Year: 1889

page_text: I, OTTO RICHTER, of Meissen, in the Kingdom of Saxony and German Empire,
Engineer do hereby declare the nature of this invention and in what manner the
same is to be performed, to be particularly described and ascertained in and by the
following statement :-
My invention relates to valves, and more particularly to an improved method of
packing the stem of the same.
The object of my invention is to do away with the difficulties experienced in the
use of valve-packings as heretofore constructed, such packings consisting generally in
the combination, with the stem of the valve, of a stuffing-box and mineral or vegetable
fibre applied in a well-known manner, but having the disadvantage both of being
easily rendered loose and of rendering difficult the handling or operation of the valve
by reason of the existing comparatively large area of friction-surfaces since, apart
from the stuffing box, a separate nut arranged outside the valve chamber, had to be
employed for effecting the motion of the valve-stem.
My said invention dispenses with the stuffing box for the valve-stem and allows of
arranging the actuating nut within the valve-chamber and near the valve so as to
ensure a better and easier operation of the latter.
In the accompanying drawing
Figure 1 is a vertical longitudinal section illustrating my improved valve in its
closed position and
Figure 2 is a similar view showing the said valve open.
c is a flexible annular disc or plate preferably consisting of rubber or other elastic
and impermeable material encircling the valve-stem b and arranged adjacent to the
surface of the body a of the valve. The latter is preferably formed with a collar a
offering a suitable bearing surface for the flexible disc c which is held firmly in close
contact with the outer surface of the said collar by a sleeve b¹ on the valve-stem, and
thus forms a perfectly tight packing for the latter.
The outer periphery of the disc c rests upon an annular or correspondingly shaped
shoulder of the valve-chamber d and is pressed tightly against it by the nut f forming

page_text: a removable part or cover of the said chamber and fastened thereon by bolts or other
means not shown, so that a thoroughly reliable packing between the chamber d and its
cover is likewise ensured by the flexible disc o.
The threaded part e of the valve stem b works in the part or nut ƒ so that by
turning the said stem by means of its handle, the body a of the valve will be raised
from its seat or pressed upon the same, the flexible disc c following all these respective
movements without failing to fulfil its functions of establishing a permanent and
perfect packing of the valve stem and, at the same time, between the chamber d and
its threaded part or cover f.
Having now particularly 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-
-
First. In a valve the combination, with the body of the valve, of a flexible plate
arranged between the said valve-body and the valve-chamber, substantially as, and for
the purposes, specified.
Second. In a valve the combination, with the body of the valve, of a threaded
valve-stem working with its threaded part in the correspondingly threaded part of the
valve-chamber and passing through a flexible plate, substantially as, and for the
purposes, specified.
Third. In a valve the combination, with the body of the valve, of a valve-stem
carrying a sleeve, and a flexible plate arranged between said sleeve and the outer
surface of the said body of the valve, substantially as, and for the purposes
specified.
Fourth. In a valve a packing consisting of a flexible plate e arranged between a
sleeve of the valve-stem-b-and-the-outer surface a' of the body a of the valve,
substantially as, and for the purposes, specified.
D
1
T
3000