E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 23/14 (2006.01) E21B 31/20 (2006.01)
Patent
CA 2496425
A spearhead assembly (10) comprises a base (12) provided with a slot (14) at one end (16) which opens onto an outer surface (13) of the base (12). The outer surface (13) is composed of three contiguous surface portions (18, 20 and 22). A spearpoint (20) is pivotally coupled at its proximal end (26), which is disposed in the slot (14), to the base (12). A distal end (28) of the spearpoint (24) extends or projects beyond the slot (14) and the surface (13) of the base (12). A spearpoint positioning system (30) urges the spearpoint (24) toward one of three annually spaced positioned. These positions are characterised by the spearpoint (24) extending substantially perpendicular to parallel opposed edges of the slot (14) which open onto, or are flanked by, the surface portions (18), (20 and 22). Moving the spearpoint from one position to another requires the application of an external force.
L'invention concerne un ensemble harpon (10) qui comprend une base (12), munie d'une fente (14) à une extrémité (16) débouchant sur une surface externe (13) de la base (12). Ladite surface (13) comprend trois parties contiguës (18, 20 et 22). Une pointe de harpon (20) est couplée pivotante en son extrémité proximale (26), placée dans la fente (14), avec la base (12). Une extrémité distale (28) de cette pointe (24) sort de la fente (14) et de la surface (13) de la base (12). Un système de positionnement de pointe de harpon (30) pousse la pointe (24) vers l'une des trois positions prévues, qui sont espacées de façon annulaire. Dans ces positions, la pointe (24) a une extension sensiblement perpendiculaire aux bords parallèles opposés de la fente (14) débouchant sur les parties de surface (18), (20 et 22) ou étant flanquées par elles. Le déplacement de la pointe d'une position à l'autre suppose l'application d'une force externe.
Beach Andrew
Mcleod Gavin
2ic Australia Pty Ltd
Borden Ladner Gervais Llp
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