Pressure vessel with liner

• US 3,874,544 A
• Filed: 03/21/1973
• Issued: 04/01/1975
• Est. Priority Date: 03/21/1973
• Status: Expired due to Term

• Current Assignee: Emerson R. Harmon
• Original Assignee: Emerson R. Harmon
• Inventors: Harmon, Emerson R.
• Primary Examiner(s): Price, William I.
• Assistant Examiner(s): Shoap, Allan N.
• Application Number:
  US05/343,200
• Time in Patent Office: 741 Days
• Field of Search: 220/3,63R,83,72,63 138/147,144 156/172 137/144,147
• US Class Current: 220/590
• CPC Class Codes: F17C 1/16 constructed of plastics materials shaping of plastics B29C
• CPC Class Codes: F17C 2201/0109 with exteriorly curved end-piece
• CPC Class Codes: F17C 2203/012 on or in the wall, e.g. ribs
• CPC Class Codes: F17C 2203/0604 Liners
• CPC Class Codes: F17C 2203/0619 with two layers
• CPC Class Codes: F17C 2203/0663 in form of fibers or filaments
• CPC Class Codes: F17C 2205/0397 on both sides of the pressure vessel
• CPC Class Codes: F17C 2209/232 of walls
• CPC Class Codes: F17C 2221/011 Oxygen
• CPC Class Codes: F17C 2270/0754 Fire extinguishers

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.

Claims

1. 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.

2. The lined pressure vessel of claim 1 in which the abutments are longitudinally spaced annular ribs projecting from the outer surface of the liner.

3. The lined pressure vessel of claim 1 in which the abutments are ribs extending spirally around the liner throughout the length thereof.

4. The lined pressure vessel of claim 1 in which the abutments are longitudinally spaced grooves provided in the outer surface of the liner.

5. 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.

6. The lined pressure vessel of claim 1, in which the abutments on the outer surface of the liner are of wedge shape.

7. 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.