US1338338A - Oil-feed pump for internal-combustion engines - Google Patents

Description

H. W. SUMNER.

OIL FEED PUMP FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED JULY 3.191s.

Patented Apr. 27, 1920.

H. W. SUMNER.

OIL FEED PUMP FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED JULY 3, .1918- n llllll I u. H 1 ||IH attouwq UNITED sTAtrns PATENT OFFICE.

HENRY w. SUMNER, or SEATTLE, WASHINGTON.

OIL-FEED PUMP FOIt INTERNAL-COMBUSTION ENGINES.

Application filed July 3,

good shape. It also comprises an attach ment whereby a visible indication is promptly given of the occurrence of any obstruction in the pump which tends .to interfere with its operation and delivery of the proper amount of oil.

. The objects. of my invention may be determined by an inspection'of the specification and the claims thereof. I

The particular features of my invention I which I consider to be new and upon which I desire av patent will be described in the following specification and set out in detail in the claims.

In the drawings, I'have shown my inven- -tion in a type of construction which I' now prefer, although aware that many of the details might be changed without, however, changing the principles employed.

Figure 1 is a side view or elevation'of a pump having my invention incorporated therein and the means for operating said pump, a portionof the pump actuating mechanism being shown in section.

Fig. 2 is a longitudinal section through the pump proper, that is, the cylinder with the valve mechanism.

One of the objects sought in producing this pump is a mechanism wherein the parts which constitute the wearing members, may be made so that they are easily removable and also easily renewable, and of such character; of construction that their manufacture consists of simple operations which ,may be The pump is of that. type known as aplunger pum I The plunger 1 is a plain cylinder. ThlS enters a casing 2, which casing is bored, said bore being in two sections of different diameters. The lower section,

Specification of Letters Patent. Patented Apr, 2'7, 1 920.

1918. serial No. 243,215.

20, is a bore of a diameter to fit the plunger 2 1, the other section 21 is of a larger diameter. The plunger is intended to fit closely in the smaller section 20 of the bore, although this fit is hardly intended to be of such character as to be relied upon solely to prevent escape of the oil.

The outer portion, or main body, 10, of the plunger, has secured thereto, an inner end section 12, which latter is the operating member of the plunger and this is made a close, accurate fit within the casing and inthe sleeve 3 which is placed in the. larger portion of the bore ofthe casing. This removable head 12, is made of hardened metal and of as accurate a fit as it is feasible to make and securefree reciprocative move-' ment. body 10 of the plunger, so that, when. de-

sired, it may be removed and another head substituted therefor.

A convenient manner of doing this is that illustrated in Fig. 2. The head 12 is provided with a T-shaped flange which fits a corresponding groove formed in the body 10 of the plunger. These'two parts are readily removed by relative transverse movement, but are securely locked together and held in alinement while in working position in the pump.

' The sleeve 3 which fits in the inner or bottom end of thelarger portion 21 ofthe bore It is removable and secured to the in the casing, has an external peripheral groove 30, whichis connected with the central bore of the sleeve through ports 31. The casing 2 is provided with a port or opening, 22, for connection therewith of the oil supply pipe. This is positioned so as to register with the peripheral groove 30- these, the extent ofthis travel beyond the port determining the amount of fuel which is delivered at each stroke. It is seen that the plunger forms its own valve.

Locked above the sleeve 3, within the 09s 'ing, is a valve containing sleeve 4. This sleeve is centrally bored, forming a cylinder for the reception of the valve sleeve 44. At its lower end, this bore is reduced in diameter and forms a discharge }port 41, through which'the oil is forced by t e plunger. Surrounding this, is a valve seat 40.

Just above the valve seat is an exteriorly recessed peripheral groove 42; that is, this groove is in the wall'of'the sleeve, and extends outward from the bore within which the valve fits.

The valve 44 is a thin shell or cylinder, having its lower .end closed and shaped to accurately fit the valve seat 40. Just above this lower end or valve head, it has ports 43, which register with the groove 42. The sleeve '4 is held downward-against the adj acent end of the cylinder sleeve- 3. in any suitable ,manner. The means illustrated and which I prefer to use, is a sleeve 5 which has a head 50 engaging the upper, end of the sleeve 4.

The stem of this sleeve 5 is surrounded make a tight joint between the head 50 and the upper end of'the sleeve4 while the lower end of the sleeve 4 may directly contact with the upper end of the sleeve I prefer, in order to insure a tight joint,

to use a packing ring 52, which is placed between slightly coned surfaces on the ends of the two sleeves 3 and 4. This ring may be of copper or other relatively soft metal. It will thus compress or flow a sufficient amount to insure tightness in the joint between thetwo sleeves and also a tight joint against the surfaces of the casing. The

' whole device is thus made absolutely secure aga'instleakage. 4 v The valve 44 is normally held down upon its seat by a spring 45 which, at its upper end, bears against the lower end of the sleeve 5. sleeve 5 is a pipe 53 which forms the pi )'e for the discharge of the oil. This pipe may be brazed or otherwise securely heldin the sleeve 5 and leakage between the pipe and thesleeve thus prevented. At the lower end ofthe casing, I have provided a gland ,or

stuffingbox 13, which may be employed-as an additional means'for' securing against leakage of the oil about the plunger. This may i be of any usual orsuitable construction.

' The means which I prefer to emplo for operating the plunger is shown in Fig. 1.

er 1, isscrew The lower end of the plun threaded into-a sleeve 6. hissleeve has sliding. and guiding engagement within a bore formed in a member 60 of the frame or of a member which is secured. to the frame. The sleeve has a stem 61, extendmg downward and through a hole formed I in the cross head or slide block 7, the latter by the frame.

Within the central bore of the being guided in suitable members carried The bolt 61 is loose in the block 7 to the extent that relative reciprocation between the two is freely possible. At its lower end the bolt' 61 is provided. with a nut 62 which limits upward movement of the bolt relative to the slidingblock 7. l

At the upper end of the block- 7 is a washer 70, which is provided, on its upper surface, with suitable seats for two coiled springs 71 and 72. The outer spring 71, at its upper end, bears against a member of the frame or a member which is fixedl secured upon the frame. The function 0 this spring is to secure the downward or return movement of the block? and also of the pump plunger which is connected therewith. For convenience in adjusting the initial tension placed upon this s ring, I have provided a threaded sleeve 3, which acts as the direct support for the washer 70. This sleeve 73 isthreaded into a member carried by the frame so that it may be adjusted vertically, thereby making it possible to vary the initial tension of the spring 71.

The inner spring 72, acts in compression between the washer 7O and'the head 6 and constitutes the member through which the effort required to actuate the plunger under normal conditions without being com: pressed, and yet be capable of giving, in case any obstruction enters the pump, is lessened thereby preventing a possibility of over straining or breaking the pump or its operating parts. In case of obstruction of this sort, the extent of stroke of the pump plunger will be reduced. In order to give visible warning 'of this, I have provided what I call a telltale, the same consisting of a small wire or rod 8, which is secured at one end to washer and therefore has a movement which corresponds exactly with that of the reciprocating head, '7. At its upper end its tip is [placed adjacent. to and in exact relation with some part of the plunger ,or a part connected to or moving .in correspondence therewith. As shown, ,it is in exact registry with the shoulder of the head 6. If, during theoperation of the pump, relative movement. between this tell-tale finger and the cam roller ortappet 94, which is engaged by a cam 95 carriedby a rotating shaft96,

the latter being turned in any suitable man-' nerfrom the engine shaft. The means employed for reciprocating the head 7 are, however, no part of this present invention. Any suitable means for reciprocating the same may be employed.

It is believed that the operation of the device is evident from the above description and drawings. The oil supply flows freely to the groove in the pump and the plunger acts after the mannerv of an ordinary plunger to force the oil through the ports 41, 42, and 43, and thence through delivery pipe In order to clean the pump, it is only necessary to remove the nut 51 and it is then possible to take out all the sleeves contained within the casing, clean them, replace them or insert substitutes. It thus possible to quickly correct any operating trouble in the pump. All the parts of this pump are of such character that they may be cheaply and accurately made and parts may be kept on hand for replacing those which may not be giving satisfaction.

\Vhat I claim asmy invention is: 1. In an 011 feed pump For lnternal'combustion engines, a plunger body and a plunger head of like diameter, said head being removablysecured to the.body, and a cylinder casing having a bore in which the plunger is reciprocable, said bore being of a size to fit closely about the plunger I throughout the path of travel of the joint between the head and body.

' 2. In an oil feed pump for internal comsecured to the body to resist axial separation and freely removable therefrom by relative movement transversely of their axis, and a cylinder casing having a bore in which the plunger is reciprocable, saidborebeing of a size to fit closely about the plunger. throughout the path of travel of the joint between the head and body.

3. An oil feed pump for internal com- 'bustionengines having a plunger body and a plunger'head' both of like diameter, one

of said members having a transversely extending tongue in its end and the other -member having a transversely extending groove in its adjacent end fitting about the tongue in the first member, and ada ted to prevent relative axial movement't erebe' tween.

4. In an oil feed pump for internal 'combustlon englnes a casing havin an oil sup- ."ply' port, :a-cylmder sleeve fittmg said cas- .60.

".' "s1ee've h'avinga peripheral groove communimg and :removably secured therein, said eating with said port, and ports extending from said groove to the central bore, and a. plun er fitting said bore of the sleeve. 5. In an oil feed pump for internal combustion engines, a casing having a cylindrical bore and an oil admission port, a cylinder sleeve fitting said hole and provided with a peripheral groove registering with said port and ports connecting said groove a cylinder sleeve fitting the larger part of said bore and'the plunger and havmg an exterior peripheral groove and ports connecting this groove with its bore, a valve sleeve fitting the casing and holding down the cylinder sleeve, a valve in said latter sleeve and a discharge pipe communicating with the bore of the valve sleeve.

7. In an oil feed pump for internal combustion engines, a cylinder, a plunger fitting said cylinder, a sleeve fitting the cylinder and having a valve seat within its bore, and an outwardly recessed groove just within the valve seat, a valve having a tubular body fitting the bore in said sleeve and ports registering with the recessed groove of the sleeve.

'8. In an oil feed pump for internal com bustion engines, a cylinder, a plunger fitting said cylinder, asleeve fitting the cylinder 1 00 bustion engines, a plunger mechanism having two parts, one connected with the actuating means for positive movement and a spring connecting this part with the other, and a tell-tale finger connected with oneof these parts and extending to a position'ad jacent the other part.

10. In a fuel feed pump for internal combustionengines, a plunger actuating means I20 comprising two parts connected to move together, one of said parts being positively connected with the plunger actuating mechanism and the other with the plunger, a-

spring forming the actuating connection between said two parts, and a tell-tale finger actuated by one of said parts and having an end adjacent to the other part.

11. In afuel feeding pump for internal combustion engines, a plunger actuating -other havin a positive connection with the plunger, a olt connecting said. parts andlimitlng their separation, a spring forming Y the plunger driving connection 'betweensaid parts and a tell-tale finger carried by one of said parts and extending adjacent to the other part,

12. In' a fuel feed pump for. internal combustion engines, a plunger mechanism having two parts, one positlvely connected with the actuating means and the other with the plunger, a spring acting .to hold apart said parts, and means for limiting the separation of Said parts.

Signed at Seattle, -Washington, this 25th day of June, 1918.

HENRY w. SUMNER;

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