Metal working – Plural diverse manufacturing apparatus including means for... – Type of machine
Reexamination Certificate
1999-08-10
2001-10-02
Briggs, William (Department: 3722)
Metal working
Plural diverse manufacturing apparatus including means for...
Type of machine
C029S560000, C228S048000, C408S238000, C409S231000
Reexamination Certificate
active
06295707
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a portable boring—welding machine, of the type used to restore the original dimensions of holes or seats for knuckle pins, rotation bushings, etc., on machines or machine parts, without having to transport the part to be machined to the workshop and without positioning the part on machine tools.
Machines of this type are already known on the market. The Applicant has, for many years, manufactured and sold a boring machine, marketed with the “bimotor plus” trademark, in which the tool axle/shaft and the torch axle/shaft are driven by two different motors or drive units, specifically dedicated to driving one (at high speed) and the other (at low speed). The two motors, or drive units, are connected, with different timing, to a unit which transmits the motion to the shafts. Said unit is supported inside the self-supporting machine structure. A third motor, or drive unit, is envisaged for obtaining an axial movement of the tool and torch axles/shafts.
In the known machines, the three drive units, as described above, are housed in a box-shaped part of the machine, connected to the self-supporting structure. This box is shaped in such a way that it has, or may be fitted with, a handle for manual transportation of the machine.
The use of three motors and the relative transmissions means that the dimensions of the above-mentioned box are significant and the machine heavy. Since it must be transported manually, it should, instead, be functional and at the same time very light.
SUMMARY OF THE INVENTION
The aim of the present invention is to provide a boring machine of the above-mentioned type, in which the rotation of the tool or torch shafts and, respectively, the axial movement in either direction, of said shafts, are powered by only two independent motors, in combination. The two motors can be activated from the machine control unit and are both housed in the same machine box with a carry-handle. At least the motor designed to rotate the tool and torch shafts is a direct current motor and is subject to the action of means which adjust its speed and stroke, respectively positioned on the control panel of the control unit and at end of stroke means which can be intercepted by actuators which follow the axial movement of the tool and torch shafts.
Experiments have indicated that this motor combination provides optimum adjustment of the speed of the tool and torch axles/shafts, with a small reduction in the number of transmission means until now necessary for the above-mentioned drive and, advantageously, a reduction in the overall weight of the machine. In addition, machine assembly is facilitated and the machine is, overall, economical to make, thanks to its simplified operating shaft drive system.
REFERENCES:
patent: 2820420 (1958-01-01), Hayes
patent: 4550235 (1985-10-01), Füwesi
patent: 4873419 (1989-10-01), Acheson
patent: 4932427 (1990-06-01), McVicker
patent: 5350259 (1994-09-01), Russo
patent: 6073322 (2000-06-01), Russo
patent: 58-179564 (1983-10-01), None
patent: SU-A-173111 (1964-12-01), None
Briggs William
Fay Sharpe Fagan Minnich & McKee LLP
Sir Meccanica S.r.l.
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