A. REY

PUIP

April 12, 1927.

Filed Oct. 3 Sheets-Shut 1 April 12, 1927.

A. REY

PUMP

Filed Oct. 6, A1924 3 Sheets-Sheet 2 April 12, 1927. A. REY A 1,624,363l

PUMP

Filed Ot. 6, 1924 3 Sheets-Sheet 3 Patented Apr. l2, 1927.

PATENT OFFICE.

AUGUSTIN REY, vor sTAINs, FRANCE.

' PUMP.

Application led October 6, 1924, Serial No. 741,988, and in France October 8, 1923.

This invention relates to improvements in the construction of externally adjustable constant delivery pumps, and more particularly, but not exclusively, of the type in which there is a rotary pump barrel whose rotation regulates suction and delivery, and in which works a number of plunger pistons.

These improvements have for their object to obtain absolute regularity of delivery, and, by almost completely eliminating wear at the points of attachment of the pistons, to effect substantial economies in maintenance.

The pump is particularly useful for feeding liquid under pressure, for transmitting power, lubricating engines and joints, as well as for-machines employed to displace liquids or gases (compressors, pumps and the like). 1,/ According to; this invention the pump barrel, surrounded by a casingl1as init chambers which are parallel to the axis of the barrel, while the pistons or plungers working in the chambers are connected to a block movable in a head, fast with the casing, means being provided for inclining the block about an axis at right angles Vto the axis of the barrel, and for rotating either the barrel or the casing.

The heads of the pistons are connected to the block by a universal joint, while provision is made` for movements of the coupling members to compensate for the difference in the diameters of the elliptical path described when the block is inclined to the axis of rotation.

To adjustthe delivery of the pump while running, means such as a screw and universal joint may be' provided for altering the inclination of thebldck.

The invention is illustrated in the accompanying drawings, in which Figure 1 is a partial longitudinal section of a three piston pump, Figure 2 a section-.on the li'ne X-X of Figure 1, Figures 3 and 4 respectively a side elevation and an end view of the pump head. Figure 5 Shows a detail.

Referring to Figures 1 and 2, 1 is a cylindrical pump casing, one end 2 of which is formed to receive a continuation 4 of the distributing barrel 5, while the other end of the pump .casing is provided with a head 3.

6 and 7 are respectively the suction and delivery ports, which are alternately placed in communication with .the barrel chambers through grooves 6 7 separated by small solid portions formed on the casing l, or on an inner sleeve thereof.

Barrel is, as above set out, provided with a prolongation '4, whereby it can be rotated by'mecbanical means, suchas a pulley 8, or by a toothed wheel, or by the direct drive from an engine.

Barrel 5 is bored at 9 to form a suitable number of chambers, as illustrated, three, in which Work plungers 10. The chambers 9 are parallel to the axis of rotation of the barrel and communicate through passages- 11 with the grooves 6', 7.

Pumps of this type are known, but other similar pumps have a stationary barrel and a movable casing. Various means have been proposed for reciprocating the pistons. Thus,it has been'proposed to move the head 'of the piston by a -plate whose axis of rotation is inclined to the axis of the barrel. It will be seen that with this arrangement, when the barrel is rotated, the projection of the point of abutment of each piston head on the axis of the barrel is given an alternating movement, but if the plate merely acts on the piston heads without a mechanical joint between them, the pistons will only move inwards and will not return; to

enable the pistons to return, they must be connected to the plate by a joint such thatv a central opening 13. Externally, head' 3 is prolonged by two plates 13', Figure 4, which are cast with the head..

14 is akblock provided' with a spherical portion concentric with the cavity 12 of head 3; the block 14 is, moreover, provided with a prolongation 15 having two flats which slide in the opening 13 between the plates 13.

The outer edges of plates 13 are circular,

A En

so that block 14 can bev set in any position and there locked by clamping a plate 16 against plates 13 by a nut 17 screwing on the outer end of prolongation 15. The setting ot block 14--15 may be effected in any suitable manner. As illustrated, in Figures 3 and 4, it is effected by a milled head 21, a screw rod 18` (in a slot 19 formed in one plate 13") acting upon a pin 20 which engages prolongation 15. The displacement given by screw rod 18 may be made very accurate by the provision of a fixed scale 22, and movable pointer 23, or vice versa, so that it'is possible, while the pump is in action, to adjust the inclination of block 14 to the axis of casing 1, by unscrewing nut 17, bringing this head into a new position and then again screwing up. I

Block 14 is provided with a central recess 14 for receiving a nut 24; 25 is a plate, 26 a block, and 26' a prolongation thereof,

while nut 24 is carried by the prolongation 26 and screws against plate 25. A ball bearing may be interposed between plate 25 and block 26, in' which the heads of pistons 10 are mounted. As plate 25 is rigidly xed y to the block`14, it will be seen that block 26 is, to some extent, fast with it, and will follow any movement given to it by the screw 18, but it can also turn with mild friction around axis 26. Block 26 is of cylindrical shape, but can move freely in the recess in head 3 and in casing 1.

The heads 30 of the pistons 10 are connected to block 26 by ball joints formed of a pin 27 passing through piston rod 10 an ball segments 28 arranged in a socket 29 formed in block 26; pin 27 can thus rotate in socket 29.

The positions of pin 27 -and segments 28 may be reversed from that shown in Figure 1, i. e., pin 27 may be radial and segments 28 tangential to the block 26.

It will be seen that in the neutral position of block 14, i. e., when the axis of prolongation 15 is coincident with the axis of barrel 15, the rods 10 are at right angles to the plane of the base of block 26 but when block 14 is inclined (and therefore also block 26) rods 10' must position themselves; for this purpose each socket 29 is extended by a recess 29'.

lVhen, however, block 26 is displaced, the heads of the piston will no longer, as in the neutral position, describe a circle; it is therefore necessary to allow for the dii'erence between the large diameter (which remains constant) and the small diameter which depends on the angle of prolongation 15 to the general axis, so that the attachment heads 3() can slide slightly upon the pins 27 which' connect them to the block 26.

The spaces 31 between the head 30 and segments 28 provided with this object, are of course a function of the diameter of the barrel, or with greater exactitude, of the dis-- tance ofthe pistons to the general axis and of the `inclination which can be given to prolongation 15.

Moreover, the segments 28 slide slightly in socket 29, these movements compensating for the deviation from a circular path described by the heads 30.

The apparatus operates as follows:

When barrel 5 is rotated by pulley 8, pistous 10 are rotated and in their turn drive plate 26 which turns about its axis 26. It' axis 26' is inclined to the axis of rotation of the barrel, the heads of the pistons more in and out ot the barrel to perform the suction and delivery strokes, the chambers in the barrel being automatically placed in communication with the inlet and exhaust ports 6 and 7 by the grooves 6 and 7.

lVhen the barrel is stationary, and casing 1 and its head 3 are' rotated, the block 26 will be reciprocated and the block 14 will:

turn about the axis 26', same effect.

It will be seen that the movements take place quietly; each piston acts for itself, its head 30 turning about its in 27, and the segments 28 in their socket, t e sliding movement of head 30 on its pin 27, and that of segments 28 in their socket 29, always taking place between parallel surfaces.

It will be seen. that serious wear of the parts cannot take place, whereby stoppages are reduced to a minimum.

The set of barrels 5 in casingr 1 for the unmasking of passages 6 and 7 allows of thus providing the loo always being at delivery pressure; in order,

however, to compensate for possible slight pulsations, the delivery passage 7', for example, may, as illustrated in Figure 5, be provided with a radial outlet 33 closed by a lexible membrane 32 or ang other elastic liquid tight part, not attacke by the liquid pumped.

I claim:

1. In a pump barrel, the combination wlth a pump casing of a pump barrel having chambers therein parallel to the axis thereof, a rotatable member suitably supported within the pump casing for rotation about an axis coincidentv` with the axis of the pump barrel, said member having spherical socklets therein, pistons Working in the cham- 1,e24,ses

Yrel, and means for rotating the 'pump barrel.

member for rotation about an axis coinci-l dent to the axis of the pum barrel, pistons working in the chambers o the pump barrel and having iiexible connection 'with the said pivotally mounted member, means for moving the said adjustable member relatively to its seat for inclining the axis ofthe rotatable member'to the axis ,of thepump barrel, and means for locking the adjustable member in the position to which moved.

3. In a pump, the -combination with a pump casing having a hemispherical seat at 4one end, la rotary pump barrel within the casing having piston chambers, pistons operatinein the said chambers, a cylindrlcal mem r having the said pistons connected thereto, a hemispherical member slidably supported on the said seat and having the said cylindrical member pivoted thereto for 'rotation about an axis coincident to the axis Vof the pump barrel, said hemispherical member having a prolongation extending through the seat and exteriorl of the pump casing, spaced guide members etween which lthe said prolongation extends, said guide members havin their outer edges curved in conformity wit the curvature of the said seat, means for moving the said prolongation to incline the said cylindrical and hemispheric-al members with respect to the axis of the pump barrel, and locking means carried by said prolongationand being adjustable into binding engagin with the said curved outer edges of the gui e members to hold the said eir adjusted position.

' `.AUGUSTIN REY.

ciylin'drical and hemispherical members in t 1