Patent US4772389A successfully refreshed from Google Patents.
US4772389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe and its retainer in a tank
Assignee: Dow Chemical Canada ULC
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Filing: 1987-07-21
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Granted: 1988-09-20
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Expires: 2007-07-21
Abstract
Abstract In a septic tank, an elbow pipe mounted therein and a keyway made in the top wall of the tank and longitudinally aligned with a circular opening formed in an end wall adjacent the top wall of the tank. The elbow pipe has a key adapted for outward sliding engagement in the keyway. The elbow pipe fits within a sealing gasket adapted to snap into the circular opening of the end wall and its end portion is threaded. A connector sleeve is screwed on the end of the elbow to secure the elbow within the gasket and to receive a drain pipe glued within the sleeve.
Inventors
- 👤 Denis Guibault
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:38
CPC Classifications
E; E03; E03F; E03F11/00; F; F16; F16L; F16L41/00; F16L41/08; F16L41/088
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
117 words
The combination of a tank with a pipe and mounting means for mounting said pipe within said tank; said tank comprising side walls, at least one end wall and a top wall; an access orifice formed in said top wall; a circular opening made in said end wall adjacent said top wall; a pipe mounting means formed in said top wall exposed within said tank and extending inwardly from said end wall and longitudinally aligned with said circular opening; said pipe having an outer end; said pipe being provided with a sealing means at its outer end adapted to engage said circular opening; said pipe further having a pipe mounting member complementary to said pipe mounting means.
Claim 2
Dependent Claim
117 words
The combination of a tank with a pipe and mounting means for mounting said pipe within said tank; said tank comprising side walls, at least one end wall and a top wall; an access orifice formed in said top wall; a circular opening made in said end wall adjacent said top wall; a pipe mounting means formed in said top wall exposed within said tank and extending inwardly from said end wall and longitudinally aligned with said circular opening; said pipe having an outer end; said pipe being provided with a sealing means at its outer end adapted to engage said circular opening; said pipe further having a pipe mounting member complementary to said pipe mounting means.
Claim 3
Dependent Claim
34 words
The combination as defined in claim 1, wherein said pipe mounting means is an elongated keyway open at its inner end and said mounting member is a key adapted to slide in said keyway.
Claim 4
Dependent Claim
24 words
The combination as defined in claim 2, wherein said keyway is cross-sectionally T-shaped and said key is also cross-sectionally T-shaped but in smaller dimensions.
Claim 5
Dependent Claim
31 words
The combination as defined in claim 3, wherein said sealing means is an annular gasket having a central, annular external groove adapted to receive the circumferential edge of said circular opening.
Claim 6
Dependent Claim
50 words
The combination as defined in claim 4, wherein said pipe is an elbow pipe having a fin projecting from its bend and forming a funnel communicating with the inside of said elbow pipe and in register with said access orifice when said elbow pipe is operatively positioned within said tank.
Claim 7
Independent Claim
110 words
The method of mounting an elbow pipe within a tank; the latter having an end wall, a top wall with an access orifice, a circular opening made in said end wall adjacent said top wall and an elbow pipe mounting means provided in said top wall; said elbow pipe having a mounting member complementary to said mounting means; a sealing means at said outer end; said method comprising the steps of: (a) lowering said elbow pipe into said tank through said access orifice; and (b) sliding said elbow pipe outwardly with said mounting member engaging said mounting means while inserting the outer end of said pipe through said circular opening.
Claim 8
Independent Claim
110 words
The method of mounting an elbow pipe within a tank; the latter having an end wall, a top wall with an access orifice, a circular opening made in said end wall adjacent said top wall and an elbow pipe mounting means provided in said top wall; said elbow pipe having a mounting member complementary to said mounting means; a sealing means at said outer end; said method comprising the steps of: (a) lowering said elbow pipe into said tank through said access orifice; and (b) sliding said elbow pipe outwardly with said mounting member engaging said mounting means while inserting the outer end of said pipe through said circular opening.
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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) | 1991-09-20 | 1992-03-21 | 1992-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-20 | 1996-03-21 | 1996-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-20 | 2000-03-21 | 2000-09-20 | $7700.00 | Window Closed / Lapsed |