Patent US3623629A successfully refreshed from Google Patents.
US3623629A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tank liner
Assignee: UNIT LINER Co
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Filing: 1969-02-27
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Granted: 1971-11-30
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Expires: 1989-02-27
Abstract
Abstract A corrosion-resistant and leakproof liner for tanks formed of flexible material and suitable for use on a variety of tanks having different sized cleanout openings. The liner has a transversely extending tubular neck portion having transverse dimensions corresponding to the transverse dimensions of the smallest standard cleanout opening of a tank of a particular size. The tubular neck portion of the liner is extended through the cleanout opening and then overlaps the flange provided on the outer end of the cleanout opening neck. When the transverse dimensions of the cleanout opening are larger than the transverse dimensions of the tubular neck portion of the liner, a lightweight support is positioned in the cleanout opening and supports the tubular neck portion of the liner to prevent collapse of the tubular neck portion of the liner and maintain a cleanout opening for the tank.
Inventors
- 👤 John A Hendershot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:45
CPC Classifications
B; B65; B65D; B65D90/00; B65D90/02; B65D90/04; B65D90/046; Y; Y10; Y10S; Y10S220/00; Y10S220/917
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
230 words
In combination with a tank having a top and bottom, a cleanout opening in one sidewall thereof surrounded by a neck, and a mounting flange around the outer end of the neck to mate with a cover plate for the cleanout opening, the improvement comprising: a liner of flexible material suspended in the tank and covering the sidewalls and bottom of the tank; said liner having a tubular neck portion extending from a side thereof through the tank cleanout opening, and having a flap on the outer end thereof overlapping the mounting flange; said tubular neck portion having transverse dimensions less than the transverse dimensions of the cleanout opening neck; said flap having dimensions such that it is of larger area than said mounting flange and projects beyond said mounting flange in directions away from said neck; a support positioned in the cleanout opening neck around the tubular neck portion of the liner and supporting that portion of the tubular neck portion of the liner transversing the cleanout opening neck, said support being formed of an easily worked synthetic resin material for fitting in said cleanout opening snugly around said tubular neck portion of said liner; and a sheet of corrosion-resistant material positioned over the face of the cleanout opening cover plate facing the interior of the tank and extending between the cleanout opening cover plate and the mounting flange.
Claim 2
Dependent Claim
230 words
In combination with a tank having a top and bottom, a cleanout opening in one sidewall thereof surrounded by a neck, and a mounting flange around the outer end of the neck to mate with a cover plate for the cleanout opening, the improvement comprising: a liner of flexible material suspended in the tank and covering the sidewalls and bottom of the tank; said liner having a tubular neck portion extending from a side thereof through the tank cleanout opening, and having a flap on the outer end thereof overlapping the mounting flange; said tubular neck portion having transverse dimensions less than the transverse dimensions of the cleanout opening neck; said flap having dimensions such that it is of larger area than said mounting flange and projects beyond said mounting flange in directions away from said neck; a support positioned in the cleanout opening neck around the tubular neck portion of the liner and supporting that portion of the tubular neck portion of the liner transversing the cleanout opening neck, said support being formed of an easily worked synthetic resin material for fitting in said cleanout opening snugly around said tubular neck portion of said liner; and a sheet of corrosion-resistant material positioned over the face of the cleanout opening cover plate facing the interior of the tank and extending between the cleanout opening cover plate and the mounting flange.
Claim 3
Dependent Claim
42 words
The combination defined in claim 1 wherein a hem is formed around the upper end of the liner and characterized further to include a support tube positioned in the hem, and meanS suspending the support tube from the top of the tank.
Claim 4
Dependent Claim
14 words
The combination defined in claim 1 wherein said support is formed of styrene plastic.
Claim 5
Dependent Claim
186 words
In combination with a tank having a top and bottom, a cleanout opening in one sidewall thereof surrounded by a neck, and a mounting flange around the outer end of the neck to mate with a cover plate for the cleanout opening, the improvement comprising: a liner of flexible material in the tank open at its upper end and covering the sidewalls and bottom of the tank, said liner having a tubular neck portion extending from a side thereof through the tank cleanout opening and having a flap on the outer end thereof overlapping the mounting flange, said tubular neck portion having transverse dimensions less than than the transverse dimensions of the cleanout opening neck, said liner also having a hem formed around the upper end thereof; a support tube positioned in said hem; means suspending the support tube from the top of the tank and thereby suspending the liner in the tank; and a support positioned in the cleanout opening neck around the tubular neck portion of the liner supporting that portion of the tubular neck portion of the liner transversing the cleanout opening neck.
Claim 6
Dependent Claim
186 words
In combination with a tank having a top and bottom, a cleanout opening in one sidewall thereof surrounded by a neck, and a mounting flange around the outer end of the neck to mate with a cover plate for the cleanout opening, the improvement comprising: a liner of flexible material in the tank open at its upper end and covering the sidewalls and bottom of the tank, said liner having a tubular neck portion extending from a side thereof through the tank cleanout opening and having a flap on the outer end thereof overlapping the mounting flange, said tubular neck portion having transverse dimensions less than than the transverse dimensions of the cleanout opening neck, said liner also having a hem formed around the upper end thereof; a support tube positioned in said hem; means suspending the support tube from the top of the tank and thereby suspending the liner in the tank; and a support positioned in the cleanout opening neck around the tubular neck portion of the liner supporting that portion of the tubular neck portion of the liner transversing the cleanout opening neck.
Claim 7
Dependent Claim
217 words
In a method of lining a tank having a top and bottom, a cleanout opening in one sidewall thereof surrounded by a neck, and a mounting flange around the outer end of the neck to mate without a cleanout opening cover plate, the steps of: forming a flexible liner in a shape to cover and contact the sides and cover the bottom of the tank and have a tubular neck portion on one side thereof with a rectangular flap on the outer end thereof and having transverse dimensions less than the transverse dimensions of the cleanout opening and a length substantially equal to the length of the cleanout opening neck; suspending the liner in the tank with the tubular neck portion of the liner mating with the cleanout opening; fitting a support in the cleanout opening neck; forming an opening through the support conforming to the transverse dimensions of the tubular neck portion of the liner; extending the tubular neck portion of the liner through the support and the flap radially outward over the mounting flange; cutting off that portion of the flap of the liner extending radially beyond the mounting flange; securing the cleanout opening cover plate to the mounting flange over that portion of the tubular neck portion of the liner overlapping the mounting flange.
Claim 8
Dependent Claim
217 words
In a method of lining a tank having a top and bottom, a cleanout opening in one sidewall thereof surrounded by a neck, and a mounting flange around the outer end of the neck to mate without a cleanout opening cover plate, the steps of: forming a flexible liner in a shape to cover and contact the sides and cover the bottom of the tank and have a tubular neck portion on one side thereof with a rectangular flap on the outer end thereof and having transverse dimensions less than the transverse dimensions of the cleanout opening and a length substantially equal to the length of the cleanout opening neck; suspending the liner in the tank with the tubular neck portion of the liner mating with the cleanout opening; fitting a support in the cleanout opening neck; forming an opening through the support conforming to the transverse dimensions of the tubular neck portion of the liner; extending the tubular neck portion of the liner through the support and the flap radially outward over the mounting flange; cutting off that portion of the flap of the liner extending radially beyond the mounting flange; securing the cleanout opening cover plate to the mounting flange over that portion of the tubular neck portion of the liner overlapping the mounting flange.
Claim 9
Dependent Claim
15 words
The method defined in claim 5 wherein the liner is formed about 30 mils thick.
Claim 10
Dependent Claim
14 words
The method defined in claim 5 wherein the support is formed of styrene plastic.
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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) | 1974-11-29 | 1975-05-31 | 1975-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-29 | 1979-05-31 | 1979-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-29 | 1983-05-31 | 1983-11-30 | $7700.00 | Window Closed / Lapsed |