Cutting by use of rotating axially moving tool – Combined cutting means – Including rotating cutter other than rotating – axially...
Patent
1981-09-29
1984-01-17
Combs, E. Michael
Cutting by use of rotating axially moving tool
Combined cutting means
Including rotating cutter other than rotating, axially...
10 87, 10 89P, 10 90, B23G 102, B23G 124
Patent
active
044261780
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a portable pipe cutting and threading device or apparatus with separate drive motors for the cutting unit and the threading unit, wherein both drive motors are mounted on a common support and can be dismantled and carried by one person, and wherein the pipe clamp is placed between the cutting unit and the threading unit.
BACKGROUND OF THE INVENTION
Pipe cutting and threading devices are used for installing pipes in new buildings and for repair work in existing houses. In larger new buildings, the dimensions and the weight of such devices are only of limited importance, since they are used over a relatively long / period of time, normally by several workers.
In the case of less extensive work, e.g., in single family homes, or repair work on existing pipe installations, it is important that the device be small and easy to transport, particularly since such work normally is accomplished by a single worker. This worker should be able to operate the device alone and to transport the device in a passenger car.
For transporting the device by a passenger car, it is particularly important that the device be capable of being dismantled. The dismantling of the device is also important even when it is transported by another type of vehicle, because dismantling makes the device easier to store and avoids the tendency to tip over.
Accordingly, the ability of the device to be easily and quickly dismantled and assembled is of utmost importance.
A known device of the type described above has the following disadvantages:
(a) For the cutting operation, the threading die head must be removed.
(b) The cutting is accomplished by a large circular saw blade.
(c) The cuttting blade does not produce clean edges.
(d) The cut in the pipe is not exact due to the large distance between the vise and the cutting blade and the pipe vibration during the cutting operation. For the same reason, the cutting creates an unpleasant noise.
(e) The drive motor for the threading operation is rather noisy.
(f) The cut edge on the pipe is not clean and requires an additional cleaning operation, e.g., by means of a file.
(g) The device provides only very limited space for storing tools, cutting oils, parts, etc.
BRIEF DESCRIPTION OF THE INVENTION
An object of the present invention is to provide an apparatus for cutting and threading pipe which does not possess the disadvantages listed above.
Another object of the present invention is to provide an apparatus for cutting and threading pipe which can change from the cutting operation to a threading operation, or vice versa, within a very short period of time and by a single manual operation only.
A further object of the present invention is to provide apparatus for cutting and threading pipe with a motor for the threading device having a low noise level and of standard commercial type to prevent noise and limit cost without special designs.
Yet another object of the present invention is to provide an apparatus for cutting and threading pipe providing clean and exact cuts so that no burrs are created which have to be removed in a separate operation.
A still further object of the present invention is to provide an apparatus for cutting and threading pipe with a cutting blade which is as small as possible to minimize the danger of injury and to improve the cutting-accuracy.
Still another object of the present invention is to provide an apparatus for cutting and threading pipe wherein the pipe is firmly held during the cutting operation to reduce vibrations and noise to a minimum and to ensure a perfect cut.
A further object of the present invention is to provide an apparatus for cutting and threading pipe with a single power connection for the cutting and the threading units.
Another object of the present invention is to provide an apparatus for cutting and threading pipe with a supply for cutting oil for the threading operation.
Other objects, advantages and salient features of the present invention will become apparent from the following detailed description of a preferred e
REFERENCES:
patent: 1943643 (1934-01-01), Vosper
patent: 2614435 (1952-10-01), Chasar
patent: 3332095 (1967-07-01), Ivester
patent: 3631552 (1972-01-01), Ivester
patent: 3662414 (1972-05-01), Behnke
Combs E. Michael
George Fischer Ltd.
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