Year: 1899

page_text: Date of Application, 8th Aug., 1899-Accepted, 18th Nov., 1899
In the accompanying drawing:
Fig. I is a perspective view of a breast drill embodying my invention;
Fig. II is a central longitudinal section, partly in elevation and in part broken
away;
Fig. III is a section on the line III-III of Fig. I;
Referring to the figures on the drawings:
1 indicates the cylinder, casing or shell of the motor, which is incorporated
with my tool. In the form illustrated this motor is a fluid-actuated motor, and
the shell is adapted to contain a rotatory piston 2, which fits and works within
the shell. The shell is provided with a removable cylinder head 3, screwed or
otherwise secured to one end of the cylinder. The shell is provided upon one
side with a tubular projection 4 that is preferably integral with the shell. Its
bore 5, constituting an inlet port for the admission of the fluid to the piston
within the cylinder, communicates at one end with the interior of the cylinder.
and at the other end with an enlarged bore 6, within which is fitted the reduced
end 7 of a valve stem 8.
The end 7 of the valve stem is provided at its inner extremity with a valve
recess 9 that in effect constitutes a prolongation of the bore 5, and which, on
one side, communicates through an aperture 10 with a threaded nipple 11,
through which, as by means of a flexible hose, or other means, not illustrated,
the tool may communicate with a source of fluid pressure supply.
Through the rotation of the valve stem 8, pressure may be admitted to the
bore 5 or shut off from it, as required. A set screw 12, working in a transverse
slot 13 in the wall of the projection 4, affords means of limiting the movement
of the valve stem to that necessary to the operation of the valve.
Upon the side of the shell 1, opposite the projection 4, I provide a threaded
nipple 14, whose bore 15, constitutes an outlet port for the shell. The nipple
preferably carries a prolongation, or hollow handle 16.
Opposite the cylinder head 3, is provided a fixed cylinder head or
diaphragm 17, preferably integral with the shell 1.

page_text: The motor proper, consisting of the shell or cylinder, with its head and en-
closed rotatory piston, is of a variety well known in the art, and does not, for
that reason, require further illustration and description.
The piston, at. its opposite ends is provided with trunnions 18 and 19, the
former working in a bushed tubular extension 21, and in the head 3, and the
latter in a bushing 22 provided for it in a suitable aperture in the diaphragm 17.
The end of the tubular projection 21 is perfectly closed by the threaded shank 23
of a breast plate 24..
25 indicates an annular angular flange that preferably constitutes an integral
part of the shell 1. To it, as by screw threads 26, is united the cup-shaped
head 27 of a sleeve 28. The interior of the sleeve is occupied by a close fitting
shank, or tool holder 29, whose conical extremity 30 projects outwardly beyond
its sleeve or casing.
I prefer to provide upon the extremity of the sleeve a hardened metal bearing
cap 31, and opposite thereto upon the shank 29, a corresponding bearing ring 32,
which may be screwed upon the end of the shank, and secured by a lock nut 33.
The opposite faces of the cap 31 and ring 32 are provided, respectively, with suit-
able grooves for the accommodation of bearing balls 34.
Within the cup 27, the shank 29 is provided with a head 35, having an
annular shoulder 36, that works around the interior face of the bore of the
sleeve 29, and which, by aid of the threaded ring 32, may be drawn snugly and
at suitable tension against said face.
The flange 25 and cup 27 constitute, when united, an oil-tight chamber,
which, in practice, is filled with oil adapted to afford, until the supply is
exhausted, ample lubrication to all of the working parts of the machine.
The extensive bearing surfaces, between the sleeve 28, and the shank 29,
afford at one end means for preventing escape from the oil chamber of more
oil than is necessary for the proper lubrication of those surfaces. The bushing 22
prevents any excessive escape, upon the opposite end, of oil.
The head 35 carries upon two suitable bolts 37, respectively, gears 38, which,
meshing upon one side with an internal gear face 39, secured to the flange 25,
constitutes therewith a sun and planet gearing.
The shank 29 is held in perfect axial alignment with the piston 2 by the
reduced end 40 of the trunnion 18, working in a suitable bearing recess provided
for it in the head 35.
Carried by the trunnion IS, and between the trunnion proper and its reduced
end 40 is a fixed pinion 41, which, meshing with the gears 38, communicates
rotation from the piston 2 through the sun and planet gearing to the shank 29.
Having thus fully described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. The combination with a shell enclosing the rotatory piston of a fluid motor,
a sleeve and tool holder shank fitting within the sleeve, of an oil-tight chamber
between the sleeve and the shell, and connected therewith to supply a lubricant
to the bearing surfaces within the sleeve and shell, substantially as set forth.
2. The combination with a shell enclosing the rotatory piston of a fluid motor,
a sleeve and tool holder shank fitting within the sleeve, of an oil-tight chamber
between the sleeve and the shell, and connected therewith to supply a lubricant.
within the shell and the sleeve, and gears operatively uniting the shank to the
piston and working within the chamber, substantially as set forth.
3. The combination with a shell enclosing the rotatory piston of a fluid motor,
trunnions upon the piston working in suitable bearings in the shell, and. an
annular flange upon the shell, of a sleeve, a cup head upon the sleeve secured
to the annular flange of the shell and constituting therewith an oil chamber
connected with the interior of the shell and sleeve, respectively, a tool holder.

page_text: shank working within the sleeve, a head upon the tool holder, a pair of gears
revolubly carried upon the head, an annular gear within the flange intermeshing
with the gears upon the head, and a pinion upon one trunnion of the piston
intermeshing with the head, the gears connecting the tool holder shank and the
trunnion being enclosed within the oil chamber, substantially as set forth.
4. The combination with a shell enclosing the rotatory piston of a fluid motor,
and trunnions working within suitable bearings provided for them in the shell,
a sleeve, and oil chamber between the sleeve and the shell, of a tool holder shank
working within the sleeve, a projection upon one of the trunnions revolubly
fitted coaxially within a recess provided for it in the inner end of the shank,
and gearing operatively uniting the tool holder shank with the piston, said gear-
ing and the projection connecting the shank and trunnion being enclosed within
the oil chamber, substantially as set forth.
5. The combination with a shell enclosing the rotatory piston of a fluid
motor, a sleeve, and intermediate oil chamber operatively communicating with
the interior of the shell and sleeve to supply a lubricant to each, of a tool holder
shank working within the sleeve, gearing within the oil chamber operatively
uniting the piston and the shank, a shouldered head upon the shank within the
oil chamber securing the shank within the sleeve and limiting the flow of oil
between the same, and a nut secured to the outer extremity of the shank and re-
volubly bearing against the end of the sleeve, substantially as set forth.
Dated this 8th day of August 1899.
W. LLOYD WISE,
46, Lincoln's Inn Fields, London, W.C., Chartered Patent Agent.