EP 0018329 A1 19801029 - Tongue and groove board with spacers permitting expansion.
Title (en)
Tongue and groove board with spacers permitting expansion.
Title (de)
Brett mit Nut und Feder, versehen mit eine Dilatation zulassenden Abstandselementen.
Title (fr)
Panneau à rainures et languettes avec éléments d'espacement permettant une dilatation.
Publication
Application
Priority
CH 381979 A 19790423
Abstract (en)
Tongue and groove boards (1) are provided with integral spacers (4) that permit expansion of the assembled boards without buckling, by milling on the bottom of the groove (2) a central longitudinally extending rib (4) of triangular cross section. Spaced portions of the rib (4), 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 (4 min , 4 sec , 4''') 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.
IPC 1-7
IPC 8 full level
E04F 13/10 (2006.01)
CPC (source: EP)
E04F 13/10 (2013.01)
Citation (search report)
- US 2110729 A 19380308 - HOGGATT GILBERT A
- FR 2425306 A1 19791207 - PASQUET ROGER [FR]
- US 3987599 A 19761026 - HINES JOHN H
Designated contracting state (EPC)
AT BE DE FR GB IT LU NL SE
DOCDB simple family (publication)
EP 0018329 A1 19801029; EP 0018329 B1 19821201; AT E1915 T1 19821215; CA 1131873 A 19820921; CH 633063 A5 19821115; DE 3061198 D1 19830105
DOCDB simple family (application)
EP 80810131 A 19800418; AT 80810131 T 19800418; CA 350398 A 19800422; CH 381979 A 19790423; DE 3061198 T 19800418