CA1222373A - Plant watering device - Google Patents
Plant watering deviceInfo
- Publication number
- CA1222373A CA1222373A CA000508516A CA508516A CA1222373A CA 1222373 A CA1222373 A CA 1222373A CA 000508516 A CA000508516 A CA 000508516A CA 508516 A CA508516 A CA 508516A CA 1222373 A CA1222373 A CA 1222373A
- Authority
- CA
- Canada
- Prior art keywords
- water
- receptacle
- air
- reservoir
- air space
- 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.)
- Expired
Links
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G27/00—Self-acting watering devices, e.g. for flower-pots
- A01G27/02—Self-acting watering devices, e.g. for flower-pots having a water reservoir, the main part thereof being located wholly around or directly beside the growth substrate
Landscapes
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Cultivation Receptacles Or Flower-Pots, Or Pots For Seedlings (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
An intermittently operating watering device has a water reservoir for supplying successive flows of water to a pair of receptacles which are separated from one another by a weir. The water also flows into an air space where it covers the lower end of an air passage communicating with an air space at the top of the interior of the water reservoir so that, each time evaporation of the water uncovers the lower end of the air passage to allow the inflow of air, water is able to flow out from the water reservoir to the receptacles. The reservoir is in one of the receptacles and a plant in the other receptacle is irrigated at successive intervals of time.
An intermittently operating watering device has a water reservoir for supplying successive flows of water to a pair of receptacles which are separated from one another by a weir. The water also flows into an air space where it covers the lower end of an air passage communicating with an air space at the top of the interior of the water reservoir so that, each time evaporation of the water uncovers the lower end of the air passage to allow the inflow of air, water is able to flow out from the water reservoir to the receptacles. The reservoir is in one of the receptacles and a plant in the other receptacle is irrigated at successive intervals of time.
Description
~223~3 The present invention relates to a watering device and is useful, in particular, for watering plants.
r t has already been well recognized that there is a need for a plant watering device which will ensure an a~lequate supply of water to A plant aEter a considerable lapse of time and without human intervention, after initial setting up of the device.
Thus, Eor e~ample, a person leaving his or her dwelling Eor a period of time, ~or example for the p~rpose of a vacation, often requires to ensure that a plant in the dwelling is adequately irrigated durlng that period o time but, nevertheless~ frequently desires to avoid overwatering of the plant and, also, to avoid granting acces~s to another person to the dwelllng for the purpose of watering the plant.
Various attempts have been made in the past to provlde a watering device which fulEills such a purpose by providing a constant, possibly very slow, supply oE water to a plant, or by e~fecting a delayed supply of water to the plant.
For example, one prior watering device comprises a tray to be placed under a pot containing the plant, with a wick extending from the tray through the base of the pot and terminating in a potting mix within the pot, so that water is drawn up the wick by a wicking action.
Another prior device comprises a large tray fitted with a porous styroEoam base Eor a plant pot and, in that case, moisture percolated up to the pot Erom the tray by capillary action through the styroEoam base.
~nother prior suggestion is a cone shaped device made of pottery, which is glazed at the open end oE the cone-shaped device, the opposite, pointed end of the device being closed but remaining unglazed, so that when the cone is inverted and pushed into the soil, and the inside oE the device is filled with water, the water is slowly released through the pointed end of the device to water the plant and, thereby, to prevent it Erom drying out.
1~
r t has already been well recognized that there is a need for a plant watering device which will ensure an a~lequate supply of water to A plant aEter a considerable lapse of time and without human intervention, after initial setting up of the device.
Thus, Eor e~ample, a person leaving his or her dwelling Eor a period of time, ~or example for the p~rpose of a vacation, often requires to ensure that a plant in the dwelling is adequately irrigated durlng that period o time but, nevertheless~ frequently desires to avoid overwatering of the plant and, also, to avoid granting acces~s to another person to the dwelllng for the purpose of watering the plant.
Various attempts have been made in the past to provlde a watering device which fulEills such a purpose by providing a constant, possibly very slow, supply oE water to a plant, or by e~fecting a delayed supply of water to the plant.
For example, one prior watering device comprises a tray to be placed under a pot containing the plant, with a wick extending from the tray through the base of the pot and terminating in a potting mix within the pot, so that water is drawn up the wick by a wicking action.
Another prior device comprises a large tray fitted with a porous styroEoam base Eor a plant pot and, in that case, moisture percolated up to the pot Erom the tray by capillary action through the styroEoam base.
~nother prior suggestion is a cone shaped device made of pottery, which is glazed at the open end oE the cone-shaped device, the opposite, pointed end of the device being closed but remaining unglazed, so that when the cone is inverted and pushed into the soil, and the inside oE the device is filled with water, the water is slowly released through the pointed end of the device to water the plant and, thereby, to prevent it Erom drying out.
1~
- 2 It will be appreciated that tlle above-described devices are intended to efect constant watering of a plant, rather than providing a delayed supply of water to the plant aEter a period of time during which no watering occurs.
A further prior art watering device is ahown in Urlited States Patent 267,296, which teaches a selE-irrigating flower pot or vase in which apertures allow water to pass -from a reservoir into a saucer and then into tt~e pot. Evaporation from the saucer and absorption oE
water in the pot cause the liquid level in the saucer to Eall below the apertures, which alLows further wate~ to ~low from the reservoir. Once again, thls prior device constantly waters the pot.
United States Patent 3,125,255, issued March 17, 1964 to B. Kaiser, shows the use o~ evaporation Erom an / auxiliary reservoir to control air Elow into a main reservoir and, thus, to control the outELow oE water Erom the main reservoir. More particularly, according to the teachings oE this prior device, evaporation from a so-called water receiver uncovers the lower end oE a tube, -to allow air to flow into a main container, which in turn allows water to Elow thereErom through an outlet.
While the device shown in the aEoresaid United 25 States Patent 3,125,255 efEects delayed watering oE a plant or tl~e like, by employing evaporation in a separate water chamber to delay the onset oE irrigation, as described above, it nevertheless simply allows a single flow of water ~Erorn the main container at a delayed period of time but in a continuous manner, and does not in any way enable an intermittent, i.e. repeated, watering action to be effected.
Furtller prior art watering devices are shown in United States Patents 3,438,575 4,060,93~ 4,085,546;
35 4,121,608; 4,241,538 and 4,542,762.
It is an object of the present invention to provide a novel and improved waterlng device which not only enables water to be supplied ater a predet:ermined 37~
delay, but also enables an intermittent supply of the water.
It is a fu~ther object of the present invention to enable a plant to be watered repeatedly, at successive time intervals.
It i8 a still further object oE the present invelltion to provide a watering device which delivers successive 10ws of water in dependence on the rate oE
evaporation of water from the device, so that in hot dry weather the device will dispense water more ~requently than during dampl cold conditions.
According to the present inventi~n, there is provided a watering device which has a reservoir defining a first air-tight space within an upper portion of the reservoir, a first water receptacle Eor receiving fLows oE
water Erom a water reservoir and a second water receptacle for receiving flows oE water Erom the first water receptacle.
A weir between the Eirst and second water receptacles retains the water at a Eirst predetermined level in the first receptacle to prevent unintended loss oE water Erom the reservoir.
For controlling the flow o water froln the water re.servoir to the water receptacles, there is provided a second air space which is ope~ to the atmosphere and an air passage having an open top end in the Eirst air space of the water reservoir and an open bottom end in the second air space.
l'he first receptacle communicates at a second predetermined level with the second air space, the second level being higher than the first predetermined level and, also, higher than the open bottom end of the air passage.
Consequently, when water is supplied from the water reservoir to flood the receptacles~ the open bottom end of the air passage thereaEter becomes ilnmersed, which prevents the further flow of water fro~ the water reservoir to the receptacles until evaporation o water from the second air space allows, once again, the entry of ~22~3 air through the air pas.sage into the Eir~st air space and~
thus, allows the flow of water from the water reservoir to Elood the fir.st and second receptacles.
The invention will be more readily apparent Erom the Eollowing description of embodimellts thereo.E given, by way of example, witll reference to the accompanying drawings, in which:-Figure 1 shows a view in side el.evation oE aplant watering device according to a preEerred embodiment, provided with a pot containing a plant Fiyure 2 shows a plan view sllowing a tray forming part oE the plant watering device oE Figure l;
Figure 3 shows an exploded view oE a water reservoir and water flow control unit :Eorming part oE the plant watering device oE Figure l;
Fi.yure 4 shows a view taken in hori70ntal cross-section through the unit oE Figure 3;
Figures SA, 5B and 5C show dia~r;llns representing parts oE the water flow control unit during successive periods of a cycle oE operation of the plant watering device oE Figure l;
Figure 6 8tlOWS a broken-away view of a part of a modiEication oE the water reservoir and water ~Elow control device in side elevation;
Flgure 7 shows a broken-away view taken in ; section along the line VII - VII of Figure 6;
Figure 8 shows a view taken in vertical cross-section through a broken-away portion oE a modiEication of the device oE Figure 1.
The plant watering device shown in Figure 1 comprises a tray, indicated generally by reference numeral 10 and a water reservoir and water flow control unit indicated gene:rally by reference numeral 12, with a plant pot indicated generally by reference numeral 14 standing in the tray 10.
As can be seen fro~ Figures 1 and 2, the tray 10 has a bottom 16, opposite side walls 18 and opposite end wal:Ls 20.
~2~237~
~ partition wall 22 mvlded in one piece with the tray bottoln 16 and the side walls 18 and extending upwardly from the tray bottom 16 to a level I,] forms a weir which divides the interior of tlle tray 16 into a first receptacle, which is on the :le~t-hand side o.E the partition wall 22 as ~iewed in Figure 2, and a seconcl receptacle~ which is on the right-hand side of the partition wall 22 as viewed in Figure 2.
It will be observed that the level Ll i.s substantially lower than the tops of the .side walls 18 and the end wa].l.s 20.
The water reservoir and water flow control unit 12l which for ~simplicity is reEerred to be.low a~s the water supply unit 12, has front and rear walls 24 and 26, 15 opposite side walls 28 and 30 and a top 32 which cooperate to define A Eirst air-tight chamber or space 36 above supply oE water contained within the water supp].y unit 12 and hav;.ng a sur.Eace level L2, above which the a:ir space 36 cont.ain.s nir at sub-atmospheric pres~qure.
The lower end of the water supply Utlit 30 is : provided with a bottom 38 which i8 formed with an outlet opening 40 through which the water can Elow from the interior of the water supply unit 12, as is described in greater detail below.
The water supply unit 12 is also provided with a hor.izontal partition wall 42, which extends to the front and eear walls 24 and 26 and the side wall 30, but is spaced from the side wall 28, and a vertical partition wall 44 which extends downwardly from the horizontal partit;on wall 42 to the bottom 38 and which also extends to the front and rear walls 24 and 26. The partition walls 42 and 44 define! with the walls and bottom of the water ~upply unit 12, a second air space, indicated by, reference numeral 46, which communicates with the 35~ atmo~phere through a rectangular opening 48 in the front wall 24 and through a corresponding rectangular opening (not shown) in the rear wall 26.
23~73 As can be seen from Figure 3, the horizontal partition wall 42 and the vertical partition wall 44, which like the other components o.E the water .supply unit 12 are made oE synthetic plastic materia]., are Eormed in one piece. The lower edge of the vertical partition wall is engageable in a slot 45 extendiny tran~,versely acros~
the bottom 38, the opposite ends of which are stepped to Eorm shouLders 47 enyageable witl~ the lower edge.s of the wal.ls 28 an(l 30 of the wa~er ~upply unit 12. ~he edges oE
1~ the horizontal and vertical partition walls 42 and 44 and oE the bottom 38 are sealingly secured to the walls 24, 26, 28 and 30 of the water supply unit l2, and the lower eclge oE the vertical partition wall 44 i~ likewise secured ;.n tlle slot 45 to the bottom 38, by an adhesive (not l.5 sllc)wn).
When the water supply unit 12 .st~nds on the bottom 16 oE the tray lO as sllown in Figure 1, the lower e(1ge oE the open:ing 48, which is indicated hy reEerence numeral 50 and which extends horizontalLy, is located at a level L3 which is higher than the level Ll, for the purpose to be descr,ibed below.
Within the water supply unit 12 there is provided a vertical tubular air passage 52 which has an open top located at a small distance below the top 32 of the water supply unit 12.
The tubular air passage 52 extends downwardly, through the horizontal partition wall 42 and into the air space 46, to a tubular lower end portion 54 having a downwardly-open lower end 56, the tubular portions 52 and 54 communicating with one another to form an alr passage e~tending from the lower end 56 of the tubular portion 54 to the upper end of the tubular portion 52.
The lower end 56 is located at a small spacing above the bottom 38 of the water supply unit 12 within the air space 46.
To facilitate installation o:E the tubular air passage 52 and the tubular lower end portion 54, the air pas.~age 52 is formed with upper and lower integral annuLar
A further prior art watering device is ahown in Urlited States Patent 267,296, which teaches a selE-irrigating flower pot or vase in which apertures allow water to pass -from a reservoir into a saucer and then into tt~e pot. Evaporation from the saucer and absorption oE
water in the pot cause the liquid level in the saucer to Eall below the apertures, which alLows further wate~ to ~low from the reservoir. Once again, thls prior device constantly waters the pot.
United States Patent 3,125,255, issued March 17, 1964 to B. Kaiser, shows the use o~ evaporation Erom an / auxiliary reservoir to control air Elow into a main reservoir and, thus, to control the outELow oE water Erom the main reservoir. More particularly, according to the teachings oE this prior device, evaporation from a so-called water receiver uncovers the lower end oE a tube, -to allow air to flow into a main container, which in turn allows water to Elow thereErom through an outlet.
While the device shown in the aEoresaid United 25 States Patent 3,125,255 efEects delayed watering oE a plant or tl~e like, by employing evaporation in a separate water chamber to delay the onset oE irrigation, as described above, it nevertheless simply allows a single flow of water ~Erorn the main container at a delayed period of time but in a continuous manner, and does not in any way enable an intermittent, i.e. repeated, watering action to be effected.
Furtller prior art watering devices are shown in United States Patents 3,438,575 4,060,93~ 4,085,546;
35 4,121,608; 4,241,538 and 4,542,762.
It is an object of the present invention to provide a novel and improved waterlng device which not only enables water to be supplied ater a predet:ermined 37~
delay, but also enables an intermittent supply of the water.
It is a fu~ther object of the present invention to enable a plant to be watered repeatedly, at successive time intervals.
It i8 a still further object oE the present invelltion to provide a watering device which delivers successive 10ws of water in dependence on the rate oE
evaporation of water from the device, so that in hot dry weather the device will dispense water more ~requently than during dampl cold conditions.
According to the present inventi~n, there is provided a watering device which has a reservoir defining a first air-tight space within an upper portion of the reservoir, a first water receptacle Eor receiving fLows oE
water Erom a water reservoir and a second water receptacle for receiving flows oE water Erom the first water receptacle.
A weir between the Eirst and second water receptacles retains the water at a Eirst predetermined level in the first receptacle to prevent unintended loss oE water Erom the reservoir.
For controlling the flow o water froln the water re.servoir to the water receptacles, there is provided a second air space which is ope~ to the atmosphere and an air passage having an open top end in the Eirst air space of the water reservoir and an open bottom end in the second air space.
l'he first receptacle communicates at a second predetermined level with the second air space, the second level being higher than the first predetermined level and, also, higher than the open bottom end of the air passage.
Consequently, when water is supplied from the water reservoir to flood the receptacles~ the open bottom end of the air passage thereaEter becomes ilnmersed, which prevents the further flow of water fro~ the water reservoir to the receptacles until evaporation o water from the second air space allows, once again, the entry of ~22~3 air through the air pas.sage into the Eir~st air space and~
thus, allows the flow of water from the water reservoir to Elood the fir.st and second receptacles.
The invention will be more readily apparent Erom the Eollowing description of embodimellts thereo.E given, by way of example, witll reference to the accompanying drawings, in which:-Figure 1 shows a view in side el.evation oE aplant watering device according to a preEerred embodiment, provided with a pot containing a plant Fiyure 2 shows a plan view sllowing a tray forming part oE the plant watering device oE Figure l;
Figure 3 shows an exploded view oE a water reservoir and water flow control unit :Eorming part oE the plant watering device oE Figure l;
Fi.yure 4 shows a view taken in hori70ntal cross-section through the unit oE Figure 3;
Figures SA, 5B and 5C show dia~r;llns representing parts oE the water flow control unit during successive periods of a cycle oE operation of the plant watering device oE Figure l;
Figure 6 8tlOWS a broken-away view of a part of a modiEication oE the water reservoir and water ~Elow control device in side elevation;
Flgure 7 shows a broken-away view taken in ; section along the line VII - VII of Figure 6;
Figure 8 shows a view taken in vertical cross-section through a broken-away portion oE a modiEication of the device oE Figure 1.
The plant watering device shown in Figure 1 comprises a tray, indicated generally by reference numeral 10 and a water reservoir and water flow control unit indicated gene:rally by reference numeral 12, with a plant pot indicated generally by reference numeral 14 standing in the tray 10.
As can be seen fro~ Figures 1 and 2, the tray 10 has a bottom 16, opposite side walls 18 and opposite end wal:Ls 20.
~2~237~
~ partition wall 22 mvlded in one piece with the tray bottoln 16 and the side walls 18 and extending upwardly from the tray bottom 16 to a level I,] forms a weir which divides the interior of tlle tray 16 into a first receptacle, which is on the :le~t-hand side o.E the partition wall 22 as ~iewed in Figure 2, and a seconcl receptacle~ which is on the right-hand side of the partition wall 22 as viewed in Figure 2.
It will be observed that the level Ll i.s substantially lower than the tops of the .side walls 18 and the end wa].l.s 20.
The water reservoir and water flow control unit 12l which for ~simplicity is reEerred to be.low a~s the water supply unit 12, has front and rear walls 24 and 26, 15 opposite side walls 28 and 30 and a top 32 which cooperate to define A Eirst air-tight chamber or space 36 above supply oE water contained within the water supp].y unit 12 and hav;.ng a sur.Eace level L2, above which the a:ir space 36 cont.ain.s nir at sub-atmospheric pres~qure.
The lower end of the water supply Utlit 30 is : provided with a bottom 38 which i8 formed with an outlet opening 40 through which the water can Elow from the interior of the water supply unit 12, as is described in greater detail below.
The water supply unit 12 is also provided with a hor.izontal partition wall 42, which extends to the front and eear walls 24 and 26 and the side wall 30, but is spaced from the side wall 28, and a vertical partition wall 44 which extends downwardly from the horizontal partit;on wall 42 to the bottom 38 and which also extends to the front and rear walls 24 and 26. The partition walls 42 and 44 define! with the walls and bottom of the water ~upply unit 12, a second air space, indicated by, reference numeral 46, which communicates with the 35~ atmo~phere through a rectangular opening 48 in the front wall 24 and through a corresponding rectangular opening (not shown) in the rear wall 26.
23~73 As can be seen from Figure 3, the horizontal partition wall 42 and the vertical partition wall 44, which like the other components o.E the water .supply unit 12 are made oE synthetic plastic materia]., are Eormed in one piece. The lower edge of the vertical partition wall is engageable in a slot 45 extendiny tran~,versely acros~
the bottom 38, the opposite ends of which are stepped to Eorm shouLders 47 enyageable witl~ the lower edge.s of the wal.ls 28 an(l 30 of the wa~er ~upply unit 12. ~he edges oE
1~ the horizontal and vertical partition walls 42 and 44 and oE the bottom 38 are sealingly secured to the walls 24, 26, 28 and 30 of the water supply unit l2, and the lower eclge oE the vertical partition wall 44 i~ likewise secured ;.n tlle slot 45 to the bottom 38, by an adhesive (not l.5 sllc)wn).
When the water supply unit 12 .st~nds on the bottom 16 oE the tray lO as sllown in Figure 1, the lower e(1ge oE the open:ing 48, which is indicated hy reEerence numeral 50 and which extends horizontalLy, is located at a level L3 which is higher than the level Ll, for the purpose to be descr,ibed below.
Within the water supply unit 12 there is provided a vertical tubular air passage 52 which has an open top located at a small distance below the top 32 of the water supply unit 12.
The tubular air passage 52 extends downwardly, through the horizontal partition wall 42 and into the air space 46, to a tubular lower end portion 54 having a downwardly-open lower end 56, the tubular portions 52 and 54 communicating with one another to form an alr passage e~tending from the lower end 56 of the tubular portion 54 to the upper end of the tubular portion 52.
The lower end 56 is located at a small spacing above the bottom 38 of the water supply unit 12 within the air space 46.
To facilitate installation o:E the tubular air passage 52 and the tubular lower end portion 54, the air pas.~age 52 is formed with upper and lower integral annuLar
3~
flanges 53 and 55. On assembly of the components of the water .supply unit 12, the tubular air passage 52 is inserted upwardly through a circular opening 57 in the hori~ontal partition wall Q2 and -the upper flange 53 is secured to the underside oE the hori~olltal partition waLL
42 by an adhesive, which seals the upper .EI.ange 53 to the horizontal partition wall 42 around the opening 57 and thu.s, seals the opening 57.
The lower Elange 55 fi.ts .into, and is sealed by adhesi.ve to, the top of tlle tubular lower end portion 54.
To refill the water supply unit 12, the unit i9 b.rought to a 5 ink, inverted and :Ei.lled with water through the opening 40.
~ ]ternatively, an inlet opening (not shown) provided wi.th an appropriate air-tiyht and water-tight cl.osure mem~er, e.g. a screw cap, ~not shown) may be provided in the top 32 Eor supplyiny the water to the interior oE the water suppl.y unit 12.
Tlle un:it lZ is then returned to its tray 10 by holding a Einger over the opening 40 to prevent the outElow oE water while the unit is restored to tlle upright for non-inverted position in whlch it is shown in the drawings, the finger being removed as the unit 12 is ` lowered onto the tray 10.
In operation, with the water supply unit 12 thus filled with water and standing in the tray 10 as shown in Figure lr air froln the atmosphere can enter the air space 46 through the opening 48 and, hence, can enter the air passage comprising the tubular portions 52 and 54 through the open lower end 56 oE the latter, so that this a;r can flow into the air space 36.
This entry of air into the air space 36 al.lows some water to flow out from the water supply unit 12, through the outlet opening 40, into the first receptacle, formed by the left-hand portion of the tray 10 (see F'igure 2) as described above~
The water can flow out through the opening 40 because the opening 40 is not sealed to the bottom 16 of 3~3 the tray l0~ IE requlred, the underside oE the un.it 12 and/or the upper surface oE the tray bottom 16, may be formed with projections or otherwise shaped to raise the opening 40 Erom the tray bottom 16 so as to prevent any pc)ssibility of sealing of the opening 40 by the tray bottom 16.
The water level in the tray 1() rises until this water can Elow over the top of the partition wall 22 into the second receptacle and subsequently over the horizontal 10 edge 50 of tlle opening 4~ into the air space 46.
Tlle water which thus flows into the second receptacle wets the bottom oE the pot 14 ancl, thu.s, serves to irrigate a plant in the pot 14.
l`he water which :Elows over the opening edge 50 into the air space 46, and which o.E cour~e Ealls to the bottom oE the air .space 46, rises to the level of tlle l.ower end 56 oE the tubular air passage port.ion 54 and, tllus, cl.o~es the air pa~ssage and prevent.s the entry of Eurther clir through the air passage into the a;.r space 36.
Tilis closure o.E the air passage interrupts the outElow of water from the air water supply unit 12 through the outlet opening 40 while the lower end 56 of the air passage remairls closed by the water in the air space 46.
Over a period oE time, the water above the level L,l, and, subse~uently, the water remaining in the second receptacle is consumed by the plant in the pot 14 and by evaporation.
.~ventually, the water within the air space 46 also evaporates, at a rate which is determined by the siæe of the opening 48 and the correspond.ing opening in the rear wall 26 and by the dryness oE the ambient atmosphere, to a suE~icient extent to allow air to enter the lower end 56 oE the air passage, and thus to allow a furtller outElow o.E water from the air supply unit 12.
In this connection, reference is made to Figures 5A through 5C ~or a more detailed illustration of the variations of the water level within the air space 46.
3~3 g As shown in Figure 5A, the surface of the water has Eallen, by evaporation, to a level 1,4, so that the water, by surface tension, forms a neck 60 at the lower end 56 of the air passage.
After a slight additional amount oE evaporation oE the water Erom the air space 46, the water level falLs .5l ight.l.y further, and the neck 60 is thereby broken. A
small amount oE water then :Ealls from the tube 54 through the lower end 56, thereby evacuating the tube 54, and the sur~ace of the water in the air space A6 assumes a level L5 which is slightly higher than the level L4, shown in Figure 5B.
The water remaining in the tube 52 i.s displaced upwardl.y through the upper end o~ the tube 52 and the air passage is now open to the atmosphere, so that the air can flow into the air space 36, as described above, to allow a consequential outElow oE water Erom the water supply unit 12 throuyll the opening 40O
Whell the water then Elows into the air space 46 over the lower edge 50 of the opening 48, the water level at the tube 54 rises as a result of surface tensioll in the water to a level L6, as shown in Figure 5C, wt~ich is slightly above the level L3 of the weir formed by the opening lower edge 50. The above-de~scribed cycle is then repeated by evaporation oE the water ~Erom -the air space 46.
Thus, the above-described walering device does not merely flood the second receptacle and thereby irrigate the plant after the elapse oE a period of time, but does so repeatedly, so that the plant is intermittently watered at successive intervals of time.
The use of the small diameter tube 52 in conjunction with the large diameter tube 54 has the advantaye that the large diameter of the tube 54 ensures that water drops from the tube, as described above, when the neck 60 is broken, thus ensuriny that the water remaining in the tube 52 is pu.shed upwardl.y by atmospheric pressure from the tube 52. If the tube 54 were oE small 2;~37;~3 diameter, water might be retained in the tube 54 hy surEace tension, thus preventing the inElow oE air into the air space 360 Also, if the tube 52 were of large diameter~ suEficient water could drop from the tube 54 on breakage of tlle neck 60 to cau~e premature reclosure oE
the lower end 56 of tlle tube 54 by tlle water in the air space 46, thus preventing t:he above-described flooding o.
the receptacles through the open;ng 40.
~190, the ~small diameter of the tube 52 ensures that only a .small amount oE water is expe]led from the air space 46 into the tube 54 in response to any increases in the ambient atmospheric pressure, whlch amount is insuEficient to signi'icantly aEfect the cycle of operatlon oE the apparatus.
~E water is driven by atmospheric pressure from tlle air space 46 into the tubes 52 and 54 and Erom the Eirst receptacle into tlle air space 36, or iE the water becomes completely evaporatecl Eroln the Eirst receptacle, a bubbLe oE air will enter the unit 12 through tlle opening 40, and thus allow a small outElow oE water through the opening 40 but without initiating the Elooding of the second receptacle.
During the operation oE the device, the weir or partition wall 22 serves to retain water in the first receptacle, at the bottom of the unit 12, so as to prevent tlle escape oE water from the unit 12.
IE the weir 22 were absent, water would be constantly drawn from the tray into the plant pot, so that the plant would be watered contlnuously instead oE
intermittently.
Irtle above described w~ter supply unit 12 may be modi~ied, as illustrated in Figure 6 and 7, to enable the rate of evaporation of water from the air space 46, and thus the intervals oE time between successive flows oE
water into the second receptacle, to be varied.
More particularly, as shown ln Figures 6 and 7, the Eront wall 24 of the water supply unit 12 may be provided with a shutter or closure member 64 which ls slideably adjustable in a vertical direction, in front of the opening 48, for varying the amount oE the opening 48 wh.ich is open to the atmosphere.
The closure member 64 is adjustably .supported by a pair oE elongate projections 66 and 68 on the front surEace of the Eront wall 24.
The projection 66 is forme(l with an i.nclined side surEace 67 for sllding engagernent with a complimentary inclined edge oE the closure member 6A and, thus, allows sliding movement in a vertical direction of the closure m~mber 64 whi.l.e retaining the closure member 64 from displacemellt away from the outer surface oE the front waLI 24.
The ].ongitudinal projection 68 is formed with a serrated or saw-toothed side surEace 69 which i5 resiLientl.y engaged by a pair of detent members 70 on spring ~rms 71 formed in one piece with the closure member 64, which i9 made oE .synthetic plastic material. The resili.ence of the spring arms 71 both retains tlle clos~re member 64 in engagement with the projection 66 and 68 and, also, allows the closure member 64 to be adjusted vertical.ly in position for the purpose mentioned above~
: As indicated above, the water supply unit 12 is replenished through the opening 40, and is inverted for this purpose, as finger being held over the opening 40 to prevent the egress of water :Erom the water supply unit 12 which it is being restored to its non-inverted condi-tion and replaced on the tray 10.
To facilitate the replenishment of the water supply unit 12, the opening 40 may be provided with a flap valve as ind.icated generally by reference numeral 74 in Figure 8.
The flap valve 74 co~prises ~ spherical weight in the form of a ball 76 of glass, metal or other material, which is embedded in one end oE a resilient Elap 78 made oE soft, readily flexible synthetic plastic material. The opposite end of the Elap 78 is secured by adhesive 80 to the interior or upper surface oE the water 3~73 - ~.2 suppl.y unit bottom 38, in the space between the vertical partition wall 44 and the .sidewall 28 oE the water supply unit 12.
The flap 78 is positioned so th~t tlle ball 76 i5 located over the opening 40 and, when the water supply unit 12 i9 in its non~inverted position but not resting on the tray 10 or any other suppo:rt surEace, causes the flap 78 to be pressed downwardly onto the maryin oE the opening 40 and, thus, seals the openiny 40 in a water-tight 10 manner.
The flap 78 is Eormed with an integral depending cylindrical projection 82l which extends downwardly froln the Elap 78 to project beyond the underside oE the bottom 3~.
Consequently, when the wate~ supply unit l2 has been replerlished, in an inverted position, through the o~ening 40, and is then restored to i.ts noll-inverted position, the Elap val.ve 74 .is closed, a.s descr.ibed above, to thereby close tlle opening 40 and thererore to prevent the egress oE water through the opening 40 l~owever the thus-repleni.shed water .supply unit is again deposited in ;ts position on the tray 10, the downwardly protruding projection 82 is pressed upwardly, relative to the bottom 38 and the opening 40, by contact oE the projection with the upper surEace of the tray bottom 16.
The flap valve 74 is thereby opened to allow the outflow of water ~from the water supply unit 12 into the tray 10 in the above-described manner.
Thus, the flap valve 74 keeps the opening 40 closed until the water supply unit 12 has been restored to its normal position of use or, of course, until the water supply unit 12 is deposited in a non-inverted condition on any support surface.
Instead of the proj~ction 82 :Eormed on the flap 78, an upwardly extending projection could be provided on the tray 10 so as to extend upwardly throuyh the opening 40 and thereby open the Elap valve 74 as the water supply unit i~s deposited on the tray.
Wllen the water supply unit 12 is refiL]ed in its inverted position, the small gap between the tube 52 and the top 32 oE the water supply unit 12 is EiLIed with water. ~pOIl subse~uent restoration oE the water supply unit 12 to its upright or non~inverted conaition, the water supply unit 12 can be held sllspended Eor a short period oE time to allow water to drain downwardly throuyh the tubes 52 and 54, and the Elap valve 74 allows small bubbles oE air to enter the hole 40 and to percolate upwardly through the water to the space 36. The amount oE
water which thus escapes into the space 46 determines the water level in the space 46 immediately after tlle water supply unit 12 has been deposited onto the tray and thus, determines whether the unit i.s EulLy stalled (corresponding to Figure 5C) or partly stal~ed, (i.e. with the tube Iower end 56 closed but witll the water leveL
below level r6) or whether the tray l0 ls replenished as described above Erom tlle water supply unit 12 as the latter is deposited on the former.
In a still further embodiment oE the invention, ; the above-described apparatus is modiEied by the addition of a suitable support, e.g~ in the form of a slab-shaped body of plastic material, which may be inserted between the underside oE either the water supply unit l2 or the plant pot 14 and the tray bottom 16.
When the support is inserted beneath the plant pot 14, the volume oE water which reaches the plant pot 14 is during each wateriny cycle of operation oE the device correspondingly reduced. On the other hand, when the support is inserted beneath the water supply unit 12, the amount oE water received by the plant at each watering is increased.
It will be apparent that such a support may be provided in any of numerous different Eorms ~nd that the amount oE elevation of the plant pot or the water supply Utlit WhiCIl iS achieved by utilization oE the support is ~ ~223 ~3 suitably .se.l.ected in accordance with the dimensions oE the apparatus to produce the desired amount of watering of the plant.
It will also be readily apparent to those .skilled in the art that various modifications may be made in the above-described embodiments of the invention arld, accordingly, the scope of the present inventiorl is not restricted to the features of the water:ing device i1lustrated in the drawings and described above but may be varied within the spirit and scope oE the accompanying cl.a;ms, ~0 ; 25
flanges 53 and 55. On assembly of the components of the water .supply unit 12, the tubular air passage 52 is inserted upwardly through a circular opening 57 in the hori~ontal partition wall Q2 and -the upper flange 53 is secured to the underside oE the hori~olltal partition waLL
42 by an adhesive, which seals the upper .EI.ange 53 to the horizontal partition wall 42 around the opening 57 and thu.s, seals the opening 57.
The lower Elange 55 fi.ts .into, and is sealed by adhesi.ve to, the top of tlle tubular lower end portion 54.
To refill the water supply unit 12, the unit i9 b.rought to a 5 ink, inverted and :Ei.lled with water through the opening 40.
~ ]ternatively, an inlet opening (not shown) provided wi.th an appropriate air-tiyht and water-tight cl.osure mem~er, e.g. a screw cap, ~not shown) may be provided in the top 32 Eor supplyiny the water to the interior oE the water suppl.y unit 12.
Tlle un:it lZ is then returned to its tray 10 by holding a Einger over the opening 40 to prevent the outElow oE water while the unit is restored to tlle upright for non-inverted position in whlch it is shown in the drawings, the finger being removed as the unit 12 is ` lowered onto the tray 10.
In operation, with the water supply unit 12 thus filled with water and standing in the tray 10 as shown in Figure lr air froln the atmosphere can enter the air space 46 through the opening 48 and, hence, can enter the air passage comprising the tubular portions 52 and 54 through the open lower end 56 oE the latter, so that this a;r can flow into the air space 36.
This entry of air into the air space 36 al.lows some water to flow out from the water supply unit 12, through the outlet opening 40, into the first receptacle, formed by the left-hand portion of the tray 10 (see F'igure 2) as described above~
The water can flow out through the opening 40 because the opening 40 is not sealed to the bottom 16 of 3~3 the tray l0~ IE requlred, the underside oE the un.it 12 and/or the upper surface oE the tray bottom 16, may be formed with projections or otherwise shaped to raise the opening 40 Erom the tray bottom 16 so as to prevent any pc)ssibility of sealing of the opening 40 by the tray bottom 16.
The water level in the tray 1() rises until this water can Elow over the top of the partition wall 22 into the second receptacle and subsequently over the horizontal 10 edge 50 of tlle opening 4~ into the air space 46.
Tlle water which thus flows into the second receptacle wets the bottom oE the pot 14 ancl, thu.s, serves to irrigate a plant in the pot 14.
l`he water which :Elows over the opening edge 50 into the air space 46, and which o.E cour~e Ealls to the bottom oE the air .space 46, rises to the level of tlle l.ower end 56 oE the tubular air passage port.ion 54 and, tllus, cl.o~es the air pa~ssage and prevent.s the entry of Eurther clir through the air passage into the a;.r space 36.
Tilis closure o.E the air passage interrupts the outElow of water from the air water supply unit 12 through the outlet opening 40 while the lower end 56 of the air passage remairls closed by the water in the air space 46.
Over a period oE time, the water above the level L,l, and, subse~uently, the water remaining in the second receptacle is consumed by the plant in the pot 14 and by evaporation.
.~ventually, the water within the air space 46 also evaporates, at a rate which is determined by the siæe of the opening 48 and the correspond.ing opening in the rear wall 26 and by the dryness oE the ambient atmosphere, to a suE~icient extent to allow air to enter the lower end 56 oE the air passage, and thus to allow a furtller outElow o.E water from the air supply unit 12.
In this connection, reference is made to Figures 5A through 5C ~or a more detailed illustration of the variations of the water level within the air space 46.
3~3 g As shown in Figure 5A, the surface of the water has Eallen, by evaporation, to a level 1,4, so that the water, by surface tension, forms a neck 60 at the lower end 56 of the air passage.
After a slight additional amount oE evaporation oE the water Erom the air space 46, the water level falLs .5l ight.l.y further, and the neck 60 is thereby broken. A
small amount oE water then :Ealls from the tube 54 through the lower end 56, thereby evacuating the tube 54, and the sur~ace of the water in the air space A6 assumes a level L5 which is slightly higher than the level L4, shown in Figure 5B.
The water remaining in the tube 52 i.s displaced upwardl.y through the upper end o~ the tube 52 and the air passage is now open to the atmosphere, so that the air can flow into the air space 36, as described above, to allow a consequential outElow oE water Erom the water supply unit 12 throuyll the opening 40O
Whell the water then Elows into the air space 46 over the lower edge 50 of the opening 48, the water level at the tube 54 rises as a result of surface tensioll in the water to a level L6, as shown in Figure 5C, wt~ich is slightly above the level L3 of the weir formed by the opening lower edge 50. The above-de~scribed cycle is then repeated by evaporation oE the water ~Erom -the air space 46.
Thus, the above-described walering device does not merely flood the second receptacle and thereby irrigate the plant after the elapse oE a period of time, but does so repeatedly, so that the plant is intermittently watered at successive intervals of time.
The use of the small diameter tube 52 in conjunction with the large diameter tube 54 has the advantaye that the large diameter of the tube 54 ensures that water drops from the tube, as described above, when the neck 60 is broken, thus ensuriny that the water remaining in the tube 52 is pu.shed upwardl.y by atmospheric pressure from the tube 52. If the tube 54 were oE small 2;~37;~3 diameter, water might be retained in the tube 54 hy surEace tension, thus preventing the inElow oE air into the air space 360 Also, if the tube 52 were of large diameter~ suEficient water could drop from the tube 54 on breakage of tlle neck 60 to cau~e premature reclosure oE
the lower end 56 of tlle tube 54 by tlle water in the air space 46, thus preventing t:he above-described flooding o.
the receptacles through the open;ng 40.
~190, the ~small diameter of the tube 52 ensures that only a .small amount oE water is expe]led from the air space 46 into the tube 54 in response to any increases in the ambient atmospheric pressure, whlch amount is insuEficient to signi'icantly aEfect the cycle of operatlon oE the apparatus.
~E water is driven by atmospheric pressure from tlle air space 46 into the tubes 52 and 54 and Erom the Eirst receptacle into tlle air space 36, or iE the water becomes completely evaporatecl Eroln the Eirst receptacle, a bubbLe oE air will enter the unit 12 through tlle opening 40, and thus allow a small outElow oE water through the opening 40 but without initiating the Elooding of the second receptacle.
During the operation oE the device, the weir or partition wall 22 serves to retain water in the first receptacle, at the bottom of the unit 12, so as to prevent tlle escape oE water from the unit 12.
IE the weir 22 were absent, water would be constantly drawn from the tray into the plant pot, so that the plant would be watered contlnuously instead oE
intermittently.
Irtle above described w~ter supply unit 12 may be modi~ied, as illustrated in Figure 6 and 7, to enable the rate of evaporation of water from the air space 46, and thus the intervals oE time between successive flows oE
water into the second receptacle, to be varied.
More particularly, as shown ln Figures 6 and 7, the Eront wall 24 of the water supply unit 12 may be provided with a shutter or closure member 64 which ls slideably adjustable in a vertical direction, in front of the opening 48, for varying the amount oE the opening 48 wh.ich is open to the atmosphere.
The closure member 64 is adjustably .supported by a pair oE elongate projections 66 and 68 on the front surEace of the Eront wall 24.
The projection 66 is forme(l with an i.nclined side surEace 67 for sllding engagernent with a complimentary inclined edge oE the closure member 6A and, thus, allows sliding movement in a vertical direction of the closure m~mber 64 whi.l.e retaining the closure member 64 from displacemellt away from the outer surface oE the front waLI 24.
The ].ongitudinal projection 68 is formed with a serrated or saw-toothed side surEace 69 which i5 resiLientl.y engaged by a pair of detent members 70 on spring ~rms 71 formed in one piece with the closure member 64, which i9 made oE .synthetic plastic material. The resili.ence of the spring arms 71 both retains tlle clos~re member 64 in engagement with the projection 66 and 68 and, also, allows the closure member 64 to be adjusted vertical.ly in position for the purpose mentioned above~
: As indicated above, the water supply unit 12 is replenished through the opening 40, and is inverted for this purpose, as finger being held over the opening 40 to prevent the egress of water :Erom the water supply unit 12 which it is being restored to its non-inverted condi-tion and replaced on the tray 10.
To facilitate the replenishment of the water supply unit 12, the opening 40 may be provided with a flap valve as ind.icated generally by reference numeral 74 in Figure 8.
The flap valve 74 co~prises ~ spherical weight in the form of a ball 76 of glass, metal or other material, which is embedded in one end oE a resilient Elap 78 made oE soft, readily flexible synthetic plastic material. The opposite end of the Elap 78 is secured by adhesive 80 to the interior or upper surface oE the water 3~73 - ~.2 suppl.y unit bottom 38, in the space between the vertical partition wall 44 and the .sidewall 28 oE the water supply unit 12.
The flap 78 is positioned so th~t tlle ball 76 i5 located over the opening 40 and, when the water supply unit 12 i9 in its non~inverted position but not resting on the tray 10 or any other suppo:rt surEace, causes the flap 78 to be pressed downwardly onto the maryin oE the opening 40 and, thus, seals the openiny 40 in a water-tight 10 manner.
The flap 78 is Eormed with an integral depending cylindrical projection 82l which extends downwardly froln the Elap 78 to project beyond the underside oE the bottom 3~.
Consequently, when the wate~ supply unit l2 has been replerlished, in an inverted position, through the o~ening 40, and is then restored to i.ts noll-inverted position, the Elap val.ve 74 .is closed, a.s descr.ibed above, to thereby close tlle opening 40 and thererore to prevent the egress oE water through the opening 40 l~owever the thus-repleni.shed water .supply unit is again deposited in ;ts position on the tray 10, the downwardly protruding projection 82 is pressed upwardly, relative to the bottom 38 and the opening 40, by contact oE the projection with the upper surEace of the tray bottom 16.
The flap valve 74 is thereby opened to allow the outflow of water ~from the water supply unit 12 into the tray 10 in the above-described manner.
Thus, the flap valve 74 keeps the opening 40 closed until the water supply unit 12 has been restored to its normal position of use or, of course, until the water supply unit 12 is deposited in a non-inverted condition on any support surface.
Instead of the proj~ction 82 :Eormed on the flap 78, an upwardly extending projection could be provided on the tray 10 so as to extend upwardly throuyh the opening 40 and thereby open the Elap valve 74 as the water supply unit i~s deposited on the tray.
Wllen the water supply unit 12 is refiL]ed in its inverted position, the small gap between the tube 52 and the top 32 oE the water supply unit 12 is EiLIed with water. ~pOIl subse~uent restoration oE the water supply unit 12 to its upright or non~inverted conaition, the water supply unit 12 can be held sllspended Eor a short period oE time to allow water to drain downwardly throuyh the tubes 52 and 54, and the Elap valve 74 allows small bubbles oE air to enter the hole 40 and to percolate upwardly through the water to the space 36. The amount oE
water which thus escapes into the space 46 determines the water level in the space 46 immediately after tlle water supply unit 12 has been deposited onto the tray and thus, determines whether the unit i.s EulLy stalled (corresponding to Figure 5C) or partly stal~ed, (i.e. with the tube Iower end 56 closed but witll the water leveL
below level r6) or whether the tray l0 ls replenished as described above Erom tlle water supply unit 12 as the latter is deposited on the former.
In a still further embodiment oE the invention, ; the above-described apparatus is modiEied by the addition of a suitable support, e.g~ in the form of a slab-shaped body of plastic material, which may be inserted between the underside oE either the water supply unit l2 or the plant pot 14 and the tray bottom 16.
When the support is inserted beneath the plant pot 14, the volume oE water which reaches the plant pot 14 is during each wateriny cycle of operation oE the device correspondingly reduced. On the other hand, when the support is inserted beneath the water supply unit 12, the amount oE water received by the plant at each watering is increased.
It will be apparent that such a support may be provided in any of numerous different Eorms ~nd that the amount oE elevation of the plant pot or the water supply Utlit WhiCIl iS achieved by utilization oE the support is ~ ~223 ~3 suitably .se.l.ected in accordance with the dimensions oE the apparatus to produce the desired amount of watering of the plant.
It will also be readily apparent to those .skilled in the art that various modifications may be made in the above-described embodiments of the invention arld, accordingly, the scope of the present inventiorl is not restricted to the features of the water:ing device i1lustrated in the drawings and described above but may be varied within the spirit and scope oE the accompanying cl.a;ms, ~0 ; 25
Claims (7)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A repeatedly operating watering device, comprising:
a water reservoir;
said water reservoir defining a first air-tight space within an upper portion of said reservoir;
means defining an outlet at the bottom of said water reservoir for the outflow of water from said water reservoir;
a first water receptacle for receiving flows of water from said water reservoir; and means for controlling the flows of water from said water reservoir through said outlet to said first water receptacle;
said water flow controlling means comprising:
means defining a second air space;
means providing communication between said second air space and the atmosphere;
means deveining an air passage having a top end in said first air-tight space and a bottom end in said second air space; and means providing communication between said first water receptacle and said second air space at a predetermined level, whereby said passage bottom end is immersed to prevent flow of the water from said water reservoir to said first water receptacle until evaporation of water from said second air space allows the entry of air through said air passage to said first air space and, thus, a flow of water from said water reservoir to said first water receptacle;
a second receptacle for receiving water from said first receptacle; and weir means between said first and second receptacles for allowing filling of said second receptacle with water from said first receptacle, said weir means retaining water in said first receptacle to prevent the entry of air through said opening during consumption of the water in said second receptacle.
a water reservoir;
said water reservoir defining a first air-tight space within an upper portion of said reservoir;
means defining an outlet at the bottom of said water reservoir for the outflow of water from said water reservoir;
a first water receptacle for receiving flows of water from said water reservoir; and means for controlling the flows of water from said water reservoir through said outlet to said first water receptacle;
said water flow controlling means comprising:
means defining a second air space;
means providing communication between said second air space and the atmosphere;
means deveining an air passage having a top end in said first air-tight space and a bottom end in said second air space; and means providing communication between said first water receptacle and said second air space at a predetermined level, whereby said passage bottom end is immersed to prevent flow of the water from said water reservoir to said first water receptacle until evaporation of water from said second air space allows the entry of air through said air passage to said first air space and, thus, a flow of water from said water reservoir to said first water receptacle;
a second receptacle for receiving water from said first receptacle; and weir means between said first and second receptacles for allowing filling of said second receptacle with water from said first receptacle, said weir means retaining water in said first receptacle to prevent the entry of air through said opening during consumption of the water in said second receptacle.
2. A repeatedly operating watering device as claimed in Claim 1, wherein said means defining communication between said water receptacle and said air space comprise an opening through which the water in said air space can evaporate to the atmosphere.
3. A repeatedly operating watering device as claimed in Claim 2, further comprising means for adjustably varying the size of said opening to thereby vary the rate of evaporation of the water from said second air space and, thus, the time periods between successive water flows from said water reservoir to said first and second receptacles.
4. A repeatedly operating watering device as claimed in Claim 1, 2 or 3, wherein said first and second receptacles comprise first and second portions of an open-topped water container, and said weir means comprise a partition wall separating said first and second water container portions.
5. A repeatedly operating watering device as claimed in Claim 1, 2 or 3, wherein said water reservoir and said water flow controlling means are formed as a unit separate from said first and second receptacles.
6. A repeatedly operating watering device as claimed in Claim 1, 2 or 3, wherein said air passage comprises, a first tube extending downwardly from said open upper end and a second tube at the lower end of said first tube, said second tube forming said open lower end and having a diameter substantially greater than that of said first tube.
7. A repeatedly operating watering device as claimed in Claim 1, 2 or 3, further comprising valve means associated with said outlet for opening said outlet upon inversion of said water reservoir for refilling of said water reservoir and for closing said outlet upon restoration of said water reservoir to a non-inverted condition, said valve means including means for opening said valve means upon deposition of said water reservoir into an operative position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000508516A CA1222373A (en) | 1986-05-06 | 1986-05-06 | Plant watering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000508516A CA1222373A (en) | 1986-05-06 | 1986-05-06 | Plant watering device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1222373A true CA1222373A (en) | 1987-06-02 |
Family
ID=4133077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000508516A Expired CA1222373A (en) | 1986-05-06 | 1986-05-06 | Plant watering device |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1222373A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113647266A (en) * | 2019-11-28 | 2021-11-16 | 宋雨哲 | Sponge city is with green planting case of town road |
-
1986
- 1986-05-06 CA CA000508516A patent/CA1222373A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113647266A (en) * | 2019-11-28 | 2021-11-16 | 宋雨哲 | Sponge city is with green planting case of town road |
| CN113647266B (en) * | 2019-11-28 | 2022-08-23 | 新疆杰建建设工程有限公司 | Sponge city is with green planting case of town road |
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| MKEX | Expiry |