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Publication numberUS2257048 A
Publication typeGrant
Publication dateSep 23, 1941
Filing dateSep 7, 1940
Priority dateSep 7, 1940
Publication numberUS 2257048 A, US 2257048A, US-A-2257048, US2257048 A, US2257048A
InventorsFulbright Clarence C
Original AssigneeFulbright Clarence C
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Ply wood floor block
US 2257048 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

SePt- 23, 1941 c. c. FULBRIGHT FLY WOOD FLOOR BLOCK Filed Sept. "7, 1940 'itat' E] wuz/WM immane fl'arln'f/ s@ 63 www; af W Patented Sept. 23, I941 UNITED STATES PATENT OFFICE PLY WOOD FLOOR BLOCK ClarenceC. Fulbright, Pine Blul Ark.

Application September?, 1940, Serial No. 355,868

3 Claims.

The invention relates to iioor blocks and has as an object the provision of a floor block made from ply wood.

It is an object of the invention to provide a ply wood floor block. provided with tongues and grooves wherein the tongues involve portions of at least two plies.

1t is a further object of the invention to provide a ply Wood floor block in which the grain v shown as formed of five plies IIl I2, I3, Il-and I5 respectively. As shown the vgrain of plies II and I5 at opposite surfaces of the block run in the same direction, which results from the inclusion of an odd number of plies. As a result of such relation -of the direction of grain of wood on the oppositesides of the block, any swelling or shrinkage of the Wood caused by conditions which are common to the two sides,

as changes of humidity before the blocks are laid. will be balanced by the action on the two sides.

As shown the block is formed with tongues I6. Il on two adjacent sides and grooves I8, I9 on the remaining two sides, as is common practice. In accordance with the invention, the tongues involve 'at least two of the adjacent plies, I3 and I4 as shown, as a result of which the danger of splitting off of the tongues is obviated.

Furthermore, in the form of Figures 1 and 2 the portions of the block at each side of the grooves I8 and I9 also each involve at least two plies, for a like reason.

The grooves 20, 2| in the bottom surface of the block are conventional in floor blocks.

'Ihe form of the invention of Figure 3 comprises three layers 22. 23 and 24, the grain of which layers 22 and 24 at opposite surfaces run in the same direction. The tongues I6' (and I1' not shown) of this form of the invention involve the two layers 23 and 24.

The layer 22 which is exposed in the surface of the iioor and is conventionally made of superior material, as shown as thicker than the the tongue and groove by bodily offsetting one of the plies toproject at two edges and inset `at the remaining two. But the soft wood layer at the parallel grain projection, of soft wood, is very vulnerable to handling. By the structure of the present invention each tongue as well as the overhangs of the grooves are made equally strong on each .side of the block.

Minor changes in the physical embodiment of the invention may be made,.within the scope of the claims, without departing from the spirit of the invention;

I claim:

1. A Iioor block comprising in combination: a plurality of plies of wood` united by an adhesive; tongues projecting from two adjacent edges of the block and grooves formed in the remaining edges; each of said tonguescomprising at least portions of at least two of the plies comprising the block; the grain of certain of said plies running at an angle to the grain of an adjacent ply.

2. A floor block comprising, in combination: a plurality of plies of wood united by an adhesive; the grain of alternate plies at an angle of to that of the remaining plies; tongues projecting from two adjacent edges of the block and the remaining edges formed` with grooves; each of said tongues comprising at least portions of at least twoof said plies; material overhanging at least one side of each groove formed of at least portions of at least two of said plies.

3. The structure of claim 1 in which the grain ofthe wood at opposite surfaces of the block runs in the same direction.

CLARENCE C. FULBRIGHT.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2579446 *Apr 27, 1945Dec 18, 1951Erik Dahlberg ErnstBox beam construction for floors
US2668991 *Mar 1, 1949Feb 16, 1954Leon Taphoureau FernandFloor unit
US2782468 *Sep 1, 1954Feb 26, 1957Georgia Pacific Plywood CompanGrooved plywood panel
US2814840 *Feb 8, 1952Dec 3, 1957Us Plywood CorpConstruction material and securing means therefor
US2823433 *Feb 28, 1955Feb 18, 1958Vancouver Plywood CoTongue and groove plywood
US2894292 *Mar 21, 1957Jul 14, 1959Jasper Wood Crafters IncCombination sub-floor and top floor
US6711869 *Jun 29, 2001Mar 30, 2004Kronotec AgMechanically jointing floorboards provided with tongue and groove engagements for horizontal attachment
US20120227346 *Mar 7, 2012Sep 13, 2012Costa TsambasisWall Structure
EP0487925A1 *Oct 31, 1991Jun 3, 1992WASA Massivholzm÷bel GmbHLaminate flooring
WO1997038187A1 *Apr 9, 1997Oct 16, 1997Buchanan I BruceFloorboard made from laminated veneer lumber
WO2012121792A2 *Mar 8, 2012Sep 13, 2012Tsambasis CostaWall structure
Classifications
U.S. Classification52/591.1
International ClassificationE04F15/04
Cooperative ClassificationE04F15/04
European ClassificationE04F15/04