Electric power cable sheath cutter

Details Electric power cable sheath cutter Electric power cable sheath cutter

1999-10-20

2001-11-06

Rada, Rinaldi I. (Department: 3724)

Cutting

Other than completely through work thickness or through work...

C083S745000, C083S947000, C030S090900

Reexamination Certificate

active

06311600

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to an electric power cable sheath cutter.
2. Description of Prior Art
Power cables are conventionally formed with insulated inner strands surrounded by a metallic sheath which is usually corrugated. In order to terminate, to test, to join and to repair such cables, the outer sheath must be stripped away so that lengths of the inner strands can be exposed, inspected, separated and worked on as required. At present, the stripping is carried out by longitudinally slicing the sheath using a hand chisel and hammer and then peeling back the sheath. This is labor intensive, and also dangerous if the cable is carrying power. There is also a real possibility of damaging the insulation material of the inner strands during slicing even by skilled personnel.
SUMMARY OF THE INVENTION
It is an object of the invention to overcome or at least reduce these problems.
According to the invention there is provided an electric power cable sheath cutter for longitudinally slicing an outer metallic sheath of the power cable having a longitudinal axis, the cutter comprising a frame having two ends each with a clamp that fits to a respective end of a longitudinal section of the cable, a carriage slidingly mounted to the frame arranged to travel longitudinally between the ends of the frame and at least on roller arranged to ride on the section of the cable and to support the carriage in fixed lateral disposition relative to the cable, a cutting tool mounted to the carriage that can be adjusted laterally towards and away from the longitudinal axis of the cable and set to cut a predetermined depth into an outer surface of the cable as the carriage travels from one end of the section to the other.
The at least one roller has a concave periphery against which an outer surface of the cable bears in use. Preferably, there are three rollers evenly distributed around longitudinal axis of the cable, one of which is positioned directly opposite the cutting tool.
The cutter may include an electric motor mounted to the carriage above and connected to drive the cutting tool. The cutting tool may be a milling drill.
An electric motor may be mounted to the carriage and arranged to move the carriage between the ends of the section to enable the slicing to progress automatically.
One or more screwed feeding shafts may be arranged extending between and supported by each end of the frame, together with an endless drive connected between the motor and the shaft and a screwed follower fixed to the carriage that is coupled to the feeding shaft, so that the carriage is moved between the ends of the frame when the motor is operated.
The electric motors are preferably low voltage direct current motors arranged to be supplied from a common portable electrical power supply.


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