US1181325A - Air-pump. - Google Patents

Description

H. W. LOCKLEY.

AIR PUMP. APPLICATION FILED DEC.|6,1914.

Iatented May? 7 2 SHEETS--SHEET v Elnoanioao 1 W LOCKLEY Witnemo H. W. LOCKLEY.

Alfi PUMP.

APPLICATION FILED 05c. 16, 1914.

Patented May 2, 1916.

2 SHEETS-SHEET 2 H W- LOCKLE-Y Still anotherobject is to provide an ecceni am .325.

I tun" arenas raarnnr HAIKRY W. LOCKLEY, L NEW CASTLE, PENNSYLVANIA, ASSIGNOR TO KELLOGG MANU- EACTURING COMPANY, OF ROCHESTER, NEW YGBK, A COEPORATIOII OF NEW YORK.

Alli-YUM? Specification of Letters Patent.

Patented May 2, 1916.

Application filed'December 16, 1914. Serial Ho. 877,575.

To all whom it may concern:

Be it known that I, HARRY W. LocnLnr, a

v citizen of the United States, residing at New Castle, in the county of Lawrence and State of Pennsylvania, have invented certain new and useful Improvements in Air-Pumps, of

' which the following a specification, refer.- Y ence being had'to the accompanying draw- My invention relates to pumps, and particularly to pumps designed to be used for the inflation of the tires of automobiles.

The primary object of my invention is the provision of a strong, durable, simple and yet highly effective air pump which may be economical to manufactureand in which the parts may be readily assembled or disassem bled for repair or replacement.

As further ob ect the provision of a crank case So formed that it may be cast or.

, otherwisev formed in one integral piece, thus preventing leakage n the crank case which the valve-housing for inclosing the inlet and outlet valves of the pump.

trio for operating the piston to thereby secure steadiness of operation and strength,

provide the piston with guide members embracing the eccentric shaft and the ecccntrio, and holding the piston from lateral motion and in proper alinement with the cylinder, thus securing greater efficiency and durability of 'thepurnp by reducing friction and strain. I

Still another object of the invention is to so construct the pump that the stroke of the piston maybe relatively long in proportion to the diameter thereof, thus reducing strain and tending to permit very free operation of the piston with a relatively high efficiency. I

Ea'till another object is to so construct the eccentric and the shaft that the eccentric may be forced or pressed on the shaft, and so that the eccentric and shaftmay be read ilyassembled in a crank case cast or formed in one piece.

Still another object is to provide the crank case with oppositely disposed air inlet open- Still another object is to provide means I whereby the pump may be readily operatively connected to a driving gear wheel or disconnected therefrom, and provide a ship-; per lever for this purpose and novel means fcrholding the shipper lever in its adjusted positions.

Other objectswill appear in the course of the following description.

My invention is illustrated in the accompanying drawings, wherein Figure l is a side elevation of my improved the pump; Fig. Qis a vertical section on the line 2-2 of Fig. 3; Fig. 3 is a vertical section on the line 3-3.0f Fig. 2; Fig. 4

is a fragmentary section through the arm 42 and the shipper lever; Fig. 5 is a fragmentary section showing one of the air openings in the crank case and its cap elevated.

Corresponding and like parts are referred to in the following description and designated in all parts of the accompanying drawings by like reference numerals.

Referring to the drawings, 2 designates generally the'crank case of my improved pump. This case'has the form of a partial cylinder closed at its ends by means of the walls 3 and having a base 4. One end wall 3 is provided with an inwardly projecting annular flange 5 and the other end wall is provided with an inwardly projecting flange 5 and an outwardly projecting flange 6.

Bearing sleeves 7 are disposed in these openings surrounded by the Walls 5 and 6, and mounted in these bearing sleeves is the shaft 8. I

The upper end of the crank case is open and is formed with an annular flange 9 forming an annular seat for the cylinder 10. This cylinder 10 is secured to the crank case in any suitable manner, and is formed at its upper end with an integral valve housing 11. This valve housing is cast with the cylinder and afterward milled out to provide an air inlet assas e 12 and an air outlet )assa e 13. o l

and to form a passage for a valve stem 18 and the valve seat 20, the air passage'lQ is milled out only for a portion of the depth 8* is the eccentric 25.

of the valve housing and the web left is drilled out as at 12 to form holes permitting the passage of air. and yet allowing suiiicient of the original casting to remain to form a spider supporting the central annular guide 14. The valve passage 13 at its upper end is slightly flared and interiorly screw threaded, thedower end of the valve passage 13 being contracted to form a valve seat.

A ball valve 15 normally rests upon this valve seat and is held in place by a spring 16, in turn held in position by en aging against the wall of the flared orifice ormed in the lower end of an elbow 17, this elbow being exteriorly screw threaded at opposite ends, one of these ends engaging the screw threads of the valve passage 13, the other being adapted to be connected to any suitable tubular conductor through which the compressed air may be carried to the point where it is desired to house it.

Mounted within the annulus 14 is a valve spindle 18 carrying at its lower end a valve 19 seating upward against the valve seat 20 formed at the lower end of the wall surrounding the passage 12. A coiled spring 21 surrounds the annulus 14 and at its lower end bears against the spider supporting this annulus, and at its upper end ears against the washer 22 carried upon the end of the spindle 18 and held in place by a pin :23. The upper end of the air passage 12 is partially closed or covered by means of a cap 24 which is spaced from the upper end of the Wall of the valve passage to admit air, but protects the valve passage, and the valve .therein from the lodgment of dirt and dust.

Mounted in the bearings formed in the crank case is the shaft 8, as previously stated, and keyed upon this shaft by a key Mounted upon the eccentric and of course surrounding the same, is an eccentric ring or band 26 which has formed with it the radially projecting lug 21. This lug is perforated for the passage of the wrist pin 28, this wrist pin being held in place by means of a set screw entering the lug 27.

The piston 29 may be of any suitable construction, but is formed with the wardly projecting laterally spaced members 30 which are vertically slotted as at 3 1 so as to provide four depending guide fingers 32. The slot 31 is of a size just sufiicient to receive shaft 8, so that the walls of the slots 31 will be guided against the shaft 8. The members 30 are spaced apart, as illustrated in Fig. 3, a distance just suiiicient to receive between them the eccentric and the eccentric ring. Furthermore, it will be seen from Fig. 3 that the outer faces of these members 30 have sliding engagement with-and are guided by the inwardly extending annular flanges 5. By this construction the depending members 30 are so supported that down- 'these depending members will be prevented lation to the longitudinal axis 0' the cylinder 10, and the piston will be prevented from unequal wear and thus reduce friction.

and strain. Preferably the members 30 are formed integral with the body of the piston.

It will be noted from Fig. 3 that the upwardl extending walls of the crank case are pr'ovi ed with the inwardly extending flanges 33, and that these flanges, together with the flanges 9, su port an annulus ofrfelt or other suitab e material, designated 34. These flanges form bafiies which tend to keep the oil within the crank case. The felt washer or pad'34 will absorb any small quantities of oil which the baflies have failed to keep in the crank case,

and thus this felt ring or washer 34 is kept u When the slightly moist with bricant. plston is lowered it contacts with this compressible ring or washer 34, and the oil from the washer is forced' outward at the ex tremrty of the suction stroke of the piston,

thus providing for the proper lubrication and which retained in position will depend upon the direction of movement of the eccentric, that cap being retained to close the opening 35 which if removed would permit the oil to be thrown out through the opening 35 upon the rotation of the eccentric. The lower end of the crank case is provided. with an oil cup designated 37. This is the only portion of the pump where it is necessary to introduce the lubricant, and this oil cup also provides for overflow and prevents an excess of oil from [lowing from the crank case. The caps 36 are held in position by screws 36" and when it is desired to elevate one of the caps, washers '36" are disposed between the cap and the face of the crank "case.

memes the groove 40 in a manner well known in the art. When the shipper lever is in the position shown in Fig. l, the gear wheel 38 is brought into engagement with a driving gear wheel 44 which may be driven in any suitable manner from the. engine of an automobile,'and when the upper end of the shipper lever is moved to the right in Fig. 1 it' will shift the lever out of said engagement. F or the purpose of holding the shipper lever in either one of its adjusted positions the shipper lever is formed with a tooth or lug-'45, as illustrated in Fig. i. and attached to the thickened inner end of the arm 42 is a spring 46, the extremity of which is formed with two downwardly divergent corrugations 47 with which the lug or tooth 45 is adapted to respectively engageto hold the lever in its two adjusted positions. 01 course, I do not wish to be limited to shifting the gear wheel 38, as a clutch might be used for engaging the gear wheel 38 with the shaft 8 and the gear wheel be continuously rotated by the wheel 44. I, however, prefer to shift the gear wheel 38 entirely out of engagement with the gear wheel 44, thus eliminating friction and conserving the power otherwise necessary to drive the wheel 38. As shown clearly in Fig. l, the cylinder 10 is hel upon the crank case by means of screws 48 which pass downward through ears 49 formed upon the base of the cylinder and en ering upon the side walls of the crank case.

The advantages of my invention reside in the extreme simplicity of the pump, and the fact that there are few parts in its construc tion.

A further advantage resides in the forming of the crank case in one integral piece instead of a plurality of pieces. This tends to strengthen the crank case, renders it more durable renders it cheaper to make, and prevents the leakage of oil and dispenses with the necessity of packing the joints of the several sections with the'consequent disadvantages due thereto.

Another particularly important element of myinvention consists in the provision of the four fingers or guides 32 which serve to prevent the lateral motionof the depending portion of the piston. These fingers or guides prevent what is known as the slap of by keeping the motion entirely in a rectilinear direction, thus preventing the wear and weakening of the device from the side motion which would result without these guides. \V1thout these guides the wear re sulting from this pressure or slap will tend to produce leakage of the air with the cone sponding inefficiency of the pump.

It is also to be noted that the pump may be very readily assembled. With the cylinder removed, the eccentric will be pressed on to the shaft in the crank case and the piston then dropped over the eccentric and fastened in position by pin 28. Thus the device may be assembled'within a crank case composed of a single piece. It is obvious alsothat the parts of the pump may be readily disassembled. The cylinder is first disconnected from the crank case; the 'pin connecting the piston to the eccentric strap is then disconnected from the eccentric, the key 8 removed, the shaft drawn out endwise, and the eccentric strap removed fromthe crank case. The cylinder may be readily removed from the crank case and replaced in a position again without any danger-of losing the alinement of the piston with cmfresponding ill results. By removing the cylinder, the -valve may be readily removed for grinding Another important feature which may be here noted is that as the cylinder is in one piece andas the opening through the guide 14 is milled out at the same time that the valve seat is formed, there is always perfect alinement of the valve with the valve seat and no chance for disalii'iement with its resulting imperfect fitting of the valve on 1 the valve seat were the key for the stem 18 made in a separate piece fitted on to the cylinder.

While I have illustrated what I believe to be the preferable form of my invention, I wish it understood that many minor changes may be made without departing from the spirit of the invention as defined by the appended claims.

Having described my invention. what I claim is:

1. In a tire pump, a crank case, a cylinder detachably mounted upon the crank case, a shaft passing through. the crank case. a piston having laterally disposed parallel depending spaced members limgitudinally slotted to embrace the shaft, the slots opening at the lower ends of the members, where-- by said depending members may be dropped into position over the shaft when the cylin der is removed, and an actuating member mounted on the shaft and disposed between said spaced members and operatively connected with the piston.

:2. In a tire pump, a crank case, a cylinder detachably mounted upon the crank case, transverse shafts extending through the crank case. a piston having laterally disposed parallel depending spaced members, each member being longitudinally slotted to embrace the shaft, the slots opening at the lower ends of said members whereby to permit the members to be dropped into position over the shaft when the cylinder is removed, the side walls of the crank case haw ing inwardly projecting portions with which said members have sliding contact to 39 thereby guide the said members and prevent lateral movement of the piston, and an actuating member disposed on the shaft and between said depending members and operatively engaged with the piston.

3. In a tire pump, a crank casing having inwardly projecting annular oppositely disposed flanges, a shaft having bearing in said flanges, a piston operating in the cylinder and having oppositely disposed spaced parallel depending members, each slotted to snugly embrace the shaft, the outer faces of said members having sliding contact with the ends of the annular flanges, and an actuating member disposed on the shaft and between said depending members and operativelv engaged with the piston.

4. In a tire pump, a crank case having oppositely disposed inwardly projecting annular bearing flanges, a shaft mounted therein, a cylinder on the crank case, a pis ton operating therein, and four depending fingers spaced from each other, there being a pair of fingers on each side spaced from each other to snugly embrace the shaft, the outer faces of the oppositely disposed pairs of fingers having sliding engagement with the inner ends of the bearing flanges on the crank case, and an actuating member mounted upon the shaft and disposed between said menses fingers and operatively connected at its upper end to the piston.

5.In a tire pump, a crank case having oppositely disposed inwardly projecting annular bearing flanges, a cylinder mounted upon the crank case, a piston therein having oppositelvdisposed depending spaced members, each of said members being longitudinally slotted, a shaft passing through the bearings of the crank case and snugly disposed on said slots of the depending members, the outer faces of the depending members having sliding engagement with the ends of the annular bearing'fianges, an eccentric disposed upon the shaft and having its side faces slidingly engaging the inner faces of the depending members, a

ring carried upon the eccentric and like Wise having its side faces slidingly engag ing the inner faces of the depending members, said ring having an extension pivotally connected to the outer ends of the depending members.

In testimony whereof I hereunto aflix my signature in the presence of two Witnesses.

HARRY W. LOCKLEY.

Witnesses MARJORIE A. SMITH, ELsIn W, NIOKUM.

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