US1835919A - Pump with deformable diaphragm - Google Patents

Description

Dec. 8, 1931. c. R. wAsElGE PMP WITH DEFORMABLE DIAPHRAGM Filed April 24, 192s 3 sheets-sheet 1 Figi Dec. 8, 1931. C. RAWAs-ElGE LSB-5,919

PUMP WITH DEFORMABL DIAPHRAGM Filed April 24, 1928 3 Sheets-Sheet 2 IWW l//l//l/ lll/l o: c? P0 FE m N Y l CRn/Sge Dec. 8, 1931. c. R. wAsElGE 1,835,919

PUMP WITH DEFORMABLE DIAPHRAGM Filed April 24, 1928 3 Sheets-Sheet 3 Patented Dec. 8, 1931 UNITED STATES NP xrlsla'r OFFICE CHARLES RAYMOND WASEIGE, F RUEIL, FRANCE, ASSIGNOR T0 HENRI ET MAURICE FARMAN, 0F BILLANCOURT, SEINE, FRANCE PUMP WITH DIEIFORMABLE IDIAPHRAGIMI Application led April 24, 1928, SerialiNo. 272,551, and in France May 17, 1927.

The present invention relates to various improvements in pumps of the type comprising elastic diaphragms and one or more pump bodies, adapted for use with petrol, hydrocarbons and other solvents for lubricants, or

for like purposes. The said improvements consists in a better arrangement of the several parts of the pump, which may comprise one or more diaphragms. By this improved arrangement, I am enabled to reduce the size and weight of the pump, to Simplify its manufacture and upkeep, and chiefly to directly control it at higher speed than can be employed in the known pumps of this t pc.

yIn this manner, I am enabled to utilize diaphragms having a small diameter and a high rate of pulsation, and thus to obtain a large output with a small sized apparatus. Furthermore, when the said construction comprises several diaphragme, the functioning of the said diaphragms will be quite independent.

The principal characteristics of the inven tion are set forth in the following description with reference to the appended drawings which are given solely by way of example.

Fig. l is a section on the line 1-1 of Fig. 2.

Fig. 2 is a section on the line 2-2 of Fig. 1.

Fig. 3 is an external view of the pump, viewed from the driving end.

Fig. 4 is a modified form ofthe pump body,

Vby which the part of the diaphragm opposite the valve boxes is directly connected with the atmosphere.

In the construction herein represented, the two pump chambers A and B, provided with their usual boxes, are placed on the respective sides of the main body C of the apparatus. The multiple diaphra gms D are disposed between the main bodv C and the said pump chambers. The said diaphragms are held between the discs T T with which they are adapted to make contact in both directions. The disc T is movable with a very small diametrical play, thus forming a piston whereby the efficiency is increased. The motion of the said diaphragms in the deliverv stroke is limited bv the stop screws E which are secured to the covers provided with valves, said motion being caused by the action of one or more springs F, which abut against the respective diaphragms and are d1s osed in the interior of the lianged members which are' guided by the respective pieces H. The motion of the diaphragms in the suction stroke is limited by the stops Y which are secured to the said main body and are disposed at the periphery.

This motion in either direction is effected by the rocking members I which are pivotally mounted at O upon the axles K which are secured to the main body and are provided with forked brackets L coacting-by means of the rollers M-with the flanges G-G.

The arm N of the said rocking members car-v ries a roller P adapted to roll upon the cam R.` Each of the said rocking members is4 actuated by a separate cam, mounted on the cam shaft S which is rotatable in suitable rings mounted on the main body of the apparatus, and is provided on one side with an actuating pinion or other suitable driving means Z.

When the roller of the said rocking memthe inner circle of the cam, the diaphragm will be driven into the delivery position by the action of the springs. Since the two cams occupy a like position with reference to the shaft, the roller of the second rocking member will now make contact/with the outer circle of the second cam; the corresponding diaphragm is in the withdrawing position, and the springs are caused to bear upon said cam, through the medium of the member G and the said rocking device.

The alternate motion of said diaphragme is eiected by the rotation of the cam shaft, actuated by said rocking members whose position is symmetrical with reference to the said shaft, as indicated in Fig. 1; .one diaphragm is in the discharge position, and the other diaphragm is concurrently in the suction position. In this manner the spring is subjected solely to an alternate motion, without any marked compression of the coils.

I am ythus enabled to obtain..-the proper proportion between the moment of the delivery and the moment of the suction, by a ber, on the side next the cam, is situated on suitable choice of the outline of the cams. It is a known fact that in the case of diaphragm pumps operating upon a high frequency of pulsations, the suction period should be the maximum, and that an inactive period must be allowed between the suction effect and the delivery effect, in order that the valves may drop freely.

The self-regulat-ion is automatic, as will be observed by an examination of Fig. l. When the delivery tends to diminish due to a stoppage of the conduit, for inst-ance when a cock is closed on either or both of the pumps, since the liquid is practically incompressible the said diaphragme will move at the same time towards the interior of the main body of the apparatus. The diaphragms thus compress the springs, and the said rocking devices cease to act on the flanged members, so thatthe cam shaft rotates without load. When only one of the pumps has its delivery checked, the corresponding diaphragm compresses the spring until the extreme suction position is att-ained, this position being determined by the contact between the washer of the diaphragm T and the stops Y mounted on the main body of the apparatus. The said stops are placed in such manner that when in this extreme position of the said diaphragm a certain play will be a1- lowe'd between the roller of the said rocking device and the outer periphery of the cam.

The said apparatus can be lubricated on the splashing system.

Should one of the said diaphragms be broken, gasoline might thus enter the general mechanism, which would offer prejudice to the proper oiling of the cams and the coacting rocking devices, and to this end I provide an ofl'take pipe V, of Siphon shape, whereby the gasoline is led to the exterior. The said diaphragm (thus free from all defective action can herein operate for a certain length -of tlme, and without breakdowns of an immediate nature.

In the case in which the pump comprises a single diaphragm, the said reaction spring abuts upon the main body of the apparat-us or upon a cover.

Each pump is preferably provided with a iilter through which the gasoline is circulated from the exterior to the interior, and in this manner the wire gauze can be readily cleaned.

In the modified form of construction Which is shown in Fig. 4, the chamber Q is disposed between each of the said diaphragms and the main body of the apparatus; said chamber is provided with an atmospheric outlet. In this manner the motion of the said diaphragm in the casing of the apparatus will not produce a pressure, or

an excess of pressure, whereby the pressure of the pump delivery will be made irregular.

Furthermore, in this modified construction, should one of the said diaphragms be broken, ,the gasoline will be at once discharged to the exterior, without any appreliension that it will be mixedwith the lubricating oil. shown in Fig. 4. The atmospheric connection is effected by the pipe W, by which any leakage of gasoline wi-llbe led directly into the interior of the aeroplane body.

kmembers, means for positively actuating said pumping members in the suction strokes, said means comprising a cam-shaft, two cams of identical outline and angular disposition on said cam-shaft, two parallel rocking members, one end of one rocking member being adapted to engage one cam on one side of said cam-shaft, the'oorresponding end of the other rocking member being adapted to engage the other cam on the opposite side of said cam-shaft, the other ends of said rocking members cooperating with said pumping members respectively, whereby said pumping members and said spring are normally moved as a whole by said rocking members and said pumping members may assume relative displacements against the force of said spring, means for supplying liquid to said casing and means for discharging liquid from said casing.

In testimony whereof I have signed my name to this specification.

CHARLES RAYMOND WASEIGE.

This modified construction is.

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