Year: 1886

page_text: We GERONIMO CASTAÑON, RAMON MENENDEZ and SIMEON GIL all of 68 Faubourg
Poissonniére, Paris, France, Engineers do hereby declare the nature of this invention
to be as follows:-
Our Invention relates to that description of pumps in which the piston is formed
as a flexible diaphragm that is moved by a piston rod so as to assume inverted
positions alternately at opposite ends of a pump chamber, thereby displacing the
fluid drawn into the latter by the motion of the diaphragm.
According to our invention we construct such diaphragm of caoutchouc, by
preference of a truncated conical form, and having canvas sheets imbedded therein,
as also, if necessary, metallic rings for affording it the requisite strength. The
metal ring at the outer circumference of the diaphragm forms a bead by means of
which the diaphragm is secured in a corresponding annular groove in the casing or
pump chamber, the latter being formed in two halves secured together at the
seat of the diaphragm so as to nip this firmly and in a fluid tight manner between
them.
According to one arrangement of the pump, the diaphragm has a piston rod
passing through a hole in its centre and secured by collars on the rod that are
With this
made to nip the diaphragm between them by screwing or otherwise.
construction the pump is double acting, alternately drawing in and forcing out the
fluid into and from either side of the pump body, which is provided with the usual
double set of suction and delivery valves. For single acting pumps the diaphragm
has a sufficiently large central hole to receive the seat of a delivery valve, which is
held in a boss formed of two halves, each of which is screwed on to the outer
surface of the cylindrical seat so as to nip the diaphragm between them. The boss
has stirrups or bridge pieces passing over and under the valve to which the piston
rod and guide rod are attached.
When the diaphragm is made without the
nipped between the plane meeting surfaces
bead at its periphery, its edge is
flanges of the halves of the pump
chamber, taking care to make these with rounded inner edges where the diaphragm
has to bend over them alternately in opposite directions.
000
ABEL & IMRAY,
Agents for the Applicants,
28, Southampton Buildings, London, W.C.

page_text: We, GERONIMO CASTAÑON, RAMON MENENDEZ and SIMEON GIL, all of 68 Faubourg
Poissonnière, Paris, France, Engineers, 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 :—
Our invention relates to that description of pumps in which the piston is formed
as a flexible diaphragm that is moved by a piston rod so as to assume inverted
positions alternately at opposite ends of a pump chamber, thereby displacing the
fluid drawn into the latter by the motion of the diaphragm.
According to, our invention we construct such diaphragm of caoutchouc, by
preference of a truncated conical form and having canvas sheets imbedded therein,
as also, if necessary, metallic rings for affording it the requisite strength. The
metal ring at the outer circumference of the diaphragm forms a bead by means of
which the diaphragm is secured in a corresponding annular groove in the casing
or pump chamber, the latter being formed in two halves secured together at the
seat of the diaphragm so as to nip this firmly and in a fluid tight manner between
them.
According to one arrangement of the pump, the diaphragm has a piston rod
passing through a hole in its centre and secured by collars on the rod that are
made to nip the diaphragm between them by screwing them or otherwise. With
this construction the pump is double acting alternately drawing in and forcing
out the fluid into and from either side of the pump body, which is provided
with the usual double set of suction and delivery valves. For single acting
pumps the diaphragm has a sufficiently large central hole to receive the seat of a
delivery valve, which is held in a boss formed of two halves, each of which is
screwed on to the outer surface of the cylindrical seat so as to nip the diaphragm
between them. The boss has stirrups or bridge pieces passing over and under the
valve to which the piston rod and guide rod are attached.
When the diaphragm is made without the bead at its periphery, its edge is
nipped between the plane meeting surfaces or flanges of the halves of the pump
chamber, taking care to make these with rounded inner edges where the diaphragm
has to bend over them alternately in opposite directions.
The accompanying drawings shew. various constructions of pumps having our
above described invention applied thereto. Fig. 1 shews a part elevation and part
section of the before described caoutchouc diaphragm piston p, in which are
imbedded layers of canvas indicated by the lines a a, and metal rings b, b', of
which the outer one b¹ forms a bead by which it is secured between the hollow
annular rims of the two halves A. A of the metallic pump casing as shewn at
Fig. 2. The diaphragm piston has a central hole through which passes either the
piston rod T as at Fig. 2 or in which is fitted the valve k as at Figs. 6 and 7; it is
held at the circumference by the casing A in the manner described in a sufficiently
firm manner to dispense with screw bolts passing through it, the parts of the
casing being secured together by screw bolts passing through the lugs cc, Fig. 3.
The diaphragm might also be used without the bead at the circumference, as
shewn at Fig. 4, in which case the edges d d of the casing between which it is
nipped as at Fig. 5 should be rounded off as much as possible,

page_text: When the piston has a piston rod T passing through it as at Figs. 2 and 5, the
rod has a collar e formed upon it against which the piston is tightly nipped by a .
washer pressed upon by a screw nut g, Fig. 2 or by a key h Fig. 5.
When the piston is provided with a valve at its centre as in the construction at
Fig. 6, or Fig. 7, there is fitted into the central hole a short tube k, having an
external screw thread formed on each end, on which are screwed rings; m so as to
nip the inner edge of the piston between them, with the intervention of a washer
on one side, the rings ; m being formed with bridge pieces ln to which are.
connected, on the one side the piston rod T and on the other side the guide rod.
In order to exert greater pressure upon the liquid to be propelled by the pump,
the piston is by preference made of hemispherical shape, but in this case as the
inversion of the piston presents some difficulty, there are provided on either side
thereof metal hemispherical guides or supports, as shewn at B B Fig. 8, which are
fixed upon the piston rod C and which have openings o o for the passage of the
liquid through them. They are strengthened by arms p¹ p¹ cast in one with them
and a central boss through which the piston rod passes. These guides also serve
to protect the caoutchouc piston against the impact of solid matter that may be
drawn into the pump with the liquid and for assisting this object the guides might
also be provided with a finely perforated or wire gauze covering. Fig. 9 shows a
plan of one of the guides B. When the flexible diaphragm is employed in the last
described manner,
it is only provided with an imbedded metal ring b near its
centre, to serve as means of securing it in the guides, which have corresponding
circular grooves, and a second ring b¹ at the periphery for securing it to the casing.
The caoutchouc diaphragm might be further strengthened, by imbedding cords
therein arranged either radially or in concentric circles, or both.
Fig. 10 shews a construction of valve which we employ in combination with the
above described pumps when these are made to act upon fatty or viscous liquids.
The valve s is formed with a curved surface, as is also its seat q; its rod r is
pivotted to a levert which is weighted so as to tend to close the valve. When the
valve closes on its seat a frictional sliding action takes place between the two
surfaces which tends to clear them of any fatty or viscous deposit.
Pumps provided with the above described construction of diaphragm pistons can
be worked either by hand or other power, and may be used for any purposes for
which ordinary pumps are employed; in particular they may be used for pumping
acids, the metal parts being suitably coated or protected for this purpose.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is :-
1. The improved construction of pumps with flexible diaphragm pistons
composed of caoutchouc in which is imbedded canvas or other textile fabric and
one or more rings of metal serving to strengthen the caoutchouc and to secure it to
the casing without screw bolts passing through it, the casing, being provided with
corresponding annular grooves into which the said rings fit substantially as herein
described.
2. The construction of pumps with flexible caoutchouc diaphragm pistons as
herein described with reference to the accompanying drawings.