Tether roller apparatus
A cost-effective, lightweight, and easily attachable/detachable cable tether apparatus to increase the run distance of a tether cable thereby overcoming factors such as pipe geometry and cumulative pipe bend angle. The apparatus includes two clamshell-like wheels pivotably joined about a hinge with a quick-release mechanism configured for selectively locking and unlocking the apparatus at varied intervals along the tether cable. The tether cable being releasably affixed to the apparatus at a location offset below the axis of rotation of the wheels.
1 . A tether roller apparatus for maintaining a tether at a distance from a curved surface, the apparatus comprising:
a pair of semi-spherical wheels;
a female axle portion rotatably coupled to one of the pair of semi-spherical wheels;
a male axle portion rotatably coupled to another of the pair of semi-spherical wheels; and
a hinge for pivotably coupling the female axle portion and the male axle portion;
wherein the female axle portion and the male axle portion are movable about the hinge between a locked position thereby immovably engaging a tether and an unlocked position thereby disengaging the tether.
2 . The apparatus as claimed in claim 1 , further including a tether retaining section formed by the female axle portion and the male axle portion.
3 . The apparatus as claimed in claim 2 , wherein the tether retaining section is a grip layer comprised of a non-slip material.
4 . The apparatus as claimed in claim 3 , wherein the female axle portion includes at least one cavity and the male axle portion includes at least one barb mounted at an end of an extension, the at least one barb releasably connecting with the at least one cavity.
5 . The apparatus as claimed in claim 4 , wherein the pair of semi-spherical wheels are separated by a gap, and the at least one extension is accessible via the gap by a user of the apparatus.
6 . The apparatus as claimed in claim 5 , wherein the tether retaining section is offset from an axis about which the pair of semi-spherical wheels rotate.
7 . The apparatus as claimed in claim 6 , wherein the male axle portion includes a first barb mounted at an end of a first extension and a second barb mounted at an end of a second extension and, correspondingly, the female axle portion includes a first cavity and a second cavity, where the first barb and the first cavity when connected to one another are located opposite the axis from the second barb and the second cavity when connected to one another.
8 . The apparatus as claimed in claim 7 wherein the first extension and the second extension are compressible by a thumb and forefinger of the user to enable a change of the apparatus from the locked position to the unlocked position.
9 . The apparatus as claimed in claim 8 wherein the first extension and the second extension are each laterally located on the male axle portion.
10 . The apparatus as claimed in claim 8 wherein the extensions are formed from a flexible material.
11 . The apparatus as claimed in claim 8 wherein a change of the apparatus from the unlocked position to the locked position is accomplished via snap-fitting action of the barbs within their corresponding cavities.
12 . The apparatus as claimed in claim 8 wherein the tether retaining section is integrally formed with surfaces of the female axle portion and the male axle portion.