US3760428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water closet tank
Assignee: Borg Warner Corp
•
Filing: 1971-10-29
•
Granted: 1973-09-25
•
Expires: 1991-10-29
Abstract
Abstract A flush tank and lid formed of molded plastic, are interlocked by means of one or more keys or tabs formed as part of the lid which engage complementary shaped grooves in the tank.
Inventors
- 👤 S Korol
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:08
CPC Classifications
E; E03; E03D; E03D1/00; E03D1/01
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
78 words
A flush tank for a water closet comprising: a plastic tank portion; a plastic lid portion; one of said portions having at least a pair of oppositely disposed notches, each with angularly arranged sidewalls which diverge toward the interior of the tank; and the other of said portions having for each notch extending tabs angularly complementary to each angularly arranged notch sidewall to engage said sidewalls and lock said portions together against, movement in at least one direction.
Claim 2
Dependent Claim
78 words
A flush tank for a water closet comprising: a plastic tank portion; a plastic lid portion; one of said portions having at least a pair of oppositely disposed notches, each with angularly arranged sidewalls which diverge toward the interior of the tank; and the other of said portions having for each notch extending tabs angularly complementary to each angularly arranged notch sidewall to engage said sidewalls and lock said portions together against, movement in at least one direction.
Claim 3
Dependent Claim
24 words
A flush tank as recited in claim 1 wherein said one portion is said tank portion and said other portion is said lid portion.
Claim 4
Dependent Claim
108 words
A flush tank for a water closet comprising: a plastic tank portion having a longitudinal ledge means defined by an upstanding wall portion of less thickness than the remainder of the wall; means in each of the opposed wall of less thickness defining a notch having angularly arranged sidewalls which diverge toward the interior of said tank portion; a plastic lid for covering said tank portion and having downwardly extending walls adapted to rest on said flange, said lid having tabs angularly complementary to the angularly arranged notch sidewalls for engaging said sidewalls to lock the lid to the tank portion against movement in at least one direction.
Claim 5
Dependent Claim
108 words
A flush tank for a water closet comprising: a plastic tank portion having a longitudinal ledge means defined by an upstanding wall portion of less thickness than the remainder of the wall; means in each of the opposed wall of less thickness defining a notch having angularly arranged sidewalls which diverge toward the interior of said tank portion; a plastic lid for covering said tank portion and having downwardly extending walls adapted to rest on said flange, said lid having tabs angularly complementary to the angularly arranged notch sidewalls for engaging said sidewalls to lock the lid to the tank portion against movement in at least one direction.
Claim 6
Dependent Claim
42 words
A flush tank as recited in claim 3 further including snap locking means at the ends of said tank comprising an enlargement of the walls of said lid portion adapted to engage a depression in the upstanding wall of the tank portion.
References Cited (Backward Citations)
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US2460427A
Cited
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Cited
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Cited
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Cited
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Cited
US3484015A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |