Cutting – With work immobilizer – Means to clamp work
Reexamination Certificate
1999-12-16
2001-05-22
Ashley, Boyer (Department: 3724)
Cutting
With work immobilizer
Means to clamp work
C083S862000, C083S471200, C083S477100, C083S490000, C083S564000, C083S597000, C030S090600
Reexamination Certificate
active
06234057
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates generally to cutting apparatus and, in particular to cutters having plural, independent, rotary blades.
BACKGROUND OF THE INVENTION
Electrical cables with spiral-wound, metal casings have always been difficult to prepare for use. As is well known, simply bisecting such a cable at any point, leaves the electrical leads of the cable inaccessibly positioned within the casing. Thus, a portion of the casing, perhaps a foot-long piece, must usually be removed from the end of a cable to permit access to the adjacent leads. To remove a portion of the casing, the cable is doubled back upon itself and the casing is cut with a hacksaw. Not only is the process time-consuming, but it is prone to cause damage to both the skin of an electrician's hands as well as exposed leads when the hacksaw blade slips from its intended path.
SUMMARY OF THE INVENTION
In light of the problems associated with the known methods and apparatus for cutting electrical cables with spiral-wound, metal casings, it is a principal object of the invention to provide a cable cutter that will make three, simultaneous cuts to a cable. One cut is oriented at right angles to the longitudinal axis of the cable and bisects the cable. The other two cuts are shallow, positioned on opposite sides of the first cut, and is oriented parallel to the longitudinal axis of the cable to cut its casing only.
It is another object of the invention to provide a cable cutter of the type described which will accommodate cables of varied length and diameter.
It is a further object of the present invention to provide a cable cutter which may be operated by a single user without special tools or training so as to cut numerous cables with great speed, ease, and precision.
It is an object of the invention to provide improved elements and arrangements thereof in a cable cutter for the purposes described which is lightweight in construction, inexpensive to manufacture, and dependable in use.
Briefly, the cable cutter in accordance with this invention achieves the intended objects by featuring a frame having a base portion with a cable-supporting receptacle and a pivotally-attached, carriage portion. A pair of rip saws are mounted on the carriage portion. Each of the rip saws has a rotating blade for engagement with a cable in the receptacle at an orientation parallel to the longitudinal axis of the cable and receptacle. A crosscut saw is mounted on the carriage portion between the rip saws. The crosscut saw also has a rotating blade for cutting a cable in the receptacle. This latter blade is oriented perpendicular to the longitudinal axis of the cable and receptacle.
The foregoing and other objects, features and advantages of the present invention will become readily apparent upon further review of the following detailed description of the preferred embodiment as illustrated in the accompanying drawings.
REFERENCES:
patent: 967635 (1910-08-01), Hewitt
patent: 2396442 (1946-03-01), Shaver et al.
patent: 2674027 (1954-04-01), Kosinski
patent: 3057240 (1962-10-01), De Witt
patent: 3916763 (1975-11-01), Maroschak
patent: 4567795 (1986-02-01), Pool
patent: 4640007 (1987-02-01), Hydorn
patent: 4709610 (1987-12-01), Pool
patent: 4753144 (1988-06-01), May
patent: 5109899 (1992-05-01), Henderickson
patent: 5176060 (1993-01-01), Thornton
Ashley Boyer
Greiner Stephen R.
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