Year: 1885

page_text: I, HENRY HARRIS LAKE of the firm of Haseltine, Lake & Co Patent Agents,
Southampton Buildings, in the County of Middlesex 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 what is known as the "Greindl" pump, and comprises
the improvements hereinafter described with reference to the accompanying
drawing, the several figures of which are hereinafter referred to.
In order to prevent the more or less unequal wear of the portions of the pump-
shaft traversing the pump-casing, I place upon the journals of the shaft sleeves c, c
which are concentric therewith and capable of being replaced at will. These sleeves,
which are preferably of brass, work with slight friction in bearings which are also
preferably of brass. These bearings which can be lubricated with water or oil,
wear very little and cause little resistance. By lubricating with water, the
employment of oil which is expensive, is rendered unnecessary, and the accidental
escape of any water through the sides of the casing is not detrimental. The
arrangement of the bearings described also permits the supports of the pump casing
to be brought as closely together as possible, whereby the liability of the bending
of the shaft is reduced to a minimum.
Being thus better supported, the shafts can be of smaller diameter, than
heretofore for performing the same work, thereby reducing the cost of construction
and greatly reducing the friction. The parts also which are liable to wear can be
easily replaced. Experience has shown that where the journals of the shafts are
not worn, and where the shafts are not bent, the internal parts of the pump do not
become damaged.
Also with this arrangement of the bearings the glands P, P¹ have not to serve as
bearings but only to close the pump casing, their sizes therefore can be considerably
reduced, and their positions (see Figure 1) enable the stuffing boxes to be readily
packed.
In the lateral faces of the rotary pistons R shallow recesses are formed (see the
drawing) into which extend the shoulders d, d, of the friction sleeves c, a The

page_text: latter which move freely upon the shafts, are thus more surely held concentric with
the shafts and pistons.
The keying of the pistons to the shafts is effected as follows, that is to say :-
In each shaft is formed a groove in which a feather C is fixed by screws. Half
the thickness of this feather is located in the shaft, whilst the other projecting half
fits corresponding grooves provided in the piston and sleeves c, c, which latter are
thus caused to rotate with the shaft. The piston R is additionally secured to the
shaft by a second key C¹, C¹ placed above the key C C, and a little shorter than
the hub of the pistion. The shoulders d d of the sleeves abut against the ends of
this key.
The sleeves are each provided with a small groove having holes t, t, t for
facilitating the lubrication of the bearings by the water or oil.
When oil is used as a lubricant lubricators g having passages leading to the
journals to be lubricated are placed upon the bearings.
When water is used as the lubricant the arrangement shewn on the left hand
side of Figure 2 is employed.
This arrangement consists in placing the hollow space of the pump support in
communication through small conduits with the delivery pipe of the pump; the
pressure of the water opposes any entrance of air.
The construction just described applies more especially to pumps of ordinary size.
For pumps of large size, the arrangements represented in Figures 3 and 4 are by
preference adopted.
The following explanations together with the drawing will indicate sufficiently
the mode of construction.
AA are screws serving to regulate the pressure of the water in the delivery pipe
upon cup-leathers which are employed to prevent the contact of the water with the
lubricating oil of the support.
B, B' are pockets or chambers.
C is a key or feather secured by screws and adjusted in a groove provided upon
the shaft. A portion of this key, equal to half its thickness enters longitudinal
grooves provided in the sleeves c and ensures the latter being caused to rotate with
the shaft.
C¹ C₁is a key placed above the feather C, C and additionally securing the rotary
piston R upon its shaft.
D, D are the delivery and suction compartments of the pump. EE and G, Gare
loose rings constituting the bottoms of the stuffing boxes. H H are hooks
connecting at M two parts of a separable sleeve for enabling the said sleeve to be
withdrawn from the bearings without being entirely removed. These sleeves,
instead of being in one piece and as shown in the support carrying the tightening
screw V, can be made in several pieces. J, J are screw threaded openings for
permitting the lubrication to be effected with pressure. 00 are sleeves for coupling
the pump with its motor, These sleeves can be disconnected for refilling the
stuffing boxes with packing and leather rings.
P P are double stuffing-boxes and glands completely preventing the entrance
of air.
RR are rotary pistons having laterally projecting shoulders.
SS are the supports for the pump.
V is a screw serving to press the piece Q upon the ring E E and pressing the
latter against the friction sleeve c of the support S.
a b are holes communicating with the delivery chamber. c, c are cylindrical
sleeves which are arranged concentric with the shafts and pistons and which are
easily replaced. The said sleeves slide with slight friction upon the shafts.
dd are the turned shoulders of the sleeves c, c, which shoulders enter recesses
formed in the sides of the hubs of the rollers. g, g are lubricators for lubricating
with oil. r is a pipe for use when lubricating with water. t, t, t, are holes formed
through the sleeves c, c for ensuring their lubrication.

page_text: The pump can be coupled with a motor by means of a special sleeve O which is
represented in Figure 3. This sleeve is formed in two parts bored out and exactly
cylindrical, which parts permit the shafts to be exactly united by the clamping
device; each part is splined upon fixed keys in order to prevent it from being
shifted during rotation. The tightening and loosening of the sleeve is effected by
means of screws provided with right and left hand threads and screwing into
external shoulders on the sleeves.
This construction of the sleeves, which is principally used for pumps of large size,
has the following advantages.
First, it permits of disconnecting the shaft of the pump from the motor, and
enables the pistons of the pump to be driven by any suitable motor, either by means
of toothed wheels, belts or cables or by any other suitable means.
Second, it permits the employment of journal sleeves formed in a single piece;
as after having drawn back the sleeves and unbolted the pump, the latter is caused
to slide upon its supports and the internal bearings are drawn out and can be
repaired or replaced, the pump is then moved back to its place again, and connected
with the driving mechanism by the aid of the coupling sleeves.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed as communicated to me
by my foreign correspondent, I declare that what I claim is
First. The employment of cylindrical sleeves arranged concentric with the shafts
of the pistons and capable of being readily replaced, for preventing the wear of the
said shafts.
Second. The arrangement of the bearings which permits them to be lubricated
either by water or oil, and also permits the supports to be brought as close together
as possible.
Third. The employment of the special sleeve described for coupling the pump
with the driving shaft.