US20100059552A1 - Fluid dispensing valve with a spring plate - Google Patents

Fluid dispensing valve with a spring plate Download PDF

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Publication number
US20100059552A1
US20100059552A1 US12/556,185 US55618509A US2010059552A1 US 20100059552 A1 US20100059552 A1 US 20100059552A1 US 55618509 A US55618509 A US 55618509A US 2010059552 A1 US2010059552 A1 US 2010059552A1
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US
United States
Prior art keywords
aperture
fluid
sealing member
dispensing valve
springs
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
Application number
US12/556,185
Inventor
Alvin R. Miller
Sven A. Wedekin
Andrew L. Johnson
Christian Vega
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GPD GLOBAL Inc
Original Assignee
GPD GLOBAL Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to US9587308P priority Critical
Application filed by GPD GLOBAL Inc filed Critical GPD GLOBAL Inc
Priority to US12/556,185 priority patent/US20100059552A1/en
Assigned to GPD GLOBAL, INC. reassignment GPD GLOBAL, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: JOHNSON, ANDREW L., MILLER, ALVIN R., VEGA, CHRISTIAN, WEDEKIN, SVEN A.
Publication of US20100059552A1 publication Critical patent/US20100059552A1/en
Application status is Abandoned legal-status Critical

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05CAPPARATUS FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C5/00Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/02Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
    • B05C5/0225Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work characterised by flow controlling means, e.g. valves, located proximate the outlet
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/30Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
    • B05B1/3006Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the controlling element being actuated by the pressure of the fluid to be sprayed

Abstract

A fluid-dispensing valve for dispensing pressurized fluid from a chamber employs a spring plate adjacent to the aperture. The spring plate includes a peripheral rim extending about the aperture, a sealing member abutting the aperture, and a plurality of springs extending from the peripheral rim to the sealing member. These springs bias the sealing member to close the aperture when the fluid pressure is less than a predetermined limit and allow the sealing member to open the aperture when the fluid pressure exceeds the limit.

Description

    RELATED APPLICATION
  • The present application is based on and claims priority to the Applicants' U.S. Provisional Patent Application 61/095,873, entitled “Fluid Dispensing Valve With A Spring Plate,” filed on Sep. 10, 2008.
  • BACKGROUND OF THE INVENTION
  • 1. Field of the Invention
  • The present invention relates generally to the field of valves for dispensing fluids. More specifically, the present invention discloses a fluid dispensing valve having a spring plate to prevent drips.
  • 2. Background of the Invention
  • The present invention addresses the problem of dispensing fluid materials at a high rate of speed accurately and without drips. Current dispensing technologies for fluid materials have an inherent problem of dripping when not in use unless some means is used to stop material flow. Conventional methods to stop fluid dripping involve mechanical means that are operated by pneumatics or electronics to open and close a material pathway. This method when activated imparts a delay at the beginning of the dispense process due to the retraction of the pathway sealing device as it pulls material into the dispense nozzle or material pathway. Additional dispense time is required to replenish the material that moved with the sealing device.
  • Subsequently, when conventional methods are employed to stop material flow, an extra quantity of material equivalent to the gap the sealing device must occupy is ejected, which can result in an undesirable bubble in the dispense path. To control the range of movement (i.e., stroke) in such conventional methods, a mechanical adjustment and setup are required that should be done with care and periodically checked to ensure dispense quantity.
  • Other conventional methods to control fluid material flow involve the induction of vacuum or ensuring the dispense pathway is a sealed environment. These methods are not quick to react as they require a pressurization and depressurization of the material pathway or reservoir that may change in volume over the life of the material reservoir. This pressurization step takes valuable dispense time and also can yield inconsistent results when the controlling volume increases as the level in the material reservoir decreases.
  • In contrast, the present invention substantially eliminates adjustment issues as it is a self-contained, consumable device requiring no adjustment. Dispense delay and excess material at the finish are all but eliminated.
  • SUMMARY OF THE INVENTION
  • This invention provides a valve for dispensing a fluid material having a spring plate to prevent drips. The spring plate has a sealing member suspended by springs that bias the sealing member to close the aperture when the fluid pressure is less than a predetermined limit, but allow the sealing member to move away from the aperture and permit fluid flow when this pressure limit is exceeded.
  • These and other advantages, features, and objects of the present invention will be more readily understood in view of the following detailed description and the drawings.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • The present invention can be more readily understood in conjunction with the accompanying drawings, in which:
  • FIG. 1 is an exploded perspective view of the aperture plate 20 and spring plate 30.
  • FIG. 2 is a side elevational view of the valve assembly.
  • FIG. 3 is a cross-sectional view of the valve assembly.
  • FIG. 4 is a detail cross-sectional view of the lower portion of the valve assembly.
  • DETAILED DESCRIPTION OF THE INVENTION
  • Turning to FIG. 1, an exploded perspective view is provided showing one embodiment of an aperture plate 20 and spring plate 30 employed in the present invention. FIGS. 2 and 3 are side elevational and cross-sectional views, respectively, of a valve assembly 10 incorporating the aperture plate 20 and spring plate 30. A detail cross-sectional view of the lower portion of the valve assembly 10 is illustrated in FIG. 4.
  • The other major components of the valve assembly 10 are discussed below. A feed tube 12 receives fluid from a reservoir and transmits fluid into the chamber 15 of the valve assembly 10. The fluid in the chamber 15 is pressurized by rotation of an auger screw 14 in the embodiment shown in the accompanying drawings. However, other types of pumps or pressure sources could be readily substituted. For example, the fluid in the chamber 15 could be pressurized by pneumatically-generated or motor-generated motion of a piston, or other mechanically or pneumatically-generated means. The pressurized fluid can be delivered from the chamber 15 via a needle 18.
  • As shown in FIG. 1, the aperture plate 20 can be a flat, rigid disk with an aperture 22 extending through the plate 20 for dispensing fluid from the chamber 15. The size of the aperture 22 can vary depending on the viscosity of the fluid.
  • The spring plate 30 is mounted immediately downstream from the aperture plate 20. Preferably, the spring plate 30 is directly below and abutting the aperture plate 20, as shown in FIGS. 3 and 4. In this embodiment, the spring plate 30 has a peripheral rim 32, a sealing member 36 that is aligned to seal the aperture 22 in the aperture plate 20, and a plurality of springs 34 suspending the sealing member 36 from the peripheral rim 32. As depicted in FIG. 1, the sealing member 36 can be a flat disk having a diameter large enough to seal the aperture 22 in the aperture disk 20. In this embodiment, the springs 34 and peripheral rim 32 are also substantially flat or planar. The peripheral rim 32 can be a flat ring that extends about the aperture 22.
  • The springs 34 serve to suspend the sealing member 36 from the peripheral rim 32 of the spring plate 30, but also to bias the sealing member 36 against the aperture 22 in the aperture plate 20. Preferably, the springs 34 extend in a radial pattern between the sealing member 36 and the peripheral rim 32. For example, the springs 34 can be a web of flat, U-shaped members allowing a range of elastic deformation in response to fluid pressure on the sealing member 36 exerted through the aperture 22 in the aperture disk 20. As shown, the entire spring plate 30 can be formed as a single, flat piece of material, such as sheet metal or plastic. Other types and configurations of elastically-deformable materials could be used as springs. For example, the springs 34 could be S-shaped, curved or a zig-zag shape. Coil springs could also be used.
  • In operation, the springs 34 bias the sealing member 36 upward against the aperture 22 in the plane of the spring plate 30. As long as the fluid pressure within the chamber 15 remains below a predetermined limit (i.e., a threshold value), the springs 34 exert sufficient force to hold the sealing member 36 against the aperture 22, and thereby seal the aperture 22 to prevent fluid flow through the aperture 22. However, if fluid pressure increases beyond this limit, the pressure exerted on the sealing member 36 is sufficient to elastically deform the springs 34 downward out of the plane of the spring plate 30 and push the sealing member 36 downward and away from the aperture 22 in the aperture plate 20. This unseals the aperture 22 and allows fluid flow through the aperture 22.
  • In other words, by using a combination of a stiff, non-flexing aperture plate 20 and a flexible, spring plate 30, a dynamic membrane is created that allows a fluid to pass when sufficient pressure is applied on the inlet side of the aperture 22. Pressure exceeding some threshold value will separate the plates 20, 30 allowing the fluid to pass. As long as the pressure is maintained fluid will continue to flow. Reducing the fluid pressure causes the plates 20, 30 to return to their normally closed state which stops fluid flow. The opening and closing action follows the pressure curve generated by the pressure source for the valve assembly 10 and has a specific pressure required to open and close. This specific pressure results in an even flow of material that eliminates excess or insufficient material.
  • The size of the aperture 22 should be specifically selected for physical properties of the fluid being dispensed and the operating parameters of the valve assembly, such as the range of fluid pressures. The aperture 22 size controls the fluid pressure exerted on the spring plate 30. If the aperture 22 is too large the fluid column will have enough pressure to overcome the spring plate sealing force and the system may drip. Similarly, the thickness and physical properties of the springs 34 and the dimensions of the sealing member 36 should also be specifically selected in light of the fluid properties and operating parameters. These design parameters can accommodate various levels of fluid fillers, viscosities and the pressure of the fluid column.
  • In the embodiment shown in FIGS. 2-4, the lower portion of the valve assembly 10 can be removed by unthreading a nut 16. This provides ready access to the chamber 15 and internal components of the valve assembly. The aperture plate 20 and spring plate 30 are also readily removable and can be quickly replaced. As shown most clearly in FIG. 4, the aperture plate 20 and spring plate 30 can be dropped into this lower portion of the valve assembly housing, which is then threaded with the nut 16 onto the upper portion of the valve assembly 10.
  • It should be noted that the aperture and spring plates 20, 30 are positioned between the chamber 15 of the valve assembly 10 and the outlet (i.e., needle 18. This configuration minimizes the distance from the fluid to travel from the pressure generator to the exit at the needle 18 orifice, which serves to minimize dispense time and increase the accuracy of the quantity of fluid dispensed.
  • The previous discussion and the drawings involve an embodiment of the present invention in which the aperture and spring plates 20, 30 are completely separate components. It should be understood that these components could be combined into one piece to simplify assembly and replacement. For example, the peripheral rim 32 of the spring plate 30 could be bonded or attached to the underside of the aperture plate 20.
  • The above disclosure sets forth a number of embodiments of the present invention described in detail with respect to the accompanying drawings. Those skilled in this art will appreciate that various changes, modifications, other structural arrangements, and other embodiments could be practiced under the teachings of the present invention without departing from the scope of this invention as set forth in the following claims.

Claims (13)

1. A fluid-dispensing valve comprising:
a chamber containing a fluid;
an aperture for dispensing pressurized fluid from the chamber; and
a spring plate adjacent to the aperture having:
(a) a peripheral rim extending about the aperture;
(b) a sealing member abutting the aperture; and
(c) a plurality of springs extending from the peripheral rim to the sealing member, said springs biasing the sealing member to close the aperture when the fluid pressure is less than a predetermined limit and allowing the sealing member to open the aperture when the fluid pressure exceeds the limit.
2. The fluid-dispensing valve of claim 1 wherein the springs extend in a radial pattern from the sealing member to the peripheral rim.
3. The fluid-dispensing valve of claim 1 further comprising an aperture plate containing the aperture, and wherein the spring plate abuts the aperture plate.
4. The fluid-dispensing valve of claim 1 wherein the springs comprise a flat curved shape.
5. The fluid-dispensing valve of claim 1 wherein the springs comprise a web of U-shaped members extending between the sealing member and the peripheral rim allowing a range of elastic deformation in response to fluid pressure on the sealing member.
6. The fluid-dispensing valve of claim 1 wherein the sealing member is substantially planar.
7. The fluid-dispensing valve of claim 1 wherein the spring plate is substantially planar when the aperture is closed, and wherein the springs elastically deform to move the sealing member away from the aperture in the open position.
8. The fluid-dispensing valve of claim 1 wherein the peripheral rim comprises a flat ring.
9. A fluid-dispensing valve comprising:
a chamber containing a fluid;
an aperture plate having an aperture for dispensing pressurized fluid from the chamber; and
a substantially planar spring plate abutting the aperture plate, said spring plate having:
(a) a peripheral rim extending about the aperture;
(b) a sealing member abutting the aperture; and
(c) a plurality of flat curved springs suspending the sealing member from the peripheral rim, said springs biasing the sealing member against the aperture to close the aperture when the fluid pressure is less than a predetermined limit, and deforming to move the sealing member away from the aperture to thereby open the aperture when the fluid pressure exceeds the limit.
10. The fluid-dispensing valve of claim 9 wherein the springs extend in a radial pattern from the sealing member to the peripheral rim.
11. The fluid-dispensing valve of claim 9 wherein the springs comprise a web of U-shaped members extending between the sealing member and the peripheral rim allowing a range of elastic deformation in response to fluid pressure on the sealing member.
12. The fluid-dispensing valve of claim 9 wherein the sealing member is substantially planar.
13. The fluid-dispensing valve of claim 9 wherein the peripheral rim comprises a flat ring.
US12/556,185 2008-09-10 2009-09-09 Fluid dispensing valve with a spring plate Abandoned US20100059552A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US9587308P true 2008-09-10 2008-09-10
US12/556,185 US20100059552A1 (en) 2008-09-10 2009-09-09 Fluid dispensing valve with a spring plate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US12/556,185 US20100059552A1 (en) 2008-09-10 2009-09-09 Fluid dispensing valve with a spring plate

Publications (1)

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US20100059552A1 true US20100059552A1 (en) 2010-03-11

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Citations (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1972344A (en) * 1931-11-13 1934-09-04 William E Jackson Tube closure
US2639194A (en) * 1950-12-21 1953-05-19 Spraying Systems Co Antidrip valve for spray nozzles
US3412910A (en) * 1966-02-01 1968-11-26 Trans Indent Ets Closure for tubes or the like
US3618825A (en) * 1969-12-15 1971-11-09 Robert E Clarke Closure for dispensing spout
US3623660A (en) * 1969-03-27 1971-11-30 Elicopter Soc Trasporti Aerei Dripproof valve for preventing the leakage of liquid products
US4660598A (en) * 1986-01-13 1987-04-28 Spraying Systems Co. Diaphragm-type antidrip valve
US4728006A (en) * 1984-04-27 1988-03-01 The Procter & Gamble Company Flexible container including self-sealing dispensing valve to provide automatic shut-off and leak resistant inverted storage
US4867200A (en) * 1988-06-30 1989-09-19 Markley George L Unidirectional fluid flow check valve assembly
US4913187A (en) * 1987-08-17 1990-04-03 Dresser Industries Compressor valve with flat spring
US5036880A (en) * 1990-02-08 1991-08-06 Cooper Industries High efficiency plate valve for reciprocating compressor
US5121840A (en) * 1989-09-29 1992-06-16 Henk Schram Inflatable body with a valve
US5275312A (en) * 1991-10-10 1994-01-04 Sofar Spa One-way valve suitable for use in particular in a container supplying a liquid under pressure
US5513832A (en) * 1994-04-22 1996-05-07 Lectron Products, Inc. Variable force solenoid valve
US5747102A (en) * 1995-11-16 1998-05-05 Nordson Corporation Method and apparatus for dispensing small amounts of liquid material
US6089272A (en) * 1998-02-08 2000-07-18 3By Ltd. Check valve
US6510868B2 (en) * 2000-01-11 2003-01-28 Coltec Industrial Products, Inc. Profiled plate valve
US6968976B2 (en) * 2002-06-26 2005-11-29 Masatoshi Masuda Valve mechanism for tube-type fluid container
US20060043117A1 (en) * 2004-08-30 2006-03-02 Rieke Corporation Airless dispensing pump with tamper evidence features
US7287546B2 (en) * 2003-03-14 2007-10-30 Denso Corporation Simple structure of fuel pressure regulator designed to minimize pressure loss
US20090071550A1 (en) * 2007-09-14 2009-03-19 Daryll Duane Patterson In-line adjustable regulators
US7694857B1 (en) * 2002-04-29 2010-04-13 Dl Technology, Llc Fluid dispense pump with drip prevention mechanism and method for controlling same

Patent Citations (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1972344A (en) * 1931-11-13 1934-09-04 William E Jackson Tube closure
US2639194A (en) * 1950-12-21 1953-05-19 Spraying Systems Co Antidrip valve for spray nozzles
US3412910A (en) * 1966-02-01 1968-11-26 Trans Indent Ets Closure for tubes or the like
US3623660A (en) * 1969-03-27 1971-11-30 Elicopter Soc Trasporti Aerei Dripproof valve for preventing the leakage of liquid products
US3618825A (en) * 1969-12-15 1971-11-09 Robert E Clarke Closure for dispensing spout
US4728006A (en) * 1984-04-27 1988-03-01 The Procter & Gamble Company Flexible container including self-sealing dispensing valve to provide automatic shut-off and leak resistant inverted storage
US4660598A (en) * 1986-01-13 1987-04-28 Spraying Systems Co. Diaphragm-type antidrip valve
US4913187A (en) * 1987-08-17 1990-04-03 Dresser Industries Compressor valve with flat spring
US4867200A (en) * 1988-06-30 1989-09-19 Markley George L Unidirectional fluid flow check valve assembly
US5121840A (en) * 1989-09-29 1992-06-16 Henk Schram Inflatable body with a valve
US5036880A (en) * 1990-02-08 1991-08-06 Cooper Industries High efficiency plate valve for reciprocating compressor
US5275312A (en) * 1991-10-10 1994-01-04 Sofar Spa One-way valve suitable for use in particular in a container supplying a liquid under pressure
US5513832A (en) * 1994-04-22 1996-05-07 Lectron Products, Inc. Variable force solenoid valve
US5747102A (en) * 1995-11-16 1998-05-05 Nordson Corporation Method and apparatus for dispensing small amounts of liquid material
US6089272A (en) * 1998-02-08 2000-07-18 3By Ltd. Check valve
US6510868B2 (en) * 2000-01-11 2003-01-28 Coltec Industrial Products, Inc. Profiled plate valve
US7694857B1 (en) * 2002-04-29 2010-04-13 Dl Technology, Llc Fluid dispense pump with drip prevention mechanism and method for controlling same
US6968976B2 (en) * 2002-06-26 2005-11-29 Masatoshi Masuda Valve mechanism for tube-type fluid container
US7287546B2 (en) * 2003-03-14 2007-10-30 Denso Corporation Simple structure of fuel pressure regulator designed to minimize pressure loss
US20060043117A1 (en) * 2004-08-30 2006-03-02 Rieke Corporation Airless dispensing pump with tamper evidence features
US20090071550A1 (en) * 2007-09-14 2009-03-19 Daryll Duane Patterson In-line adjustable regulators

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AS Assignment

Owner name: GPD GLOBAL, INC.,COLORADO

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:MILLER, ALVIN R.;WEDEKIN, SVEN A.;JOHNSON, ANDREW L.;AND OTHERS;REEL/FRAME:023207/0810

Effective date: 20090908

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION