US4458831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable flow dispensing device
Assignee: WR Grace and Co
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Filing: 1982-07-19
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Granted: 1984-07-10
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Expires: 2002-07-19
Abstract
Abstract A dispensing device for mixing and dispensing multi-component liquid mixtures is described. The dispensing device comprises valve assemblies including a tapered valve plug and a correspondingly tapered valve seat and, downstream from the valve assemblies, respective orifices which provide access to a mixing and dispensing nozzle. The cross-sectional area of the orifices is about 1.7×10 -4 to 2.0×10 -3 sq. in. and the ratio of the cross-sectional area of the valve opening at any level of operation to the cross-sectional area of its respective downstream orifice is less than about 3.0. The device generally is configured as a dispensing "gun" and provides a capability for controlled variation in the flow rate of the liquid components and mixing of the components at a consistent volume ratio.
Inventors
- 👤 Peter M. Holleran
- 👤 Bruce H. Wisner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:26
CPC Classifications
B; B05; B05B; B05B7/00; B05B7/02; B05B7/04; B05B7/0408; B05B12/00; B05B12/002; B05B12/0022; B05B12/0024; B05B12/0026; B29; B29B; B29B7/00; B29B7/74; B29B7/7438; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/877; Y10T137/87708
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
246 words
A dispensing device for mixing and dispensing a multi-component fluid mixture comprising: housing means having inlets for introduction of separate streams of the fluid components of said mixture into said housing means and passages for the separate flow of said components through said housing means; valve means positioned within said housing means downstream from each of said inlets; means for actuating said valve means; orifices positioned downstream from each of said valve means, said orifices having a cross-sectional area of about 1.7×10 -4 to about 2.0×10 -3 sq. in.; and a nozzle accessed by said orifices and adapted for mixing and dispensing said fluid components; wherein said valve means can be actuated to provide a controlled variable and constant rate of flow of said fluid components through said passages; and said valve means comprise a valve plug comprising a cylindrical section and a rearwardly diverging tapered section diverging outward from said cylindrical section and a valve seat comprising a rearwardly diverging tapered bore having essentially the same taper as said tapered section of said valve plug, said valve plug being slidably positioned for axial movement of said tapered section and said cylindrical section in said tapered bore, said tapered section having a taper in the range of about 0.5/12 to about 4/12; and wherein the ratio of the cross-sectional area of the opening in said valve means at any level of actuation to the cross-sectional area of its respective downstream orifice is less than about 3.0.
Claim 2
Dependent Claim
246 words
A dispensing device for mixing and dispensing a multi-component fluid mixture comprising: housing means having inlets for introduction of separate streams of the fluid components of said mixture into said housing means and passages for the separate flow of said components through said housing means; valve means positioned within said housing means downstream from each of said inlets; means for actuating said valve means; orifices positioned downstream from each of said valve means, said orifices having a cross-sectional area of about 1.7×10 -4 to about 2.0×10 -3 sq. in.; and a nozzle accessed by said orifices and adapted for mixing and dispensing said fluid components; wherein said valve means can be actuated to provide a controlled variable and constant rate of flow of said fluid components through said passages; and said valve means comprise a valve plug comprising a cylindrical section and a rearwardly diverging tapered section diverging outward from said cylindrical section and a valve seat comprising a rearwardly diverging tapered bore having essentially the same taper as said tapered section of said valve plug, said valve plug being slidably positioned for axial movement of said tapered section and said cylindrical section in said tapered bore, said tapered section having a taper in the range of about 0.5/12 to about 4/12; and wherein the ratio of the cross-sectional area of the opening in said valve means at any level of actuation to the cross-sectional area of its respective downstream orifice is less than about 3.0.
Claim 3
Dependent Claim
11 words
A device of claim 1 wherein said taper is about 2/12.
Claim 4
Dependent Claim
33 words
A device of claim 1 wherein the ratio of the cross-sectional area of the opening in said valve means to the cross-sectional area of its respective downstream orifice is less than about 1.5.
Claim 5
Dependent Claim
14 words
A device of claim 1 wherein said nozzle is removably mounted on said housing.
Claim 6
Dependent Claim
280 words
A dispensing gun for mixing and dispensing a two fluid component urethane foam composition, said fluid components being retained under pressure in separate vessels remote from said gun, said gun comprising: a gun housing having a pair of inlets for the introduction of separate streams of said fluid components into said housing and passages for the separate flow of said components through said housing; a pair of valve assemblies positioned in said housing downstream from, respectively, each of said inlets; manually operated trigger means for actuating said valve assemblies simultaneously and equally; an orifice at the downstream terminus of each of said passages, said orifices having a cross-sectional area of about 1.7×10 -4 to about 2.0×10 -3 sq. in.; and a mixing and dispensing nozzle accessed by said orifices and comprising a mixing chamber; wherein said valve assemblies can be actuated to provide a controlled variable and constant rate of flow of said fluid components through passages; and said valve assemblies each comprise a valve plug comprising a cylindrical section and a rearwardly diverging tapered section diverging outward from said cylindrical section and a valve seat comprising a rearwardly diverging tapered bore having essentially the same taper as said tapered section of said valve plug, said valve plug being slidably positioned for axial movement of said tapered section and said cylindrical section in said tapered bore, said tapered section having a taper in the range of about 0.5/12 to about 4/12; and wherein the ratio of the cross-sectional area of the opening in each of said valve assemblies at any level of actutation to the cross-sectional area of each of the respective said downstream orifices is less than about 3.0.
Claim 7
Dependent Claim
280 words
A dispensing gun for mixing and dispensing a two fluid component urethane foam composition, said fluid components being retained under pressure in separate vessels remote from said gun, said gun comprising: a gun housing having a pair of inlets for the introduction of separate streams of said fluid components into said housing and passages for the separate flow of said components through said housing; a pair of valve assemblies positioned in said housing downstream from, respectively, each of said inlets; manually operated trigger means for actuating said valve assemblies simultaneously and equally; an orifice at the downstream terminus of each of said passages, said orifices having a cross-sectional area of about 1.7×10 -4 to about 2.0×10 -3 sq. in.; and a mixing and dispensing nozzle accessed by said orifices and comprising a mixing chamber; wherein said valve assemblies can be actuated to provide a controlled variable and constant rate of flow of said fluid components through passages; and said valve assemblies each comprise a valve plug comprising a cylindrical section and a rearwardly diverging tapered section diverging outward from said cylindrical section and a valve seat comprising a rearwardly diverging tapered bore having essentially the same taper as said tapered section of said valve plug, said valve plug being slidably positioned for axial movement of said tapered section and said cylindrical section in said tapered bore, said tapered section having a taper in the range of about 0.5/12 to about 4/12; and wherein the ratio of the cross-sectional area of the opening in each of said valve assemblies at any level of actutation to the cross-sectional area of each of the respective said downstream orifices is less than about 3.0.
Claim 8
Dependent Claim
11 words
A gun of claim 5 wherein said taper is about 2/12.
Claim 9
Dependent Claim
33 words
A gun of claim 5 wherein the ratio of the cross-sectional area of the opening in said valve means to the cross-sectional area of its respective downstream orifice is less than about 1.5.
Claim 10
Dependent Claim
14 words
A gun of claim 5 wherein said nozzle is removably mounted on said housing.
Claim 11
Dependent Claim
23 words
A gun of claim 5 wherein said valve plug has a maximum diameter in the range of about 0.10 to about 0.20 inch.
References Cited (Backward Citations)
US3096001A
Cited
US3399837A
Cited
US3366337A
Cited
US3633795A
Cited
US3633828A
Cited
US3784110A
Cited
US3784110B1
Cited
US4117551A
Cited
US4169545A
Cited
US4311254A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-10 | 1988-01-09 | 1988-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-10 | 1992-01-09 | 1992-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-10 | 1996-01-09 | 1996-07-10 | $7700.00 | Window Closed / Lapsed |