Extendible table

1. An extendible table comprising:

a lower load-supporting tabletop having lower-tabletop upper and lower surfaces and at least one lower-tabletop edge;

an upper load-supporting tabletop, slidably overlapping said lower load-supporting tabletop, having:

an upper-tabletop lower surface slidably engaged with said lower-tabletop upper surface;

at least one sliding guide constraining said upper-tabletop lower surface to slide continuously along a sliding extension path traversing at least a portion of said lower-tabletop upper surface;

at least one upper-tabletop edge, less than about 5 mm thick, that traverses at least a portion of said lower-tabletop upper surface as said upper-tabletop lower surface traverses said sliding extension path, said at least one upper-tabletop edge delineating variable overlapping and non-overlapping portions of said lower-tabletop upper surface; and

an upper-tabletop upper surface that forms in combination with said non-overlapping portions of said lower-tabletop upper surface a substantially continuous combined-tabletop surface having an extendible combined-tabletop horizontal dimension that varies continuously as said upper-tabletop lower surface traverses said sliding extension path;

at least one support member affixed to a selected one of said lower tabletop and said upper tabletop to support said combined-tabletop surface in a substantially horizontal position when the extendible table is in use; and

a fixed lateral support member slidably engaged with a lateral-support mount near a proximal end of a selected one of said lower tabletop and said upper tabletop, said extendible table being configured to slide continuously along a sliding lateral path traversing at least a portion of said lateral support member;

wherein said fixed lateral support member is affixed to at least one supportive horizontal or vertical surface via at least one surface mount attached to a portion of said lateral support member traversed by said sliding lateral path, and wherein said lateral-support mount is slotted to slide around said at least one surface mount.

2. The extendible table of claim 1 wherein said at least one lower-tabletop edge comprises two parallel edges that are substantially parallel to said sliding extension path, and wherein said at least one sliding guide comprises at least one flange that depends from said upper tabletop and slides along at least one of said two parallel edges.

3. The extendible table of claim 2 wherein said at least one flange further comprises a sub-flange parallel to said lower-tabletop upper surface and configured to prevent said upper tabletop from tilting as a portion of said upper tabletop is slid to extend beyond said lower tabletop.

4. The extendible table of claim 3 wherein said at least one flange and said at least one sub-flange in combination wrap around said two parallel edges and extend across at least a portion of a lower-tabletop lower surface.

5. The extendible table of claim 2 wherein said sliding extension path runs in a selected one of a straight line and a circular arc.

6. The extendible table of claim 1 wherein said lower tabletop further comprises at least one groove parallel to said sliding extension path, and wherein said at least one sliding guide comprises at least one tongue that depends from said upper tabletop and slides in said at least one groove.

7. The extendible table of claim 1 wherein said at least one support member further comprises a support-member stabilizer rotatably mounted at a lower end of said at least one support member.

8. The extendible table of claim 1 wherein said lateral support member is further pivotably engaged with said lateral-support mount, said extendible table being configured to pivot about said lateral support member between said substantially horizontal position when the extendible table is in use, and a substantially vertical position when the extendible table is not in use.

9. The extendible table of claim 8 wherein said at least one support member is hinged near a distal end of a selected one of said lower tabletop and said upper tabletop, said at least one support member being configured to remain in a substantially vertical disposition, substantially perpendicular to said combined-tabletop when the extendible table is in use, and substantially parallel to said combined-tabletop when the extendible table is not in use.

10. The extendible table of claim 1 wherein said lower load-supporting tabletop is formed primarily from a first material having a first tensile modulus value, and wherein said upper load-supporting tabletop is formed primarily from a second material having a second tensile modulus value at least an order of magnitude greater than said first tensile modulus value.

11. The extendible table of claim 1 wherein said lower load-supporting tabletop is formed primarily from wood or engineered wood, and wherein said upper load-supporting tabletop is formed primarily from sheet metal.

12. An extendible table comprising:

lower supporting means comprising a lower tabletop surface, said lower supporting means being configured for supporting one or more tabletop items on said lower tabletop surface;

upper supporting means comprising an upper tabletop surface, said upper supporting means being configured for supporting said one or more tabletop items on said upper tabletop surface;

sliding means for sliding at least a portion of said upper supporting means across at least a portion of said lower supporting means along a sliding extension path to form in combination a substantially continuous combined-tabletop surface having an extendible combined-tabletop horizontal dimension that varies continuously as said upper supporting means traverses said sliding extension path;

supporting means for supporting said combined-tabletop surface in a substantially horizontal position when the extendible table is in use;

mounting means for slidably coupling said upper and lower supporting means, said sliding means, and said supporting means along lateral sliding means that defines a

lateral sliding path and that is affixed to a supportive horizontal or vertical surface via at least one surface mount, and wherein said mounting means is slotted to slide around said at least one surface mount.

13. The extendible table of claim 12 wherein said mounting means is further configured for pivoting the extendible table between said substantially horizontal position when the extendible table is in use, and a substantially vertical position when the extendible table is not in use.

14. The extendible table of claim 13 further comprising hinge means for disposing said supporting means in a substantially vertical position not only when the extendible table is in use, but also when the extendible table is not in use.

15. The extendible table of claim 14 further comprising support-stabilizing means for stabilizing said supporting means when the extendible table is in use.