Patent US3704723A successfully refreshed from Google Patents.
US3704723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pvc manifold
Assignee: Wheaton Industries Inc
•
Filing: 1971-08-16
•
Granted: 1972-12-05
•
Expires: 1991-08-16
Abstract
Abstract Manifold for dividing molten PVC stream into a plurality of branch streams wherein the trunk passageway is divided into a plurality of diverging branch passageways none of which makes an angle of less than 110* with the trunk passageway and any adjacent two of which converge with one another at a sharp stream splitting wall intersection of 140* or less. In the preferred form of the present invention four parallel one-fourth to onehalf inch secondary branch passageways are provided by dividing a first trunk passageway into two branch passageways symmetrical with respect to the trunk passageway converging with one another in an angle of about 140*, each of which is subsequently divided into secondary branches one of which makes an angle of 110* with the first branch and the other of which is coaxial with the first branch for a short distance and then is angled to parallel the other secondary branch.
Inventors
- 👤 Theodore C Wheaton
- 👤 Daniel J Mikus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:06
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/26; B29C45/27; B29C45/2725; B29C2045/2772; Y; Y10; Y10T; Y10T137/00; Y10T137/6416; Y10T137/6606; Y10T137/8593; Y10T137/85938
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
95 words
Manifold for dividing a molten polyvinyl chloride stream in a trunk passageway into a plurality of such streams in branch passageways, said manifold defining said trunk passage-way and said plurality of branch passageways, means for maintaining all of said passageways at 300* to 350*F, all of the walls of all said passageways being smooth, any two adjacent branch passageways converging at an enclosed angle of no more than 140* with a sharp, non-rounded line of intersection therebetween, and an enclosed angle between any of said branch passageways and said trunk passageway of more than 110*.
Claim 2
Dependent Claim
95 words
Manifold for dividing a molten polyvinyl chloride stream in a trunk passageway into a plurality of such streams in branch passageways, said manifold defining said trunk passage-way and said plurality of branch passageways, means for maintaining all of said passageways at 300* to 350*F, all of the walls of all said passageways being smooth, any two adjacent branch passageways converging at an enclosed angle of no more than 140* with a sharp, non-rounded line of intersection therebetween, and an enclosed angle between any of said branch passageways and said trunk passageway of more than 110*.
Claim 3
Dependent Claim
80 words
Manifold, as recited in claim 1, wherein said branch passageways are in turn divided into secondary branch passageways, said secondary branch passageways also having smooth walls and means for maintaining the temperature thereof in the range of 300* to 350*F, said secondary branch passageways forming no angle with said first branch passageway of less than 110*, any adjacent two of said secondary branch passageways converging at an angle of no more than 140* with a sharp line of intersection therebetween.
Claim 4
Dependent Claim
136 words
Manifold, as recited in claim 2, wherein all of said passageways are circular in cross-section, wherein the diameter of said trunk passageway is one-quarter to one-half inches, the diameter of said branch passageways is one-quarter to one-half inches, and the diameter of said secondary branch passageways is one-quarter to one-half inches, and wherein said trunk passageway is divided symmetrically into two branch passageways converging with an enclosed angle therebetween of 140*, each of said branch passageways in turn being divided into two secondary branch passageways, one of said secondary branches being coaxial with said branch, thereafter making an 110* bend, the other of said secondary branches intersecting said branch at 110*, all of said intersections and bends being such as to result in four secondary branch passageways all parallel to the axis of the trunk passageway.
Claim 5
Dependent Claim
22 words
Manifold, as recited in claim 3, wherein the diameters of all of said passageways is on the order of one half inch.
Claim 6
Dependent Claim
52 words
Manifold, as recited in claim 1, combined with a means for supplying polyvinyl chloride at a temperature of 320* to 380*F, a pressure of 6,000 to 9,000 PSI, and a rate of 3 to 6 grams/second, said passageways being circular in cross-section and having a diameter of one-quarter to one-half inch diameter.
Claim 7
Dependent Claim
58 words
Manifold, as recited in claim 1, wherein said trunk passageway is circular in cross-section, has a diameter of one-quarter to one-half inch and is divided into two branch passageways, each circular in cross-section with a diameter of one-quarter to one-half inches, said branch passageways converging at an angle of 140* and each intersecting said trunk passageway at 110*.
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) | 1975-12-05 | 1976-06-05 | 1976-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-05 | 1980-06-05 | 1980-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-05 | 1984-06-05 | 1984-12-05 | $7700.00 | Window Closed / Lapsed |