US3776525A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Injection process
Assignee: Individual
•
Filing: 1973-03-26
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Granted: 1973-12-04
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Expires: 1993-03-26
Abstract
Abstract A method of injecting a plural component synthetic resin into a site where pressure and other conditions vary. A very high viscosity non-Newtonian fluid and a relatively low viscosity fluid are accurately metered in a proportioning pump system so that a small amount of the thin fluid and a large amount of the viscous fluid are supplied simultaneously to a blending device. Heat generating conditions of viscous shear are utilized in the blending device so that there is a substantial reduction in pressure across the blending device and a substantial elevation in temperature due to the internal heat generated by the viscous shear. The pressure on the resultant admixture is measured at the injection site, and the rate of fluid flow is adjusted to maintain that pressure at an approximate predetermined value. Injection is carried out at a predetermined elevated temperature. A substantial proportion of the heat required to elevate the temperature to the desired value is generated by viscous shear within the viscous component.
Inventors
- 👤 J Warner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:33
CPC Classifications
B; B29; B29B; B29B7/00; B29B7/74; B29B7/7404; E; E04; E04G; E04G23/00; E04G23/02; E04G23/0203; E04G23/0211; Y; Y10; Y10S; Y10S264/00; Y10S264/17
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
184 words
Method for injecting a multireactant synthetic resin against a varying discharge pressure comprising: selecting separate generally liquid reactants, which generally liquid reactants are adapted to being admixed and reacted together to form a synthetic resin, said generally liquid reactants including at least one low viscosity reactant and at least one high viscosity reactant, the viscosity of said high viscosity reactant being at least approximately 50 times greater than the viscosity of said low viscosity reactant, said viscosities being expressed in centipoises; continuously supplying each of said generally liquid reactants to a mixing station under positive pressure, the quantities of said generally liquid reactants that are supplied to said mixing station being proportioned in a predetermined ratio so that the quantity of said high viscosity reactant is at least about 5 times greater than the quantity of said low viscosity reactant; continuously blending said generally liquid reactants at said mixing station under conditions sufficient to elevate the temperature of said high viscosity rEactant by at least about 3* F.; and continuously injecting the resultant heated admixture responsive to said positive pressure into a predetermined location.
Claim 2
Dependent Claim
184 words
Method for injecting a multireactant synthetic resin against a varying discharge pressure comprising: selecting separate generally liquid reactants, which generally liquid reactants are adapted to being admixed and reacted together to form a synthetic resin, said generally liquid reactants including at least one low viscosity reactant and at least one high viscosity reactant, the viscosity of said high viscosity reactant being at least approximately 50 times greater than the viscosity of said low viscosity reactant, said viscosities being expressed in centipoises; continuously supplying each of said generally liquid reactants to a mixing station under positive pressure, the quantities of said generally liquid reactants that are supplied to said mixing station being proportioned in a predetermined ratio so that the quantity of said high viscosity reactant is at least about 5 times greater than the quantity of said low viscosity reactant; continuously blending said generally liquid reactants at said mixing station under conditions sufficient to elevate the temperature of said high viscosity rEactant by at least about 3* F.; and continuously injecting the resultant heated admixture responsive to said positive pressure into a predetermined location.
Claim 3
Dependent Claim
59 words
A method for injecting a multireactant synthetic resin according to claim 1 including injecting the resultant heated admixture at an approximate predetermined temperature and preheating at least the high viscosity reactant prior to blending the generally liquid reactants to such a temperature that the elevation of the temperature during said blending is sufficient to achieve said approximate predetermined temperature.
Claim 4
Dependent Claim
35 words
A method for injecting a multireactant synthetic resin according to claim 2 wherein said preheating is accomplished by subjecting the generally liquid high viscosity reactant to mechanical stirring of sufficient intensity to cause said preheating.
Claim 5
Dependent Claim
40 words
A method for injecting a multireactant synthetic resin according to claim 1 including conducting the blending of the generally liquid reactants under conditions such that the elevation of temperature of the resultant admixture is caused substantially entirely by said blending.
Claim 6
Dependent Claim
52 words
A method for injecting a multireactant synthetic resin according to claim 1 including determining the pressure exerted by the resultant heated admixture prior to injecting said resultant heated admixture and adjusting the flow rate of the generally liquid reactants to the mixing station to maintain said pressure at approximately a predetermined value.
Claim 7
Dependent Claim
53 words
A method for injecting a multireactant synthetic resin according to claim 1 wherein the generally liquid reactants are blended at the mixing station under conditions sufficient to elevate the temperature of the resultant admixture by at least about 5* F. and reduce the pressure by at least about 5 pounds per square inch.
Claim 8
Independent Claim
214 words
A method comprising the steps of: selecting a plurality of independent fluid components, which fluid components are adapted to being reacted together to produce a synthetic foaming resin, at least one of said fluid components being a high viscosity, non-Newtonian fluid having a viscosity in excess of approximately 30,000 centipoises at about 60* F., and at least one other of said fluid components being a low viscosity fluid having a viscosity of less than approximately 300 centipoises at about 60* F.; supplying said independent fluid components to a positive displacement proportioning pump system; operating said positive displacement proportioning pump system to provide said high viscosity, non-Newtonian fluid and said low viscosity fluid to a blending device in proportions of at least about 5 to 1, respectively; blending said fluid components into an intimate admixture in said blending device under conditions of heat generating viscous shear sufficient to elevate the temperature of the said high viscosity, non-Newtonian fluid by at least about 5* F.; discharging said intimate admixture from said blending device; determining the pressure on said intimate admixture adjacent the location where said intimate admixture is discharged from said blending device; and maintaining said pressure at approximately a predetermined value by adjusting the rate of flow of said fluid components to said blending device.
Claim 9
Independent Claim
214 words
A method comprising the steps of: selecting a plurality of independent fluid components, which fluid components are adapted to being reacted together to produce a synthetic foaming resin, at least one of said fluid components being a high viscosity, non-Newtonian fluid having a viscosity in excess of approximately 30,000 centipoises at about 60* F., and at least one other of said fluid components being a low viscosity fluid having a viscosity of less than approximately 300 centipoises at about 60* F.; supplying said independent fluid components to a positive displacement proportioning pump system; operating said positive displacement proportioning pump system to provide said high viscosity, non-Newtonian fluid and said low viscosity fluid to a blending device in proportions of at least about 5 to 1, respectively; blending said fluid components into an intimate admixture in said blending device under conditions of heat generating viscous shear sufficient to elevate the temperature of the said high viscosity, non-Newtonian fluid by at least about 5* F.; discharging said intimate admixture from said blending device; determining the pressure on said intimate admixture adjacent the location where said intimate admixture is discharged from said blending device; and maintaining said pressure at approximately a predetermined value by adjusting the rate of flow of said fluid components to said blending device.
Claim 10
Dependent Claim
40 words
A method of claim 7 including generating sufficient heat by viscous shear in the high viscosity, non-Newtonian fluid during the practice of said method to elevate the temperature of said high viscosity, non-Newtonian fluid by at least about 10* F.
Claim 11
Dependent Claim
53 words
A method of claim 7 including maintaining the pressure on the intimate admixture adjacent the location where the intimate admixture is discharged from the blending device at between about 5 and 40 pounds per square inch and wherein a pressure drop across said blending device is at least 5 pounds per square inch.
Claim 12
Independent Claim
136 words
A method comprising the steps of: selecting a plurality of independent fluid components, which fluid components are adapted to being reacted together to produce a synthetic resin; supplying said independent fluid components to a proportioning pump system; operating said proportioning pump system to supply said independent fluid components to a blending device in a predetermined ratio; blending said fluid components into an intimate admixture in said blending device under conditions sufficient to elevate the temperature of said fluid components by at least about 5* F.; discharging said intimate admixture from said blending device; determining the pressure on said intimate admixture adjacent the location where said intimate admixture is discharged from said blending device; and maintaining said pressure at approximately a predetermined value by adjusting the rate of flow of said fluid components to said blending device.
Claim 13
Independent Claim
136 words
A method comprising the steps of: selecting a plurality of independent fluid components, which fluid components are adapted to being reacted together to produce a synthetic resin; supplying said independent fluid components to a proportioning pump system; operating said proportioning pump system to supply said independent fluid components to a blending device in a predetermined ratio; blending said fluid components into an intimate admixture in said blending device under conditions sufficient to elevate the temperature of said fluid components by at least about 5* F.; discharging said intimate admixture from said blending device; determining the pressure on said intimate admixture adjacent the location where said intimate admixture is discharged from said blending device; and maintaining said pressure at approximately a predetermined value by adjusting the rate of flow of said fluid components to said blending device.
Claim 14
Independent Claim
140 words
A method comprising the steps of: selecting a plurality of independent fluid components, which fluid components are adapted to being reacted together to produce a synthetic resin; supplying said independent fluid components to a proportioning pump system; operating said proportioning pump system to supply said independent fluid components to a blending device in a predetermined ratio; blending said fluid components into an intimate admixture in said blending device under conditions sufficient to elevate the temperature of said fluid components by at least about 5* F.; discharging said intimate admixture from said blending device; determining the pressure on said intimate admixture adjacent the location where said intimate admixture is discharged from said blending device; and maintaining said pressure at a value up to an approximate predetermined value by adjusting the rate of flow of said fluid components to said blending device.
Claim 15
Independent Claim
140 words
A method comprising the steps of: selecting a plurality of independent fluid components, which fluid components are adapted to being reacted together to produce a synthetic resin; supplying said independent fluid components to a proportioning pump system; operating said proportioning pump system to supply said independent fluid components to a blending device in a predetermined ratio; blending said fluid components into an intimate admixture in said blending device under conditions sufficient to elevate the temperature of said fluid components by at least about 5* F.; discharging said intimate admixture from said blending device; determining the pressure on said intimate admixture adjacent the location where said intimate admixture is discharged from said blending device; and maintaining said pressure at a value up to an approximate predetermined value by adjusting the rate of flow of said fluid components to said blending device.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |