US3751734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drain trap
Assignee: Individual
•
Filing: 1971-05-21
•
Granted: 1973-08-14
•
Expires: 1991-05-21
Abstract
Abstract Disclosed is an improved drain trap for use in plumbing installations characterized by ease of installation and resistance to evaporation of the water contained therein and constructed of a series of concentric, coaxial cylindrical members in telescoped relationship to each other thereby providing a tortuous flow drain path, an enlarged water reservoir and an easily cleaned sediment trap.
Inventors
- 👤 R Lumadue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:31
CPC Classifications
E; E03; E03C; E03C1/00; E03C1/12; E03C1/28; E03C1/29
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
244 words
A drain trap comprising a generally cylindrical hollow housing assembly located concentrically within a main drain pipe, said housing assembly being of a given length and a given diameter with a closed bottom acting as a sediment trap and water reservoir, said housing assembly further comprising an open top with screw threads adjacent said top and formed on the interior surface of said housing Assembly, flange means protruding outwardly from the side wall of said housing assembly for supporting a waterproof plug between said drain top and its site of installation, and side wall fluid passage means through the side wall of said housing assembly, and a generally cylindrical removable insert located concentrically within said housing assembly, said insert having an upper end, connecting flange means on said upper end for attachment with a second drain pipe, a lower unobstructed end, a longitudinal fluid passage means between said ends, and a length less than said given length and a diameter less than said given diameter, said removable insert being adapted to be positioned within said housing assembly and attached to said screw threads by mating screw threads adjacent the upper end of said removable insert whereby a fluid drain trap passage is defined sequentially through said insert upper end, said longitudinal passage means, around said insert lower end, through the space between the interior of said cylindrical housing assembly and the exterior of said cylindrical removable insert, and through said side wall passage means.
Claim 2
Dependent Claim
244 words
A drain trap comprising a generally cylindrical hollow housing assembly located concentrically within a main drain pipe, said housing assembly being of a given length and a given diameter with a closed bottom acting as a sediment trap and water reservoir, said housing assembly further comprising an open top with screw threads adjacent said top and formed on the interior surface of said housing Assembly, flange means protruding outwardly from the side wall of said housing assembly for supporting a waterproof plug between said drain top and its site of installation, and side wall fluid passage means through the side wall of said housing assembly, and a generally cylindrical removable insert located concentrically within said housing assembly, said insert having an upper end, connecting flange means on said upper end for attachment with a second drain pipe, a lower unobstructed end, a longitudinal fluid passage means between said ends, and a length less than said given length and a diameter less than said given diameter, said removable insert being adapted to be positioned within said housing assembly and attached to said screw threads by mating screw threads adjacent the upper end of said removable insert whereby a fluid drain trap passage is defined sequentially through said insert upper end, said longitudinal passage means, around said insert lower end, through the space between the interior of said cylindrical housing assembly and the exterior of said cylindrical removable insert, and through said side wall passage means.
Claim 3
Dependent Claim
26 words
The drain trap of claim 1, wherein said removable insert has a web spaced from said connecting flange means with said mating screw threads formed thereon.
Claim 4
Dependent Claim
69 words
The drain trap of claim 2 wherein said web with screw threads thereon has a portion with a diameter that is substantially the diameter of said housing assembly and has a gasket seal surface facing a corresponding gasket seal surface on the top of said housing assembly whereby a gasket may be sealingly engaged by said gasket seal surfaces when said removable insert is attached to said housing assembly.
Claim 5
Dependent Claim
24 words
The drain trap of claim 1 wherein said removable insert has strainer web means adjacent said upper end transverse to said longitudinal passage means.
Claim 6
Dependent Claim
24 words
The drain trap of claim 4 wherein said strainer web means is spaced from said insert upper end and has strainer attaching means thereon.
Claim 7
Dependent Claim
61 words
The drain trap of claim 5 wherein the top surface of said housing assembly and the upper surface of said removable insert are in the same plane when said drain trap is assembled to provide a gasket sealing surface for a gasket that may be sealingly engaged between said gasket sealing surface and a strainer attached to said strainer attaching means.
Claim 8
Dependent Claim
26 words
The drain trap of claim 1 wherein said removable insert has a converging seating surface adjacent said upper end adapted to receive a resilient sealing plug.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |