 is a sectional side elevational view of the male mold component positioned inside a portion of the object to be molded.
FIG. 2 is a sectional side elevational view of the indented female blow-molded connector.
FIG. 3 is a sectional side elevational view showing the mold component in broken lines as it is being removed from the indented female blow-molded connector.
FIG. 4 is a perspective view of a first hollow molded object having an indented female blow-molded connector.
FIG. 5 is a top plan view of the first hollow molded object showing the indented female blow-molded connector.
FIG. 6 is a sectional view taken along cut line A-A of the first hollow molded object showing the indented female blow-molded connector.
FIG. 7 is a perspective view of the second hollow molded object from which extends a male connector.
FIG. 8 is a front elevational view of the second hollow molded object showing the male connector.
FIG. 9 is left elevational view of the second hollow molded object showing the male connector.
FIG. 10 is a sectional view of the second hollow molded object showing the male connector taken along cut line B-B.
FIG. 11 is a perspective sectional view of the male connector and indented female blow-molded connector joined together.
FIG. 12 is a sectional view of the male connector and indented female blow-molded connector joined together.
FIGS. 13-15 are perspective sectional views showing, in sequence, the introduction of the male connector into the indented female blow-molded connector.
FIG. 16 is a perspective view of a structure held together with male connectors and indented female blow-molded connectors.
FIG. 17 is a bottom perspective view of the structure held together with male connectors and indented female blow-molded connectors.
FIG. 18 is a perspective view, partly in section, showing a horizontal support member separated from a vertical support member.
FIG. 19 is a bottom perspective view of the horizontal support member separated from the vertical support members.
FIG. 20 is a bottom perspective view of the horizontal support member separated a greater distance from the vertical support members than is shown in FIG. 19.
FIG. 21 is a bottom perspective view of the horizontal support member separated from the vertical support members an even greater distance than shown in FIG. 20.
FIG. 22 is a left perspective view of the horizontal support member separated from the vertical support members.
FIG. 23 is a partly exploded view showing the horizontal support member and a first beam separated from the vertical support members.
FIG. 24 is an exploded view showing the horizontal support member, vertical support members, and the first and second beams.
FIG. 25 is a perspective view, partly in section, of the first beam received in one of the vertical support members.
FIG. 26 is a perspective view, partly in section, of the first beam partly received in one of the vertical support members.
FIG. 27 is a perspective view, partly in section, of the first beam aligned with a recess formed in one of the vertical support members.
FIG. 28 is a front elevation of a four legged stool.
FIG. 29 is a bottom plan view of the seat of the stool.
FIG. 30 is a perspective view of a leg of the stool.
FIG. 31 is a bottom plan view of a three-legged stool.



DETAILED DESCRIPTION
Referring generally to FIGS. 1-3 and initially to FIG. 1, a portion of a first hollow molded object 10 is shown in a sectional side view. The first hollow molded object 10 comprises an indented female blow-molded connector 16, hereinafter indented female connector 16, as shown in FIGS. 2 and 4-6. The first hollow object 10 is formed from thermoplastic materials by blow molding techniques known to those of ordinary skill in the art.
As shown in FIGS. 1 and 3 a male mold component 13 is inserted into the mold to form the indented female connector 16. Once the female connector 16 has been molded, the male mold component 13 is removed from the mold as described hereinafter. It is noted that after the male mold component 13 has been removed, a recess or opening 18 is defined in the first hollow molded object 10, as shown in FIGS. 2 and 4-6.
Referring to FIG. 2, the indented female connector 16 is surrounded by a surface 19. The surface 19 is formed on an upper or first wall 20 that has a thickness indicated at 21. The surface 19 is disposed substantially perpendicular to a set of inside walls 25 extending inward toward a rib 28 that is integrally formed in the inside walls 25 during the molding process. The rib 28 is comprises a pair of converging rib walls 29. Depending on the shape of the opening, the rib 28 may be formed on some or all of the inside walls 25. For a circular opening, the rib 28 may be formed in an annular configuration. For a rectangular opening the rib 28 may extend only along the opposed major lengths of the rectangle, as shown in FIG. 5.
The rib 28 may extend from the inner wall inward at an angle of approximately forty-five degrees. As shown in FIGS. 2 and 5, there is a pair of ribs 28 facing each other and extending inward at approximately a forty-five degree angle from an axis 31 parallel to the inside wall 25. With reference to the orientation of FIG. 2, the side walls 25 may continue downward and join by means of a section 34 disposed at the portion of the female indented connector 16 positioned farthest from the surface 19. Although the section 34 is curved in the drawings, the section 34 may be formed in other shapes as well. For example, the section 34 may comprise a rectangular shape in other embodiments.
Between the top of surface 19 and the rib 28 is a flex section 36 having a dimension 37, as shown in FIG. 2. The distance along the rib is a locking surface 40, and the portion below the rib 28 is a receiving surface 43. The opening between opposed ribs 28 has a dimension 44 that will be described presently.
Turning to FIG. 3, after the blow molding process is completed, the male mold component 13 is removed from the indented female connector 16 by pulling it in a direction substantially perpendicular to top surface 19. The opening or recess 18 in the first hollow molded object 10 is narrowest at the position between the ribs 28, and this is indicated in FIG. 2 as dimension 44. When the male mold component 13 is removed from the formed indented female connector 16 as shown in FIG. 3, the ribs 28 are forced on, and as a result have to bend or flex away from each other in order to accommodate the large diameter 60 of the lower portion 63 of the male mold component 13.
Returning to FIG. 2, it has been discovered that in order to form the ribs 28 and to successfully remove the male mold component 13 without damaging the ribs 28, a certain relationship between thickness 21 of the first wall 20 and the dimension 37 applies. If dimension 37 is greater than thickness 21, then the male mold component 13 can be removed without damaging the ribs 28. If dimension 37 is less than or equal to the thickness 21, the ribs 28 are typically destroyed when the male mold component 13 is removed.
FIG. 4 is a perspective view of the first hollow object 10 having a indented female connector 16 formed therein. FIG. 5 is a top plan view of the indented female connector 16 that shows the ribs 28. And, FIG. 6 is a sectional view taken along cut line A-A of FIG. 5 that shows the indented female connector 16 formed in the first hollow object 10.
A second hollow molded object 11 is provided as shown in FIGS. 7-10. The second hollow molded object 11 comprises a male side 42 and a male connector 30 that extends from the male side 42. It is noted that the second hollow object 11 is formed from thermoplastic materials by blow molding in a manner well known to those having ordinary skill in the art.
As shown in FIGS. 7-10, the male connector 30 comprises a first and second opposed walls 31a and 31b, respectively, that extend substantially perpendicular to the male side 42. Extending from the male side 42 between the first and second oppose walls, 31a, 31b, respectively, are first and second angled walls, 32a, 32b, respectively. The first angled wall 32a is joined with the first and second walls, 31a, 31b, respectively. And, the second angled wall 32b is joined with the first and second walls, 31a, 31b, respectively. A first contact wall 33a extends from the first angled wall 32a, and a second contact wall 33b extends from the second angled wall 32b. 
A curved wall 35 is joined with and extends between the first and second contact walls 33a, 33b, respectively. The curved wall 35 and first contact wall 33a meet at a first edge 38a, and the curved wall 35 and the second contact wall 33b meet at a second edge 38b. The curved wall 35 is also joined with the first and second angled walls, 32a, 32b, respectively. The male connector 30 has a width designated W in FIG. 10. It is noted that in other embodiments the angled walls may be formed such that they are perpendicular to the male side 42 and perpendicular to the first and second contact walls 33a, 33b, respectively.
The above-described indented female connector 16 and the male connector 30 can be manually releasably joined to one another. FIGS. 13-15 show, in sequence, the male connector 30 as it is introduced into the indented female connector 16. The curved wall 35 contacts the ribs 28 that are a distance, designated dimension 44 in FIG. 2 apart from one another. Width, designated W of the curved wall 35 is greater than the distance between the ribs 28. As the curved wall 35 of the male connector 30 is introduced it contacts and forces on the ribs 28. In response, the ribs 28 expand and the curved wall 25 of the male connector 30 moves past the ribs 28. Afterward, the curved wall 35 is adjacent the section 34 of the indented female connector 16 as shown in FIGS. 11 and 12. It is noted that the above-described expansion is similar to the expansion of the ribs 28 shown in FIG. 3, showing the removal of the male mold component 13 from the indented female connector 16.
The male connector 30 is thus joined to the indented female connector 16. In particular, the first and second contact edges 38a, 38b, respectively, of the male connector 30 contact the ribs 28, thus joining or interlocking the male connector 30 to the indented female connector 16 with an interference-type fit. In this manner, the male connector 30 and indented female connector 16 are robustly joined to one another, such that there is a minimal amount of play or space for movement between them when they are so joined together. This advantageously allows for structures 46 that are sturdy and stable to be built from a plurality of first and second hollow molded objects, 10, 11, respectively, that have the above-described indented female connectors 16 and male connectors 30. As will be described presently, there are virtually a limitless number of useful structures 46 may be made from the indented female connector 16 and male connector 30.
Also, the male connector 30 and indented female connector 16 can be manually taken apart or disassembled without the use of tools, equipment, or other parts, pieces, or components. To separate or disassemble, manual force is applied to the male connector 30 and indented female connector 16 in opposite directions. During the separation process, the ribs 28 expand to allow the male component 30 to pass through the ribs 28, and the ribs 28 are not destroyed during the removal process. Advantageously, the male connector 30 and indented female connector 16 can be repeatedly joined and subsequently separated, such that structures 46 that employ the indented female connector 16 and male connector 30 can repeatedly assembled and disassembled.
Another advantage of the releasably joinable indented female connector 16 and male connector 30 is that one person can manually assemble and disassemble structures 46 without the need for other parts and components, without the need for any tools, and without the need for any separate fasteners. Advantageously, there is no possibility of small parts and pieces being lost or misplaced when the present male connector 30 and indented female connector 16 are used to form structures 46. It is noted that the male connector 30 and indented female connector 16 are durable and study. Thus, if a person uses a mallet or hammer made of, for example, rubber, plastic, wood, metal, and combinations thereof to pound the male connector 30 and indented female connector 16 together and/or apart, then the likelihood of the male connector 30 or indented female connector being damaged is low.
FIGS. 17-27 show one of the embodiments of the releasably joinable indented female connector 16 and male connector 30 used to form a structure 46. In particular, shown in FIGS. 17-18 is a structure 46 that can be used as a counter, a table, a bar, a storage surface, a book shelf, or a support for virtually any object(s). Although the structure 46 shown in these drawings could be used for any of a plurality of purposes, structure 46 is, for the sake of convenience, hereinafter referred to as a table 70. The table 70 shown in FIGS. 16 and 17 is constructed from components 68 comprising a horizontal support member 72, a plurality of vertical support members 74, a first beam 76a, and a second beam 76b. 
The horizontal support member 72 has a support side 80 and a connector receiving side 82. Formed in the connector receiving side 82 of the horizontal support member 72 are a plurality of spaced apart indented female connectors 16, as shown in FIGS. 18-21. These indented female connectors 16 are fully described above.
The vertical support members 74 each have a male connector side 84 and a base side 86. Spaced apart male connectors 30 extend from the male connector side 84 as shown in FIGS. 18-25. The male connectors 30 are fully described above.
The first and second beams, 76a, 76b, respectively, are shown in FIGS. 16-27, and are for providing additional stability to the table 70. Each of the first and second beams 76a, 76b, respectively, has a pair of opposed beam sides 78. Formed in the pair of opposed beam sides 78 are a plurality of spaced apart grooves 79. The grooves 79 are aligned with one another on opposite sides 78 of the first beam 76a and on opposite sides of the second beam 76b, as shown in FIG. 25. The vertical supports 74 have openings 92 formed in them and have guides 94 that extend into the openings 92, as shown in FIGS. 25-27.
The table 70 can be constructed by one person in a matter of minutes from the above-described components without the use of tools, hammers, equipment, and/or other parts or pieces. The first step is to align the first and second beams 76a, 76b, respectively, with the openings 92 defined in the vertical supports 74. Then, the first beam 76a is moved into the openings 92, such that the guides 94 are received in the grooves 70. The first beam 76a and vertical support 74 are held together by a friction fit. The same process is used to join the second beam 76b to the vertical supports 74.
Then, the horizontal support 72 is aligned with the vertical supports 74, such that the indented female connectors 16 formed in the connector receiving side 82 side of the horizontal support 72 are aligned with the male connectors 30 extending from the male connector side 84 of the vertical supports 74. Then, pressure or force is applied to the support side 80 of the horizontal support 72, and the male connectors 30 move into the indented female connectors 16. The male connectors 30 and indented female connectors 16 are joined to one another and a sturdy table 70 is thus formed. Some of the advantages of the table 70 are that no tools were required to assemble the table 70, the completed table 70 is rigid and strong, and that the table 70 can be repeatedly disassembled and reassembled. Disassembly of the table 70 is desirable if the table 70 needs to be stored.
In another embodiment, the structure 46 comprises a stool 120 that is held together with male connectors 30 and indented female connectors 16, as shown in FIGS. 28-30. The stool 120 comprises a seat 121 having a load side 122 and a leg side 124. The leg side 124 comprises four indented female connectors 16, as shown in FIG. 29. The indented female connectors 16 are recessed in the leg side 124 of the seat 121. Additionally, the upper or first walls 20 formed in the leg side 124 of the seat 121 that the indented female connectors 16 extend into are angled or sloped with respect to the leg side 124 of the seat 121, such that when legs 130 are joined to the female connectors 16 the legs 130 extend in a direction away from the seat 121. This allows the legs 130 to flare outwardly as shown in FIG. 28, providing for a more stable stool 120.
The legs 130 are each provided with a male connector 30, as shown in FIG. 30, extending from one end thereof. The male connector 30 on each leg 130 is fitted into and joined to one of the indented female connectors 16. The stool 120 is formed when the four legs 130 have each been forced into the indented female connectors 16. One of the advantages of the stool 120 is that no tools, part, pieces, equipment, or loose fasteners were required to assemble the stool 120. Another advantage of the stool 120 is that the stool 120 can be repeatedly manually assembled and disassembled. Another advantage of the stool 120 is that once the male connector 30 on the 130 is fitted into the indented female connector 16, there is little play or room for movement between the two, and a result the stool 120 can support the weight of an adult person without collapsing. In another embodiment, the stool 12 may comprise three legs 120 that spaced at substantially equal distances from one another, as shown in FIG. 31. FIG. 31 shows a bottom plan view of a stool seat that has three indented female connectors 16 for joining to there legs 130.
Thus, a virtually limitless number of structures 46 can be made that make use of the indented female connector 16 and male connector 30. Advantageously, these structures can be manually assembled and disassembled in a short amount of time with the use of tools or other components. More advantages are that these structures 46 are lightweight and can be mass produced at low production costs. Also, these structures 46 are strong and stable, because there is little play or room for movement between the male connector 30 and indented female connector 16 when they are joined together.
There is also a method of making a structure using first and second hollow molded objects, 10, 11, respectively. The method comprises providing the first hollow object 10 with an indented female blow-molded connector comprising 16 having at least one rib 28. Providing the second hollow molded unit with a male connector 30 having first and second contact walls 33a, 33b, respectively, that meet with a curved wall 35 at first and second contact edges 38a, 38b, respectively. The method includes moving the male connector 30 into the indented female connector 16 until the first and second contact edges 38a, 38b, respectively move past the at least one rib 28, thus joining the first and second hollow molded objects, 10, 11, respectively.
While the indented female blow-molded connector and male connector have been described in connection with certain embodiments, it is not intended to limit the scope of the indented female blow-molded connector and male connector to the particular forms set forth, but, on the contrary, it is intended to cover such alternatives, modifications, and equivalents as may be included within the spirit and scope of the indented female blow-molded connector and male connector as defined by the appended claims.

## Claims

1. A structure comprising:
a) a first support member having a first wall having (i) a top surface and (ii) a first thickness, the first support member having at least one indented female connector, the first wall surrounding an opening,
b) the indented female connector has at least one inner wall extending substantially perpendicular to the first wall and bordering the opening,
c) the inner wall has at least one rib,
d) the indented female connector has a bottom wall joined to the inner wall and wherein a distance from the rib to the top surface is greater than the thickness of the first wall and (i) the first wall, (ii) the at least one inner wall, (iii) the at least one rib (iv) the bottom wall and (v) the first support member are one piece,
e) at least one second support member having a male connector side and an opposed base side with a male connector that extends from each of the male connector sides,
f) wherein the male connector is releasably positioned internal to the indented female connector and joined to the indented female connector to join the first support member and the second support member,
g) a first beam having opposed beam sides with grooves that are aligned with one another on opposed sides of the first beam and wherein the second support member has openings with guides that extend into the second support member and the first beam is slidingly received in the openings in the second support member such that the guides are received in the grooves of the first beam and held therein by a friction fit and the guides and the first beam for providing structural stability; and
(h) wherein the first support member is hollow such that the indented female connector extends completely within the first support member.

2. The structure according to claim 1 wherein the male connector has a contact edge and is joined to the indented female connector by an interference fit between the at least one rib and the contact edge.

3. The structure according to claim 1 wherein the second support member is hollow.

4. The structure according to claim 1 wherein the first support member and the second support member are hollow objects.

5. The structure according to claim 4 further comprising a second beam having opposed beam sides with grooves that are aligned with one another on opposed sides of the beam and wherein the second support has openings with guides that extend into the openings and the second beam is slidingly received in the openings in the second support such that the guides are received in the grooves of the second beam and held therein by a friction fit and the guides and the second beam for providing structural stability.

6. The structure according to claim 1 wherein the female connector's opening is round.

7. The structure according to claim 1 wherein the rib is annular-shaped.

8. The structure according to claim 1 wherein the female connector's opening is rectangular.

9. The structure according to claim 8 wherein the at least one rib compromises a pair of opposed rib walls disposed on opposite sides of the rectangular opening.

10. The structure according to claim 1 wherein each of the at least one rib is formed from a pair of rib walls converging at an approximately forty-five degree angle relative to the inner wall.

11. A connector for use with an indented female connector, the connector comprising:
a hollow object having a male side,
a first wall and a second wall that are opposed to one another joined with and extending from the male side,
a first angled wall and a second angled wall each joined with an extending from the male side and each joined with and extending between the first wall and the second wall,
a first contact wall joined with and extending from the first angled wall and a second contact wall joined with and extending from the second angled wall,
a curved wall joined with an extending between the first contact wall and the second contact wall and the curved wall joined with the first wall and the second wall, and
such that the connector is hollow and is releasably received in the indented female connector of a support member wherein the support member has a first wall having (i) a top surface and (ii) a thickness, the first wall surrounding an opening,
b) the indented female connector has at least one inner wall extending substantially perpendicular to the first wall and bordering the opening,
c) the inner wall has at least one rib,
d) the indented female connector has a bottom wall joined to the inner wall and wherein a distance from the rib to the top surface is greater than the thickness of the first wall and (i) the first wall, (ii) the at least one inner wall, (iii) the at least one rib, (iv) the bottom wall and (v) the support member are one piece; and
(e) wherein the first support member is hollow such that the indented female connector extends completely within the first support member.

12. The connector according to claim 11 wherein the first contact wall and curved wall meet at a first contact edge and the second contact wall and curved wall meet at a second contact edge.

13. The connector according to claim 11 wherein the angle that the first angled wall and the second angled wall make with the male side is about ninety degrees.

14. The connector according to claim 11 wherein the indented female connector comprises a rib and wherein the male connector is joined to the indented female connector by an interference fit between the rib and the first contact edge.

15. A structure comprising:
a hollow first support member having a first wall having (i) a top surface and (ii) a thickness, the first support member having an indented female connector, the first wall surrounding an opening, the indented female connector having at least one inner wall extending substantially perpendicular to the first wall and bordering the opening, the inner wall having at least one rib, and a bottom wall joined to the inner wall and wherein a distance from the rib to the top surface is greater than the thickness of the first wall and wherein the first support member and the indented female connector are one piece,
a hollow second support member each having a male connector side and an opposed based side with a male connector that extends from each of the male connector sides, and the male connector having a first wall and a second wall that are oppose to one another, joined with and extending from the male side, a first angled wall and a second angled wall each joined with and extending from the male side and each joined with an extending between the first wall and the second wall, a first contact wall joined with and extending from the first angled wall and a second contact wall joined with and extending from the second angled wall, a curved wall joined with and extending between the first contact wall and the second contact wall and the curved wall joined with the first wall and the second wall, and wherein the male connector is adapted to be releasably received in the indented female connector to join the hollow first and second support member, and
a first beam having opposed beam sides with grooves that are aligned with one another on opposed sides of the beam and wherein the second support member have openings with guides that extend into the openings and the first beam is slidingly received in the openings in the second support member such that the guides are received in the grooves of the first beam and held therein by a friction fit and the guides and the first beam for providing structural stability and wherein the indented female connector extends completely within the first support member.

16. The structure according to claim 15 wherein the male connectors and indented female connector are joined by an interference fit between the at least one rib and the contact edge.

17. The structure according to claim 15 wherein the indented female connectors are spaced apart such that the position where the second support members are connected to the first support member can be selected and wherein the grooves in the first beam are for allowing the position of the first beam relative second members to be selected.

18. The structure according to claim 15 wherein the female connector's openings are rectangular.

19. A table comprising:
a horizontal support member having a connector receiving side,
the connector receiving side including at least one indented female connector having i) a first wall having a) a top surface and b) a thickness, the first wall surrounding an opening, ii) at least one inner wall extending substantially perpendicular to the first wall and bordering the opening, iii) the inner wall having at least one rib, iv) and a bottom wall joined to the inner wall and (a) wherein a distance from the rib to the top surface is greater than the thickness of the first wall (b) and wherein the horizontal support member and (i) the first wall, (ii) the at least one inner wall, (iii) the at least one rib, (iv) the bottom wall are one piece,
one piece vertical supports each having a male connector side having at least one male connector extending from the male connector side and having openings and a first beam slidingly received in the openings, and
wherein the at least one male connector is capable of being releasable received in the at least one indented female connector such that the at least one rib is undamaged, and
wherein the horizontal support member is hollow such that the indented female connector extends completely within the horizontal support member.

20. The table according to claim 19 wherein the first beam has opposed beam sides with grooves that are aligned with one another on opposed sides of the beam and wherein the vertical supports have openings with guides that extend into the openings and the first beam is slidingly received in the openings in the vertical supports such that the guides are received in the grooves of the first beam and held therein by a friction fit and the guides and the first beam for providing the table with structural stability.

21. The table according to claim 19 wherein the at least one male connector has a contact edge and is joined to the at least one indented female connector by an interference fit between the at least one rib and the contact edge of the male connector.