DE69616C - A double-acting hand pump for filling hollow wheel tires, game balls, rubber figures, etc. with air - Google Patents

Description

IMPERIAL

PATENT OFFICE

and so on with air.

The present invention relates to improvements in pocket or hand air pumps for inflating the pneumatic tires of bicycles, play balls, rubber figures and the like Objects, which aim to improve, that both in going and Cause of the piston or pistons sucking in air and thereby the outside an uninterrupted stream of pressurized air from the cylinder (or the Cylinders) instead of interrupted air flows.

In the accompanying drawing is a single cylinder air pump according to the present invention and like letters designate the same parts in both figures.

Fig. Ι is a view of the closed air pump, with the cylinder broken off is shown to make the piston rod visible.

Fig. 2 is a longitudinal section of the partially extended air pump.

The air pump consists of a metal tube C as a cylinder of appropriate length and diameter, with a piston of a peculiar construction, and a tubular piston rod R, which is provided at the end with a tubular handle H of such a diameter that it can be pushed over the cylinder C. can. The front end of the piston rod (or the handle to which the piston rod is attached) is provided with a nozzle N to which a rubber hose can easily be attached for the purpose of making the connection between the pump and the object to be inflated.

Both ends of the cylinder C are closed, namely the front end by the plug P and the rear end by an outer flap O C. This flap is provided with an air inlet opening / and a valve V ¹ - to prevent the air that has already been sucked in from escaping. Mistake.

The front plug P has a leather seal L, which is held in place by the hollow screw ^{plug P 2} and encircles the piston rod.

It allows the air to pass through the openings O into the cylinder C and at the same time prevents its escape from the same.

The cylinder C is divided into two compartments or spaces by the piston. This piston, which is attached to the end of the piston rod, consists of two leather cuffs HL and HL ² , which withstand the pressure and prevent the trapped air from passing through in any direction.

At the junction of the piston with the rod R, preferably on a metal piece M attached to it , two valves F ² and F ^{3 are} attached, which allow the air compressed by the piston to pass from space 2 through the piston into the tubular piston rod R and out same through the nozzle N in the to be inflated

Claims (1)

Allow object, at the same time the valve V ' ² closes. In the opposite movement of the piston, the air sucked in through the openings O into the space ι through the earlier piston stroke is compressed and pressed through the valve V ' ² into the piston rod R , from where it passes through the nozzle with the simultaneous closing of the valve F ³ N exits. During this movement, however, the air is also sucked in through the inlet opening I and the valve V ¹ into the space 2, which air comes back to the exhaust with the next piston stroke. Although the apparatus previously described can be used with preference, it is but possible to achieve the same or a similar result if the valves are arranged differently than shown and the air from the cylinder (through at its ends attached valves) into a lengthwise attached to the outside of the cylinder, with Nozzle provided tube is expelled. The cylinder can also be enclosed in a larger tube with a valve at each end of the cylinder for the passage of air and one at the larger outer tube Outlet nozzle "or a valve at the rear end and one through the piston to the front End going hollow piston rod is arranged. For some purposes the cylinder can also be enlarged and used as a piston the inside of the cylinder connecting tube can be used, its open end with the air outlet nozzle is in communication and both ends are provided with outlet valves are. The cylinder has an inlet valve at each end for air admission and the Piston has two piston rods connected by the handle. The valves can be set up in any way you like, even a piece of wax taffeta or something else elastic and airtight material, which stretches over the opening, can as such to serve. The present construction can also be used for air pumps with more than one cylinder be applied. Where strength or Space saving is not absolutely necessary, others can do the same Kinds of handles than the one shown can be used. Pat en τ claim: A double-acting hand pump for filling hollow wheel tires, play balls, rubber figures, etc. with air, consisting of a cylinder, the two bases of which are provided with air inlet valves (OL, IV ¹ J, and the hollow piston rod (R) to be connected to the air hose Pressure valves (V ² V ^s ) are connected to both sides of the piston, so that the air flow forced into the air hose becomes more continuous. For this purpose ι sheet of drawings.