US3834715A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure seal assembly
Assignee: Dart Industries Inc
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Filing: 1972-04-26
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Granted: 1974-09-10
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Expires: 1992-04-26
Abstract
Abstract An improved pressure seal assembly is provided having an increased life span which comprises a lantern ring having an inlet to receive a sealing fluid and at least one outlet through which the sealing fluid passes, sealing fluid means in fluid communication with the inlet and outlet in the lantern ring for supplying a sealing fluid therethrough, and at least one chevron type packing ring located on each side of the lantern ring and having its convex surface thereof facing away from the lantern ring.
Inventors
- 👤 A Butler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:13
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/16; F04B53/162; F04B53/164; F16; F16J; F16J15/00; F16J15/16; F16J15/18; F16J15/182; F16J15/183; F16J15/40; Y; Y10; Y10S; Y10S277/00; Y10S277/926
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
79 words
A pressure seal assembly having in combination: a. a lantern ring having in its outer circumference an inlet opening connecting with passageways therethrough providing direct fluid access to each side thereof, b. means to supply a sealing fluid under pressure to said inlet opening, and c. at least one chevron type packing ring located to each side of said lantern ring and cooperatively aligned therewith so that the concave side of said packing ring faces toward said lantern ring.
Claim 2
Dependent Claim
79 words
A pressure seal assembly having in combination: a. a lantern ring having in its outer circumference an inlet opening connecting with passageways therethrough providing direct fluid access to each side thereof, b. means to supply a sealing fluid under pressure to said inlet opening, and c. at least one chevron type packing ring located to each side of said lantern ring and cooperatively aligned therewith so that the concave side of said packing ring faces toward said lantern ring.
Claim 3
Dependent Claim
38 words
The pressure seal assembly of claim 1 wherein a follower ring is cooperatively positioned between each side of said lantern ring and said cooperatively aligned chevron type packing ring located to the respective side of said lantern ring.
Claim 4
Dependent Claim
37 words
The pressure seal assembly of claim 2 wherein the side of said follower ring which is away from said lantern ring is shaped to fit inside of the concave side of the adjacent chevron type packing ring.
Claim 5
Dependent Claim
246 words
A pressure seal assembly having in combination: a. a lantern ring having radially extending walls on each side, an inlet opening for sealing fluid in its outer circumference, at least one outlet opening in each side wall thereof, and internal passageways from said inlet opening to said outlet openings providing fluid communication therebetween, b. a middle follower ring on each side of said lantern ring, each of said follower rings having a radially extending side wall in contact with the adjacent side wall of said lantern ring and a convex surface facing away from said lantern ring on its other side, c. a packing ring immediately adjacent to each of said middle follower rings said packing ring having a concave side in direct contact with the convex surface of said follower ring and on its other side a convex surface facing away from said follower ring, d. at least one additional packing ring located to each side of said lantern ring, said additional packing ring having a concave side in contact with the convex surface of the packing ring described in (c) and a convex surface on its other side, and e. an outer follower ring located to the outside of the outermost packing ring described in (d) on each side of said pressure seal assembly, said outer follower ring having a concave side wall in contact with the convex surface of said outermost packing ring and a radially extending side wall on its outer side.
Claim 6
Dependent Claim
246 words
A pressure seal assembly having in combination: a. a lantern ring having radially extending walls on each side, an inlet opening for sealing fluid in its outer circumference, at least one outlet opening in each side wall thereof, and internal passageways from said inlet opening to said outlet openings providing fluid communication therebetween, b. a middle follower ring on each side of said lantern ring, each of said follower rings having a radially extending side wall in contact with the adjacent side wall of said lantern ring and a convex surface facing away from said lantern ring on its other side, c. a packing ring immediately adjacent to each of said middle follower rings said packing ring having a concave side in direct contact with the convex surface of said follower ring and on its other side a convex surface facing away from said follower ring, d. at least one additional packing ring located to each side of said lantern ring, said additional packing ring having a concave side in contact with the convex surface of the packing ring described in (c) and a convex surface on its other side, and e. an outer follower ring located to the outside of the outermost packing ring described in (d) on each side of said pressure seal assembly, said outer follower ring having a concave side wall in contact with the convex surface of said outermost packing ring and a radially extending side wall on its outer side.
Claim 7
Dependent Claim
33 words
The pressure seal assembly of claim 4 wherein a back-up ring is located next to each of said outer follower rings, said back-up ring having radially extending side walls on each side thereof.
Claim 8
Independent Claim
129 words
A method of providing a pressure seal around a cylindrical pumping element supplying a system with process fluid under high pressure which comprises: a. surrounding said pumping means with an annular seal assembly which includes a lantern ring having an inlet opening in its outer circumference and connecting passageways through same providing direct fluid access to each side thereof combined with at least one chevron type packing ring located to each side of said lantern ring aligned with the concave side of said packing ring facing toward said lantern ring and b. supplying a sealing fluid to the inlet opening of said lantern ring under a pressure sufficient to urge apart the lip portions of the tapering wall sections surrounding the concave oortion of said chevron type packing rings.
Claim 9
Independent Claim
129 words
A method of providing a pressure seal around a cylindrical pumping element supplying a system with process fluid under high pressure which comprises: a. surrounding said pumping means with an annular seal assembly which includes a lantern ring having an inlet opening in its outer circumference and connecting passageways through same providing direct fluid access to each side thereof combined with at least one chevron type packing ring located to each side of said lantern ring aligned with the concave side of said packing ring facing toward said lantern ring and b. supplying a sealing fluid to the inlet opening of said lantern ring under a pressure sufficient to urge apart the lip portions of the tapering wall sections surrounding the concave oortion of said chevron type packing rings.
Claim 10
Dependent Claim
28 words
The method of claim 6 in which the sealing fluid is supplied under a pressure which is at least equal to the process fluid pressure in said system.
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) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |