US3874544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure vessel with liner
Assignee: AMOLGA Corp
•
Filing: 1973-03-21
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Granted: 1975-04-01
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Expires: 1993-03-21
Abstract
Abstract A pressure vessel having a composite outer shell or wall of continuous wound glass filaments impregnated with a thermosetting resinous material. The interior of the shell or wall is lined with a blow molded plastic liner which has annular rings or grooves spaced along the entire cylindrical section of the shell. These rings or grooves mechanically lock the blow molded liner to the outer structural shell so that the liner is prevented from shrinking away from the shell when the vessel is subjected to low temperatures.
Inventors
- 👤 Emerson R Harmon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:02
CPC Classifications
F; F17; F17C; F17C1/00; F17C1/16; F17C2201/00; F17C2201/01; F17C2201/0104; F17C2201/0109; F17C2203/00; F17C2203/01; F17C2203/011; F17C2203/012; F17C2203/06; F17C2203/0602; F17C2203/0604; F17C2203/0612; F17C2203/0614; F17C2203/0619; F17C2203/0634; F17C2203/0658; F17C2203/0663; F17C2205/00; F17C2205/03; F17C2205/0388; F17C2205/0394; F17C2205/0397; F17C2209/00; F17C2209/23; F17C2209/232; F17C2221/00; F17C2221/01; F17C2221/011; F17C2270/00; F17C2270/07; F17C2270/0754
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
100 words
A LINED PRESSURE VESSEL COMPRISING AN OUTER SHEELL OF THERMOSETTING RESIN IMPREGNATED FLAMENTS, A CORROSION RESISTANT ONE PIECE PLASTIC LINER OVERLYING THE ENTIRE INNER SURFACE OF THE SHELL AND HAVING A COEFFICIENT OF THERMAL EXPANSION AND CONTRACTION SUBSTANTIALLY GREATER THAN THE SHELL, AND A PLURALITY OF LONGITUDINALLY SACED ANNULARLY EXTENDING ABUTMENTS INTEGRALLY PROVIDED ON THE OUTER SURFACE OF THE BODY OF THE LINER AND EMBEDDED IN INTIMATE ENGAGEMENT WITH THE RESIN IMPREGNATED FILAMENTS OF THE SHELL TO MECHANICALLY LOCK THE LINER TO THE SHELL AND RESTRAIN MOVEMENT OF THE LINER RELATIVE TO THE SHELL WHEN THE VESSEL IS IN SERVICE.
Claim 2
Dependent Claim
100 words
A LINED PRESSURE VESSEL COMPRISING AN OUTER SHEELL OF THERMOSETTING RESIN IMPREGNATED FLAMENTS, A CORROSION RESISTANT ONE PIECE PLASTIC LINER OVERLYING THE ENTIRE INNER SURFACE OF THE SHELL AND HAVING A COEFFICIENT OF THERMAL EXPANSION AND CONTRACTION SUBSTANTIALLY GREATER THAN THE SHELL, AND A PLURALITY OF LONGITUDINALLY SACED ANNULARLY EXTENDING ABUTMENTS INTEGRALLY PROVIDED ON THE OUTER SURFACE OF THE BODY OF THE LINER AND EMBEDDED IN INTIMATE ENGAGEMENT WITH THE RESIN IMPREGNATED FILAMENTS OF THE SHELL TO MECHANICALLY LOCK THE LINER TO THE SHELL AND RESTRAIN MOVEMENT OF THE LINER RELATIVE TO THE SHELL WHEN THE VESSEL IS IN SERVICE.
Claim 3
Dependent Claim
24 words
The lined pressure vessel of claim 1 in which the abutments are longitudinally spaced annular ribs projecting from the outer surface of the liner.
Claim 4
Dependent Claim
22 words
The lined pressure vessel of claim 1 in which the abutments are ribs extending spirally around the liner throughout the length thereof.
Claim 5
Dependent Claim
23 words
The lined pressure vessel of claim 1 in which the abutments are longitudinally spaced grooves provided in the outer surface of the liner.
Claim 6
Dependent Claim
51 words
The lined pressure vessel of claim 1 in which the liner is blow molded, polyethylene and the resin impregnated filaments are wound around the liner and the tank has a port at one end, and sharp corners are provided on the sides of each abutment toward the port in the tank.
Claim 7
Dependent Claim
22 words
The lined pressure vessel of claim 1, in which the abutments on the outer surface of the liner are of wedge shape.
Claim 8
Dependent Claim
59 words
The lined pressure vessel of claim 1 in which the abutments are spaced ribs with the ribs on one side of the liner extending partially around the circumferential surface of the liner and the ribs on the opposite side of the liner extending around the opposite circumferential surface of the liner and offset longitudinally from the first named ribs.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |