Tool for moving a long flexible leading wire through hollow passages
OwnerTord Elverssoninventor
Life of this patent
Estimating the term…
Abstract
This invention relates to a tool for moving a long flexible wire through hollow passages of different kinds. Such tools may be used in connection with the drawing of electric cables in conduits, but also in connection with cleaning or other treatment of conduits having so small dimensions that they are not accessible in another way than by such a wire. The tool comprises two tubes being telescopically movable in relation to each other in order to feed the leading wire. The improvement according to the invention consists in a retaining mechanism designed in such a manner that the tool is capable of feeding the leading wire into as well as out of conduits or the like.
Claims18
Tool for moving a long flexible leading wire through hollow passages, e.g., in order to draw electric cables through hidden conduits or the like, comprising two tubes being telescopically movable in relation to each other and denominated feed tube and guide tube respectively, the feed tube being associated with a retaining mechanism which, on one hand, is arranged to seize the leading wire and firmly connect the same to the feed tube during the displacement thereof in a first direction in relation to the guide tube, but on the other hand, on displacement of the feed tube in an opposite second direction, leave the hold of the leading wire so as to allow the last-mentioned displacement without conveying the leading wire, characterized in that the retaining mechanism comprises at least one locking body having two spaced apart seizing areas and being adjustable into two different working positions or ranges, said locking body, on one hand, in a first working position attending to the conveyance of the leading wire on displacement of the feed tube in the first direction in relation to the guide tube and the release of the leading wire from the engagement with the feed tube on the displacement thereof in the opposite second direction in relation to the guide tube, and on the other hand, in a second working position attending to a conveyance of the leading wire on displacement of the feed tube in said second direction in relation to the guide tube and release of the leading wire from the engagement with the feed tube on displacement thereof in said first direction in relation to the guide tube, whereby the tool can feed the leading wire into as well as out of said passage, the locking body is mounted pivoting about an axis extending across the feed direction of the leading wire and co-operates with an abutment in order to on one hand, allow free relative movement of the leading wire between the locking body and the abutment when the locking body assumes a neutral position of pivoting, in which the two seizing areas of the body are located at approximately equal distances from the abutment, and on the other hand clamp the leading wire between the abutment and either of the seizing areas of said body by the locking body being pivoted about its axis from said neutral position to a seizing position.
Tool for moving a long flexible leading wire through hollow passages, e.g., in order to draw electric cables through hidden conduits or the like, comprising two tubes being telescopically movable in relation to each other and denominated feed tube and guide tube respectively, the feed tube being associated with a retaining mechanism which, on one hand, is arranged to seize the leading wire and firmly connect the same to the feed tube during the displacement thereof in a first direction in relation to the guide tube, but on the other hand, on displacement of the feed tube in an opposite second direction, leave the hold of the leading wire so as to allow the last-mentioned displacement without conveying the leading wire, characterized in that the retaining mechanism comprises at least one locking body having two spaced apart seizing areas and being adjustable into two different working positions or ranges, said locking body, on one hand, in a first working position attending to the conveyance of the leading wire on displacement of the feed tube in the first direction in relation to the guide tube and the release of the leading wire from the engagement with the feed tube on the displacement thereof in the opposite second direction in relation to the guide tube, and on the other hand, in a second working position attending to a conveyance of the leading wire on displacement of the feed tube in said second direction in relation to the guide tube and release of the leading wire from the engagement with the feed tube on displacement thereof in said first direction in relation to the guide tube, whereby the tool can feed the leading wire into as well as out of said passage, the guide tube has a curved or bent frontal extremity in order to provide at least a slight friction between the guide tube and the leading wire passing therethrough, thereby ensuring that the leading wire is not unintentionally moved on the return movement of the feed tube after a feeding movement, the frontal extremity of the guide tube is provided with a friction-increasing lining on the inner side thereof.
Tool for moving a long flexible leading wire through hollow passages, e.g., in order to draw electric cables through hidden conduits or the like, comprising two tubes being telescopically movable in relation to each other and denominated feed tube and guide tube respectively, the feed tube being associated with a retaining mechanism which, on one hand, is arranged to seize the leading wire and firmly connect the same to the feed tube during the displacement thereof in a first direction in relation to the guide tube, but on the other hand, on displacement of the feed tube in an opposite second direction, leave the hold of the leading wire so as to allow the last-mentioned displacement without conveying the leading wire, characterized in that the retaining mechanism comprises at least one locking body having two spaced apart seizing areas and being adjustable into two different working positions or ranges, said locking body, on one hand, in a first working position attending to the conveyance of the leading wire on displacement of the feed tube in the first direction in relation to the guide tube and the release of the leading wire from the engagement with the feed tube on the displacement thereof in the opposite second direction in relation to the guide tube, and on the other hand, in a second working position attending to a conveyance of the leading wire on displacement of the feed tube in said second direction in relation to the guide tube and release of the leading wire from the engagement with the feed tube on displacement thereof in said first direction in relation to the guide tube, whereby the tool can feed the leading wire into as well as out of said passage, the guide tube in the vicinity of its frontal extremity has a collar serving as a front stop for the feed tube and suitably also as a grip portion for one of the operator's hands.
Tool for moving a long flexible leading wire through hollow passages, e.g. in order to draw electric cables through hidden conduits or the like, comprising two tubes being telescopically movable in relation to each other and denominated feed tube and guide tube respectively, the feed tube being associated with a retaining mechanism which, on one hand, is arranged to seize the leading wire and firmly connect the same to the feed tube during the displacement thereof in a first direction in relation to the guide tube, but on the other hand, on displacement of the feed tube in an opposite second direction, leave the hold of the leading wire so as to allow the last-mentioned displacement without conveying the leading wire, characterized in that the retaining mechanism comprises at least one locking body having two spaced apart seizing areas and being adjustable into two different working positions or ranges, said locking body, on one hand, in a first working position attending to the conveyance of the leading wire on displacement of the feed tube in the first direction in relation to the guide tube and the release of the leading wire from the engagement with the feed tube on the displacement thereof in the opposite second direction in relation to the guide tube, and on the other hand, in a second working position attending to a conveyance of the leading wire on displacement of the feed tube in said second direction in relation to the guide tube and release of the leading wire from the engagement with the feed tube on displacement thereof in said first direction in relation to the guide tube, whereby the tool can feed the leading wire into as well as out of said passage, the guide tube has an aperture in the tube wall for the insertion of one or more cables or the like into the guide tube for simultaneous feeding of the leading wire and the cable out of the output orifice of the guide tube.
Dependencies are inferred from the claim text.