US1161728A - Safety-cap for inflation-valves of pneumatic tires. - Google Patents

Description

E. A. RASBRIDGE. SAFETY CAP F OR INFLATIONV'RLVES 0F PNEUMATIC TIRES.

APPLICATION FILED MAY I0. I915.

Patented NOV. 23, 1915.

EDWARD A. RASBRIDGE, 0F SGRA NTON, PENNSYLVANIA.

SAFETY-CAP FOR INFLATION-VALVES OF PNEUMATIC TIRES.

Application filed May 10, 1915. Serial No. 27,103.

To all whom it may concern.

Be it known that I, EDWARD A. RAsBRrnGE, a citizen of the United States, residing at Scranton, in the county of Lackawanna and State of Pennsylvania, have invented certain new and useful Improvements in Safety- Caps for Inflation- Valves of Pneumatic- Tires; and I hereby-declare that the following is a full, clear, and exact description thereof, reference being had to' the accompanying drawings, which form part of this specification.

This invention relates to inflation valve for pneumatic tires, and more particularly to safety devices for closing the bore of the valve-stem or nozzle through which-the pneumatic tube is inflated or deflated, so as to prevent the escape of air in case of leakage through the'usual check-valve controlling the air vent.

The primary object of the invention is to provide simple, efficient and inexpensive means for effecting a perfect closure of the air vent to prevent the escape of air, together with means for unseating the check-valve to permit the air to escape for the purpose of deflating the pneumatic tube, and which means are not liable to become lost or mislaid in deflating. the tube.

,The invention will first be hereinafter more particularlv described, with reference to the accompanying drawings, which are to be taken as a part of this specification, and then pointed out in the claims at the end of the description.

In said drawings, Figure 1 is a vertical sectional elevation of a device embodying my invention, showing the reversible cap attached to effect a closure of the air vent;

--Fig. 2 is a slmilar view showing the cap in side elevation and in reversed position from that shown in Fig. 1 for the purpose of holding the check-valve open for deflating the inner tube; Fig. 3 is a perspective view of the reversible cap; Fig.- 4 is a bottom plan view of the same; and Fig. 5 is a vertical sectional view of the device used within the socket of the reversible cap for closing the letter A may denote the valve body orstem of an ordinary inflation valve for pneumatic.

tires having an externally threaded end protruding through the rim of the Wheel; sald Specification of Letters Patent.

Patented Nov.'23, 1915.

cap B. The cap B has at one end an inte-' riorly threaded socket adapting it to be screwed upon the externally threaded port1on a of the valvebody or stem A, for the purpose. of closing the air vent or bore of said body in which there is a valve stem C carrying at its inner end an ordinary inwardly opening valve (not shown) controlling the admission and escape of air through said bore,for the purpose of inflating or deflating the pneumatic or inflatable tube to which the valve is attached in the ordinarv manner.v Within thesocket end of the cap B there is preferably a conical extension of the socket in reduced size adapted to recelve acorrespondingly shaped projection 03 on a valve member D which'is seated on an annular shoulder at the base of said socket;

seated-against a correspondingly shaped-or latter is screwed. into the socket of the cap,

' beveled-end of the valve stem A when the whereby the air vent through the valve-body or stem A is effectually closed and made perfectly air-tight to prevent the. escape'of air in-case of leakage through the u ual check valve within the stem or' inflatable tube. The other end of the reversible cap B is .formed with a projection (2 which is flattened on one or both sides thereof, as at d, to provide an'air vent between the flattened side or sides and the-adjacent wallpfthe tubular stem into which it is screwed; said projection 1Z being threaded, on opposite sides thereof, as at d, to adapt it to-be screwed into the interiorly' threaded end of the valve body 'or stem' A, for the purpose of engaging the end of the valve stem C and unseating the valve within the valve-body orinflatable tube.

I thus provide a very simple, eflicient and inexpensive device which. will prevent the escape of air from an inflatable tube in the event of leakage through the usual check- 1055- valve, and at 'the same time a simple and eflicient means for unseating and opening the check-valve for the purpose of deflatingthe pneumatic tube by simply reversing the cap, such device being also adapted to enable the autoist to relieve the pressure within ,the inflated tube when desired by simply reversin the reverse position very effectual means are provided for closing and sealing the air vent so as to prevent the escape of air should a the usual check-valve fail to perform its usual functions.

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

1. In an inflation valve I for pneumatic tires, the combination with a valve body having a longitudinal bore and threaded 'exteriorly at one end; of a safety cap having an interiorly threaded socket adapted to engage the threaded end of the valve body, a valve-member fitted in the lower end ofsaid socket, and an annular soft metal gasket surrounding the upper end of said valvemember and adapted to be engaged by the end of the valve body and effect an air-tight an' interiorly threaded socket provided .with. ,a reduced tapered extension in its bottom, a

valve-member having a tapered shank engaging said tapered extension, and a soft metal gasket surrounding the upper end of said valve-member and adapted to efi'ect an.

air-tight closure of the bore through the end of the valve body When the cap is screwed thereon.

In testimony that I claim the foregoing as my own, Iafiix my signature in presence of two witnesses.

EDWARD, A. RASBRIDGE. Witnesses: I S. H. SAPous,

GEORGE RAsBRmon.

Images