US2096247A - Hand-oiler - Google Patents

Description

J. M. HOLDEN Oct. 19, 1937.

HAND 011m Filed Nov. 30, 19:56

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INVENTOR 81a. 78! a I w m WITN ESSES Patented Oct. 19, 1937 UNITED STATES 'i. OFFICE OILEB This invention relates to improvements in a hand oiler of the type having a reservoir with a thumb-operated, flem'ble, spring bottom; and the objects of my invention are, first, to provide a 5 pump to be contained entirely within the reservoir of the oiler and operable by thumb pressure and the consequent inward flexing of the spring bottom; second, to provide a pressure pump oiler which will dispense oil with the spout directed in m practically all positions, especially with the spout pointing above the horizontal, whereby oiling of difiicult or impossible points may be easily accomplished; third, to provide a pump mechanism readily adaptable to be fitted to various sizes of fourth, to provide means for venting air into the oll reservoir as oil may be pumped out, the venting'means also serving to prevent the forcing out of the'spout of oil by reason of the expansion of the air within the reservoir due toa rise in the ambient temperature.

I attain these objects by means of the mechanism illustrated in the accompanying drawing, in which Fig. 1 is a sectional elevation of an oiler with a pump mechanism fitted therein; Fig. 2 is a broken-away view ofan oiler held with the spout directed on a line below the horizontal and with the visible portion of the pump mechanism in elevation; and Fig. 3 is a sectional view of an oiler spout, broken awayv at a point above its connection with its reservoir and intended to illustrate an optional method of conducting the oil discharge to the nozzle and of venting air to the reservoir.

ence, l0 designates a can body which constitutes a reservoir for oil or other liquid contents and it designates the flexible spring bottom of the body. Said body is provided at its upper part with a mouth l2, of substantially, cylindrical shape, threaded internally, and with an outwardly flanged portion l2- at its upper extremity. Said mouth may be a separate part, spun onto or otherwise attached to the body, or it may be integral therewith and spun/or formed to the shape substantially as shown? A closure i3 is in the form of a hollow cylindrical piece, externally threaded at its lower end to screw into the internally threaded can mouth I 2, and is provided with an outwardly flangedportion 83' formed at its upper end, which flange is knurled on its periphery to,

provide a non-slip grip for the fingers. The flange i3 of the closure l3, co-operates with the flange l2, of the can mouth l2, to receive be- F tween their opposed faces a substantially circureservoirsand to different lengths of spouts;-

Referring to the drawing by numbers of referterial for sealing the closure against leakage.

- The hollow part of the closure l3 isprovided with an inwardly projecting, apertured flange i3" formed at its upper end and adapted toreceive a spout i 5. Said spout is of a conventional, tapering cylindrical form, being of smaller diameter at its discharge nozzle than at its pointof attachment to the closure, and has a flange IS, formed at its larger end, designed to be held" against the flange i3" of the closure l3. Said closure is also threaded internally from its lower end to receive an externally threaded pump body it which, when screwed into place, bears with its upper face against the spout flange it" to hold the spout it firmly in place. A gasket may be placed between flanges l6 and 93" to insure tightness at this joint. 7

The pump body it incorporates a pump'cylinder i9 comprising a length of cylindricaltubing pressed forcibly into an annular groove formed in the lower part of said body which receives, within its open lower end, a telescopically associated, closely fitting piston 20, of hollow cylindricalsection having a closed lower end. A helical compression spring 2i, contained within the hollow piston and cylinder and having its opposite ends bearing against the pump body and the closed end of the piston, respectively, serves to force the piston downward to bear against the can bottom ii. Said spring is formed with a few turns at both ends of the'spring of larger diameter than the body portion thereof and thereby adhering to the walls of said piston and cylinder by friction therewith; and the length of said spring is made' such that, when the closure and pump assembly is removed from the reservoir and the spring .may

fully extend, said spring will not extend suficiently to force said piston out ofthe bore of said cylinder but will retain the piston therein by frictional grip upon the co-operatingparts.

A dischargepassageway 22, concentrically located within the'pump'body I8, leads upward "u from the interior of the cylinderl'il'to an enlarged continuation 22' thereof, where said'enlargement forms a chamber for the'retentionof a checka ball 23, which seats against a shoulder 22" formed by said enlargement. A straight cylindrical tube 26 provides a continuation of the discharge passage 22, being pressed into the enlargement 22' thereof, and has an internal diameter less than the diameter of said check-ball and restricts the ball to a limited travel within the chamber. Notches 2d are cut transversely at the lower end 0i tube 26 to provide passage for liquid into said tube when the ball is carried upward against the end of the tube by liquid discharged from the cylinder I9.

The tube 24 is, furthermore, of such diameter and length its upper end will fit closely within the interior of spout l6 at a point near the end of the straight portion of said spout when the pump body I8 and closure I3 are assembled. A small vent hole 25 is drilled through the wall of tube 24 near its discharge end and a small vent passage 30, through the body I8, provides communication from the annular space between tube 24 and spout l6 into the reservoir of the oiler.. Air may thereby find passage into or out of the reservoir through the previously mentioned passage 30, the annular space between tube 24 and spout I6, the vent hole 25 and the nozzle of spout iii.

A chamber 26 drilled into the pump body l8 pointed in the same direction as the suction tube v 21 so that, when the oiler is held with the spout inclined below the horizontal and the nozzle pointed downward, the suction end of tube 21 will be immersed in the liquid contained within the reservoir, as illustrated in Fig. 2.

Either or both of the check- balls 23 and 28 may be provided with springs for positively seating the balls on their respective seats, but I prefer to depend on the reversal of liquid flow, when the pump is operated, to carry the balls to their seats.

The operation in dispensing oil is as follows. The reservoir containing suiiicient liquid to im merse the suction entrance of tube 21, upon inward flexing of the can bottom i l by pressure of the thumb or fingers, the piston 20, being in contact with the inner side of the can bottom, is carried upward therewith and compresses spring 2| and, the suction check-ball 29 seating and preventing the return of liquid through the suction tube, liquid is forced out of the cylinder by way of passage 22, around thedischarge check-ball 23,

through discharge tube 24 and through nozzle of spout l6. Upon release of pressure on the can bottom,;its resilience and the force of spring 2|, acting through the piston 20, causes it to return to the original convex form illustrated in Fig. 1. The downward stroke of the piston 20 causes an initial return flow of liquid from the spout which carries the discharge check-ball to its seat 22",

the suction check-ball 28 is lifted and liquid flows by way of suction tube 21, chamber 26 and passageways'29 and 22 to refill the cylinder l9.

It may be seen that the end of the suction tube 21 will be immersed in the liquid of the reservoir, when the oiler is held. in the hand and operated for dispensing, with the spout in practically all positions from vertically upward to nearly vertically downward and that, even in the vertically downward position, advantage is had of the capacity of the cylinder which may be emptied by dispensing operation.

In order to dispense liquid from the oiler it is necessary to provide means for the entrance of air to replace the volume of liquid dis zensed. Be-

lustrated in Fig. 1.

fore air can enter the reservoir through the vent passages provided in my invention, and previously described, any liquid standing in the space be-;

tween the nozzle of spout l6 and the vent hole 25 of tube 24 must first be drawn back into the reservoir by way of the vent holes 25 and 30; and this comprises a valuable feature of my invention.

By this feature of draining the spout nozzle, dribbling of liquid from the nozzle after using the oiler is prevented and breathing action from expansion of air in the reservoir cannot force liquid from the reservoir out of the spout.

In this connection, reference may be had to Fig. 3 which illustrates another method of conducting liquid from the pump to the spout nozzle and of venting to the reservoir. This figure, representing an oiler spout broken away above its point of attachment to a reservoir, is assumed to have similar pump dispensing mechanism as il- 24a is extended to project slightly beyond the nozzle IGb, of spout I60, and is a loose fit at the point of least diameter of said nozzle, providing an annular space for passage of air at said point designated 3|. Air venting to or from the reservoir would follow a similar course as in the arrangement shown in Fig. 1, namely, through the annulus 3|, the space between tube 24a and spout lid and the vent passage 30.

The mechanism is readily adaptable to different sizes of reservoirs by altering the lengths of In Fig. 3 the discharge tube cylinder l9, the piston 20 and spring 2i; and to different lengths of spouts by altering the length of tube 24.

{It is understood that the construction of the invention is not to be limited to the actual detail shown and that it may be modified within the scope of the claims following without departing from the spirit and scope of the invention.

Having thus described and illustrated my invention, what I claim and desire to secure by Let'- ters Patent is:

1. In a hand oiler having a body, a flexible spring bottom, a reduced mouth for said body, a closure for said mouth and a spout attached thereto; a pump mechanism attached to said closure, operable by inward flexure of said bottom and comprising a body containing a suction and a discharge valve, a suction tube from said .body extending to the lower part of the reservoir of said oiler body, a cylinder and slidable piston and means for forcing said piston outward against said flexible bottom.

2. In a hand oiler having a body, a flexible spring bottom and a mouth and closure therefor, said closure incorporating a spout and a pump mechanism integral therewith; a discharge tube for said pump mechanism extending upward 'within'said spout to a point near the nozzle thereof.

3. In a hand oiler, having a bodyya flexible spring bottom and a mouth and closure therefor,

said closure incorporating a spout and a pump mechanism integral therewith and a discharge tube for said pump mechanism extending upward within said spout to or beyond the nozzle thereof and means for venting air to the reservoir of said body, comprising an air passage'between said tube and said spout at said nozzle and supplementary passageways into said reservoir.

5. In a hand oiler having a body, a flexible spring bottom, a reduced mouth for said body, a

closure for said mouth and a spout attached thereto; a pump mechanism attached to said closure, operable by inward flexure of said bottom spectively.

and comprising a body incorporating a suction and a. discharge valve and a cylinder integral therewith accommodating a hollow piston with a closed outer end; a spring contained within said piston and cylinder, the end turns of said spring being formed or greater diameter than the central portion thereof and forcibly gripping the interior walls'of said piston and cylinder re-

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