US1140699A - Air-pump. - Google Patents

Description

1.1. MESSERLI.

`AIR PUMP,

APPLICATION FILED AUG.21| |913.

1 114:0 ,699 Patented May 25, 1915.

@9H/wwwa 7HE MORRIS PETERS cov. PHOTD-LITHU., WASHINGTON, DA c.

, UNITED STATE-s 4EEALTENTY, oEErcE.

JOHN J'. MESSERLI, 0F KINGSVILLE, TEXAS, ASSIGNOR OF ONE-HALF TO FREDERICK H. EICKHOFF, OF KINGSVILLE, TEXAS.

AIR-PUMP.

Y Specification of Letters IPatent. I' Patented May 25, 1915.

Application led August 21, 191.3. Serial No. 786,023.

To all whom t may concern f Be it known that I, JOHN J. MEssERLI, a citizen of the United States, residing at Kingsville, in the county of Nueces and State of Texas, have invented certain new and useful Improvements in Air-Pumps;

and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. 1 l

My invention relates to improvements in air pumpsvand especially that class adapted for the iniation of pneumatic tires or for other purposes.

An important object of my invention is to provide a pump of the above mentioned character which in operation is capable of compressing at each stroke of the piston or plunger a quantity of air or other fluid of a volume greater than that whichis ordinarily compressed at each stroke of pumps of the usual construction.

A further important object of my invention resides in the provision of a plunger or piston novelly arranged and constructed to provide the desired action.

A still further object of my invention is to provide a device of the above mentionedcharacter which is comparatively simple and inexpensive in its construction and therefore more commercially desirable than pumps `at present on the market.

The above and additionaly objects are accomplished by such means as are illustrated inthe accompanying drawings, described in the following specification and then more particularly pointed out in the claims which are appended hereto and form part of this application.

With reference to the drawings, wherein, I have illustrated the preferred embodiment of my invention as it is reduced to practice, and throughout the several views of which, similar reference numerals designate corresponding parts: Figure 1 is a vertical sectional view illustrating my device in assembled operative position, Fig. 2 is a sectional View taken online 2-2 of Fig. 1 illustrating the transverse pin extending through the lower portion of the pump cylinder and employed for pivotally mounting the foot rest, and Fig. 3 is a detail view of the foot rest.

Referring now to the drawing the numeral 1 designates the pump cylinder which is formed of any suitable length and diameter and is threaded at its lower terminaly porting the foot rest 5 which may be folded in an out of the way position as indicated by the dotted lines in Fig. 1. The pin 8 also extends lthrough the lower terminal Aof the pump cylinder 1 as will be clearly seen with reference to Fig. 2, whereby the cylinder is locked in engagement with the base cap 2. A flanged cap 6 is threaded upon the upper terminal of the pump cylinder 1 and is provided with an air admission port 7 formed therein and communicating with the interior of the pump cylinder 1. A piston or plunger designated 8 as an entirety is mounted within the pump cylinder 1 and is threaded upon the lower terminal of a piston rod 9 which extends upwardly through the flanged cap 6 andisprovided upon its upper terminal with a suitable handle 10 to be gripped by the operator for the purpose of operating the pump. f

An air outlet port 11 is formed through the base cap 2 and lower terminal of the pump casing 1 and is adapted to have connected therewith a suitable hose or ipe, not shown, to supply the air to the artic e to be inflated. y

The piston or plunger 8 in which my invention resides mainly, consists of a flanged tubular portion 12 threaded at its upper terminal to the lower terminal of the piston rod 9 which is provided with an air passage 13 communicating with the interior of the tubular portion 12 at its lower terminal and with the interior of the pump cylinder at its upper terminal through the opening 14: formed in the upper terminal of the tubular portion 12. An annular metallic washer plate 15 is mounted upon the tubular portion 12 and engages the under face of the flange 16 formed on the tubular portion. A cupshaped packing washer 17 is also mounted upon the tubular portion 12 and engages the adjacent face of the washer plate 15 and as a means for retaining the washer 17 in its cup-shaped position this invention employs a cup shaped ring 19 which is mounted upon the tubular portion 12, engages the washer 17 and is held in position by means of a nut 20 which is threaded upon the lower terminal of the tubular portion 12.

A plug 21 is threaded interiorly of the lower terminal of the tubular member 1 2 and disposed at'its upper terminal in spaced rela-tion to the lower terminal of the (piston rod 9 thereby affording a valve operating chamber 22. The plug 21 is provided long itildinallv with .the air passage andis groovedv transversely as at A2l at its upper terminal to provide for the escapement of the air to the lower part of the pump casing, when the ball valve is seated ,upon and closes thev air passage 23 asn will lbe clearly seen with reference to Fig. 1 inv which the ball 25 is illustrated in the position above described. The 'ball 25 is normally in engagement with the upper terminal of the air passage r23 and will seat upon the valve iseat 26 provided by the lower terminal ofthe air passage 13 in the piston rod 9 when the plunger is moved on its downward stroke, in ai'manner which will be hereinafter more fully described.

In operatiomassuming the plunger to Abe in a position as illustrated 'in F ig. y1, it is moved upwardly and air which will have entered the. pump Casing through the non*7 et 'the tcp thereof will passthrough ythe Vopening 111, vport 1-3, into the chamber -22 vabout the ballV 25 through the" groove 24C into ,passage 23 from thenceto the'pump cylinder. Upon the downward stroke of the plunger 4the air which is 'in the pump cylinder 1 below the piston or lunger 8 will be compressed, and the Vball 5 forced in enga,f ementu with the valve seat 26 whereby the"`ai.'r will be confined tothe lower portion` of the pump casing 1 as it is prevented escapement throughV the passage 13. When the piston or plunger 8 is moved downwardly the air will escape from the pump cylinder l through theeX- haust port 1 1. `It will thus be seen that I have provided a pump which is arranged and constructed to accomplish the functions hereinbefore described and will owing to itsv proportion and arrangement of parts mayy be resorted to, when required, without sacri- {icing any of -tlie'a'dvfantages of my inventionias defined in the appended claims.

Having thus described my invention, what is claimed is i i V 1, lIn an air pump,zthe combination with a pump cylinder, of a detachable cap forming a closure for the lower end of said cylinder, Ya pin rotatably journaled in said icap and having eyelets formed upon its ends, a

foot lrest slid'ably supported by Ysaid eyeletsfory movement transverselyv to or parallel with said cylinder. Y Y

2. lInanair pump, the combination with a pump cylinder, of a detachable cap forming a 'closure for thelwer end of said cylinder, a pin rotatably journaled vin said -cap and having eyelets formed upon its ends, a foot rest slidably supported by saidl eyelets .for movement transversely -;to or parallel with said cylinder,ksaid cylinder'being provided with transverse openings near the base thereof, saidv piny extending through said openingsfor locking lsaid cap against rotation upon said cylinders.

In testimony whereof l affxmy signature in presence of two witnesses. y I i .'IQHN Jf 14.113551313111- :Witnesses:

R, RBUoTToM, HOUSE.

Copies of this Ipatent may7 be obtained. .for vecents each, Ony yaddressin-g .the E VCennuissinne1'- y of rIafcents, i Washington, D..G.. f 1

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