Edo Canada Ltd.

Honda Giken Kogyo Kabushiki Kaisha

Alternative Fuel Systems, Inc.

Sadanandan N Sirosh

Masayuki Tamura

Kazutaka Yokoyama

Hajime Endo

Hans C Van Oyen

A seal system for a pressure vessel which includes a substantially rigid outer shell with at least one opening therein, an inner liner disposed within the outer shell against the inside surface thereof, an opening aligned with the opening of the outer shell and a boss disposed in the opening of the outer shell. The boss includes a neck portion for fitting in the opening of the outer shell, a flange portion extending outwardly from one end of the neck portion and having an upper surface and a lower surface, and a generally cylindrical hollow substantially aligned with the outer shell opening and having an inwardly projecting annular shoulder. The lip segment of the liner extends radially inwardly under the lower surface of the flange portion of the boss and then upwardly into the hollow of the boss, along the interior wall of the hollow until a portion of the lip segment rests on the shoulder. The seal system includes an attachment or coupling device having a generally cylindrical, downwardly extending lower insert section. The lower insert section includes an annular bottom wall in which is formed an annular recess opened downwardly. An upper head section is formed at the upper end of the insert section and includes a radially extending flange. The insert section is dimensioned to fit in and be received by the hollow of the boss above the shoulder. The seal system also includes a resilient O-ring for disposition in the recess of the insert section of the coupling device to protrude from the recess a sufficient distance to contact and seal against the lip section of the liner resting on the shoulder of the boss hollow, when the insert section is fitted into the hollow.

Seal system for fluid pressure vessels

A fluid pressure vessel includes an exterior composite structural shell formed with a cylindrical sidewall and first and second dome-shaped end sections with two axially aligned openings in the end sections. An interior fluid impermeable liner is disposed in the shell to fit against the inside surface thereof, and includes two openings, each aligned with and adjacent to a respective one of the openings in the shell. A pair of end bosses are each disposed in respective adjacent openings of the shell and liner. The improvement of the invention involves forming the bosses so that each includes a cylindrical neck portion, an annular collar extending radially outwardly from the neck portion, a central hollow or bore extending axially through the neck portion, and an annular groove formed in the bore to include downwardly and inwardly sloping shoulders on one side of the groove. The perimeters of the openings in the liner are each formed with a first radially inwardly projecting section for overlying the top of the collar of a respective boss, and a second section projecting from an underside of the first section radially inwardly, for underlying the bottom of the collar of a respective boss, and upwardly into the bore, over the shoulder, to the groove.

Fluid pressure vessel boss-liner attachment system with liner/exterior

A fluid pressure vessel includes an exterior composite structural shell formed with a cylindrical sidewall and first and second dome-shaped end sections with two axially aligned openings in the end sections. An interior fluid impermeable liner is disposed in the shell to fit against the inside surface thereof, and includes two openings, each aligned with and adjacent to a respective one of the openings in the shell. A pair of end bosses are each disposed in respective adjacent openings of the shell and liner. The improvement of the invention involves forming the bosses so that each includes a cylindrical neck and an annular collar extending radially outwardly from the neck, and forming the perimeters of the openings in the liner each with a first radially inwardly projecting section for overlying the top of the collar of a respective boss, and a second section projecting from an underside of the first section radially inwardly for underlying the bottom of the collar of a respective boss. The first and second sections define an annular recess therebetween for receiving and encapsulating a collar of a boss to hold it in place in the pressure vessel.

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Calgary, Canada

Sadanandan N Sirosh