Improvements in Surgical Pumps.
Year: 1892

page_text: COMPLETE SPECIFICATION.
Improvements in Surgical Pumps.
A communication from abroad by CHARLES HENRY TRUAX, of 75, Wabash
Avenue, Chicago, in the State of Illinois United States of America,
Manufacturer.
I, PHILIP MIDDLETON JUSTICE, of 55 and 56 Chancery Lane in the County
of Middlesex, Fellow of the Chartered Institute of Patent Agents, 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 that class of surgical pumps in which the liquid that is
pumped is propelled through a compressible tube by a compressor travelling upon
said tube; and this invention consists in certain details of construction fully set
forth hereinafter and illustrated in the accompanying drawings, in which :-
Figure 1 is a perspective view of a surgical pump embodying the improvements.
Figure 2 is a vertical section on the line 2-2 Figure 3.
Figure 3 is a transverse section on the line 3--3, Figure 2.
Figures 4 and 5, sectional views illustrating certain changes in construction
embodying the improvements, and
Figures 6 to 11 are detail views showing various means for adjusting the
compressors.
A is a curved support for a loop or bend of the tube B, the said support being
curved to correspond with a part of a circle having its centre the axis of a shaft 7
which carries one or more compressors. These compressors may be of any suitable
form, but are preferably shown in the form of rollers 2, each mounted upon a yoke 3,
carried by the said shaft.
Thus, the compressors C, C, in the construction shown in Figure 4, are in the
form of bent spring blades secured to a hub 5, upon the shaft 7, and the rotation of
the shaft carries the compressors successively against the bend of the tube at the
opposite sides of the support, compresses the tube and propels the body of the liquid
along the tube as in other surgical pumps of this character.
The preferred
construction, however, is provided with compressors in the form of rollers as before
described.
In order to adjust the compressors in the first instance and to vary the extent to
which they shall act upon the tube to compress the same, means are used for moving
the said compressors outward or inward from the shaft. Thus, referring to
Figures 1 and 2, of the drawings, it consists of a shaft 8, having reverse threads at
the opposite ends extended into threaded tubes 9, 9, connected with the yokes 3, 3,
said tubes sliding in radial openings in the hub 5, and the shaft 8, is provided with
a central wheel or disc 10, upon turning which, together with the shaft 8, the
tubes, yokes and compressors upon opposite sides of the hub are simultaneously
moved outward or inward, each to the same extent as the other. To permit the
ready turning of the disc 10, the hub is flattened so that the edges of the disc will
extend beyond the faces of the same, thereby permitting the thumb and forefinger
to be applied to the opposite edges to rotate it. It is desirable after the
compressors have been adjusted to their proper positions to prevent them from
being displaced and to which end there is combined with the adjusting mechanism a
suitable locking device, for locking against any movement of the adjusted parts. A
preferable form of locking device is a binding screw 12, provided with a head 13,
and extending through a threaded opening in one end of the shaft 7, so that its
end can be brought against the periphery of the wheel 10, to hold the latter in
place.

page_text: In Figures 6 to 11, there are shown other forms of devices for adjusting the
compressors. In Figure 6, the yokes 3, carrying the rollers 2, have a sliding
connection with the hub 5, and are provided with lugs 30, which are connected by
the oppositely threaded rod 31, and a worm thread 32, is formed on the central
portion to engage with the worm shaft 33, which extends through the hub 5, and
which is provided with a head 13, outside the casing or frame of the pump.
In Figure 7, a wedge 34, is employed, the inclined sides of which engage pins 35,
secured to the yoke arms and in Figure 8, the yoke arms are bevelled as at 36, and
the blocks 37, is adapted to be drawn between the bevelled ends by the head 13.
In Figure 9, a disc 38, having cam slots 39, engages the pins on the yokes and the
disc is rotated by bevelled gears 40. In Figure 10, a travelling nut 41, on the
threaded rod 42, is provided with links 43, engaging the yokes, and in Figure 11, a
cam plate 44, is provided with slots 45, engaging pins on the yokes. All these
various means of adjusting the compressors can be operated outside the case or
frame and any one desired can be used in connection with other features of the
invention.
The support A, may be in the form of a flat plate or rigid bar bent so that a
portion of the support conforms to a segment of a circle, and this portion may be
greater or less in the drawing being indicated as substantially a semi-circle, while
the free ends of the plate or bar may extend tangentially with relation to the circle
of which the support comprises a segment. The free ends of the segment are
preferably separated from each other to form a space or opening between them, as
shown in the drawings, and the opening may be of greater or less extent. As
indicated, the support is in substantially the form of a horse-shoe with the central
portion conforming to a segment of a circle, while the ends project therefrom
tangentially, leaving a space between their ends. The support is preferably
provided with loops 14, 14, at the ends, serving as clamps or guides for the tube
and with standards 15, at opposite edges for supporting the shaft 7, the said loops
and standards serving to hold the tubes in place upon the support.
The standards are shown as extending radially inward from the support, and the
shaft 7, is mounted in the standards.
A preferable construction, however, is to provide the support with opposite side
flanges 16, 16, forming as it were an intermediate groove in which the tube lies
and whereby it is maintained in proper position with respect to the compressors.
Such flanges may be cast directly upon the plate, but preferably the support is
made in two sections a, b, each provided with a flange 16, said sections being
connected separably together, thereby facilitating the construction and assembling
the parts of the pump. As shown in Figure 1 to 3, the section b, is secured to the
section a by means of three screws 19, the section a, being the largest, but in
Figure 5, the two sections are equal in extent and are provided with ears or
flanges 20, through which pass the securing bolts. In the construction shown in
Figures 1 to 3, the clamps or retainers at the ends of the support consist of inwardly
projecting lips 21, 21, but such clamps or retainers may be made in any suitable
form.
As the instrument has very frequently to be carried in the pocket or packed in a
case the shaft 7, is provided with a handle D, consisting of two sections c, d, hinged
together at x, the section c being secured to the shaft 7, and the section d, being
capable of folding upon the section c, for storing or transportation, as shown in
dotted lines Figure 3. To facilitate the supporting of the pump in operation the
support A, is provided at the lower side with a finger 25, adapted to fit a socket in
any suitable support X, provided with a binding screw 26, for bearing against the
flattened side of the finger.
It will be seen that by providing a support for the tube a portion of which
conforms to a segment of a circle having an open side flange, the tube is held
properly in position in respect to the compressor or compressors while access may
be had at all times to the tube along its entire extent to detect flaws or imperfections
and to the compressors for the purpose of adjustment, while all the parts may be

page_text: readily cleansed and subjected to sterilization frequently with suitable antiseptic
preparations.
Having now particularly described and ascertained the nature of my said inven-
tion 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 :-
1. A surgical pump provided with a tube, one or more compressors, and means
to operate them to carry them along the tube and with a support for the tube
comprising a rigid plate or bar, a portion only of which support conforms to a
segment of a circle and having open sides to permit access to the tube and
compressors, substantially as described.
2. The combination in a surgical pump, of a support in the form of a rigid plate
or bar, a portion only of which support conforms to a segment of a circle, and
having open sides to permit access to the tube, the tube, guides for retaining the
tube upon the inner face of the support, a transverse shaft carrying one or more
compressors, and means for supporting the shaft, substantially as described.
3. The combination in a surgical pump, of a rigid support, a portion of which
conforms to a segment of a circle, and the ends of which are separated to form a
space between them, a tube mounted in the support, a transverse shaft carrying
one or more compressors, and means for supporting the shaft, substantially as
described.
4. The combination in a surgical pump, of a rigid support a portion of which
conforms to a segment of a circle, and the ends of which are separated to form a
space between them, a tube mounted in the support, a transverse shaft carrying one
or more compressors, and means for supporting the shaft connected to the support
opposite the space between its ends, substantially as described.
5. The combination in a surgical pump, of a support in the form of a rigid bar,
a portion of which conforms to a segment of a circle, and having open sides,
standards projecting radially inward from said support, and a shaft mounted in said
standards, substantially as described.
6. A surgical pump provided with a tube, and a flange support for the tube
divided vertically into two sections, and means for securing the sections detachably
together, substantially as described.
7. The combination in a surgical pump of a curved support for the tube, a
transverse shaft, two compressors each carried by a part supported by and sliding
at right angles to the shaft and a transverse shaft having the reverse thread at its
opposite ends entering threaded sockets in the supports for the compressors,
provided with a disc 10, substantially as described.
8. The combination of the rotating shaft, one or more compressors, adjusting
screw and disc 10, and set screw arranged to bear upon the adjusting screw,
substantially as described.
Dated the 30th day of Norambor 1802
PHILIP M. JUSTICE.