US 6,880,307 · Granted 2005-04-19
The Locking Floorboard Patent That Makes Laminate Click Into Place
Imagine a floor made of identical rectangular tiles that lock together like a puzzle—but from all directions at once. This patent describes a clever groove-and-tongue system that lets floor panels snap side-by-side AND end-to-end, so they can't separate even when you walk on them or pull them apart.
The plain-English version
What it protects
The claim covers a panel element design where two long sides have a tongue that slides into an adjacent panel's groove at an angle, and two end sides also feature matching groove-and-tongue connectors that engage when one panel is lowered onto another. What's protected here is the specific geometry and interaction method that prevents panels from separating along both horizontal axes (side-to-side) and from lifting vertically when installed.
Why it matters
This patent locks down a core construction method for modern laminate and engineered wood flooring, which became a massive home-improvement category starting in the 1990s. By securing panels on all four sides simultaneously, manufacturers could ship thinner, cheaper materials that didn't require nails, glue, or underlayment—transforming DIY flooring into something a homeowner could install in a weekend without professional tools.
Real-world use
Every time you click together a laminate floor plank or lay down a floating wood floor in a bedroom, you're using the interlocking mechanism this patent locked down decades ago.
Original USPTO abstract
The invention relates to a panel element for forming a floor covering, consisting of several identical interconnectable panel elements and having the following features: two first sides of each panel element, called the “longitudinal sides”, these sides having a groove and a tongue; the tongue of a panel element which is positioned at an angle with an installation level of a first, identical panel element can be introduced into the groove of the first panel element; the tongue interacts with the groove of the adjacent, identical panel element in such a way that two interconnected panel elements are protected against separating forces which are exerted along both of the axes extending perpendicularly to the longitudinal side of the panel elements; two second sides of the panel element, called the end sides, are provided with fixing means and a groove and tongue, these forming an end-side connection between two adjacent panel elements; the end-side grooves and tongue can be interconnected by means of the panel element being lowered onto an identical panel element that has already been installed, essentially crosswise to the installation level, so that the panel element is protected from lifting forces, i.e. forces which are exerted considerably perpendicularly to the installation level.
Patent details
- Publication number
- US 6,880,307
- Filing date
- 2002-07-10
- Grant date
- 2005-04-19
- Assignee
- Hulsta-Werke Huls Gmbh & Co., Kg
- Inventor(s)
- SCHWITTE RICHARD, MENSING ANSGAR
- CPC class
- E04F15/02
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