US3841668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe coupling
Assignee: Genova Products Inc
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Filing: 1973-05-21
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Granted: 1974-10-15
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Expires: 1993-05-21
Abstract
Abstract A transparent pipe coupling adapted primarily but not exclusively for use with plastic sewer pipe. The coupling can be welded at one end to a first length of plastic pipe and has a seal ring in an annular groove in the other end so that a second length of pipe can be inserted therein to provide an expansion joint. The transparent coupling has indicia thereon to enable positioning of the second length of pipe at a proper location in accordance with the ambient temperature. The transparent qualities of the coupling also permit proper inspection of the seal ring before and after insertion of the second pipe.
Inventors
- 👤 R Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:19
CPC Classifications
B; B29; B29C; B29C66/00; B29C66/50; B29C66/51; B29C66/53; B29C66/534; B29C66/5344; B29C65/00; B29C65/78; B29C65/7802; B29C65/7805; B29C65/7817; B29C65/7832; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/12; B29C66/122; B29C66/1222; B29C66/1224; B29C66/1226; B29C66/52; B29C66/522; B29C66/5229; B29C66/52291; B29C66/52292; B29C66/52296; B29C66/52297; B29C66/90; B29C66/91; B29C66/919; B29C66/9192; B29C66/91921; F; F16; F16L; F16L27/00; F16L27/12; F16L47/00; F16L47/18; F16L55/00; B29C65/02; B29C65/48; B29C65/4895; B29L; B29L2023/00; B29L2023/22
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
139 words
A coupling for connecting two pipes comprising a transparent cylinder which has an integral bore interrupted between its ends by a radially inwardly directed shoulder so that one of said pipes can be inserted into one end of the bore and secured therein in engagement with said shoulder, said bore having adjacent to its other end a radially inwardly opening sealing ring groove, and a seal ring in said groove so that the other of said pipes can be inserted into the other end of the bore in an axially movable and sealed relationship and the end of the second pipe will be visible through the transparent cylinder to indicate its position, said seal ring being visible through the transparent cylinder to allow inspection for proper position of the seal ring before and after insertion of said other pipe.
Claim 2
Dependent Claim
139 words
A coupling for connecting two pipes comprising a transparent cylinder which has an integral bore interrupted between its ends by a radially inwardly directed shoulder so that one of said pipes can be inserted into one end of the bore and secured therein in engagement with said shoulder, said bore having adjacent to its other end a radially inwardly opening sealing ring groove, and a seal ring in said groove so that the other of said pipes can be inserted into the other end of the bore in an axially movable and sealed relationship and the end of the second pipe will be visible through the transparent cylinder to indicate its position, said seal ring being visible through the transparent cylinder to allow inspection for proper position of the seal ring before and after insertion of said other pipe.
Claim 3
Dependent Claim
147 words
A coupling for connecting two pipes comprising a transparent cylinder which has an integral bore interrupted between its ends by a radially inwardly directed shoulder so that one of said pipes can be inserted into one end of the bore and secured therein in engagement with said shoulder, said bore having adjacent to its other end a radially inwardly opening sealing ring groove, and a seal ring in said groove so that the other of said pipes can be inserted into the other end of the bore in an axially movable and sealed relationship and the end of the second pipe will be visible through the transparent cylinder to indicate its position, said transparent cylinder having indicia axially spaced between said groove and said shoulder for indicating the proper position for insertion of said other pipe in accordance with the ambient temperature at the time of installation.
Claim 4
Dependent Claim
147 words
A coupling for connecting two pipes comprising a transparent cylinder which has an integral bore interrupted between its ends by a radially inwardly directed shoulder so that one of said pipes can be inserted into one end of the bore and secured therein in engagement with said shoulder, said bore having adjacent to its other end a radially inwardly opening sealing ring groove, and a seal ring in said groove so that the other of said pipes can be inserted into the other end of the bore in an axially movable and sealed relationship and the end of the second pipe will be visible through the transparent cylinder to indicate its position, said transparent cylinder having indicia axially spaced between said groove and said shoulder for indicating the proper position for insertion of said other pipe in accordance with the ambient temperature at the time of installation.
Claim 5
Dependent Claim
148 words
A coupling for connecting two pipes comprising a transparent cylinder which has an integral bore interrupted between its ends by a radially inwardly directed shoulder so that one of said pipes can be inserted into one end of the bore and secured therein in engagement with said shoulder, said bore having adjacent to its other end a radially inwardly opening sealing ring groove, and a seal ring in said groove so that the other of said pipes can be inserted into the other end of the bore in an axially movable and sealed relationship and the end of the second pipe will be visible through the transparent cylinder to indicate its position, Said groove having a generally rectangular cross-section and said seal ring is an elastomeric member which has a generally C-shape in cross-section, the opening of the C-shape facing in an axially inward direction toward said shoulder.
Claim 6
Dependent Claim
148 words
A coupling for connecting two pipes comprising a transparent cylinder which has an integral bore interrupted between its ends by a radially inwardly directed shoulder so that one of said pipes can be inserted into one end of the bore and secured therein in engagement with said shoulder, said bore having adjacent to its other end a radially inwardly opening sealing ring groove, and a seal ring in said groove so that the other of said pipes can be inserted into the other end of the bore in an axially movable and sealed relationship and the end of the second pipe will be visible through the transparent cylinder to indicate its position, Said groove having a generally rectangular cross-section and said seal ring is an elastomeric member which has a generally C-shape in cross-section, the opening of the C-shape facing in an axially inward direction toward said shoulder.
Claim 7
Dependent Claim
49 words
The coupling that is defined in claim 3, wherein said groove is defined by an annular radially outward projection in the cylinder, said seal ring being visible through the transparent cylinder to allow inspection for proper position of the seal ring before and after insertion of said other pipe.
Claim 8
Dependent Claim
179 words
A coupling for connecting two pipes comprising a transparent cylinder which has an internal bore interrupted between its ends by a radially inwardly directed shoulder so that one of said pipes can be inserted into one end of the bore and secured therein in engagement with said shoulder, said bore having adjacent to its other end a radially outwardly directed seal ring groove defined by an annular radially outward projection in said cylinder, said groove having a generally rectangular cross-section, and a seal in said groove so that the other of said pipes can be inserted into the other end of the bore in an axially movable and sealed relationship, said seal ring being an elastomeric member of generally C-shape in cross-section with the opening of the C-shape facing in an axially inward direction, said transparent cylinder allowing inspection of the seal ring before and after insertion of said other pipe and having indicia axially spaced thereon for indicating the proper position for insertion of said other pipe in accordance with the ambient temperature at the time of insertion.
Claim 9
Dependent Claim
179 words
A coupling for connecting two pipes comprising a transparent cylinder which has an internal bore interrupted between its ends by a radially inwardly directed shoulder so that one of said pipes can be inserted into one end of the bore and secured therein in engagement with said shoulder, said bore having adjacent to its other end a radially outwardly directed seal ring groove defined by an annular radially outward projection in said cylinder, said groove having a generally rectangular cross-section, and a seal in said groove so that the other of said pipes can be inserted into the other end of the bore in an axially movable and sealed relationship, said seal ring being an elastomeric member of generally C-shape in cross-section with the opening of the C-shape facing in an axially inward direction, said transparent cylinder allowing inspection of the seal ring before and after insertion of said other pipe and having indicia axially spaced thereon for indicating the proper position for insertion of said other pipe in accordance with the ambient temperature at the time of insertion.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |