US4772389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe and its retainer in a tank
Assignee: Dow Chemical Canada ULC
•
Filing: 1987-07-21
•
Granted: 1988-09-20
•
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 21:14
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.
References Cited (Backward Citations)
US32312A
Cited
US2440762A
Cited
US2564172A
Cited
US3162469A
Cited
US3221881A
Cited
US3331620A
Cited
US3426903A
Cited
US3709527A
Cited
DE2343584A1
Cited
US3986963A
Cited
DE2412814A1
Cited
US3889984A
Cited
US4019760A
Cited
CA1080862A
Cited
USRE32312E
Cited
US4681684A
Cited
US4635966A
Cited
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 |