US4713918A — Modular wall system

Claim 1

Independent Claim 452 words

A modular wall system comprising: a wall panel; an elongate base having a substantially uniform cross-section along its length, said base comprising an extruded unitary beam having a web extending from a top flange to a bottom flange, said beam being symmetric with respect to a central plane, said web being coincident with said central plane said beam having a mid-flange located between and spaced from said top and bottom flanges, said flanges extending in substantially parallel relation to each other and substantially perpendicular relation to said central plane, each said flange having two ends spaced substantially equal distance from said central plane, said flanges and said web defining on each side of said central plane a first duct between said top and mid-flange and a second duct between said mid-flange and said bottom flange; means for securing said wall panel to said top flange; said top flange having a lower surface intersecting with said top flange ends to define two edges extending along the length of said beam, said mid-flange having upper and lower surfaces intersecting with said mid-flange ends to define four edges extending along the length of said beam, said bottom flange having an upper surface intersecting with said bottom flange ends to define two edges extending along the length of said beam; for each said edge, said flange surfaces adjacent said edge sloping inwardly toward its respective flange to define a retaining protrusion, said beam including a stop lug for each said protrusion spaced a predetermined distance from said edge to define between each said protrusion and its respective lug a channel; an elongate cover plate for each said duct to provide independent access to each of the four ducts in said base, each cover plate having an interior face, each said face having margin areas extending the length of the plate and abutting said flange ends, each said margin area having a rail extending into said channel between said retaining protrusion and said stop lug of the abutting flange; and for each cover plate and its two associated flanges, said edges of said flanges being spaced a predetermined flange distance, each said cover plate rail protruding from its margin area and having a convex surface, said convex surface including a base adjacent the margin area, an apex, and a tip, said apexes being spaced a predetermined apex distance larger than said flange distance, said base and said tip of one rail being spaced from said base and said tip of said other rail distances less than said flange distance, thereby permitting insertion of said tips between said edges and forcing of said apexes into said channels to retain each said cover plate with respect to its flanges.

Claim 2

Dependent Claim 452 words

A modular wall system comprising: a wall panel; an elongate base having a substantially uniform cross-section along its length, said base comprising an extruded unitary beam having a web extending from a top flange to a bottom flange, said beam being symmetric with respect to a central plane, said web being coincident with said central plane said beam having a mid-flange located between and spaced from said top and bottom flanges, said flanges extending in substantially parallel relation to each other and substantially perpendicular relation to said central plane, each said flange having two ends spaced substantially equal distance from said central plane, said flanges and said web defining on each side of said central plane a first duct between said top and mid-flange and a second duct between said mid-flange and said bottom flange; means for securing said wall panel to said top flange; said top flange having a lower surface intersecting with said top flange ends to define two edges extending along the length of said beam, said mid-flange having upper and lower surfaces intersecting with said mid-flange ends to define four edges extending along the length of said beam, said bottom flange having an upper surface intersecting with said bottom flange ends to define two edges extending along the length of said beam; for each said edge, said flange surfaces adjacent said edge sloping inwardly toward its respective flange to define a retaining protrusion, said beam including a stop lug for each said protrusion spaced a predetermined distance from said edge to define between each said protrusion and its respective lug a channel; an elongate cover plate for each said duct to provide independent access to each of the four ducts in said base, each cover plate having an interior face, each said face having margin areas extending the length of the plate and abutting said flange ends, each said margin area having a rail extending into said channel between said retaining protrusion and said stop lug of the abutting flange; and for each cover plate and its two associated flanges, said edges of said flanges being spaced a predetermined flange distance, each said cover plate rail protruding from its margin area and having a convex surface, said convex surface including a base adjacent the margin area, an apex, and a tip, said apexes being spaced a predetermined apex distance larger than said flange distance, said base and said tip of one rail being spaced from said base and said tip of said other rail distances less than said flange distance, thereby permitting insertion of said tips between said edges and forcing of said apexes into said channels to retain each said cover plate with respect to its flanges.

Claim 3

Dependent Claim 64 words

A modular wall system according to claim 1 wherein at least one duct includes therein wiring for power, said wiring including a male plug at one end of the base and a female plug at the other end of the base for interconnecting the power wiring of adjacent wall systems, said cover plate including at least one power outlet connected to said power wiring.

Claim 4

Dependent Claim 14 words

A system according to claim 2 wherein said beam comprises an extruded aluminum alloy.

Claim 5

Dependent Claim 26 words

A wall system according to claim 5 wherein said margin areas of said cover plates cover at least a portion of the ends of said flanges.

Claim 6

Dependent Claim 59 words

A wall system according to claim 1 wherein said top flange includes a plurality of holes therein, said web immediately beneath each said hole including a cutout, said system further including fastening means extending through said hole upwardly into said wall panel to secure said wall panel to said base, each said cutout permitting access to said fastener means.

Claim 7

Dependent Claim 34 words

A wall system according to claim 1 wherein said bottom flange includes a plurality of threaded holes therein said threaded holes extending into said central web for securement of a leg to said beam.

Claim 8

Dependent Claim 42 words

A modular wall system according to claim 1 wherein each said lug has a terminal end, said lugs being spaced apart a predetermined distance which is less than the distance between the tips of the respective rails of the associated cover plate.

Claim 9

Dependent Claim 59 words

A wall system according to claim 1 wherein said beam has two ends, the web at said ends in the region of the second duct having a recess to provide for an electrical connector flush with the end of the beam and to provide for connection of adjacent modular wall systems in face to face relation to each other.

Claim 10

Dependent Claim 336 words

A modular wall system comprising: a wall panel; an elongate base including a top plate extending the length of the base and a bottom plate extending the length of the base, said plates being supported in spaced parallel relation to each by a plurality of columns secured with respect to said plates, each said plate having an edge extending the length of said plate and including a reinforcing member extending the length of the base and directed into a space between the plates, each said reinforcing member having a terminal edge; a cover extending the length of the base and having a height sufficient to a span a distance between the edges of said top plate and the edges of said bottom plate, each said cover having a pair of rails extending inwardly into the space between the plates, for each said rail, said rail and said terminal edge of said reinforcing member including means for detachably securing said rail to said reinforcing member comprising a protrusion extending the length of each said rail, the distance between said protrusions on said rails of said cover being greater than the distance between the terminal ends of said reinforcing members, said rail and said reinforcing members being resiliently flexible to permit the protrusions to ride over said terminal ends to secure said covers with respect to said top and bottom plates, said assembled base comprising a rectangular box construction wherein the top plate, the bottom plate, and the two covers form sides of said rectangle, to provide a rigid structure; said top and bottom plates and said covers comprising sheet metal, and said reinforcing members comprising a section of the sheet metal bent at an angle between zero and ninety degrees with respect to said top and bottom plates; a divider spaced between said top plate and said bottom plate, said divider extending the length of said base, and including edges abutting said cover; and means for securing said wall panel to said top plate of said base.

Claim 11

Dependent Claim 336 words

A modular wall system comprising: a wall panel; an elongate base including a top plate extending the length of the base and a bottom plate extending the length of the base, said plates being supported in spaced parallel relation to each by a plurality of columns secured with respect to said plates, each said plate having an edge extending the length of said plate and including a reinforcing member extending the length of the base and directed into a space between the plates, each said reinforcing member having a terminal edge; a cover extending the length of the base and having a height sufficient to a span a distance between the edges of said top plate and the edges of said bottom plate, each said cover having a pair of rails extending inwardly into the space between the plates, for each said rail, said rail and said terminal edge of said reinforcing member including means for detachably securing said rail to said reinforcing member comprising a protrusion extending the length of each said rail, the distance between said protrusions on said rails of said cover being greater than the distance between the terminal ends of said reinforcing members, said rail and said reinforcing members being resiliently flexible to permit the protrusions to ride over said terminal ends to secure said covers with respect to said top and bottom plates, said assembled base comprising a rectangular box construction wherein the top plate, the bottom plate, and the two covers form sides of said rectangle, to provide a rigid structure; said top and bottom plates and said covers comprising sheet metal, and said reinforcing members comprising a section of the sheet metal bent at an angle between zero and ninety degrees with respect to said top and bottom plates; a divider spaced between said top plate and said bottom plate, said divider extending the length of said base, and including edges abutting said cover; and means for securing said wall panel to said top plate of said base.

Claim 12

Dependent Claim 49 words

A wall system according to claim 9 wherein each said column comprises a segment extending between said bottom plate and said divider and another segment extending between said divider and said top plate, said column segments being secured together to form said column and to retain said divider therebetween.

Claim 13

Dependent Claim 63 words

A wall system according to claim 10 wherein said one column segment includes a threaded screw and wherein said another column segment includes a threaded aperture, said divider including a hole sized to receive said threaded screw of said one segment, but having a diameter less than the diameter of said another column segment, said column segments, when assembled, retaining said divider therebetween.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1990-12-21	1991-06-22	1991-12-22	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1994-12-21	1995-06-22	1995-12-22	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1998-12-21	1999-06-22	1999-12-22	$7700.00	Window Closed / Lapsed

Modular wall system

Abstract

Inventors

Bibliographic Details

Claims Analysis

References Cited (Backward Citations)

USPTO Annuity & Maintenance Windows

Assigned Categories & Tags

Assign Category Tag