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US 6,602,019 B1Granted
Device for fixing, tensioning or pulling an extensible traction element, in particular, a cable
OwnerChristian Rikli, Fritz Feuzinventors
Life of this patent
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Abstract
The device has two supports (15, 16) which can be moved in relation to each other in a transverse direction to the axis (2) of the traction element (1). Several clamping jaws (19, 20) are displaceably mounted in pairs opposite each other on said supports. The clamping jaws (19, 20) have surfaces which grasp the traction element (1). When strain is placed on the traction element, the clamping jaws are displaced linearly at increasing distances except for the rear pair, in such a way that the clamping force can be evenly distributed over a great length, despite the extension of the traction element (1). This allows, for example, steel cables with a high traction force to be tensioned without damaging the cable.
Claims20
Device for fixing, tensioning or pulling an extensible traction element (1), comprising
- supports (15, 16) movable toward each other transverse to a longitudinal axis (2) of the traction element (1),
- a plurality of pairs of clamping jaws (19, 20) arranged mutually opposite on the supports (15, 16) one behind another in a direction of the axis (2) of the traction element (1) whereby two adjacent pairs of said clamping jaws (19,20) are spaced an initial distance from one another,
- said clamping jaws (19,20) having engagement surfaces for engaging the traction element (1) along a substantial length of said clamping jaws in said direction of said axis (2), and wherein said clamping jaws (19,20) are adapted to tightly grip the traction element (1) to prevent substantial axial movement of the traction element (1) relative to the clamping jaws (19,20),
- a majority of the clamping jaws (19, 20) being displaceable in the direction of the axis (2) from a basic position on the supports (15, 16) away from a rearmost pair of said clamping jaws (19,20), and
- wherein in operation under load of the traction element (1) and consequent elongation of the traction element (1), adjacent pairs of said clamping jaws (19,20) move away from one another in the direction of said axis (2) so that a second distance between said two adjacent pairs of said clamping jaws (19,20) after said elongation becomes greater than said initial distance.
2 more elements
The device according to claim of 2, wherein said difference between initial and second distance of the clamping jaws (19, 20) from a basic position to a corresponding top (21) is adjustable.
Device for fixing, tensioning or pulling an extensible traction element (1), comprising
- supports (15, 16) movable toward each other transverse to a longitudinal axis (2) of the traction element (1),
- a plurality of pairs of displaceable clamping jaws (19, 20) arranged mutually opposite on the supports (15, 16) one behind another in a direction of the axis (2) of the traction element (1),
- a rearmost pair of fixed clamping jaws,
- said displaceable clamping jaws (19, 20) and said rearmost pair of fixed clamping jaws having engagement surfaces for engaging the traction element (1) along a substantial length of said clamping jaws in said direction of said axis (2), and wherein said displaceable clamping jaws (19, 20) and said rearmost pair of fixed clamping jaws are adapted to tightly grip the traction element (1) to substantially prevent axial movement of the traction element (1) relative to the clamping jaws,
- wherein the displaceable clamping jaws (19, 20) are displaceable in the direction of the axis (2) from a basic position on the supports (15, 16) away from said rearmost pair of fixed clamping jaws (19, 20), and
- wherein in operation under load of the traction element (1) and consequent elongation of the traction element (1), each pair of said displaceable clamping jaws (19, 20) moves away from said rearmost pair of fixed clamping jaws and from any pair of displaceable clamping jaws (19, 20) in between, while said pairs of displaceable clamping jaws (19,20) continue to tightly grip the traction element (1).
3 more elements
Device for fixing, tensioning or pulling an extensible traction element (1), comprising
- supports (15, 16) movable toward each other transverse to a longitudinal axis (2) of the traction element (1),
- a plurality of pairs of displaceable clamping jaws (19, 20) arranged mutually opposite on the supports (15, 16) one behind another in a direction of the axis (2) of the traction element (1),
- a rearmost pair of fixed clamping jaws,
- said displaceable clamping jaws (19, 20) and said rearmost pair of fixed clamping jaws having engagement surfaces for engaging the traction element (1) along a substantial length of said clamping jaws in said direction of said axis (2), and wherein said displaceable clamping jaws (19, 20) and said rearmost pair of fixed clamping jaws are adapted to tightly grip the traction element (1) to substantially prevent axial movement of the traction element (1) relative to the clamping jaws,
- wherein the displaceable clamping jaws (19, 20) are displaceable in the direction of the axis (2) from a basic position on the supports (15, 16) away from said rearmost pair of fixed clamping jaws (19, 20),
- wherein in operation under load of the traction element (1) and consequent elongation of the traction element (1), each pair of said displaceable clamping jaws (19, 20) moves away from said rearmost pair of fixed clamping jaws and from any pair of displaceable clamping jaws (19, 20) in between, while said pairs of displaceable clamping jaws (19, 20) continue to tightly grip the traction element (1), and
- wherein a maximum displacement stroke (22) of each displaceable clamping jaw (19, 20) is larger than the maximum displacement stroke (22) of any preceding displaceable clamping jaw (19, 20) closer to the rearmost pair of clamping jaws.
4 more elements
A device for fixing, tensioning or pulling an extensible traction element (1), comprising
- supports (15, 16) movable toward each other transverse to a longitudinal axis (2) of the traction element (1),
- a plurality of pairs of displaceable clamping jaws (19, 20) arranged mutually opposite on the supports (15, 16) one behind another in a direction of the axis (2) of the traction element (1),
- a rearmost pair of fixed clamping jaws,
- said displaceable clamping jaws (19, 20) and said rearmost pair of fixed clamping jaws having engagement surfaces for engaging the traction element (1) along a substantial length of said clamping jaws in said direction of said axis (2), and wherein said displaceable clamping jaws (19, 20) and said rearmost pair of fixed clamping jaws are adapted to tightly grip the traction element (1) to substantially prevent axial movement of the traction element (1) relative to the clamping jaws,
- wherein the displaceable clamping jaws (19, 20) are displaceable in the direction of the axis (2) from a basic position on the supports (15, 16) away from said rearmost pair of fixed clamping jaws (19, 20),
- wherein in operation under load of the traction element (1) and consequent elongation of the traction element (1), each pair of said displaceable clamping jaws (19, 20) moves away from said rearmost pair of fixed clamping jaws and from any pair of displaceable clamping jaws (19, 20) in between, while said pairs of displaceable clamping jaws (19, 20) continue to tightly grip the traction element (1), and
- wherein the displaceable clamping jaws (19, 20) are displaceable on surfaces (17, 18) of the supports (15, 26) which are substantially parallel to the axis (2) of the traction element (1).
4 more elements
Dependencies are inferred from the claim text.