CA2122313A1 - Device for supplying a liquid under pressure or compressed air - Google Patents
Device for supplying a liquid under pressure or compressed airInfo
- Publication number
- CA2122313A1 CA2122313A1 CA002122313A CA2122313A CA2122313A1 CA 2122313 A1 CA2122313 A1 CA 2122313A1 CA 002122313 A CA002122313 A CA 002122313A CA 2122313 A CA2122313 A CA 2122313A CA 2122313 A1 CA2122313 A1 CA 2122313A1
- Authority
- CA
- Canada
- Prior art keywords
- container
- bag
- liquid
- water
- tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D83/00—Containers or packages with special means for dispensing contents
- B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
- B65D83/60—Contents and propellant separated
- B65D83/62—Contents and propellant separated by membrane, bag, or the like
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F1/00—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped
- F04F1/06—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped the fluid medium acting on the surface of the liquid to be pumped
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Loading And Unloading Of Fuel Tanks Or Ships (AREA)
Abstract
A device is provided for supplying a liquid under pressure or compressed air, which comprises a rigid water impermeable container and a flexible liquid impermeable bag within the container which can be filled with the liquid to be supplied under pressure through a suitable outlet. The container is also provided with means to fill it with water under pressure from a standard water supply system, thereby squeezing the bag and evacuating the liquid therefrom under an equivalent pressure, which liquid is then supplied to a desired area. The container can also be provided with an air inlet-outlet tube through which it can be filled with air when empty and then, when filled with water, air pressure is built-up in the upper portion of the container that can be used to fill tires and the like.
Description
212231 ~
DEVICE FOR SUPPLYING A LIQUID UNDER
PRESSURE OR coMp~ ~n AIR
This invention primarily relates to a novel device for supplying a liquid under pressure for any given purpose. In addition the device can be adapted to supply compressed air for filling tires and the like.
It is well known that in campers, mobile homes, barns and the like, which are left unheated during the winter season, it is necessary to empty the water pipes and any water tanks so that they would not freeze and burst during winter. The water pipes and tanks are then left empty or filled with antifreeze to protect them against damage. In most campers, for example, there is a five gallon hot water tank which, during the camping season provides hot water through pipes leading to the faucet, the shower and the like. There are also cold water pipes which are normally connected to the cold water supply at the campsite.
In winter, this water tank and piping are normally emptied and replaced with antifreeze to make sure that some water is not left in some areas that could freeze and damage the system. Replacement of water with antifreeze is usually a difficult and time consuming operation. First the tank and piping are emptied either by gravity or with the assistance of compressed air, and then the tank and piping are filled with antifreeze. All this usually takes several hours.
It is an object of the present invention to obviate the above difficulties and to provide a device which will supply antifreeze into the system and replace water that was present therein within a few minutes. Other liquids can, of course, be supplied by such device in a similar manner.
Another object of the present invention is to provide a device which, in addition, could be used to supply compressed air at a pressure suitable for filling tires and the like.
Other objects and advantages of the present invention will become apparent from the following description thereof.
The device of the present invention comprises: a rigid, water impermeable container; a flexible, liquid impermeable bag within said container; means for filling said bag with the liquid to be supplied under pressure; an outlet for evacuating said liquid under pressure; means for filling said rigid container with water under pressure, thereby compressing said bag and evacuating said liquid from said bag under an equivalent pressure; and means for emptying the water from said rigid container. Also, preferably, means are provided within the bag for maintaining said bag in a predetermined position when the bag is empty or while evacuation said liquid from said bag.
Since most water supply systems provide water at a pressure of between about 40 and 90 psi (275-620 KPa), the rigid container is normally a tank capable of withstanding pressures of up to about 100 psi (~700 KPa), and can be made of suitable material for that purpose such as galvanized steel or the like. Some plastic materials can _ -3 also be suitable for this purpose. The flexible bag within the rigid container can be made of suitable polymeric material which, preferably, is also expandable, such as a rubber balloon. This bag can be filled with a liquid, such as an antifreeze, via a tube extending through the wall of the rigid container so that one end of this tube projects inside the container and the other outside. The edges of the tube are secured to the wall of the container in an airtight and watertight manner to maintain the impermeable nature of the container. The open end of the bag is secured to the end of the tube which projects inside the container in a liquid tight manner and the end of the tube which projects outside of the container is provided with a valve which, when open, will allow the filling of the bag with the liquid from the outside.
Preferably, the tube through which the bag is filled with the liquid is secured at the top end of the container when the latter is in its normal operating position. This allows the filling to be done by gravity. Also, preferably, the end of the tube projecting inside the container projects some distance into the bag and is provided with a plurality of small holes or openings over its body and at its bottom so as to allow a free flow of the liquid therethrough, but to prevent the bag from penetrating into the tube's bottom opening when the bag is emptied or when air pressure is applied on the bag from the outside.
The same tube that is used for filling the bag can also be used for evacuating the liquid from the bag. If the liquid is to be supplied to a piping system, then a hose can be attached to the end of the tube extending outside of the rigid container and the liquid can then be evacuated through said hose into the piping system. As an alternative, the end of the tube outside of the container can be branched out into two tubular projections, each being provided with a valve and one serving to fill the bag with the liquid while the other to evacuate the liquid from said bag. In order to effect the evacuation of the liquid under pressure, the rigid container is filled with water via a tube or a pipe projecting through the wall of the rigid container and, on the outside, attachable to a supply of water under pressure, such as a water main. This tube or pipe is usually positioned at the bottom end of the container. The end of the tube for filling the container with water, which is within the container, is also preferably provided with a cap or the like, having a plurality of small openings or holes so that the end of the bag, when filled with the liquid, will not penetrate into this tube. The tube or pipe attachable to the supply of water is provided with a valve and the same tube or pipe can serve for the filling of the rigid container with water and for the emptying of said container. Also, this tube or pipe can be branched out into two tubular projections each with a valve and one of which can be used for filling the container with water while the other for emptying the water from the container.
In addition, the device of the present invention may be provided with an air inlet-outlet tube at the upper end of the rigid container having a valve therein which allows air to penetrate into the container when it is open and allowing air pressure to build-up within the container when the valve is closed and the container is being filled with water while the bag is essentially empty. Thus, when the valve of the air inlet-outlet tube is closed and water is introduced into the container, air will be compressed above the water level in the container and the pressure of said compressed air will essentially correspond to the pressure of the injected water, namely between 40 and 90 psi (275-620 KPa). When such pressure is reached, no more water can be introduced into the container since the pressure of water and air will be in equilibrium.
Then, the valve of the inlet-outlet tube may be opened to obtain compressed air suitable for filling tires and the like. In such event a compressed air hose will be attached to the inlet-outlet tube having a push-valve at its end suitable for use with tire valves. As the compressed air is ejected from the tank, the water level will rise in the tank. To avoid that water penetrates into the air hose, there may be provided, between the air inlet-outlet tube and the compressed air hose, a chamber with a floater which will close the opening leading to the hose before any water can penetrate thereinto. Finally, the container can be provided with a handle such that various hoses can be wrapped around it for storage.
The invention will now be described with reference to the accompanying drawings in which:
Fig. 1 is a side view of an embodiment of the device in accordance with the present invention, also showing the inside thereof;
Fig. 2 is a side view similar to that shown in Fig. 1, but where the bag is filled with liquid;
Fig. 3 is a side view similar to that shown in Fig. 1 and Fig. 2, but where the bag is being compressed with water and the liquid is evacuated through a tube;
Fig. 4 is a side view of another embodiment of the device in accordance with the present inventions, also showing the inside thereof;
Fig. 5 is a side view of the chamber above the air inlet-outlet tube, also showing the inside thereof; and Fig. 6 is a section view along line A-A of Fig. 1.
Referring to Fig. 1, the embodiment of the device shown therein comprises a tank 10 which is preferably made of galvanized steel and which has a base 12 so that it can be positioned flat on a surface in the upright position.
Tanks of various capacities can be used, although a 5 gallon (22.7 liter) tank was found to be particularly suitable. Within this tank 10, there is provided a bag 14 the open end of which is attached to the end of tube 16 which is inside of the tank 10. The attachment can be done by means of a suitable bracket 18. Tube 16 passes through the top wall of the tank which can be in the form of a plate 20 that can be screwed onto the tank in an air-tight ~1~2313 manner. Of course tube 16 and plate 20 are connected to each other in an air-tight manner as well. The end of tube 16 inside the tank 10 may be provided with a rigid tubular projection 17 extending into the bag 14 and having a plurality of openings or holes 19 over its body. This is usually a plastic tube which at its-bottom is preferably provided with a cap 21 the bottom of which is also formed of a plurality of openings or holes. This rigid projection allows the bag 14 to be maintained in a predetermined position when the bag is empty or is being emptied and to avoid formation within the bag of undesirable pockets where liquid may be trapped, or the like.
The end of the tube 16 outside of the tank 10 has, in this embodiment, two branched-out tubular projections 22 and 24 with valves 26 and 28 respectively. When bag 14 is to be filled with a liquid, such as antifreeze, valve 26 is opened and the liquid 30 is introduced using, for example, funnel 32.
When bag 14 is essentially full or filled with the desired volume of liquid 30 as shown in Fig. 2, where the same reference numbers represent the same elements of the device (and this applies to all figures herein), the device is ready to evacuate this liquid 30 through the outlet 24 and hose 34.
Fig. 3 shows how the liquid 30 is evacuated through outlet 24 and supplied under pressure by hose 34 to a desired area. This is done by introducing water 36 under pressure, such as that from a water main, into tank 10 through tube or pipe 38. As the water level rises in tank 10, the flexible bag 14 is pushed up and liquid 30 is evacuated through outlet 24 with valve 28 being open. If the bag is provided with internal tubular projection 17 having holes 19 therein as well as at its bottom, then liquid 30 flows through these holes first and then through the outlet 24. Water is introduced at the end 40 of the tube or pipe 38 which has a valve 42 that is opened for that purpose. Once tank 10 is essentially filled with water 36 and bag 14 is essentially empty, water 36 is normally evacuated from the tank through end 44 of tube or pipe 38 by opening valve 46 while closing valve 42. The tube or pipe 38 projects into tank 10 through plate 48 similar to plate 20 used for tube 16 and is covered with cap 49 having a plurality of small holes or openings therein.
The liquid 30, such as antifreeze, can be supplied through hose 34, into the piping system of a camper or a mobile home or the like where it will displace the water for the winter season. It is unnecessary to remove the water from the water tank in the camper or from the pipes before injecting the antifreeze. Simply the end 33 of hose 34 is attached to one end of the camper piping while the drainage plug is removed and the antifreeze 30 will replace the water in the system in a few minutes. When one notices that antifreeze (which is easy to notice due to its colour) starts flowing out of the drain pipe, that means that the system has been emptied of water and replaced by the antifreeze. If the initial amount of the antifreeze in bag 212231~
g 14 is insufficient, the procedure can be easily repeated until all water in the system has been replaced.
Obviously, the device of the present invention is not limited to the supply of antifreeze. Such device can be used for any supply of a liquid under pressure. For example, one could use it for spraying liquid fertilizers or insecticides or herbicides or the like or for any other purpose where a predetermined quantity of a given liquid needs to be supplied to a given system or area. However, care must be taken not to contaminate, for example, the water system in a camper with toxic substances and for this reason either separate devices or separate bags should be used for different applications, particularly when contaminants are involved.
In another embodiment of this invention, as illustrated in Fig. 4, tank 10 can be provided with an air inlet-outlet tube 50 at its upper end, which also has a valve 52 which, when open allows air to penetrate inside tank 10 when there is no water 36 therein. Thus, when water has been removed from the tank through outlet 44 and bag 14 is essentially empty the tank can be filled with air by opening valve 52. Then, valve 52 is closed and water 36 is introduced into tank 10 through inlet 40 and pipe 38. For this purpose valve 46 is closed and valve 42 is opened.
Water is introduced from a water main or a similar water supply system at a pressure of 40-90 psi (275-620 KPa). As water level 54 rises the air pressure in the upper area 56 of the tank also increases until an equilibrium is achieved. At this stage the compressed air in the upper area 56 corresponds to the water pressure and is usually between 40-90 psi (275-620 KPa), which is quite sufficient for filling tires and the like. Thus a compressed air tire hose 58 can be attached to the inlet-outlet tube 50 and then, when valve 52 is opened, compressed air will be supplied via this hose 58 to tires or the like. It should be mentioned here that, for example, in campers, tires often become soft after the summer season, and thus the device of the present invention can be used for the dual purpose of replacing the water in the piping system with antifreeze and filling the tires.
While compressed air is removed through the inlet-outlet tube 50 and hose 58 which at its end is provided with a push-valve 60 normally used in tire hoses, water 36 continues to be introduced through pipe 38 into tank 10 to maintain the air pressure in the upper area 56 of the tank.
Thus, level 54 continues to rise until essentially the entire tank is filled. To avoid that water would flow into tube 58, a chamber 62 is provided above the inlet-outlet tube 50 with a floating spherical valve 64. This is better illustrated in Fig. 5. The spherical valve 64 does not prevent air from passing through chamber 62, however, when water 36 penetrates thereinto, the floating sphere 64 would float thereon and at one point would block the outlet 66 so that no water could flow therethrough into hose 58.
Also, when compressed air is formed in compartment 56, the bag 14 is pushed upward or is pressed against tube 17 and to avoid that it could penetrate into the open bottom end of tube 17 within the tank, this end is provided with a cap 21 which has a plurality of holes or openings 23 therein as shown in Fig. 6. Similar cap 49 can be provided at the inside-the-tank end of pipe 38.
Finally, tank 10 can also be provided with a suitable handle 70. This handle can be so formed as to wrap hoses such as 34 and 58 around it for storage. This can be achieved by having ends 72, 74 of the handle 70 extend beyond the middle section 76 which is attached to the tank, thereby allowing the hoses to be wrapped around said middle section 76 and to be retained in place by said extending ends 72, 74.
It will be appreciated that the device of the present invention provides a simple and efficient means of supplying liquid under pressure and, optionally compressed air without use of electric compressors and the like. The device is extremely sturdy since it has essentially no moving parts, except perhaps for the bag which, when it is filled with liquid and emptied, expands or contracts accordingly. If the bag breaks or is perforated, which would be very unusual, it can be easily replaced by unscrewing the plate at the top of the container, replacing the bag and screwing the plate again.
Although the invention has been described with reference to specific preferred embodiments, it should be understood that many modifications may be made which would be obvious to a person familiar with this art, without departing from the spirit of this invention and the scope of the following claims.
DEVICE FOR SUPPLYING A LIQUID UNDER
PRESSURE OR coMp~ ~n AIR
This invention primarily relates to a novel device for supplying a liquid under pressure for any given purpose. In addition the device can be adapted to supply compressed air for filling tires and the like.
It is well known that in campers, mobile homes, barns and the like, which are left unheated during the winter season, it is necessary to empty the water pipes and any water tanks so that they would not freeze and burst during winter. The water pipes and tanks are then left empty or filled with antifreeze to protect them against damage. In most campers, for example, there is a five gallon hot water tank which, during the camping season provides hot water through pipes leading to the faucet, the shower and the like. There are also cold water pipes which are normally connected to the cold water supply at the campsite.
In winter, this water tank and piping are normally emptied and replaced with antifreeze to make sure that some water is not left in some areas that could freeze and damage the system. Replacement of water with antifreeze is usually a difficult and time consuming operation. First the tank and piping are emptied either by gravity or with the assistance of compressed air, and then the tank and piping are filled with antifreeze. All this usually takes several hours.
It is an object of the present invention to obviate the above difficulties and to provide a device which will supply antifreeze into the system and replace water that was present therein within a few minutes. Other liquids can, of course, be supplied by such device in a similar manner.
Another object of the present invention is to provide a device which, in addition, could be used to supply compressed air at a pressure suitable for filling tires and the like.
Other objects and advantages of the present invention will become apparent from the following description thereof.
The device of the present invention comprises: a rigid, water impermeable container; a flexible, liquid impermeable bag within said container; means for filling said bag with the liquid to be supplied under pressure; an outlet for evacuating said liquid under pressure; means for filling said rigid container with water under pressure, thereby compressing said bag and evacuating said liquid from said bag under an equivalent pressure; and means for emptying the water from said rigid container. Also, preferably, means are provided within the bag for maintaining said bag in a predetermined position when the bag is empty or while evacuation said liquid from said bag.
Since most water supply systems provide water at a pressure of between about 40 and 90 psi (275-620 KPa), the rigid container is normally a tank capable of withstanding pressures of up to about 100 psi (~700 KPa), and can be made of suitable material for that purpose such as galvanized steel or the like. Some plastic materials can _ -3 also be suitable for this purpose. The flexible bag within the rigid container can be made of suitable polymeric material which, preferably, is also expandable, such as a rubber balloon. This bag can be filled with a liquid, such as an antifreeze, via a tube extending through the wall of the rigid container so that one end of this tube projects inside the container and the other outside. The edges of the tube are secured to the wall of the container in an airtight and watertight manner to maintain the impermeable nature of the container. The open end of the bag is secured to the end of the tube which projects inside the container in a liquid tight manner and the end of the tube which projects outside of the container is provided with a valve which, when open, will allow the filling of the bag with the liquid from the outside.
Preferably, the tube through which the bag is filled with the liquid is secured at the top end of the container when the latter is in its normal operating position. This allows the filling to be done by gravity. Also, preferably, the end of the tube projecting inside the container projects some distance into the bag and is provided with a plurality of small holes or openings over its body and at its bottom so as to allow a free flow of the liquid therethrough, but to prevent the bag from penetrating into the tube's bottom opening when the bag is emptied or when air pressure is applied on the bag from the outside.
The same tube that is used for filling the bag can also be used for evacuating the liquid from the bag. If the liquid is to be supplied to a piping system, then a hose can be attached to the end of the tube extending outside of the rigid container and the liquid can then be evacuated through said hose into the piping system. As an alternative, the end of the tube outside of the container can be branched out into two tubular projections, each being provided with a valve and one serving to fill the bag with the liquid while the other to evacuate the liquid from said bag. In order to effect the evacuation of the liquid under pressure, the rigid container is filled with water via a tube or a pipe projecting through the wall of the rigid container and, on the outside, attachable to a supply of water under pressure, such as a water main. This tube or pipe is usually positioned at the bottom end of the container. The end of the tube for filling the container with water, which is within the container, is also preferably provided with a cap or the like, having a plurality of small openings or holes so that the end of the bag, when filled with the liquid, will not penetrate into this tube. The tube or pipe attachable to the supply of water is provided with a valve and the same tube or pipe can serve for the filling of the rigid container with water and for the emptying of said container. Also, this tube or pipe can be branched out into two tubular projections each with a valve and one of which can be used for filling the container with water while the other for emptying the water from the container.
In addition, the device of the present invention may be provided with an air inlet-outlet tube at the upper end of the rigid container having a valve therein which allows air to penetrate into the container when it is open and allowing air pressure to build-up within the container when the valve is closed and the container is being filled with water while the bag is essentially empty. Thus, when the valve of the air inlet-outlet tube is closed and water is introduced into the container, air will be compressed above the water level in the container and the pressure of said compressed air will essentially correspond to the pressure of the injected water, namely between 40 and 90 psi (275-620 KPa). When such pressure is reached, no more water can be introduced into the container since the pressure of water and air will be in equilibrium.
Then, the valve of the inlet-outlet tube may be opened to obtain compressed air suitable for filling tires and the like. In such event a compressed air hose will be attached to the inlet-outlet tube having a push-valve at its end suitable for use with tire valves. As the compressed air is ejected from the tank, the water level will rise in the tank. To avoid that water penetrates into the air hose, there may be provided, between the air inlet-outlet tube and the compressed air hose, a chamber with a floater which will close the opening leading to the hose before any water can penetrate thereinto. Finally, the container can be provided with a handle such that various hoses can be wrapped around it for storage.
The invention will now be described with reference to the accompanying drawings in which:
Fig. 1 is a side view of an embodiment of the device in accordance with the present invention, also showing the inside thereof;
Fig. 2 is a side view similar to that shown in Fig. 1, but where the bag is filled with liquid;
Fig. 3 is a side view similar to that shown in Fig. 1 and Fig. 2, but where the bag is being compressed with water and the liquid is evacuated through a tube;
Fig. 4 is a side view of another embodiment of the device in accordance with the present inventions, also showing the inside thereof;
Fig. 5 is a side view of the chamber above the air inlet-outlet tube, also showing the inside thereof; and Fig. 6 is a section view along line A-A of Fig. 1.
Referring to Fig. 1, the embodiment of the device shown therein comprises a tank 10 which is preferably made of galvanized steel and which has a base 12 so that it can be positioned flat on a surface in the upright position.
Tanks of various capacities can be used, although a 5 gallon (22.7 liter) tank was found to be particularly suitable. Within this tank 10, there is provided a bag 14 the open end of which is attached to the end of tube 16 which is inside of the tank 10. The attachment can be done by means of a suitable bracket 18. Tube 16 passes through the top wall of the tank which can be in the form of a plate 20 that can be screwed onto the tank in an air-tight ~1~2313 manner. Of course tube 16 and plate 20 are connected to each other in an air-tight manner as well. The end of tube 16 inside the tank 10 may be provided with a rigid tubular projection 17 extending into the bag 14 and having a plurality of openings or holes 19 over its body. This is usually a plastic tube which at its-bottom is preferably provided with a cap 21 the bottom of which is also formed of a plurality of openings or holes. This rigid projection allows the bag 14 to be maintained in a predetermined position when the bag is empty or is being emptied and to avoid formation within the bag of undesirable pockets where liquid may be trapped, or the like.
The end of the tube 16 outside of the tank 10 has, in this embodiment, two branched-out tubular projections 22 and 24 with valves 26 and 28 respectively. When bag 14 is to be filled with a liquid, such as antifreeze, valve 26 is opened and the liquid 30 is introduced using, for example, funnel 32.
When bag 14 is essentially full or filled with the desired volume of liquid 30 as shown in Fig. 2, where the same reference numbers represent the same elements of the device (and this applies to all figures herein), the device is ready to evacuate this liquid 30 through the outlet 24 and hose 34.
Fig. 3 shows how the liquid 30 is evacuated through outlet 24 and supplied under pressure by hose 34 to a desired area. This is done by introducing water 36 under pressure, such as that from a water main, into tank 10 through tube or pipe 38. As the water level rises in tank 10, the flexible bag 14 is pushed up and liquid 30 is evacuated through outlet 24 with valve 28 being open. If the bag is provided with internal tubular projection 17 having holes 19 therein as well as at its bottom, then liquid 30 flows through these holes first and then through the outlet 24. Water is introduced at the end 40 of the tube or pipe 38 which has a valve 42 that is opened for that purpose. Once tank 10 is essentially filled with water 36 and bag 14 is essentially empty, water 36 is normally evacuated from the tank through end 44 of tube or pipe 38 by opening valve 46 while closing valve 42. The tube or pipe 38 projects into tank 10 through plate 48 similar to plate 20 used for tube 16 and is covered with cap 49 having a plurality of small holes or openings therein.
The liquid 30, such as antifreeze, can be supplied through hose 34, into the piping system of a camper or a mobile home or the like where it will displace the water for the winter season. It is unnecessary to remove the water from the water tank in the camper or from the pipes before injecting the antifreeze. Simply the end 33 of hose 34 is attached to one end of the camper piping while the drainage plug is removed and the antifreeze 30 will replace the water in the system in a few minutes. When one notices that antifreeze (which is easy to notice due to its colour) starts flowing out of the drain pipe, that means that the system has been emptied of water and replaced by the antifreeze. If the initial amount of the antifreeze in bag 212231~
g 14 is insufficient, the procedure can be easily repeated until all water in the system has been replaced.
Obviously, the device of the present invention is not limited to the supply of antifreeze. Such device can be used for any supply of a liquid under pressure. For example, one could use it for spraying liquid fertilizers or insecticides or herbicides or the like or for any other purpose where a predetermined quantity of a given liquid needs to be supplied to a given system or area. However, care must be taken not to contaminate, for example, the water system in a camper with toxic substances and for this reason either separate devices or separate bags should be used for different applications, particularly when contaminants are involved.
In another embodiment of this invention, as illustrated in Fig. 4, tank 10 can be provided with an air inlet-outlet tube 50 at its upper end, which also has a valve 52 which, when open allows air to penetrate inside tank 10 when there is no water 36 therein. Thus, when water has been removed from the tank through outlet 44 and bag 14 is essentially empty the tank can be filled with air by opening valve 52. Then, valve 52 is closed and water 36 is introduced into tank 10 through inlet 40 and pipe 38. For this purpose valve 46 is closed and valve 42 is opened.
Water is introduced from a water main or a similar water supply system at a pressure of 40-90 psi (275-620 KPa). As water level 54 rises the air pressure in the upper area 56 of the tank also increases until an equilibrium is achieved. At this stage the compressed air in the upper area 56 corresponds to the water pressure and is usually between 40-90 psi (275-620 KPa), which is quite sufficient for filling tires and the like. Thus a compressed air tire hose 58 can be attached to the inlet-outlet tube 50 and then, when valve 52 is opened, compressed air will be supplied via this hose 58 to tires or the like. It should be mentioned here that, for example, in campers, tires often become soft after the summer season, and thus the device of the present invention can be used for the dual purpose of replacing the water in the piping system with antifreeze and filling the tires.
While compressed air is removed through the inlet-outlet tube 50 and hose 58 which at its end is provided with a push-valve 60 normally used in tire hoses, water 36 continues to be introduced through pipe 38 into tank 10 to maintain the air pressure in the upper area 56 of the tank.
Thus, level 54 continues to rise until essentially the entire tank is filled. To avoid that water would flow into tube 58, a chamber 62 is provided above the inlet-outlet tube 50 with a floating spherical valve 64. This is better illustrated in Fig. 5. The spherical valve 64 does not prevent air from passing through chamber 62, however, when water 36 penetrates thereinto, the floating sphere 64 would float thereon and at one point would block the outlet 66 so that no water could flow therethrough into hose 58.
Also, when compressed air is formed in compartment 56, the bag 14 is pushed upward or is pressed against tube 17 and to avoid that it could penetrate into the open bottom end of tube 17 within the tank, this end is provided with a cap 21 which has a plurality of holes or openings 23 therein as shown in Fig. 6. Similar cap 49 can be provided at the inside-the-tank end of pipe 38.
Finally, tank 10 can also be provided with a suitable handle 70. This handle can be so formed as to wrap hoses such as 34 and 58 around it for storage. This can be achieved by having ends 72, 74 of the handle 70 extend beyond the middle section 76 which is attached to the tank, thereby allowing the hoses to be wrapped around said middle section 76 and to be retained in place by said extending ends 72, 74.
It will be appreciated that the device of the present invention provides a simple and efficient means of supplying liquid under pressure and, optionally compressed air without use of electric compressors and the like. The device is extremely sturdy since it has essentially no moving parts, except perhaps for the bag which, when it is filled with liquid and emptied, expands or contracts accordingly. If the bag breaks or is perforated, which would be very unusual, it can be easily replaced by unscrewing the plate at the top of the container, replacing the bag and screwing the plate again.
Although the invention has been described with reference to specific preferred embodiments, it should be understood that many modifications may be made which would be obvious to a person familiar with this art, without departing from the spirit of this invention and the scope of the following claims.
Claims (25)
1. A device for supplying a liquid under pressure which comprises: a rigid, water impermeable container; a flexible, liquid impermeable bag within said container;
means for filling said bag with the liquid to be supplied under pressure; an outlet for evacuating said liquid from said bag under pressure; means for filling said rigid container with water under pressure, thereby compressing said bag and evacuating said liquid from said bag under an equivalent pressure; and means for emptying the water from said rigid container.
means for filling said bag with the liquid to be supplied under pressure; an outlet for evacuating said liquid from said bag under pressure; means for filling said rigid container with water under pressure, thereby compressing said bag and evacuating said liquid from said bag under an equivalent pressure; and means for emptying the water from said rigid container.
2. A device according to claim 1, further comprising means within the bag for maintaining said bag in a predetermined position when the bag is empty or while evacuating said liquid from said bag.
3. A device according to claim 1, in which said container is a tank capable of withstanding pressures of up to about 100 psi.
4. A device according to claim 3, wherein said tank is made of galvanized steel.
5. A device according to claim 1, wherein said bag is made of an expandable material.
6. A device according to claim 5, wherein said bag is a rubber balloon.
7. A device according to claim 1, wherein said means for filling said bag with the liquid comprises a tube extending through the wall of the rigid container with one end projecting inside the container and the other outside, the open end of the bag being secured in a liquid tight manner to the end of the tube that projects inside the container, and the end of the tube projecting outside of the container being provided with a valve, the bag being adapted to be filled with the liquid through said end projecting outside of the container when the valve is open.
8. A device according to claim 7, wherein said means for filling said bag with the liquid are provided at the top end of the container, when the latter is in its normal operating position.
9. A device according to claim 7, wherein the end of said tube projecting inside the container is provided with a plurality of small openings.
10. A device according to claim 7, wherein the end of the tube projecting inside the container has a rigid tubular projection extending into the bag and having small holes or openings over its body and at its bottom.
11. A device according to claim 10, wherein the tubular projection is adopted to maintain the bag in a predetermined position when said bag is empty or is being emptied.
12. A device according to claim 11, wherein the tubular projection is made of plastic.
13. A device according to claim 7, wherein said tube also serves as outlet for evacuating the liquid from the bag.
14. A device according to claim 13, wherein the end of said tube outside the container is branched out into two tubular projections, each being provided with a valve, one of said projections serving to fill the bag with the liquid and the other as the outlet to evacuate the liquid from the bag under pressure.
15. A device according to claim 14, further comprising a hose one end of which is attachable to the outlet and through which said liquid is supplied under pressure to a desired area.
16. A device according to claim 1, wherein said means for filling the container with water comprise a tube or a pipe projecting through the wall of said container and, on the outside, being attachable to a supply of water under pressure.
17. A device according to claim 16, wherein said means for filling the container with water are provided at the bottom of said container, when the latter is in its normal operating position.
18. A device according to claim 16, wherein the end of the tube or pipe projecting inside the container is provided with a plurality of small openings.
19. A device according to claim 16, wherein the part of the tube or pipe attachable to the supply of water is provided with a valve.
20. A device according to claim 16, wherein said means for filling said container with water also serve for emptying said container.
21. A device according to claim 16, wherein the tube or pipe projecting outside of the container is branched out into two tubular projections, each with a valve, and one of which is used for filling the container with water while the other for emptying the water from the container.
22. A device according to claim 1, further comprising an air inlet-outlet tube at the upper end of the rigid container with a valve therein allowing air to penetrate into the container when the valve is open and allowing air pressure to build-up within the container when the valve is closed and the container is being filled with water while the bag is essentially empty.
23. A device according to claim 22, wherein above the air inlet-outlet tube, there is provided a chamber with a floater and an opening connectable to a compressed air hose, said floater closing said opening before any water can penetrate into the hose.
24. A device according to claim 23, wherein the compressed air hose comprises a push-valve at its outer end suitable for filling tires with compressed air.
25. A device according to claim 1, wherein the container is provided with a handle such that hoses can be wrapped around it for storage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002122313A CA2122313A1 (en) | 1994-04-27 | 1994-04-27 | Device for supplying a liquid under pressure or compressed air |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002122313A CA2122313A1 (en) | 1994-04-27 | 1994-04-27 | Device for supplying a liquid under pressure or compressed air |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2122313A1 true CA2122313A1 (en) | 1995-10-28 |
Family
ID=4153473
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002122313A Abandoned CA2122313A1 (en) | 1994-04-27 | 1994-04-27 | Device for supplying a liquid under pressure or compressed air |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2122313A1 (en) |
-
1994
- 1994-04-27 CA CA002122313A patent/CA2122313A1/en not_active Abandoned
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |