US2747770A - Pressure applicator - Google Patents

Description

H- PEREIRA PRESSURE APPLICATOR Filed April 8, 1953 INVENTOR.

By Human? 7'0 PEPE/i719.

HTTORNEK May 29, 1956 illlllll llllliz United States. Patent PRESSURE APPLICATOR Humberto Pereira, Essex, Conn., assignor, by mesne asslgnments, to Frank E. Wolcott, West Hartford, Conn.

Application April 8, 1953, Serial No. 347,510 3 Claims. 01. ZZZ-80.5)

This invention relates to a pressure applicator and more particularly to a device for applying pressure to containers, such as cans and the like, for causing the material contained therein to be forced therefrom through a suitable dispensing nozzle or the like.

It is an object of this invention to provide such a device whereby a suitable pressure bulb may be readily connected to a conventional material container so as to pressurize the container and thereby cause the material in the container to be forced out.

A still further object of my present invention is the provision of such a device which is easy to operate, leakproof, highly durable and adapted for use with a conventional type of pressure bulb containing such commonly known mediums as CO2, nitrous oxide, or Freon for supplying pressure.

Further objects and advantages of this invention will he more clearly understood from the following description and the accompanying drawings in which:

Fig. 1 is a plan view of a pressure applicator unit embodying my invention.

Fig. 2 is a similar view of the pressure head used in such unit.

Fig. 3 is a sectional side view of said unit with some of the parts being shown in elevation.

Fig. 4 is a side view of the pressure head.

Fig. 5 is an enlarged fragmentary sectional side View of a portion of said head, showing one of the pressure bulbs in use therein.

As shown in the drawings, my improved pressure applicator includes a cup-shaped base 5 having a threaded portion 6 to which is threaded a cover 7.

A pressure head 8 is contained within the cover 7 and adapted to engage with the annular free edge portion of the cup 5.

The cover 7 has mounted therein a suitable valve 9, of the type such as described in the U. S. Patent No. 2,513,272, of July 4, 1950, which is preferably secured to an annular flange 10 surrounding an axial opening 11 in the cover 7. The said valve extends downwardly through the cover and into an axial recess 12, in the pressure head 8, which communicates with a pressure tube 13 that projects downwardly from said head. A suitable sealing washer 14 is provided between the shank of the valve and the wall of the recess 12 to form a gas- :tight seal at that point.

The pressure head 8 is preferably provided with a recess 15 having upon the bottom thereof an upwardly projecting piercing tube 16 which communicates through a passage 17 with the interior of the tube 16. The said piercing tube preferably has a sealing washer 18, which surrounds the said tube and rests upon the bottom of the recess 15, and the pressure tube 13 is provided with a suitable sealing washer 19 which surrounds it and engages the bottom of the pressure head 8.

if desired, the said pressure head may be provided with a series of storage recesses 20 for containing a sup- 2,747,770 Patented May 29, 1956 ply of extra pressure bulbs 21 of the conventional type clearly shown in Figs. 3 and 5.

In the use of my improved pressure applicator unit, a conventional container such as a can 22 is first pierced to provide a central opening in one end thereof for receiving the pressure tube 1 3 .and the said can is then placed within the cup-shaped base 5. The tube 13 is then inserted through the said opening and the pressure head 8 is placed over the top of the base 5. A bulb 21 is then placed in the recess 15, over the piercing :tube 16, and the cover 7 is threaded onto the base 5 so as to force the said bulb 21 downwardly upon the piercing tube 16, which penetrates the bottom of the bulb, and into engagement with the sealing washer 18. At the same time, the sealing washer 19 is engaged by the end of the can 22 and thereby seals the opening around the tube-13;

The assembly of the parts as above described will cause the gas which is contained under pressure within the bulb 2-1. to pass through the piercing tube 16, the passage 17 and the tube 13 into the interior of the can 22. The said gas will also enter the recess 12 which, when the end of the valve 9 is inserted therein, provides a pressure chamber that is sealed by :thewasher 14.

When the unit is so assembled, it is ready to be used for spraying or otherwise dispensing the material within the can 22 by merely pressing downwardly upon the top of the valve 9 which will cause opening of the slit 23. The pressure in the can will then cause some of the material therein to be forced upwardly through the tube 13 and into the pressure chamber, at the bottom of the recess 12, where it will mix with the pressurized gas entering said chamber through the passage 17 and the tube 13 and will be forcibly expelled through the valve 9 and out of a suitable nozzle 24, in the form of a spray.

It will be understood from the above description that the sealing washers 14, 18 and 19 will prevent the escape of any gas that is derived from the bulb 21 so that the can of material placed therein will remain pressurized for a substantial period of time to permit the use of all of the material in said can. If it should be found that the gas from a single bulb has been consumed before the contents of the can have been entirely used, a new bulb may be placed in the recess 15 and pierced in the manner above described so as to supply more pressure to the can 22. This provides a considerable advantage over the conventional types of pressurized cans which are pre-charged with a pressure medium, since the pressure in such cans is frequently entirely exhausted before the entire contents of the can have been consumed and thereby results in the waste of a considerable amount of material.

Lt will be noted that in the embodiment shown, the head 8 has the projection S-a which extends upwardly therefrom and abuts the bottom of the cover 7 so that, upon the cover being threaded to the receptacle 5, it will force the head downwardly towards the container 22 and thereby squeeze the sealing washer 19 against the container and seal the opening through which the pressure tube therein extends.

I claim:

1. A pressure applicator including a receptacle for receiving a container therein, a cover threaded to said receptacle, a pressure head fitting within said cover, a pressure tube mounted on said head independently of the cover and extending downwardly from said pressure head and adapted to project into a container within said receptacle, a pressure chamber within said pressure head; said pressure tube opening into said chamber, a dispensing valve communicating with said pressure chamber, a recess in said pressure head for holding a pressure bulb, a tubular piercing member in said recess for piercing a a: pressure bulb therein, and means communicating said piercing member with the said pressure tube and chamber.

2. A pressure applicator including a receptacle for receiving a container therein, a cover threaded to said receptacle, a pressure head fitting Within said cover, a pressure tube mounted on said head independently of the cover and extending downwardly from said pressure head and adapted to project into a container within said receptacle, a tubular piercing member in said pressure head for piercing a pressure bulb, a passage communicating said piercing member with said pressure tube, and a dispensing valve secured to said pressure head and communicating with said pressure tube.

3. A pressure applicator including a receptacle adapted to receive a container, a cover threaded to said receptacle, a pressure head within said cover and resting upon the top of the receptacle, the said pressure head having a pressure tube extending downwardly therefrom and adapted to project into a container within the receptacle, an axial recess in the pressure head communicating with the said pressure tube, a valve communicating with said axial recess, a separate recess in the pressure head for receiving a pressure bulb, :a tubular piercing member extending upwardly from the bottom of the separate recess and adapted to pierce and project into a pressure bulb contained therein, a sealing member surrounding said piercing member and adapted to engage the bottom of the pressure bulb to seal the opening therein through which the piercing member extends, a passage in said head extending through and communicating the piercing member with the pressure tube and the pressure chamber, and a portion on said cover engageable with the bulb for forcing it downwardly over the piercing member as the cover is threaded onto the receptacle.

References Cited in the file of this patent UNITED STATES PATENTS

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