US1074051A - Air-pump. - Google Patents

Description

entran srarns rarnnrorumn rnrrz n. "HOIIENSTIEN AND CHARLES e. Mesures, or RICHMOND, INDIANA.kv

T 0 'al l whom i may concern Be it knownthat, we, FRITZ K. HoHnN- the county of l-Vayne and State ot' Indiana,

I have invented certain new and useful Improvision of an air pump which may be quickly and easily *attached to or detached from the cylinder of an engine.

c A still further Vobject of this invention is the provision of an 'air pump comprising a cylinder having a piston mounted tor reciprocation therein, the cylinder being adapted for connection with the spark plug opening ot the engine cylinder, the movement of the pist-on of thel pumpbein'g dependent upon vthe recigrocation of the piston of the engine.

`With these and other objects in view, our invention resides in the novel construction and arrangement offparts to be hereinafter more fully described, claimed and illustrated in the accompanying drawing, in which, I 1rFigurel 1 is a longitudinal section of the i pump showing it applied to the cylinder of an enfrine. Fie: 2 1s a tra mentar section l; of the piston connection. .'Fig. 3 is a section taken on the line 3-8 of Fig. 4. Fig. 4 is l.a fragmentary .elevat-ion of the piston connection.

Referring moreparticularly to the drawing, the numeral*1designates the cylinder otua motorcycle engine, the cylinder being ot any. desired construction inl which is mounted a lpiston 2, Athe cylinder having the usual spark plug opening 3, 1n which Is insert-ed one end oit'V an elbow 4. The air pump,

'comprises a cylinder-'5 which is formed at one end with a neck '6, the neck being adaptjed to enter the opposite end of the elbow 4,

vand being formedy with an opening 7 in one side tor the reception of a spark plug which either end of it-s stroke.

Speccation of Letters Patent. Patented Sept, 1913,y 'y applicati@ mea Deeember 11, 1912. serial No. 736,187.

may he of any suitable construction. The opposite end-0f the cylinder 5 is exteriorly threaded as at 9 for the rece tion of an interiorly threaded flange 10 o one end. of

another cylinder 11. A piston 12 is Amount-v ed for reciprocation in the cylinder 5 and.

suitable piston rings 13 are mounted on the periphery of the piston to form a tight joint between the cylinder` and the piston. A similar piston 14, having piston rings 15, is

mounted for reciprocation in the cylinder 1l and connect-ing the pistons 12 and 14 is a suitable piston rod 16. Suitable buler springs 17 are mounted upon the head 18'of the cylinder 5 and the head 19 of the cylinder 11 to form cushions for the .piston 12'at The outer end of the cylinder 11 is exteriorly threaded as at 20 for the recept-ion of the threads 21 of the cylinder cap 22, which is provided with suitable openings 23 for the ingress and outlet of air. Suitable openings 24 and 25 respectively are formed in the outer head of the cylinder 11, and an inwardly opening check valve l26 is disposed lin the opening 24A andpsecured in thev outlet opening 25 is one end oflan air hose 27 in which is mounted a ball valve 28 which is'adapted to normally close the opening 25.

. It will be understood that our invention is adapted to be secured in the spark plug opening of an engine of the four cycletype and upon the downward or aspirating stroke of the enginepiston 2, the pistons 12 and 14 will be drawn toward the inner ends of the cylinders 5 and 11 respectively by reason ofl the suction in the cylinders caused by theinovement of'the piston 2, and air will be drawn into the cylinder 11 through the inlet opening 24 of the cylinder. Upon the upper or compression stroke of thev piston of 'the engine, the pistons 12 and 14 are moved outwardly whereupon the supply of air in the piston 1 1 is forced out through the outlet opening 25 into the air hose 27 and thence into the tire (not shown). Upon the secondi downward or explosive stroke of the piston 2, the piston 12 acts as a reactionary me1nber, and remains stationary against the inner head 19 of the cylinder 11, while the pistony v2 is moved downwardly byreason of the torceA ofthe explosion. Upon the fourth cycle of the engine, the piston 2 is moved upwardly 'whereupon the burned gases arev forced out of the Cylinder, and then the operation'of the. pump is repeated.

.It is apparent that upon the fourth cycle for exhaust stroke of the piston 2, a portion of the burned gases` will be forced into the cylinder of the pump, and to allow the burned gases to escape from the cylinder through the outlet ports 29 in the head 19 v of the cylinder 11, we have provided a ilexible connection between the lpistons 12 and cured to the piston 111, extends tor a short distance vinto the outer end of the hollow piston rod A spiral contractile spring 31 is connected at one end to the outer end of -the piston and i opposite end to a cross bar in the piston rod 1G. The longitudinal slots 33 are formed in the hollow piston rod near the. outer end thereof, and extending from the piston 14 in a sleeve 34 which encircles the hollow piston rod 16 so as to close the slots therein. A pin 35 is .secured in the .piston rod 30 and the opposite ends 4thereof7 extend through the slots 33 and are l secured in the opposite sides of the sleeve 34 to limit the sliding movement of the piston 1e with relation to the piston rod 16, It

4will be seen that upon the exhaust stroke of the piston 2, the burned gases which enter the cylinder 5 will be forced into the hollow pistonrod 1 6 against the inner face of the piston 14, and will tend to move the piston 14 away from the outer end ot the hollow piston rod 16 against the action of the spring 31. It will be seen that upon. the outward movement of the piston 14, the sleeve 34; vwill be moved outwardly on the piston rodl 16 and uncover the slots 33 through which the gaseswill flow and escape through the exhaust ports 29. When the piston 2 has '-impleted its upward stroke and the gases nave been exhausted from the cylinder) 11,

' the action. of the spring 31will tend to draw the piston 14 against the upper edge of the hollow piston rod 16, and the sleeve 34 will close the openings 33 in the rod 16 and the pump is then ready for another operation;

In View of the above description, taken in connection with the accompanying drawing, it willA be seen that we have provided an air pump which is adapted for use with the cylinder fof. an explosive engine and which requires ay minimum number'of parts, which may be cheaply constructed and which will fuliil v'all the requirements of such a device.

WhileV--the'construction illustrated in the in the details of construction without departing from the spirit of the-invention or sacrlcmg any of its advantages, as determined by the scope of the appended claims.

Having thus fully described our invention, what we claim and desire to secure by Letters Patent is: Y f

1. A pump comprising a cylinder, inlet and outlet ports formed in said cylinder, spaced pistons mounted for .reciprocation in said cylinder', one of said pistons having an opening therein, a hollow piston rod mountedl within said opening at one end and extending to the other of said pistons, said hollow piston rod being formed with longitudinal slots near its free end, a sleeve connected" to said other piston and' adapted to encircle the free end of said hollow piston iod and extendl over the slots therein, and flexible means connecting said other piston with said hollow piston rod to normally maintain said sleeve over said slots, as and for the purpose described.

2. A pump comprising a cylinder, inlet and outlet ports formed in said cylinder, spaced pistons mounted for reciprocation in said cylinder, one ot' said pistons having an opening therein, a hollow piston rod mounted within said opening at one end extending to the other of said pistons, said hollow piston rod beingformed with longitudinal slots near its freeend, a sleeve connected to said other piston and adapted to encircle the free end of said hollow piston rod and extend over the slots therein, a pin mounted. in

the walls of said sleeve and projectingV throughsaid slots to limit the separation of said pistons, and a spring connected to said other piston and to the hollow piston rod to normally maintain said sleeve over the slots in said hollow pist-on rod, as and for the purpose described.4

3. A pump comprising a cylinder, inlet and outlet ports4 formed in said cylinder, spaced pistons mounted for reciprocaticn in said cylinder, one of saidpistons having an opening therein, a hollov.7 piston rod mounted in said opening at one end and extending to the other of said pistons, a solid piston rod connected to said other piston and extending within said hollov,T piston rod, and

a spring connected to said piston rods for holding said other-'piston in engagement i ediwiqthin said-,SEM .one end, nd .exf .:itendm to' thegot er ofjfsaid ton ro.` connected .withsaid ot er'piston and -sleeve connected nwith said other piston and .idapted to encircletheofree end of said holow' 104:,

vagainst the free end of the hollow piston rod,

os and'for. the pur ose described.

In testimony w ereof we hereunto affix 'our signatures in the presence of two wit- 15 nesses.

disposed within thefre'e end -ofsaid hollow pisbon'rod, the free end of the hollow iston.

IOdibBlg'fOlmed longitudinal S OS, 8. FRITZ K. HOIENSTIEN CHARLES G. MEYERS.

l' Witnesses:

RALPH H. HUssnN, Jnms Buur.

piston rodfand extend over the slots therein and njieans for connectinsad. pistonrods to normally hold sald ot er p1ston Uoplol of this potent my 'be obtained for nu uente nach, by addressing the Commissioner of Intenta,

l Wuhhlltol, n.0."

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