Improvements in Fump valves.
Year: 1894

page_text: Date of Application, 2nd June, 1894-Accepted, 7th Ju y, 1894
Improvements in Fump valves.
I, CARL MÜLLER, of 24 Frobenstrasse III, Berlin, in the Empire of Germany,
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 :-
The invention relates generally to steam or power pumps working at high speeds
and in which the number of strokes is limited in consequence of the rushing action
of the water in the closing of the valve during the latter part of the outstroke of
the plunger or piston just before reaching the dead point. The rush of the water
through the valve at that time will be more or less strong according to the surface
exposed to it by the valve and according to the position of the latter. It is by the
above mentioned action of the water that the valve at the bottom of the pump
cylinder or water chamber is kept floating for a time after the plunger or piston has
reached its dead point or change of stroke and is thereby prevented from closing or
settling down exactly at the right moment.
The present invention furnishes means to reduce to a minimum the aforesaid rush
of water at the end of the stroke, so as to enable steam or power pumps to be
worked at higher speeds than has been possible hitherto.
For this purpose I provide a special form of valve rings which can be used either
instead of, or in conjunction with, the ordinary valve rings.
The invention is illustrated in the accompanying drawings, in which :-
Figs. 1 to 7 represent various forms of valves provided with my improved valve
rings, while
Fig. 8 is a section on a larger scale of the improved valve ring in conjunction
with a part of the valve and seat so as to show more clearly the construction of said
valve rings and to explain its action.
The construction of the valves shown in Figs. 1 to 6 is as follows:-
a designates the valve seat; a nut connects the spindle c of the valve to the
seat. The valve collar & has a sleeve h for the purpose of guiding the valve on the
spindle c. i are webs which connect the valve collar d with the valve rings v.
The upper part of the spindle c is provided with a nut e for limiting the lift of the
valve, and g is an india-rubber ring between the collard of the valve and the nut e.
The improved rings v which are, according to my invention, used in the present
valve, are particularly illustrated in Fig. 8.
Having regard to the fact that the injurious effect of the rush of the water
increases in proportion with the exposed surface of the valve, and thereby prevents
the timely closing of the latter, I propose to construct the valve rings, according to
the present invention, in such a manner as to reduce the surface of the valve to its
bare contact or seating surface as shown in Fig. 8.
Thus 2a + x = 2 a
x = 0
This arrangement has the advantage not only of reducing the exposed surface,
but also of permitting of the construction of valves with a very small lift or play
by using two or more valve rings of reduced thicknesses.
The form of valves shown by way of example in Figs. 1, 2, 3 and 4, having a
single ring, may obviously be adopted in the construction of valves with a series of
rings. The valve shown in Figs. 5 and 6 is fitted with my improved rings as well
as with an ordinary ring r, and the rings may be either cast together or be
independent of each other.
The invention is also applicable to step valves as represented in Fig. 7.

page_text: It is obvious that the improved valve rings may be provided either with
horizontal or with inclined seating or contact surfaces, as indicated by dotted lines
in Fig. 8.
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 :-
or
1. A pump valve having valve rings used either in conjunction with
independently of the ordinary rings and having their seating or contact surfaces
arranged in such manner as to limit the exposed surface of said valve rings to the
bare covering or contact surface of the seat of the valve, substantially
shown and described.
as herein
2. In pump valves the peculiar construction, arrangement and combination
of parts, substantially as herein shown and described and for the purpose stated.
Dated this 2nd day of June 1894.
CARL MÜLLER,
By Harris & Mills,
23, Southampton Buildings, London, W.C., Agents.