US 1747873 A
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Feb. 18, l93 0. A JJMASTRONE VENT PLUG Filed July 1, 1927 Patented Feb. 18, 1930 PA'rN'r FFICE' JOSEPH MASTBONE, OF SOUTHINGTON, CONNECTICUT VENT rLU'o App1icationfiled July 1,
This invention relates to a vent for barrels or containers for liquids, and its chief object is to provide a simple and easily manipulated sealing device for normally sealing the barrel or container to prevent entrance of air and which may be easily opened either to relieve pressure within the container or to admit air to permit drawing off of the liquid through a spigot or drawoff cock at the lower part of the barrel or container.
With the foregoing and other objects in view, I have devised the construction illustrated in the accompanying drawing forming a part of this specification. In this drawing,
Fig. 1 is a vertical section through a section of the wall of a barrel or container and a bung closing an opening therein, with my improved sealing device in position and shown in side elevation, the seal being closed.
Fig. 2 is a transverse section substantially on line 22 of Fig. 1.
Fig. 3 is a vertical section through the device in closed or sealing position, and
Fig. 4 is a similar view in the open position.
The wooden wall of the barrel is indicated at 5, and my improved sealing device is mounted in a hung 6 in an opening in this Wall, although if preferred the device may be mounted directly. in the wall of the barrel or 30 container. This vent device comprises a metal body 7 threaded on its outer wall at 8,
preferably with a left hand thread, and it is also preferred that this wall be tapered somewhat so that as it is threaded into the wall 5 or bung it will have a tight fit therewith. The upper portion of this body is preferably noncircular, for example, hexagonal as indicated at 9, so that it may be manipulated by a suitable wrench. This body has a longitudinal passage 10 extending therethrough which is threaded for a portion of its length as indicated at 11, this passage being preferably somewhat enlarged above these threads as indicated at 12.
Cooperating with this body is a plugmember 13. This member has a body portion 1 1- threaded to fit the internal threads 11 of the body, and at its outer end this plug has a knurled or other suitably shaped head. 15 The head 15 and the body 14 are connected 1927.. Serial No. 202,914.
at 12, between the outer wall of this neck and the inner wall of the body. Mounted on the under side of the head is a packing 17 such as a fibre, rubber, or other suitable washer, and this packing is arranged to seat on and be clamped against the end 18 of the body member, which forms a seat for this packing. The plug member is also provided with a vent passage 19 leading from the inner end of this plugand passing through a side wall thereof below the packing 17, preferably somewhere between this packing and the threaded body portion 18, and therefore, it leads into the space formed by the enlargement 12. It is preferred to pern'ianently mount a pin 20 in the side wall of the body 7 to project intovthe enlargement 12 and form a stop in the path of movement of the shoulder 21, sothat after once being assembled the plug cannot be removed from the body member in normal operation.
In operation the barrel or container can be easily and quickly sealed by merely turning the head 15 to screw the plug member inwardly and clamp the packing 17 against the seat 18 at the outer end of the body member, 3
as shown in Figs. 1 and 3. If it is desired torelieve pressure within the container or to admit air to permit drawing oif of liquid from the container through a spigot or drawoff cock from the lower part of the container, all that is necessary is to rotate this head in the opposite direction thus moving the plug member outwardly to the position shown in Fig. 1. As the packing 17 is secured to the plugmember it is moved away from the end "18 ofthe body, thus providing a communication from the enlargement 12 to the outer atmosphere and permitting either relief of pressure through the vent passage 19, or when drawing liquid to permit air toenter through this passage. If thethreads are left hand threads, the act of unscrewing the plug member will have no tendency to loosen the body member in the wall of'the container.
It is especially to be noted that this device lea is extremely simple in construction, in effect being composed of only two metal elements, the body 7 and the plug member 13. It will also be noted the machining operations required are reduced to a minimum, these being the threads on the body member and the plug member. It is, however, preferred to finish the end 18 of the body member forming a seat for the packing to give a better fit although this is not necessary as a tight fit can be secured with an unfinished surface, especially if it is fairly smooth. Therefore, this device can be manufactured at a very low cost, and as the seat 18 is at the outer end of the body any finishing operation on it would be a very simple one, and furthermore, this construction locates this seat and the packing associated therewith outside the plug and container where they are readily accessible for inspection at all times without disconnecting or disassembling any elements.
Having thus set forth the nature of my invention, What I claim is:
1. A vent plug including a one piece body threaded for connection to a barrel wall or bung and having a longitudinal passage therethrough threaded for a portion of its length, a plug having head and body portions connected by a reduced neck, the body portion being of a larger diameter than said neck and threaded to fit the internal threads of the said body and the head being outside the body and overhanging the outer end thereof, said reduced neck providing a clearance space under the head between the plug and the body opening through theouter end of the body, and a packing mounted on the under side of the head to engage the outer end of the body, said plug having a vent passage leading from its inner end and through theside of the neck between the head and body portions.
2. A vent plug including a body threaded for connection to a barrel wall or bung and having a longitudinal opening therethrough threaded for a portion of its length, a plug having head and body portions connected by a reduced neck forming a shoulder on the adjacent end of the body portion, the body porti on being threaded to fit the internal threads of the said body and the head being outside the body, a packing mounted on the under side of the head and adapted to be clamped by the head against the outer end of the body to seal the passage through the body, a stop extending inwardly from the inner wall of said passage outwardly of the shoulder and forming a stop to cooperate with this shouler to limit outward movement of the plug,
and said plug being provided with a vent passage leading from its inner end' through "the side Wall of the neck.
-' In testimony whereof I aflix my signature.