US2420970A

US2420970A - Apparatus for delivering liquids and viscous materials

Info

Publication number: US2420970A
Application number: US563066A
Authority: US
Inventors: Parker Harry; Rowland Thomas Carlyle Ellison
Original assignee: Individual
Current assignee: Individual
Priority date: 1944-02-10
Filing date: 1944-11-11
Publication date: 1947-05-20
Anticipated expiration: 1964-05-20

Description

May 20, 1947. H. PARKER ETAL 2,420,970

APPARATUS FOR DELIVERING LIQUIDS AND vIscoUs MATERIALS Filed Nov; 11, 1944 3 Sheets-Sheet l,

\NVENTORS May 20, 1947. H. PARKER ETAL APPARATUS FOR DELIVERING LIQUIDS AND VISCOUS MATERIALS 3 Sheets-Sheet 2 Filed Nov. 11, 1944 lNVEHTORS' May 20, 1947. H. PARKER ET AL APPARATUS FOR DELIVERING =LIQUIDS AND VISCOUS MATERIALS Filed Nov. 11, 1944 3 Sheets-Sheet 3 FIELG.

Patented May 20, 1947 APPARATUS FOR DELIVERING LIQUIDS AND VISCOUS MATERIALS Harry Parker, Kings Heath, Birmingham, and

Thomas Carlyle Ellison Rowland, Solihull,

England Application November 11, 1944, Serial No. 563,066

In Great Britain February 10, 1944 16 Claims.

. 1 This invention relates to apparatus for deliverlng liquids and viscous materials (hereinafter referred to as liquids) and applies in all cases wherein liquid is to be fed under pressure from a container to a plurality Of individual points.

For instance the invention. has particularreference. to lubricating systems in which a pump or propelling device is employed for feeding lubricant to a number of separate positions as in thecase of c'hassis'lubrication for road vehicles, or in stationary machinery.

Our invention applies to that kind of apparatus which includes liquid propelling means, such as a pump supplying liquid to a rotary distributor and means for driving the rotary distributor so that it delivers the liquid to each of a number of delivery conduits in succession. Such apparatus is disclosed in our prior U. S. Patent No. 2,157,970.-

One of the objects of the present invention is to provide improved apparatus for delivering liquids and viscous materials under high. pressure by means of a rotary distributor co-operating with a stationary ring having a number of conduits wherein a delivery arm on the rotary distributor is maintained in pressure contact with the ring during delivery .and wherein this pressure is relieved so that the rotary distributor can turn from one position to another under light load supplied by a spring between the delivery periods.

A further object of the present invention is to deliver at any desired pressure a; given quantityof liquid without loss due to leakage between the contacting faces .of the rotary distributor and the member having the conduits to which the liquid is fed.

According to the present invention some or all of the pressure applied to operate the pump plunger is transmitted during pump delivery, and

while the rotary distributor is stationary, to the contacting faces of the rotary distributor and the member having the conduits in a direction to prevent their separation, and the relation between the cross sectional area of the pump plunger, the area of contact between the contacting faces of the, delivery arm of the rotary pump and when the rotary distributor is movin around its axis but light pressure is maintained between the contacting surfaces by a spring act- 'ing on the distributor.

Movement of the pump plunger on the, delivery stroke is preferably produced by a mechanically driven rotary member which is provided with means for producing mechanically the rotary movement of the distributor during the return movement of the pump plunger.

For instance the endwise movement of the pump plunger on the delivery stroke may be produced by a face cam mounted on an axis which is parallel to the axis of the rotary distributor and the face cam may have an eccentric pin engaging an oscillating member mounted on the rotary distributor, the oscillating member carrying a pawl. engaging a ratchet Wheel fixed to the rotary distributor.

The rotary distributor may have a pump portion of cylindrical form mounted for rotation in a circular opening in the ring having the conduits, the face of the ring being engaged by a delivery arm on the distributor, a body formed as a hollow casing being secured to this ring,

this body containing the cam for producing the delivery stroke of the pump plunger and the endwise pressure on the pump plunger being transmitted to the rotary distributor and to its delivery arm.

Further the rotary distributor may be provided with one or more balancing arms engaging the face of the ring and angularly spaced away from the delivery arm so that when pressure is applied to the rotary distributor parallel to the axis of the pumpand at right angles to the engaging faces of the ring and the delivery arm, there will be no tendency to tilt the disdistributor and the member having conduits, and

the cross sectional area of the passage through which the liquid is forced, is such that the load on the pump plunger or this load plus the pressure of a spring acting on the distributor produces a pressure at the contacting faces of the delivery arm of the rotary distributor and the member having the conduits equal to or in excess of that required to ensure a seal between these contacting surfaces:

The pressure between the contacting surfaces due to load on the pump plunger is preferably removed after each delivery stroke of the tributor;

Pivoted to the casing we may provide an idler face of the cam, the idler arm acting upon a memberwhich engages the pump plunger. By this means the side thrust produced by the rotation of the cam is absorbed and not transmitted to the pump plunger.

The body of the appliance may serve to enclose worm or other reduction gear by which the cam operating the ump plunger is driven.

The appliance is preferably driven from .a rotating part, of the vehicleor machine, such, for instance, as the speedometer drive, so that the number of pump deliveries is proportional to the mileage of the vehicle, or, in the case of stationary machinery to the length of time themechamsm is run.

Referring to the drawings:

Figure 1 is a plan view partly in section showing one construction in accordance with the inr vention'.

one end H and contains a ring l2 having a circular row of-conduits 13, extending parallel to its axis, for receiving the deliveries of liquid. This ring I2 is 'detachably secured by screws M to the flange l5 of a cap l6 closing the end of the casing lil'and secured thereto by bolts IL The flange I5 is provided with an equivalent number of conduits l8 to which delivery pipes i 9 areattached, leading away to the positions where the lubricant is required. Each of the conduits 18 contains a non-return valve 20. This part of the arrangement may be similar in principle to that disclosed in our prior British specification No. 459,946.

An opening is provided through the ring E2 in which is fixed a bearing 2| and mounted in this bearing is the rotary'distributor 22. The rotary distributor 22 projects through the bearing 2! in the ring and the end of the distributor which projects through the bearing is enclosed by the cap l6.

The rotary distributor comprises a cylindrical body part 23 having an inlet port 24 and a discharge port 25 for the lubricant and having an axial cylindrical passage 26 in which the endwise moving vpump plunger operates. This pump plunger is in two-

parts

21, 28, one of which 21 is positively operated in one direction by a cam 29 and returned by a spring 30 acting on a washer 3| engaging a collar 32 on the part 21, while the other part 28 is spaced away from the end of the part 2! and is acted upon by a spring 33 tending to move it towards the plunger part 21.

In the cylinder 26 in which these parts work, there isa gap 34 between the two

parts

21, 28 of the pump plunger and this gap becomes filled with liquid through the inlet port 24 in the cylindrical body 23 of the rotary distributor.

The two

parts

21, 28 of the pump plunger move together with liquid imprisoned between their adjacent ends until the gap 34 containingthe liquid registers with the discharge port 25.

This port is provided with a non-return valve 35.

The two parts of the pump plunger move in an endwise direction with the liquid to be pumped imprisoned between their adjacent'ends until this liquid is moved to a position opposite the delivery port 25, and a shoulder 36 near the end of the part 28 of the plunger comes into contact with a cap 31 secured to the end of the rotary distributor body. Delivery then takes place and during delivery the cam pressure acting upon the pump plunger is transmitted by the shoulder 36 to the rotary distributor body and keeps a delivery arm 38 on the said body in pressure contact with the ring l2 having the conduits through which delivery takes place.

The delivery arm 38 and the body 23 of the 39 leading to a passage 40 in a plug 4| mounted in the end of the delivery arm and engaging the face of the ring l2.

The spring 38 operating to keep the face of the plug 4| in contact with the face of the ring 12 at all times to allow pressure to be generated as the pump plunger is operated.

The delivery arm 38 is also preferably provided with a branch passage can be set to open at any predetermined pressure.

This permits of the escape of the liquid back -into the casing should the pressure inv the pipe.

exceed the said predetermined pressure.

In order to balace the rotary distributor extending in a direction opposite to that of the delivery arm and having facings 46 engaging the ring l2. Instead of engaging the ring l2 the balancing arms may. engage any other suitable structure such for instance as the flange l5.

These two further arms are spaced apart by a relatively small angle and fixed to the rotary distributor between these arms is a registering device incorporating a pawl 41 pivoted at 48 to the arm 44 and acted upon by a spring 49 mounted on a pi 58 on the arm 45,'this pawl engaging in succession the teeth of a rachet" wheel 5] fixed on the bearing 2! so as to ensure distributor are provided with a delivery passage v the correct positioning of the delivery end or the passag through the delivery arm in line with one of the receiving conduits in the ring, and preventing return movement of the distributor after it has been moved by the means now to be described. a g

The rotary distributor is given a step by step rotation so that delivery is made at successive operations of the pump to separate conduits in the ring l2.

For this purpose the rotary distributor has attached to it a ratchet wheel 52 which is acted upon by a pawl. 53 pivoted at 54 upon an oscillating ring 55, which ring is mounted upon a projecting cylindrical part 56 of the rotary distributor. The arrangement is such that the ring is oscillated by means of an eccentric pin 51 on the rotary cam 29 provided within the casing of the appliance, which cam is used for producing the endwise movement of the pump plunger.

The oscillating ring 55 is provided with an 6| in which slides a square block 62 mounted on the eccentric pin 51.

Rotation of the cam 29 causes the pin 51 to move in a circular orbit and the movement is translated by the block 62 moving in the radial slot 6| into an oscillating movement of the ring 55 causing the pawl 53 to advancethe ratchet wheel 52 and the rotary distributor by one step. Backward movement of the rotary distributor on the return strok of the ring 55 is prevented by the pawl 41 which engages with the stationary ratchet wheel 5|. I

The pump plunger has one end enclosed in a cap 63 which is engaged by the end of the plunger 21. The spring 38 produces the return movement of the pump plunger.

The screwed cap 31 receives the endwise pressure from the pump plunger 28 during the delivery stroke and this cap is provided with a' pair of jaws 64 engaging flats upon a sleeve 68 screwed to the projecting end of the pump plunger 28.

Means are provided for adjusting the gap between the adjacent ends of the two

parts

21, 28 of the pump plunger so that the volume of liquid delivered at each delivery stroke can be adjusted, and such means may take the form of a transverse pin 65 extending through the cap Hi, this 42 communicating with the passage 38, the passage, being normally closed by a spring loaded safety valve 43 which 63 is of non-circular form so that it can readily be turned and is provided with a flange 81 having, a portion which moves between two stops formed on the exterior of the cap l6 so that rotarymotion of the pin 65 is limited to 180 and the position of the flange 8'! in relation to the stops will give 5 an indication of the position of the eccentric part 66 of the pin in various adjusted positions.

For driving the pump plungeron the delivery stroke the cam 29 is provided and this is mounted to rotate about an' axis parallel with that of the rotary distributor and is driven by worm gear Ill, H- situated within the appliance. The casing of the appliance is provided with bearings 12 for the worm shaft 13 on which is the worm l0 engaging the worm-wheel I l' fixed upon the cylindrical boss 14 of the cam 29.

The worm is preferably fixed or formed intermediate the ends of the worm shaft 13 and both ends of the worm shaft are mounted in bearings 72 in the casing and both ends may be formed or provided with means whereby they may be placed indriving engagement with a driving shaft, in which case the arrangement would be such that the worm shaft can be driven from either both ends of the worm shaft l3 with means so that they may be engaged by a driving shaft, the construction illustrated in Figure 1 may be employed and if it is desired to drive from the opposite side of the casing, the bearings 12 are taken out and placed in the oppositesides of the casin from the position shown in Figure 1, the shaft 73 being placed in the opposite way round. The cam 29 is symmetrical on either side of its highest point and for either direction of rotation it produces 'the necessary reciprocating movement of the pump plunger and the eccentric pin produces the step by step rotation of the rotary distributor.

The cam is mounted upon a sleeve-like hub 15 formed on a plate secured to the casing and the cam has a flange 16 which is secured to the side of the worm wheel which rotates with its opposite side in contact with the aforesaid plate. The

cam is a face cam, the face l1 being formed at the edge of the flange 16 on the cam which is secured to the side of the worm wheel.

An idler arm i8 is pivoted at 19 within the casing containing the cam and at right angles to the axis ofthe cam. At its fre end the idler arm so is provided with a roller Bil bearing on the operative face of the cam and adjacent the roller, the idler arm is provided with a facing 8! which bears on the cap 63 which engages the end of the pump plunger member 2?. a 65 In the case of a vehicle the drive to the worm 75 shaft may consist of a flexible or other shaft connected to a gear unit mounted on the speedometer drive, or to a rotating member in the gear box; or a belt and pulley drive may be employed.

A modification is shown in Figure 7 wherein the ring I2 is secured to the casing l0 instead of being secured to the flange ii of the cap I6. In this construction the flange I5 is separate from the cap it and these two parts are separately secured to the end of the casing and the arrangement is such that the casing [0, ring l2, cap 16,

and the rotary distributor can be removed as a unit, leaving the flange l5 and its pipe connections undisturbed.

In carrying the invention into effect, regar must be paid to the relation between the diameter of the pump plunger, the areaof'contact between the facing at the end of the delivery arm of the rotary distributor and the ring, and the cross sectional area of the conduits through a which the liquid is to be forced. It is necessary that the load on the pump plunger together with the load provided by the spring 30 shall produce a pressure at the contacting surfaces of the delivery arm and conduit ring equal to or in excess of that required to ensure a seal between these contacting surfaces.

We have found that the necessary seal is obtained when using a pump plunger one-quarter of an inch in diameter by using a spring 38 which provides a minimum load of five pounds and a passage 40 of one-sixteenth of an inch in diameter and a plug M having an end face which bears Y on the ring, this end face being flve-sixteenths of end and in either direction. Instead of making 35 an inch in diameter, this arrangement being used when the angle between the balancing arms M and i5 is about 20 and all bearing on the same ring,

What we claim then is:

- 1. Apparatus for delivering liquids, comprising a hollow body through one end of which extends a plurality of delivery openings, the inner ends of which are disposed in a circularrrow, a rotary distributor arranged in said body co-axially with said row of openings, a pump in said distributor, a radial arm on said distributor, said pump and said arm having a delivery passage for liquid, said arm having a facing engaging said body and the delivery passage extending through said facing and registering in turn with the ends of each of said delivery openings said facing engaging at each delivery stroke of the pump only a small marginal area of the body around the delivery opening with which the delivery passage registers, means for operating the pump, means for rotating the distributor with a step by step motion to bring the end of the delivery passage 2. Apparatus for delivering liquids, comprising a hollow body .including a casing, one end of which is closed by a flanged cap, the flange of which has a plurality of delivery openings, and a ring within the casing and secured to the inner face of the flange of the cap, said ring having an equally spaced circular row of delivery openings extending through it from side to side, which openings register with openings through the flange, a rotary distributor arranged in said bodyvco-axially with said row of openings, a

pump in said distributor, a radial arm on said distributor, said pump -andsaid arm having a delivery passage successively into register with the ends of eachof said delivery openings in the ring, said pump having a plunger reciprocating in the distributor parallel to the axis thereof, and means for transmitting the pressure of said piston, on the working stroke only, to the rotary distributor to eflect a pressure seal besuccessively into register with the ends of eacl of said delivery openings, said means operating between the delivery strok'es.

5.Apparatus,for delivering liquids, comprising a hollow body through one end of which extends a plurality of delivery openings, the inner ends of which are. disposed in a circular row, a rotary distributor arranged in said body coaxially with said row of openings, a pump cylinder in said distributor, the axis of the cylinder being at right angles to a plane containing the inner ends of said-delivery openings. a two-part pump plunger'in said cylinder arranged with a tween the facing on' its arm and-the side of the ring. a

- 3. Apparatus for delivering liquids, comprising a hollow body including a casing, one end of which is closed by a flanged cap, the flange of which has a plurality of delivery openings and a ring secured to and, projecting within the casing, said ring having an equally spaced circular row of delivery openings extendingthrough it from side to side, which openings register with openings through the flange, a rotary dis tributor arranged in said body co-axially with said row of openings, a pump in said distributor, a radial arm on said distributor, said pump and said arm having a delivery passage for liquid,

said arm having a facing engaging one side of the ring, and the delivery passage extending through said facing and registering in turn with the delivery openings through the ring, means for operating the pump, means forrotating the distributor with a step by step motion to bring the end of the delivery passage successively into register with the ends of each of said delivery openings in the ring, said pump having a plunger reciprocating in the distributor parallel to the axis thereof, and means for transmitting the pressure of said piston, on the working stroke only, to the rotary distributor to effect a pressure seal between the facing on its arm and the side of the ring.

4. Apparatu for delivering liquids, comprising.

a hollow body through one end of which extends a plurality of delivery openings, the inner ends of which are disposed in a circular row,

a rotary distributor arranged in said body co.-'

axially with said row of openings, apump cylinder in said distributor, the axis of the cylinder being at right angles to a plane containing the inner ends of said delivery openings, a two-part pump plunger in said cylinder arranged with a gap between their inner ends, said cylinder having liquid'inlet anddischarge ports which are spaced apart along the length of the cylinder,

means for'reciprocating. one part of the pump plunger, means on the other part of the pum plunger for engaging an abutment in fixed relationship with the distributor during the delivery or inward movement of the first part of the pump plunger, so that the pressure thereon is transmitted to the distributor during delivery only, a radial arm on said distributor, said pump and said arm having a delivery passage for liquid, said arm having a facing engaging said body and the delivery passage extending through said facing and registering in turn with the ends of each of said delivery openings and means for gap between their 'inner ends, means for adjusting the length of. said gap, said cylinder having liquid 'inlet and disbharge ports which are spaced apart along the length of the cylinder, means for reciprocating one part of the pump plunger, means on the other part of the pump plunger for engaging an abutment in fixed relationship with the distributor during the delivery or inward movement of the first part of the pump plunger, so that the pressure thereoneis transmitted to-the distributor during delivery only, a radial arm on said distributor, said pump and said arm havingia delivery passage for liquid, said arm having a facing engaging said body and the delivery passage extending through said facing and registering in turn with the ends of each, of said delivery openings, and mean for rotating the distributor with a step by step mot-ion to bring the end of the delivery passage successively into register with the ends of each of said delivery openings, said means operating between the delivery strokes.

6. Apparatus for delivering liquids, comprising a hollow body through one end of which extends a plurality of delivery openings, the inner ends of which are disposed in a. circular row, a rotary distributor arranged in said body co-axially with said rowof openings, a pump in said distributor, a radial arm on said distributon said pump and said arm having a delivery passage for liquid,

' said arm having a facing engagin said body and the delivery passage extending through said facing and registering in turn with the ends of each of said delivery openings, means for operating the pump, means for rotating the distributor with a step by step motion to bring the end of the delivery passage successively into register with the ends of each of said delivery openings, said means operating between the delivery strokes, said pump having a plunger reciprocating in the distributor parallel to the axis thereof, and means for transmitting the pressure of said plunger, on

the working stroke only, to the rotary distributor,

the area of contact between the contacting faces of the delivery arm and the member having the conduits, and the cross sectional area of the derotating the distributor with a step by step motion to bring the end of the delivery passage .of which are disposed in a circular row, a rotary distributor arranged in said body co-axially with said row of openings, a pump in said distributor,

a radial arm on said distributor, said pump and said arm having a delivery passage for liquid, said arx'n having a branch passage provided with a relief port controlled by a spring-loaded valve,

and a facing for engaging the body, the delivery said facing engaging at each delivery stroke of the pump only a small marginal area of the body around the delivery opening with which the delivery passage registers.

8. Apparatus for delivering liquids, comprising a hollow body through one end of which extends a plurality of delivery openings, the inner ends of which are disposed in a circular row, a rotary distributor arranged in said body co-axially with said row of openings, a pump cylinder in said distributor, the axis of the cylinder being at right angles to a plane containing the inner ends of said delivery openings, a two-part pump plunger in said cylinder arranged with a gap between their inner ends, said cylinder having liquid inlet and discharge ports which are-spaced apart along the length of the cylinder, a spring-loaded cap slidably mounted in one end of the distributor, said cap bearing on the end of one part of from the second part of the-pump plunger 'during the delivery stroke, a radial arm on said distributor, said pump and said arm having a delivery passage for liquid, said arm having a facing engaging said body and the delivery passage extending through said facing and registering in turn with the ends of each of said delivery openings, and means for rotating the distributor with a step by step motion to bring the end of the delivery passage successively into register with the ends of each of said delivery openings, said means operating between the delivery strokes.

9. Apparatus for delivering liquids, comprising a hollow body through oneend of which extends a plurality of delivery openings, the inner ends of which are disposed in a circular row, a rotary distributor arranged in said body co-axially with said row of openings, a pump cylinder in said distributor, the axis of the cylinder being at right angles to a plane containing the inner ends of said delivery openings, a two-part pump plunger in said cylinder arranged with a gap between their inner ends, said cylinder having liquid inlet the inner surface'of the end of said cap, a flange on said second pump plunger part, a spring within the cap acting on said flange, said second pump plunge-r part extending through the end of said cap, a sleeve fixed on the end of said second plunger part exterior to the cap, an adjusting pin extending transversely through the adjacent part of said hollow body, said pin engaging said sleeve for adjusting the length of the gap between the inner ends of the two pump plunger parts, a radial arm on said distributor, said pump tributor to efiect a'pressure seal between the 10 1 of said delivery openings, and means for rotating the distributor with a step by step motior to bring the end of the delivery passage successively into register with the ends of each of said delivery openings, said means operating between the delivery strokes.

10. Apparatus for delivering liquids," comprising a hollow body through one end of which extends a plurality of delivery openings, the inner ends of which are disposed in a circular row, a rotary distributor arranged in said body co-axially with said row of openings, a pump in said distributor, a plurality of radial arms on said distributor, said pump and one of said arms having a delivery passage for liquid, said arms engaging said body, and the arm with the delivery passage having a facing through which the passage extends, the end of said passage registering in turn with the ends of each of said delivery openings, means for operating the pump, means for rotating the distributor with'a step by step motion to bring the end of the delivery passage successively into register with the ends of each of said delivery openings, said pump having a plunger reciprocating in the distributor parallel to the axis thereof, and means for transmitting the pressure of said plunger, on the working stroke, to the rotary disdistributor, a radial arm on said distributor, said pump and said arm having a delivery passage for liquid, said arm having a facing engaging said and said arm having a delivery passage for liquid,

, said arm having a facing engaging said body, and

the delivery passage extending through said facing and registering in turn with the ends of each body and the delivery passage extending through said facing and registering in turn with the ends of each of said delivery openings, means for operating the pump, a ratchet wheel fixed on the distributor concentrically with its axis, a ring mounted on said distributor for oscillatory movement, means for oscillating said ring, a pawl carried by said ring and engaging the ratchet Wheel, a stationary ratchet Wheel mounted adjacent the distributor and having its teeth directed oppositely from the teeth of the ratchet wheel on the distributor, a. pawl on the distributor traversing the teeth of said stationary ratchet wheel, said pump having a plunger reciprocating in the distributor parallel to the axis thereof, and means for transmitting the pressure of said plunger, on the working stroke, to the rotary distributor to effect a pressure seal between the facing on its arm and the part of the body'with which it engages.

12. Apparatus for delivering liquids, comprising a hollow body through one end of which extends a plurality of delivery openings, the inner ends of which are disposed in a circular row, a rotary distributor arranged in said body ccaxially with said row of openings, a pump in step motion to bring the end of the delivery passage successively into register with the ends of each of said delivery openings, said pump having a plunger reciprocating in the distributor parallel to the axis thereof, and means for transmitting the pressure. of said plunger, on the working stroke, to the rotary distributor to eifect a pressure seal between the facing on its arm and the part of the body with which it engages.

13. Apparatus for delivering liquids, comprisl0 ing a hollow body through one endof which extends a plurality of delivery openings, the inner ends of which are disposed in a circular row, a rotary distributor arranged in said body doaxially with said row of openings, 9, pump in said 15 distributor, a radial arm on said distributor, said pump and said arm having a delivery passage for liquid, said arm having a facing engaging said body and the delivery passage extending through said facing and registering in turn with the ends of each of said delivery openings, means for operating the pump, a ratchet Wheel fixed: on the distributor concentrically with its axis, a ring mounted on said distributor for oscillatory movement, a bearing hub fixed within said hollow body, a face cam mounted on said hub for rotation, means for rotating said cam, said cam operating the pump, an eccentric pin projecting axially from the end of said earn, a slotted arm on said ring, means on said eccentric pin engaging in the slot of the arm for oscillating the ring as the cam rotates, a pawl carried by said ring and engaging the ratchet wheel, a stationary ratchet wheel mounted adjacent the distributor and having its teeth directed oppositely from the teeth 5 of the ratchet wheel on the distributor, a pawl on the distributor traversing the teeth of said stationary ratchet wheel, said pump having a plunger reciprocating in the distributor parallel to the axis thereof, and means for transmitting 4 the pressure of said plunger, on the working stroke, to the rotary distributor to eifect a pressure seal between the facing on its arm and the part of the body with which it engages.

14. Apparatus for delivering liquids, comprising a hollow body through one end of which extends a plurality of delivery openings, the inner ends of which are disposed in a circular row, a rotary distributor arranged in said body co-axially with said row of openings, a pump in said distributor, a radial arm on said distributor, said pump and said arm having a delivery passage for liquid, said arm having a racing engaging said body and the delivery passage extending through said facing and'registering in turn with the ends of each of said delivery openings, a bearing hub fixed within said hollow body, a face cam mounted on said hub for rotation, means for rotating said cam, an idler arm pivoted within the hollow body having a portion engaged by said cam and a openings, said pump having a plunger recipr'oeating in the distributor parallel to the axis thereof, and means for transmitting the pressure of said plunger, on the working stroke, to the rotary distributor to effect a pressure seal between the facing on its arm and the part of the body with which it engages.

l2 15. Apparatus for delivering liquids, comprising a hollow body through one end of whichextends a plurality of delivery openings, the inner ends of which are disposed in a circular row, a rotary distributor arranged in said body co-axially with said row of openings, a pump in said distributor, a radial'arm on said distributor, said pump and said arm having a delivery passage for liquid, said arm having a facing engaging said body and the delivery passage extending through said facing and registering in turn with the ends of each of said delivery openings, a bearlnghub fixed within said hollow body, a face cam mounted on said hub for rotation, a worm wheel fixed to said cam, a worm shaft mounted on bearings in the body, a worm on said shaft engaging said worm wheel, means for rotating the distributor with a step by step motion to bring the end of the delivery passage successively into register with the. ends of each of said delivery openings, said pump having a plunger reciprocating in the distributor parallel to the axis thereof, and means for transmitting the pressure of said plunger, on the working stroke, to the rotary distributor to effect a pressure seal between the facing on its arm and the part of the body with which it engages.

16. Apparatus for delivering liquids, comprising a hollow body, through one end of which extends a plurality of delivery openings, the inner ends of which are disposed in a circular row, a rotary distributor arranged in said body co-axially with said row of openings, a reciprocating pump in said distributor, an outwardly projecting arm onsaid distributor, said pump and said arm having a delivery passage for liquid, said arm engaging said body, and the delivery pass sage extending through said arm and registering in turn with the ends of said delivery openings said arm engaging the body, at each delivery stroke of the pump, over a small marginal area only around the delivery opening with which the delivery passage registers, means for operatingthe pump, means for rotating the distributor with a step by step motion to bring the end of the delivery passage in the arm successively into register with the ends of said delivery openings, said pump having a plunger reciprocating in the distributor parallel to the axis thereof,

and means for transmitting the pressure of said plunger on the working stroke' only and when the distributor is stationary only, to the distributor to effect a pressure seal between the end of the said arm and the part of the body with which it engages.

HARRY PARKER.

THOMAS CARLYLE ELLISON ROWLAND.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 584,033 'Capitaine June 8, 1897 2,157,970 Rowland et al, May 9, 1939 FOREIGN PATENTS Number Country Date 386,131 Great Britain 1933 480,978 Great Britain 1938