Global Patent Index - EP 0996828 A1

EP 0996828 A1 2000-05-03 - HYBRID SCREW

Title (en)

HYBRID SCREW

Title (de)

HYBRIDSCHRAUBE

Title (fr)

VIS HYBRIDE

Publication

EP 0996828 A1 (EN)

Application

EP 98936042 A

Priority

  • CA 9800717 W
  • CA 2211473 A

Abstract (en)

[origin: WO9905420A1] A hybrid screw (S, S'') comprises a flared head (10, 10''), a cylindrical stem (12, 12'') and a distal pointed section (14, 14'') with the flared head (10, 10'') defining a cruciform opening (16, 16''). The cylindrical stem (12) defines a longitudinal inner bore (18) which communicates with the cruciform opening (16) of the head (10) and which defines longitudinal splines (19) adapted to be tapped by a further fastener. A side opening (20) is defined in the cylindrical stem (12) to allow for material cut by the hybrid screw (S) to evacuate through the inner bore (18). First (24, 24'') and second (26, 26'') thread sections of a common thread (22, 22'') extend helically around the cylindrical stem and the distal pointed sectin respectively. The first thread section (24, 24'') is large to firmly engage a friable material such as gypsum, whereas the second thread section (26, 26'') is adapted to cut through gypsum but also to engage a wooden component, such as two by four studs typically found behind gypsum sheets in walls. The hybrid screw (S, S'') which is longer than the thickness of the gypsum sheet can be used at a location in the wall opposite a structural stud thereof, the second thread section (26, 26'') then engaging the wooden member without reducing the axial advancement per rotation of the screw (S, S'') and thus of the first thread section (24, 24'') into the gypsum wall. As both the first and second thread sections have a substantially same pitch, both the cylindrical stem and the distal pointed section will be firmly secured in the gypsum and in the wooden member, respectively.

IPC 1-7 (main, further and additional classification)

F16B 25/00

IPC 8 full level (invention and additional information)

F16B 25/00 (2006.01); F16B 25/02 (2006.01)

CPC (invention and additional information)

F16B 25/00 (2013.01)

Citation (search report)

See references of WO 9905420A1

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

WO 9905420 A1 19990204; AU 8525398 A 19990216; CA 2211473 A1 19990124; EP 0996828 A1 20000503

INPADOC legal status


2003-08-13 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20030201

2001-09-12 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20010730

2000-05-03 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000224

2000-05-03 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE