US1436175A - Air pump - Google Patents

Description

F. A. JOHNSON.

AlR PUMP. APPLICATION FILED MAY 3,,1'921.

1,436; l 75. Patented Nov. 21, 1922.

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Patented Nov. 21, 1922.

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FRANK A. JOHNSON, or AURORA, ILLINOIS.

AIR PUMP.

Application filed May 3, 1921.

To all whom it may concern.

Be it known that I, FRANK A. JoHNsoN, citizen of the United States, residing at Aurora, in the county of Kane and State of Illinois, have invented certain new and useful Improvements in an Air Pump, of which the following is a specification.

This invention relates to an air pump and has for its principal object to provide a device of this nature which will be of extremely simple, durable and inexpensive construction, one which is efficient and reliable in operation, and well adapted to the purpose for which it is designed.

With the above and numerous other objects in view, the invention resides in certain novel features of construction, and the combination and arrangement of parts as will be hereinafter fully described and claimed.

In the drawing Figure 1 is a side elevational view of the pump showing portions thereof in section, and

Figure 2 is an end elevation thereof.

Referring to the drawing in detail it will be seen that 1 designates the foot plate which is provided at one end with the spaced parallel lips 2 which are provided with registering apertures for receiving the bolt and 3 for pivotally supporting the standard 4. A pair of plates 5 are suitably fixed to the standard 4: adjacent its lower end for pivotally receiving the links 6 one of which supports the cylinder 7 while the other supports the cylinder 8. The cylinder 8 1s adapted to be of a smaller diameter than the cylinder 7 A clamp 9 comprising the sleeve 10 and the two spaced apart parallel flanges 11 is pivotally connected to top terminal of the standard 4:. The handles 12 and 13 are in the sleeve 10 while the piston rods 14 are pivotally mounted between the flanges 11 adjacent their ends. These piston rods 14 extend through the closures 15 of the cylinders 7 and 8 and are provided with pistons which are adapted to slide in these cylinders.

Each piston consists of the disk 16 and washer 17 between which is supported the flexible member 18. The disk 16 is of smaller diameter than the corresponding cyl- Serial N0. 466,471.

inder and the washer 17 is smaller than the disk 16 whereas the flexible member 18 has a diameter larger than that of its corresponding cylinder so that it will assume a saucer shape as indicated in the drawings. An aperture 19 is provided in the closure 15 of cylinder 17. A hose 20 connects the bottom of cylinder 7 with the bottom of cylinder 8 and a check valve 21 is situated therein so as to allow the air to pass in the direction shown by the arrows but not in the opposite direction. Another hose 22 is in communication with the cylinder 8 through its bottom-and is provided with the check valve 23 so as to allow the air to pass in the direction indicated by the arrows but not in the opposite direction.

From the above detailed description it will be seen that by pushing downwardly upon handle 12 the air in cylinder 7 will beforced through the hose 20 into the smaller cylinder 8 and therefore compress. The handle 13 Will now be forced downwardly and the air will be forced through the hose 22 into the tire or other desired receptacle. It will also be noted that the piston in cylinder 7 will act as a check valve since as handle 13 is pressed downwardly this piston will move upwardly and the air will be allowed to pass between the flexible member 18 and the side Walls of the cylinder 7.

Having thus described my invention what I claim as new is 1. In combination, a base plate, a standard pivotally mounted thereon, a handle pivotally mounted on the top of the standard, a pair of plates fixedly attached to the intermediate portion of the standard, links pivotally carried by the plates, cylinders mounted on the links, pistons in the cylinders, rods connecting the pistons with the handle, one

of said cylinders being larger than the other, a hose for communicating the cylinders with each other, and an outlet hose for the smaller cylinder.

2. In combination, a base plate, a standard pivotally supported on the base plate, a handle, a sleeve on the handle provided with parallel spaced lips, means for pivoting the standard between the lips, a pair of cylin ders pivotally supported to the standard intermediate its ends, pistons in the cylinders,

rods connected to the pistons at one end, In testimony whereof I aflix my signature means for pivoting the other ends of the rods in presence of tWo Witnesses. to the lips oi: the sleeve on the handle, a hose FRANK A- JOHNSON.

for connecting the two cylinders, a check valve in said hose, and a delivery hose from Witnesses:

one of the cylinders in the manner and for I. S. THoMPsoN, the purpose specified. JULIUS F. MILLER.

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