US4337607A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tongue and groove boards with spacers permitting expansion, and method of making the same
Assignee: Individual
•
Filing: 1980-03-28
•
Granted: 1982-07-06
•
Expires: 2000-03-28
Abstract
Abstract Tongue and groove boards are provided with integral spacers that permit expansion of the assembled boards without buckling, by milling on the bottom of the groove a central longitudinally extending rib of triangular cross section. Spaced portions of the rib, of total length that is most of the length of the board, are then compressed to the level of the bottom of the groove, thereby leaving a series of relatively weak projections which serve to space the boards apart the necessary distance during assembly, but which are not strong enough to resist compression upon expansion of the boards under the influence of moisture or temperature.
Inventors
- 👤 Giovanni Boschetti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:07
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/66; E04B1/68; E04B1/6807
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
111 words
A tongue and groove board having confronting surfaces when assembled with adjacent said boards, having on the bottom of the groove of each said board a plurality of projections which are spaced apart at their bases in the direction of the length of the board and which are of such low mechanical resistance to compression that an assembly of the boards will expand by compressing said projections rather than by buckling, the interval between bases of the projections being greater than the length of the projections in the direction of the length of the board, said intervals having been formed by compression of the material of the board between the projections.
Claim 2
Dependent Claim
111 words
A tongue and groove board having confronting surfaces when assembled with adjacent said boards, having on the bottom of the groove of each said board a plurality of projections which are spaced apart at their bases in the direction of the length of the board and which are of such low mechanical resistance to compression that an assembly of the boards will expand by compressing said projections rather than by buckling, the interval between bases of the projections being greater than the length of the projections in the direction of the length of the board, said intervals having been formed by compression of the material of the board between the projections.
Claim 3
Dependent Claim
16 words
A board as claimed in claim 1, in which said projections are of triangular cross-sectional configuration.
References Cited (Backward Citations)
US158998A
Cited
US2004193A
Cited
US2111003A
Cited
US3566542A
Cited
US3987599A
Cited
US4095913A
Cited
US4265067A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-07-05 | 1986-01-04 | 1986-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-05 | 1990-01-04 | 1990-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-05 | 1994-01-04 | 1994-07-06 | $7700.00 | Window Closed / Lapsed |