Improvements in and relating to Pump Valves.
Year: 1895

page_text: Date of Application, 25th June, 1895
Complete Specification Left, 20th Mar., 1896-Accepted, 16th May, 1896
PROVISIONAL SPECIFICATION.
Improvements in and relating to Pump Valves.
I, DETLEV WULFF, of 13 Brook Street Bremen, Germany, Engineer, do
hereby declare the nature of this invention to be as follows:-
My invention relates to improvements in the construction and arrangement of
pump valves and valve seats in a simple manner.
In carrying out my invention with valves such as the valves of feed pumps, the
valves are preferably multiple, each being in the form of a thin annular ring of
brass, copper, or other suitable material either cut from a rolled sheet or cast and
arranged one above the other. Each valve has an independent valve seat the seats
being arranged to fit into each other, the whole forming a suitable construction for
retaining the valves. For example, the lower seat may be in the form of a double
ring the distance between the two rings being the passage for the liquid and the
upper faces of the rings the portion on which the annular valve rests.
The inner ring has upward extensions or brackets on its inner edge, the outer
diameter of such extension forming the guide for the annular valve and the inner
diameter being made to receive the seat of the valve next above which also forms
the guard for the lower valve. If the upward extension on the seat is in the form
of a solid ring then the valve has only one opening, viz., outwards; but if the
extensions are in the form of brackets then the valve may have two openings.
The guard of the upper valve forms the top of the structure and the whole is held
together by a central pin or bolt or in any other suitable manner.
The valves may
be of any section and may be fitted with a cushioning metallic corrugated ring or
with suitable springs.
Dated this 24th day of In 1905
простению знаци геланцюгишр
I DETLEY WULFF of 13 Brook Street Bremen, 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 :-
My invention relates to improvements in the construction and arrangement of
pump valves and valve seats in a simple manner.
In carrying out my invention with valves such as the valves of feed pumps the
valves are preferably multiple, each being in the form of a thin annular ring of
brass, copper or other suitable material either cut from a rolled sheet or cast, and
arranged one above the other. Each valve has an independent valve seat, the seats
being arranged to fit into each other, the whole forming a suitable construction for
retaining the valves in position.
For example, the lower seat may be in the form of a double ring the distance
between the two rings being the passage for the liquid and the upper faces of the
rings the portion on which the annular valve rests.
The inner ring has upward extensions or brackets on its inner edge, the outer
CD077

page_text: diameter of such extension forming the guide for the annular valve and the inner
diameter being made to receive the seat of the valve next above which also forms
the guard for the lower valve. If the upward extension on the seat is in the form
of a solid ring, then the valve has only one opening, namely, outwards but if the
extensions are in the form of brackets, then the valve may have two openings.
The guard of the upper valve forms the top of the structure and the whole is held
together by a central pin or bolt or in any other suitable manner.
The valves may
be of any section and may be fitted with a cushioning metallic corrugated ring or
with suitable springs.
In the accompanying drawings:
Fig. I shews in elevation, partly in section, my invention as applied to the suction
or discharge valves of an ordinary force pump of a steam engine; Fig. II being
a plan of the same, one half of which is shewn with the valves and guards
removed.
Fig. III is a sectional elevation of my invention as applied to a bucket pump,
as for instance an air pump of a steam engine, Fig. IV being a plan of the
same.
Figs. V to XV inclusive shew in section various modifications in the details of
the valves and guards, and Figs. XVI and XVII are sectional elevations of a feed
pump valve chest and boiler feed check valve respectively with the valves and
guards shewn in position.
The numbers on all the figures correspond.
Referring particularly to Figs. I and II, the valve seats 1, 1, 1 in the form of
inner and outer rings are held together by ribs 2 the spaces 3 between the rings
forming the passage for the liquid. The inner rings of the valve seats are provided
with extensions 4, the inner portion being for the purpose of receiving the seat next
above which is provided with a flange or lip 4' and on the outer portion there are
guides 5 for the valves 6. The lift of the valves 6 is limited by the brackets 7.
Any number of valves may be used, in this instance three being shewn the whole
being retained in position by the outer guard 8 and the bolt 9 with the nuts 91 or
by other suitable means. The valve seats and valves are shewn as of brass but
the material may vary according to the purpose for which they are used: for
example, vulcanised rubber, vulcanite ebonite or any fibrous or semi-metallic
compound may be employed.
The right and left hand portions of Fig. III are sections through A. B. and C. D.
respectively in Fig. IV. The upper half of Fig. IV is a plan of the bucket with
valves and guards in position, the right hand portion of the lower half is a plan
with the valves removed, the left hand portion being a plan of the bucket with the
whole of the valves and guards removed. In this arrangement, the valve seats (1)
with the valves (6) and outer guard (8) are of large diameter concentric with the
bucket, the other details being similar to those described for Figs. I and II.
Figs. V, VI, VII, and VIII shew a modified construction of the valve seats
and guards. The two rings forming the valve seat in this case are separate, as
shewn by Figs. VI and VII, the ribs (2) being cast on the inner ring containing
the extension (4). Fig. VIII shews two sets of valves and seats constructed in
this manner in position and Fig. V shews the guards (8) similar to that described
with reference to Figs. I, II, III and IV.
Figs. IX, X, XI, and XII are similar views to Figs. V, VI, VII, and VIII,
and shew a further modification in which the liquid flows through the valves in an
opposite direction to that previously described. In this case the extensions (4) are
on the outer ring forming the valve seat, and the seat next above may be provided
with a lip or flange 4' as shewn in Fig. XIV.
Fig. XVI is a vertical section through the valve chest of a feed pump such as
may be used in connection with a marine engine and shews the suction and discharge
valves in position. An opening (10) shewn by dotted lines is in communication
with the pump on the upward stroke of which water entering by the branch (11)
flows through the suction valves (12) into the casing (13), the valves (12) being

page_text: in the form shewn in the Figs. I and VIII. On the downstroke of the pump, the
valves (12) close and the water contained in the casing (13) is discharged through
the valves (14) and into the branch (15) which is connected by a pipe to the feed
check valve on the boiler, the valves (14) being arranged in an opposite direction
and as shewn in Fig. XII. An escape valve (16) is placed on the discharge
branch (15) and communicates with the suction branch (11) by a passage (17) in
the usual manner.
Fig. XVII is a vertical section shewing a boiler feed check valve such as may
be used in connection with the feed pump previously described. The valve
chest (18) is arranged with an extension (19) containing a screw down valve (20)
and provided with a flange (21) for connection to the boiler. On opening the
valve (20) water discharged from the feed pump enters the chest (18) by a
branch (22) and flowing through the valves (23) and (20) enters the boiler by the
branch (24) in the usual manner. The chest (18) is provided with a cover (25) for
gaining access to the valves (23) which are of the form described in Figs. I
and VIII.
The valves may be of any section and may be fitted with cushioning
corrugated rings as shewn at (26) in Fig. XV or they may be fitted with suitable
springs.
Although the designs illustrated are intended for the passing of liquids, my
improved valves are equally suitable for use in air compressors, the design and
materials of which they are constructed varying according to the particular
requirements, the primary object of the invention being to obtain large valve area
with a minimum lift of valve.
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 :-
:-
1. Pump valves constructed & arranged substantially as described and illustrated
with reference to Figs. I to XV inclusive.
II. Suction and discharge valves made according to my invention and arranged
within a feed pump chest substantially as described and illustrated with reference
to Fig. XVI.
III. My improved valves combined with a stop valve & arranged for use as
feed check valves for a steam boiler substantially as described and illustrated with
reference to Fig. XVII.
Dated this 19th day of March 1896.
D. WULFF.