Turning – Portable lathe for pipe turning
Patent
1992-11-23
1994-10-04
Terrell, William E.
Turning
Portable lathe for pipe turning
408231, 30 97, B23B 56, B23B 322, B23D 2110
Patent
active
053515870
DESCRIPTION:
BRIEF SUMMARY
P.C.T. INTERNATIONAL APPLICATION
PCT/AU91/00222. As Amended on Jun. 20, 1991 and Apr. 14, 1992.
This invention relates to a cutting tool and, in particular, to a tool adapted to cut plumbing nipples.
Nipples, which are normally lengths of threaded brass pipe are used in a number of applications in plumbing but the most usual of these is for the connection of shower roses and bath filling nozzles and also for the connection of pipes for taps in wash basins, sinks, troughs and the like.
Normally the piping is located by the plumber before tiling is effected and a nipple is left extending outwardly into the area where the connection is to be made, and capped. The tiler locates the tiles around the nipple, cutting the tiles where necessary and after tiling is completed the fitting required is connected to the nipple.
Because the plumber is not necessarily sure as to the depth of the tiles, and their exact location, nipples are invariably left longer than the required length and, in most cases, need to be cut before the fitting is connected thereto.
Conventionally this cutting has been by the use of a hack saw and it will be appreciated that the hack saw normally has to be operated parallel to the surface through which the nipple extends, and relatively close to the surface, and this does mean that cutting the nipples to length is a somewhat tedious job, and it can mean that the tiles or the like can be damaged, at a cost to the plumber.
I have already proposed, in my copending Australian Patent Application, 63193/90 filed Sep. 25, 1989 and entitled "Cutting Tool" a particular form of tool adapted to cut plumbing nipples and this tool has proved very satisfactory in practice.
There are however some situations where my previously designed tool is not fully satisfactory, and that is where the space around the nipple is extremely restricted and, further, the said previous tool may be too expensive for occasional users, such as home handymen.
It is the object of the present invention to provide a cutting tool whereby nipples can readily be cut in situ rapidly and readily and without the likelihood of damage to the surround.
In accordance with the invention I provide a cutting tool having a substantially cylindrical body of a diameter to receive a plumbing nipple through one end thereof, means adjacent that end to clamp the body to the nipple, a cutting tool having at least two cutters located within the body and mounted on a shaft which extends beyond the other end of the body, which cutting tool is adapted for rotation by the shaft which, in turn, can be attached to a power drill or the like so that the nipple can be cut from its outwardly directed end inwardly.
In order that the invention may be more readily understood I shall describe one specific embodiment of the invention in relation to the accompanying drawings in which:
FIG. 1 is a front perspective view of the tool;
FIG. 2 is a sectional side view of the tool showing the location of the tool relative to a surface with the nipple extending further than is required;
FIG. 3 is a view similar to FIG. 2 with the nipple cut;
FIG. 4 is a view along line 44 of FIG. 3 looking at the cutters; and
FIG. 5 is a view along line 55 of FIG. 3 showing the clamping arrangement.
The body 10 is basically cylindrical in form and may be made of any required material but I prefer that it be made of machinable tool steel.
The internal diameter of the bore 11 of the body is designed to be closely received about the nipple 30 to be cut and in one practical size this will be approximately twenty-two millimeters (22 mm).
The total length of the body will depend upon the depth of cut required but in practice I believe a total length of approximately seventy millimeters (70 mm) would be satisfactory for use with a body of this diameter.
Adjacent the end 12 of the body which is adapted to pass over the nipple 30 I provide an enlarged portion 13 which has a split sleeve 14 located therein.
The sleeve 14 can be held in position by a grub screw or the like 15 which can pass through the en
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Schindler Edwin D.
Terrell William E.
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