Improvements relating to Valves for Pumps, Blowing Machines, or the like.
Year: 1886

page_text: Improvements relating to Valves for Pumps, Blowing Machines,
or the like.
I, ALOIS RIEDLER of Aachen, Prussia, in the Empire of Germany, Professor in
the Polytechnic School, 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 :—
This invention relates to valves for pumps, blowing machines, compressors or the
like, and has for its object to ensure the regular working of valves, the lift or
movement of which varies and which are consequently liable to operate improperly.
The invention consists in the combination with the outwardly extended valve-
stems of two or more valves appurtenant to a pump or similar machine, or to several
coupled machines, of a revolving cam, excentric or crank, and of suitable mechanism
by the aid of which the valve-stems are simultaneously or alternately acted upon
by said cam, excentric or crank, so as to close the respective valves at the moment
when the motion of the piston is reversed and to set them free again immediately
or a short time afterwards.
In order to make my invention fully understood I will describe the same with
reference to the accompanying drawing in which
Figure 1 is a sectional elevation of a valve controlled by means of a crank.
Figure 2 is an elevation of the valve-chamber of a single-acting pump the two
valves of which are alternately controlled by one revolving cam.
Figure 3 is an elevation of the valve-chamber of a double-acting pump having
its four valves controlled by a cam.
As shown in Figure 1 the valve vis free to act automatically except at the
moment when the end of the rod 8, to which a reciprocating motion is imparted by
means of a crank k and a connecting-rod, touches the collar c of the valve-stem.
In the drawing, the rod s is shewn as guided by the valve-stem, which enters
a bore in said rod; it is obvious however that it may be guided by any other
suitable means.
The crank and connecting-rod may be replaced by an excentric and excentric-
rod; and the revolving shaft w, carrying the crank or excentric may be the main
driving shaft of the pump or similar machine, or any other shaft revolving at the
same speed. The contact between the reciprocating rods and the collar c of the

page_text: valve-stem takes place a moment before the motion of the piston is reversed, and
the throw of the crank or excentric is so regulated that the valve is either pressed
onto its seat, or moved towards the same; in both cases, the automatic valve being
thus controlled will be closed at the moment when the piston has ended a stroke,
whereby the full effect of the pump or similar machine will be ensured. It is clear
that the piece or driver reciprocated by the crank may be adapted to act on more
valve-stems in a similar manner as on the stem of the valve v.
Figure 2 shews the automatic suction-valve v and the automatic discharge-
valve v of a single acting-pump, adapted to be alternately closed under the action
of a revolving cam d. In the drawing it is supposed that the piston has terminated
its suction stroke and begun its discharge stroke. The reciprocating rod s, designed
to ensure the suction-valve v being closed at the right moment, then abuts onto the
collar c of the stem of this valve, while the discharge-valve v¹ being released by its
controlling rod 8³, is free to operate.
In order that both the rods s, s¹ may be reciprocated by the cam d the same are
connected by means of links to the ends of a two-armed lever h, h', which is
oscillated by means of the approximately triangular cam d; said can being in
contact with two anti-friction rollers, pivotted to the arms of a fork formed in
one piece with the lever h h¹.
In Figure 3 the cam d is shown as reciprocating parts or drivers by which the
closing, at the right moments, of the four automatic valves v, v¹, v³ ³ of a double
acting pump or similar machine is ensured. As shewn in said Figure, two anti-
friction-rollers r, have their pivots fastened to a sliding carriage, to which the
cam d, in contact with said rollers, imparts a to-and-fro motion. Links 12, 73
connect the ends of said carriage to lever arms, secured to shafts h, h2, each of
which shafts carries a crank at each end. One crank of each rocking shaft h h²,
reciprocates the part by which the corresponding suction-valve v or v² is closed and
released at the proper time; while the other cranks serve to oscillate, by means of
links and other cranks, the shaft h, and h³. These latter shafts, being caused to
oscillate in the same manner as the shafts hh, alternately cause the rods or drivers
to push the discharge valves v, vs towards their seats, every time the piston is about
to terminate a stroke.
From the above arrangement it results that when cranks or excentrics are used
for reciprocating the parts acting upon the valves the latter will be under control
for a moment only, while with the use of cams the valves will be under control for
a somewhat longer period.
I wish it understood that other mechanism besides that described may be
employed for reciprocating the rods or other parts by which the automatic valves
are caused to close at the proper times, for instance levers may be directly oscillated
by the reciprocating parts of the pump, the motion of these lovers being con-
veniently reduced to close the valves.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is
First. The combination with the outwardly extending stems of the automatic
valves of pumps, blowing machines or the like; of rods or drivers reciprocating
upon the extensions of said stems each rod or driver moving in the path of the
corresponding valve-stem for a distanco nearly equal to the throw of the valve, and
terminating its stroke toward the valve a moment before the valve would be auto-
matically closed, thereby forcibly pressing said valve towards its seat, the valve
being again released before the motion of the piston is reversed substantially as,
and for the purpose, set forth.
Second. The combination with the outwardly extending stem of an automatic
valve, the said stem being provided with a collar, of a socket 8 free to move longi-
tudinally on the stem and reciprocated by a crank k and connecting rod, or by an
excentric and excentric rod, the socket s moving in the path of the collar on the

page_text: valve-stem for a distance nearly equal to the throw of the valve, substantially as
shown and described.
Third. In a pump, blowing machine or the like, the combination with the out-
wardly extending stems of a suction-valve v and of a delivery valve v¹, the said
stems being provided with collars; of sockets s, s' movable longitudinally on said
stems, a two-armed lever h, h having its ends connected to said sockets by links,
and a triangularly shaped can d, mounted on a revolving shaft w and oscillating
said lever, substantially as shewn and described, and for the purpose, specified.
Fourth. In a double-acting pump, the combination with the outwardly extending
stems of the four automatic valves v, v¹, v³, v³, of shafts h, h1, h2 ³ arranged trans-
versely, of said stems and carrying cranks to enable them to reciprocate rods or
drivers in the paths of the valve-stems, and of a triangular cam & mounted on a
revolving shaft w and reciprocating a sliding carriage, which rocks said shafts by
means of links and cranks, substantially as, and for the purpose, described.
HASELTINE, LAKE & Co.,
For the Applicant.