GB2147056A - Liquid proportioning devices - Google Patents
Liquid proportioning devices Download PDFInfo
- Publication number
- GB2147056A GB2147056A GB08325307A GB8325307A GB2147056A GB 2147056 A GB2147056 A GB 2147056A GB 08325307 A GB08325307 A GB 08325307A GB 8325307 A GB8325307 A GB 8325307A GB 2147056 A GB2147056 A GB 2147056A
- Authority
- GB
- United Kingdom
- Prior art keywords
- piston
- assemblies
- cylinder
- cylinders
- liquids
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B13/00—Pumps specially modified to deliver fixed or variable measured quantities
- F04B13/02—Pumps specially modified to deliver fixed or variable measured quantities of two or more fluids at the same time
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F11/00—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it
- G01F11/02—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers which expand or contract during measurement
- G01F11/04—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers which expand or contract during measurement of the free-piston type
- G01F11/06—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers which expand or contract during measurement of the free-piston type with provision for varying the stroke of the piston
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Accessories For Mixers (AREA)
Abstract
A device for mixing two liquids in accurately metered proportions comprises two identical aligned and opposed piston and cylinder assemblies P/C1 and P/C2 with pistons P1 and P2 sharing a common piston rod 2, and a pair of similar but smaller assemblies P/C3 and P/C4 with common piston rod 3. Inlet ports of the larger cylinders C1 and C2 are connected to a supply of one liquid, and those of smaller cylinders C3 and C4 to a supply of the other liquid. The outlet ports of all four cylinders deliver to a common main outlet pipe 25. A change-over valve V alternately connects the inner ends of the larger cylinders C1 and C2, in sequence, to a source of operating fluid and exhaust to provide free-running reciprocation. The pairs of assemblies are linked to provide synchronised reciprocation thereof, by a lever 30 joining piston rods 2 and 3. A movable fulcrum 33 provides relative adjustment of the stroke lengths of the two pairs of pistons P1,P2 and P3,P4. <IMAGE>
Description
SPECIFICATION
Liquid proportioning devices
This invention relates to devices for mixing liquids in accurately metered proportions. It provides such a device which can supply the liquid mixture under pressure, for example to a spray gun, and is of particular but by no means exclusive application to disinfectant supply apparatus for use in dairies.
In dairy management it is common practice to wash off the udders of cows in the milking parlour by spraying with disinfectant solution prior to fitting the teat cluster of a vacuum milking machine. A mixture of iodine in water, for example, is often used supplied to a handheld spray gun and various forms of apparatus are in use for supplying such a spray gun under pressure with the disinfectant solution.
Such prior apparatus possesses a number of disadvantages; in particular a venturi or needle valve which tends to become clogged is usually employed, and it is normally electrically powered which can be hazard in the environment of a milking parlour.
An object of the invention is to provide a device for mixing liquids in metered proportions, and which can be used to supply the liquid mixture under pressure for example to a spray gun. A further object is to provide such a device which can be designed for powering by a vacuum, so as to be particularly suitable for use in a milking palour where electrical apparatus is undesirable and where a source of vacuum is already present for the operation of milking equipment.
According to the invention a device for mixing liquids in accurately metered proportions comprises at least two piston and cylinder assemblies with inlet and outlet valves, for connection respectively to a supply of liquid to be dispensed and to a mixing zone, means for reciprocating the piston of one of the assemblies and a variable ratio linkage interconnecting the assemblies for synchronised reciprocation thereof and adjustment of the stroke of the piston of the other assembly.
As will be appreciated any number of piston and cylinder assemblies can be employed dependent on the number of liquids to be mixed in metered proportions, but the invention will from hereon be more particularly described with reference to arrangements employing piston and cylinder assemblies for the mixing of two liquids.
In general one piston and cylinder assembly will be considerably smaller than the other, for example for mixing a small but accurately dispensed proportion of iodine solution to water delivered from the larger piston and cylinder assembly. In this case the mixing zone is preferably positioned at an outlet pipe into which the outlet valve of the smaller piston and cylinder assembly delivers, the upstream end of this outlet pipe being fed from the outlet valve of the larger piston and cylinder assembly. The linkage between the two pistons may comprise a lever interconnecting respective piston rods, which lever has an adjustable fulcrum point.
Each piston and cylinder assembly may be one of a pair of oppositely-acting assemblies to provide a double-acting arrangement for mixed-liquid delivery on each piston stroke, with the two pistons of each assembly pair mounted on a common piston rod. The space between the opposed assemblies may accommodate the variable ratio linkage between the two piston rods. The inner ends of the cylinders of said one assembly pair may comprise operating chambers alternately connectable to an operating vacuum or to atmosphere through a valve changed over as a result of piston rod movement. The operating source may be a vacuum line in a milking parlour.
Such an arrangement has the advantage that alternative hydraulic operation by fluid pressure applied to the outer ends of the cylinders is possible when a higher pressure output delivery of the mixed liquids is desired. This may be achieved by supplying the fluid being metered under pressure through the same change-over valve suitably reconnected.
Thus, for use in a milking parlour, the device can be vacuum operated when the mixed liquids are supplied to a spray gun for hand washing purposes, or pressure operated when cleaning by floor-mounted spray nozzles over which the cows walk to the milking stalls is a requirement.
The inlet and outlet valves of the piston and cylinder assemblies are conveniently one-way flap valves and, for each assembly, may comprise a concentric arrangement with a central outlet valve of "parrot beak" type and an annular inlet flap valve.
Instead of the aligned arrangement of piston and cylinder assemblies in a double-acting arrangement, the two larger assemblies may be positioned side by side with the two pistons having separate piston rods interconnected by a lever link pivoted at its midpoint.
The pair of the smaller piston and cylinder assemblies may then be positioned between the larger assemblies with a linkage connection to the smaller piston rods coupled to that lever link along which a connecting link connection is slidable to provide the adjustable metering proportion.
Although a paired double-acting arrangement is preferred, for delivery on each piston stroke, single-acting piston and cylinder assemblies may be employed with projecting piston rods coupled through the adjustable fulcrum linkage and provided with slide bearing supports.
The pistons may be sealed relative to the respective cylinders by rolling diaphragm type seals. This considerably simplifies and cheap ens production, as the cylinder bores and pistons do not have to be machined fit, and it ensures that there is no leakage past the pistons.
The invention will now be further described with reference to the accompanying drawings which illustrate, by way of example and somewhat schematically, a liquid proportioning device representing a preferred embodiment of the invention designed for alternative vacuum or pressure fluid operation. In the drawings:
Figure 1 is a plan view of the device;
Figure 2 is a side view thereof;
Figure 3 is an end view; and
Figure 4 is a detail view.
The device illustrated comprises a baseplate 1 on which are mounted two identical aligned and opposed large piston and cylinder assemblies P/C1 and P/C2 the pistons P1 and P2 of which share a common piston rod 1. A pair of similar but smaller piston and cylinder assemblies P/C3 and P/C4 are mounted on the baseplate parallel to the larger assemblies, with the pistons P3 and P4 thereof sharing a common piston rod 3. The cylinders C1 and
C3 of the assemblies P/C1 and P/C3 are supported at their inner ends by an upstanding lateral support plate 4 mounted on the baseplate 1, and at an intermediate position by an upstanding support plate clamped between flanges on split portions Cla and C1b of the cylinder C1, and C3a and C3b of the cylinder C3.At these split cylinder joints there are also clamped the peripheries of rolling diaphragm type seals 6 and 7 which seal the pistons relative to the respective cylinders.
The assemblies P/C2 and P/C4 are similarly supported by end and intermediate support plates 8 and 9, the cylinders C2 and C4 being split into flanged portions C2a and C2b, and C4a and C4b. Rolling diaphragm type seals 10 and 11 are similarly provided for the pistons P2 and P4.
Cylinder heads 12 and 1 3 are respectively clamped to the outer ends of the cylinders C1 and C2 by a ring of tie rods 14 and 1 5 which extend back, respectively, to the support plates 4 and 8. The cylinder heads have inlet and outlet ports controlled by concentric inlet and outlet one-way flap valves-in the head 1 2 an annular inlet flap valve 1 6 and a central parrot beak type flap valve 17, and in the head 1 3 identical two flap valves 1 8 and 1 9. The two smaller cylinders C3 and C4 have integral outer end cylinder heads with similar concentric inlet/outlet valve arrangements such as 20,21 shown for cylinder C3.
The illustrated construction, with opposed pairs of piston and cylinder assemblies, provides a double-acting arrangement. The inlet ports of the larger cylinders C1 and C2 are connected to induction pipes 22a and 22b from a supply of one liquid to be dispensed, and the inlet ports of the smaller cylinders C3 and C4 are similarly connected to induction pipes 22a, and 22b1 from a supply of the other liquid to be dispensed. In a dairly application, for which the device shown was specifically designed, the liquids will be water and a disinfectant solution, for example of iodine, which have to be mixed in accurately metered proportions.The outlet ports of the cylinders C1 and C2 are connected to the upstream ends of supply pipes 23a and 23b respectively, which lead to the outlet port zones of the cylinder heads of the smaller cylinders C3 and C4, from which further supply pipes 24a and 25b, respectively, feed a common main outlet pipe 25.
The inner ends of the larger cylinders C1 and C2 are closed by cylinder heads 27 and 28, providing closed chambers at the inner sides of the pistons P1 and P2. These chambers are connected to a change-over valve V which is operated through an over-centre spring arrangement S by a projection 29 on the piston rod 2. The valve V operates to connect alternately the inner ends of the cylinders C1 and C2, in sequence, to an operating vacuum source and to atmosphere, and the valve is changed over at the end of each piston stroke. Thus when the valve is connected to the vacuum source a free-running reciprocation of the assemblies P/C1 and
P/C2 results, with the liquid dispensed thereby flowing along the pipes 23.As this liquid passes the cylinders P3 and P4 the liquid dispensed therefrom is mixed with the first liquid flow, the liquid mixture being fed along the pipes 24 to the pipe 25 which supplies, for example, a hand-held spray gun.
A linkage between the assemblies P/C1,
P/C2 and the assemblies P/C3, P/C4, to provide synchronised operation thereof, comprises a lever link 30 slidable in pivot blocks 31 and 32 fixed centrally on the piston rods 2 and 3. At one end the lever 30 pivots in a fixed pivot structure 33 which is mounted on the baseplate 1 on a transverse axis A positioned centrally between the opposed assemblies P/C1 and P/C2, and P/C3 and P/C4.
The pivot structure 33 is adjustable along the axis A, its adjusted position determining the actual stroke of the pistons P3 and P4 whilst the pistons P1 and P2 always execute their full strokes. Thus the proportioning of the two liquids, in the mixture fed to the pipe 26, is infinitely adjustable over a considerable range.
To prevent the system locking up, with possible damage, if stroke adjustment is made in certain positions, the piston rod 3 is connected to the pistons P3 and P4 through compression springs 34 and 35, respectively.
These springs 34 and 35 are housed in guide tubes 36 and 37 which are rigidly fixed to the pistons P3 and P4 and in which the ends of the piston rod 3 are respectively received. The schematic end view of Fig. 3 shows, sectioned, a casing 38 which encloses the device and fits over the flanged base plate 1.
Claims (11)
1. A device for mixing liquids in accurately metered proportions comprising at least two piston and cylinder assemblies with inlet and outlet valves, for connection respectively to a supply of liquid to be dispensed and to a mixing zone, means for reciprocating the piston of one of the assemblies and a variable ratio linkage interconnecting the assemblies for synchronised reciprocation thereof and relative adjustment of the stroke of the piston of the other assembly.
2. A device according to claim 1, wherein the number of said piston and cylinder assemblies is chosen for the mixing of only two liquids and the or each of the assemblies for dispensing one of the liquids is considerably smaller in terms of volume delivery than the or each assembly for dispensing the other of the liquids.
3. A device according to claim 2, wherein said mixing zone is positioned at an outlet pipe into which the outlet valve of the (or each) smaller piston and cylinder assembly delivers, the upstream end of this outlet pipe being fed from an outlet valve of the (or each) larger piston and cylinder assembly.
4. A device according to any one of the preceding claims, wherein the linkage between the two pistons comprises a lever interconnecting respective piston rods, which lever has an adjustable fulcrum point.
5. A device according to any one of the preceding claims, wherein each piston and cylinder assembly is one of a pair of oppositely-acting assemblies to provide a doubleacting arrangement for mixed-liquid delivery on each piston stroke.
6. A device according to claim 5, wherein the two pistons of each assembly pair are mounted on a common piston rod.
7. A device according to claim 6, wherein the space between the opposed assemblies accommodates the variable ratio linkage between the two piston rods thereof.
8. A device according to claim 6 or 7, wherein the inner ends of the cylinders of said one assembly pair comprise operating chambers alternately connectable to an operating vacuum or to atmosphere through a valve which is changed over as a result of piston rod movement.
9. A device according to claim 5, wherein the two larger assemblies are positioned side by side and the two pistons thereof have separate piston rods interconnected by a lever link pivoted at its midpoint.
10. A device according to claim 9, wherein the pair of the smaller piston and cylinder assemblies are positioned between the larger assemblies with a linkage connection to the smaller piston rods coupled to that lever link along which a connecting link connection is slidable to provide the adjustable metering proportion.
11. A device according to claim 10, wherein for each piston and cylinder subassembly the inlet and outlet valves comprise a concentric arrangement with a central outlet valve of "parrot beak" type and an annular inlet flap valve.
1 2. A device according to any one of the preceding claims, wherein the pistons thereof are sealed relative to the respective cylinders by rolling diaphragm type seals.
1 5. An installation according to claim 16, wherein the arrangement is such that said alternative fluid pressure operation is achieved by supplying under pressure, through said change-over valve suitably reconnected, fluid being metered.
11. A device according to any one of claims 1 to 5, wherein single-acting piston and cylinder assemblies are employed with projecting piston rods coupled through the adjustable fulcrum linkage and provided with slide bearing supports.
1 2. A device according to any one of the preceding claims, wherein the inlet and outlet valves of the piston and cylinder assemblies are one-way flap valves.
1 3. A device according to claim 12, wherein for each assembly the inlet and outlet valves comprise a concentric arrangement with a central outlet valve of "parrot beak" type and an annular inlet flap valve.
14. A device according to any one of the preceding claims, wherein the pistons are sealed relative to the respective cylinders by rolling diaphragm type seals.
1 5. An installation embodying a device according to claim 8, wherein the operating source is a vacuum line in a milking palour.
1 6. An installation embodying a device according to claim 8, wherein alternative arrangements are made for alternative hydraulic operation by fluid pressure applied to the outer ends of the cylinders when a higher pressure output delivery of the mixed liquids is desired.
1 7. An installation according to claim 16, wherein the arrangement is such that said alternative fluid pressure operation is achieved by supplying the fluid being metered under pressure through said change-over valve suitably reconnected.
1 8. A device for mixing liquids substantially as hereinbefore particularly described with reference to and as illustrated in the accompanying drawings.
CLAIMS (4 Jan 1985)
1. A device for mixing liquids in accurately metered proportions comprising at least two piston and cylinder assemblies with inlet and outlet valves, for connection respectively to a supply of liquid to be dispensed and to a mixing zone, and a variable ratio linkage interconnecting the assemblies for synchronised reciprocation thereof and for relative adjustment of the piston strokes of the assemblies, each piston and cylinder assembly comprising a pair of oppositely-acting piston and cylinder sub-assemblies to provide a double-acting arrangement for mixed-liquid delivery on each piston stroke, with one pair of such subassemblies having cylinders corresponding ends of which comprise operating cylinders for valved operation of the device with the other ends of these cylinders having the corresponding inlet and outlet valves for metered delivery of one of said liquids.
2. A device according to claim 1, wherein the number of said piston and cylinder assemblies is chosen for the mixing of only two liquids and the (or each) of the assemblies for dispensing one of the liquids is considerably smaller in terms of volume delivery than the or each assembly for dispensing the other of the liquids.
3. A device according to claim 2, wherein said outlet valve of the (or each) smaller piston and cylinder sub-assembly delivers into an outlet pipe the upstream end of which is fed from an outlet valve of the (or each) corresponding larger piston and cylinder subassembly.
4. A device according to any one of the preceding claims, wherein the linkage between the piston and cylinder assemblies comprises a lever interconnecting respective piston rods, which lever has an adjustable fulcrum point.
5. A device according to any one of the preceding claims, wherein the two pistons of each sub-assembly pair are mounted on a common piston rod.
6. A device according to clam 5, wherein the space between the opposed sub-assemblies of each pair thereof accommodates the variable ratio linkage between the piston rods thereof.
7. A device according to claim 5 or 6, wherein the inner ends of the cylinders of said one sub-assembly pair provide said operating chambers which are alternately connectable to an operating vacuum or to atmosphere through a valve which is changed over as a result of piston rod movement.
8. A device according to any one of claims 1 to 4, wherein the piston and cylinder sub-assemblies of said one pair thereof are positioned side by side and the two pistons thereof have separate piston rods interconnected by a lever link pivoted at its midpoint.
9. A device according to claim 8, wherein a smaller pair of the piston and cylinder subassemblies are positioned between the subassemblies of said one pair thereof with a linkage connection to the smaller piston rods coupled to said lever link along which a connecting link connection is slidable to provide the adjustable metering proportion.
10. A device according to any one of the preceding claims, wherein said inlet and outlet valves are one-way flap valves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08325307A GB2147056B (en) | 1983-09-21 | 1983-09-21 | Liquid proportioning devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08325307A GB2147056B (en) | 1983-09-21 | 1983-09-21 | Liquid proportioning devices |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8325307D0 GB8325307D0 (en) | 1983-10-26 |
| GB2147056A true GB2147056A (en) | 1985-05-01 |
| GB2147056B GB2147056B (en) | 1986-11-12 |
Family
ID=10549106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08325307A Expired GB2147056B (en) | 1983-09-21 | 1983-09-21 | Liquid proportioning devices |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2147056B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0226070A2 (en) * | 1985-12-13 | 1987-06-24 | Böllhoff Verfahrenstechnik GmbH & Co. KG | Pump arrangement for delivering measured quantities of at least two components |
| GB2222208A (en) * | 1988-05-13 | 1990-02-28 | Apex Fuels Ltd | Pumping apparatus |
| GB2242368A (en) * | 1990-03-28 | 1991-10-02 | British United Shoe Machinery | Adhesive supply system |
| GB2242369A (en) * | 1990-03-28 | 1991-10-02 | British United Shoe Machinery | Metering system for flowable components |
| WO1994026353A1 (en) * | 1993-05-06 | 1994-11-24 | Gary Trevor Love | A foam proportioner |
| US5588813A (en) * | 1992-05-07 | 1996-12-31 | Berke Joergensen Joergen | Fluid motor driven pump arrangement having motive fluid exhaust into the pump chamber |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111622739A (en) * | 2020-07-03 | 2020-09-04 | 东营正大金属制品有限公司 | Unpowered automatic metering device and method for oil well drainage |
| CN112473409A (en) * | 2020-10-20 | 2021-03-12 | 湖南广思科技有限公司 | Rapid controllable proportion liquid mixing equipment and operation method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB394952A (en) * | 1930-10-24 | 1933-07-06 | Heinrich Lanz Ag | Improvements in internal combustion engines |
| GB1296354A (en) * | 1968-10-25 | 1972-11-15 | ||
| GB1418026A (en) * | 1972-03-21 | 1975-12-17 | British United Shoe Machinery | Apparatus adapted for use in dispensing a composition provided by mixing together a plurality of constituent compositions |
| GB1433599A (en) * | 1972-07-28 | 1976-04-28 | British United Shoe Machinery | Mixing two liquid constituent materials in relative quantities in accordance with a predetermined feed ratio and dispensing them as mixed composition |
| GB1539977A (en) * | 1975-12-13 | 1979-02-07 | Burkhard W | Dispensing apparatus |
| GB1578982A (en) * | 1976-03-25 | 1980-11-12 | Krueger W F | Apparatus for metering material from one location to another |
| EP0098419A1 (en) * | 1982-07-05 | 1984-01-18 | Bode Chemie GmbH & Co. | Equipment for the addition of a disinfectant to water |
-
1983
- 1983-09-21 GB GB08325307A patent/GB2147056B/en not_active Expired
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB394952A (en) * | 1930-10-24 | 1933-07-06 | Heinrich Lanz Ag | Improvements in internal combustion engines |
| GB1296354A (en) * | 1968-10-25 | 1972-11-15 | ||
| GB1418026A (en) * | 1972-03-21 | 1975-12-17 | British United Shoe Machinery | Apparatus adapted for use in dispensing a composition provided by mixing together a plurality of constituent compositions |
| GB1433599A (en) * | 1972-07-28 | 1976-04-28 | British United Shoe Machinery | Mixing two liquid constituent materials in relative quantities in accordance with a predetermined feed ratio and dispensing them as mixed composition |
| GB1539977A (en) * | 1975-12-13 | 1979-02-07 | Burkhard W | Dispensing apparatus |
| GB1578982A (en) * | 1976-03-25 | 1980-11-12 | Krueger W F | Apparatus for metering material from one location to another |
| EP0098419A1 (en) * | 1982-07-05 | 1984-01-18 | Bode Chemie GmbH & Co. | Equipment for the addition of a disinfectant to water |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0226070A2 (en) * | 1985-12-13 | 1987-06-24 | Böllhoff Verfahrenstechnik GmbH & Co. KG | Pump arrangement for delivering measured quantities of at least two components |
| EP0226070A3 (en) * | 1985-12-13 | 1989-01-25 | Kopperschmidt-Mueller Gmbh & Co Kg | Pump arrangement for delivering measured quantities of at least two components |
| JPH0754118B2 (en) | 1985-12-13 | 1995-06-07 | コツパ−シユミツト−ミユ−ラ− ゲゼルシヤフト ミツト ベシユレンクタ− ハフツング ウント コムパニ− コマンデイ−ト ゲゼルシヤフト | Pumping device for compounding and feeding at least two components |
| GB2222208A (en) * | 1988-05-13 | 1990-02-28 | Apex Fuels Ltd | Pumping apparatus |
| GB2222208B (en) * | 1988-05-13 | 1993-02-24 | Apex Fuels Ltd | Pumping apparatus |
| GB2242368A (en) * | 1990-03-28 | 1991-10-02 | British United Shoe Machinery | Adhesive supply system |
| GB2242369A (en) * | 1990-03-28 | 1991-10-02 | British United Shoe Machinery | Metering system for flowable components |
| US5588813A (en) * | 1992-05-07 | 1996-12-31 | Berke Joergensen Joergen | Fluid motor driven pump arrangement having motive fluid exhaust into the pump chamber |
| WO1994026353A1 (en) * | 1993-05-06 | 1994-11-24 | Gary Trevor Love | A foam proportioner |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2147056B (en) | 1986-11-12 |
| GB8325307D0 (en) | 1983-10-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |