Buckles – buttons – clasps – etc. – Cord and rope holders – Sliding part or wedge
Patent
1998-09-15
2000-05-09
Brittain, James R.
Buckles, buttons, clasps, etc.
Cord and rope holders
Sliding part or wedge
24115R, F16G 1104
Patent
active
060585749
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND
This invention relates to devices for clamping wires, ropes or cables, being of the type having a body, at least one bore through the body for an end of a wire (or the like, such as a cable, hereafter referred to simply as wire), at least one channel in the body converging at an acute angle and into communication with the bore towards an inlet end of the bore, an abutment at the end of the channel remote from the inlet end of the bore, and a wedge movable along the channel between the abutment and the region of communication with the bore, (and usually with a coil compression spring between the abutment and the wedge) whereby, upon attempted withdrawal of an inserted wire through the inlet end of the bore, the wedge forces the wire into frictional engagement with the wall of the bore opposite the channel.
Tensioning adjustment of an inserted wire can be effected by pulling the wire end emerging from the other (outlet) end of the bore, causing release of the grip of the wedge until that pull is released and the wedge can again exert a force on the wire.
The device with a single bore, channel, abutment, and wedge (with optional spring) may be a terminal device for a wire, or it may be provided with another bore, channel, abutment, and wedge (with optional spring), with the inlet end of the second bore at the opposite end of the body to the inlet end of the first bore, to form a connector for oppositely directed wire ends, and the two bores are preferably disposed in close side-by-side lengthwise relationship, with the regions of communication between the respective channels and bores closely adjacent each other, and with the wall portion therebetween capable of localised distortion under the forces exerted by the wedges through the inserted wires, to increase the frictional contact of the wires with the respective bores and/or allow the wires to come into contact with each other.
OBJECT AND SUMMARY
The object of the invention is to provide a wire (or the like) clamping device (or connector) as described above with means enabling release of the (or either) wedge to allow the wire end (or the respective wire end) to be withdrawn in the opposite direction to that in which it had been inserted.
According to one aspect of the invention, a wire clamping device of the type having a body, at least one bore through the body for an end of a wire, at least one channel in the body converging at an acute angle and into communication with the bore towards an inlet end of the bore, an abutment at the end of the channel remote from the inlet end of the bore, and a wedge movable along the channel between the abutment and the region of communication with the bore, is characterized in that the face of the wedge facing the abutment is provided with an undercut groove, and a hole is provided through the abutment for passage therethrough of a rod-like tool provided with diametrically opposed projections at one end for pulling engagement with the undercut groove by partial rotation of the tool from an insertion position.
When the rod-like tool has been engaged with the wedge it can be pulled to retract the wedge (against the urge of any spring) and release the grip of the wedge on the wire in the bore, whereafter, while the wedge is held retracted by the tool, the wire end can be withdrawn in the opposite direction to that in which it had been inserted, either partially (for positional adjustment) or totally.
The hole in the abutment preferably has a cross-section conforming closely to the cross-section of the end of the rod-like tool with the projections, and preferably has its largest dimension (corresponding to the overall dimension over the projections) aligned with the lengthwise direction of the undercut groove in the wedge, so that upon insertion of that end of the tool into the hole it is automatically aligned with the insertion position into the undercut groove.
The undercut groove in the wedge may have a dovetail cross-section, and the projections on the rod-like tool have a mating angular profile. Alterna
REFERENCES:
patent: 1507316 (1924-09-01), Kemper et al.
patent: 3910546 (1975-10-01), Connors
patent: 3965542 (1976-06-01), Gregory
patent: 4141117 (1979-02-01), Van Gompel
patent: 4706345 (1987-11-01), Rockenfeller et al.
patent: 5090924 (1992-02-01), Pfaller et al.
Facey Hugh David
Shawcross Brian Edward
Brittain James R.
Gripple Limited
Sandy Robert J.
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