Patent US4039004A successfully refreshed from Google Patents.
US4039004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Backflow valve mounting and sealing device
Assignee: WEST AMERICAN RUBBER Co
•
Filing: 1975-10-14
•
Granted: 1977-08-02
•
Expires: 1995-10-14
Abstract
Abstract A resilient elastomer mounting and sealing device for a backflow valve. The backflow valve is positioned within a pipe fitting and includes a flapper element. The device serves to support the valve within the pipe fitting while sealing the valve relative to the pipe fitting and additionally provides a seat for the flapper element of the valve.
Inventors
- 👤 Ronald K. Luthy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:38
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/03; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7898; Y10T137/7903
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
198 words
A mounting and sealing device for supporting a backflow valve in a pipe fitting, said backflow valve having a cylindrical mounting portion telescopically received within said pipe fitting, with one end of said cylindrical mounting portion serving as a valve seat for a flapper element that is carried by said one end of said mounting portion, and the pipe fitting being formed with circumferential grooves, said mounting and sealing device being of resilient material and comprising: an annular main body that telescopically encompasses the exterior surface of the mounting portion of said valve and fills the space between said exterior portion and the adjoining portion of the pipe fitting; said main body being formed on its exterior periphery with annular ribs that are snugly received by the grooves of said pipe fitting to removably support the mounting portion of said valve within said pipe fitting while forming a seal between said valve mounting portion and the interior of said pipe fitting; and one end of said main body being formed with a radially inwardly extending lip that receives said one end of the mounting portion of the valve so as to form a seat for said flapper element.
Claim 2
Dependent Claim
198 words
A mounting and sealing device for supporting a backflow valve in a pipe fitting, said backflow valve having a cylindrical mounting portion telescopically received within said pipe fitting, with one end of said cylindrical mounting portion serving as a valve seat for a flapper element that is carried by said one end of said mounting portion, and the pipe fitting being formed with circumferential grooves, said mounting and sealing device being of resilient material and comprising: an annular main body that telescopically encompasses the exterior surface of the mounting portion of said valve and fills the space between said exterior portion and the adjoining portion of the pipe fitting; said main body being formed on its exterior periphery with annular ribs that are snugly received by the grooves of said pipe fitting to removably support the mounting portion of said valve within said pipe fitting while forming a seal between said valve mounting portion and the interior of said pipe fitting; and one end of said main body being formed with a radially inwardly extending lip that receives said one end of the mounting portion of the valve so as to form a seat for said flapper element.
Claim 3
Dependent Claim
41 words
A mounting and sealing device as set forth in claim 1 wherein: the end of said main body opposite said lip is formed with a radially inwardly extending flange that abuts the opposite end of the mounting portion of said valve.
Claim 4
Dependent Claim
201 words
A mounting and sealing device for supporting a backflow valve in a pipe fitting, said backflow valve having a cylindrical mounting portion telescopically received within said pipe fitting, with the downstream end of said cylindrical mounting portion serving as a valve seat for a flapper element that is carried by said downstream end of said mounting portion, and the pipe fitting being formed with circumferential grooves, said mounting and sealing device being of resilient material and comprising: an annular main body that telescopically encompasses the exterior surface of the mounting portion of said valve and fills the space between said exterior portion and the adjoining portion of the pipe fitting; said main body being formed on its exterior periphery with annular ribs that are snugly received by the grooves of said pipe fitting to removably support the mounting portion of said valve within said pipe fitting while forming a seal between said valve mounting portion and the interior of said pipe fitting; and the downstream end of said main body being formed with a radially inwardly extending lip that receives said downstream end of the mounting portion of the valve so as to form a resilient seat for said flapper element.
Claim 5
Dependent Claim
201 words
A mounting and sealing device for supporting a backflow valve in a pipe fitting, said backflow valve having a cylindrical mounting portion telescopically received within said pipe fitting, with the downstream end of said cylindrical mounting portion serving as a valve seat for a flapper element that is carried by said downstream end of said mounting portion, and the pipe fitting being formed with circumferential grooves, said mounting and sealing device being of resilient material and comprising: an annular main body that telescopically encompasses the exterior surface of the mounting portion of said valve and fills the space between said exterior portion and the adjoining portion of the pipe fitting; said main body being formed on its exterior periphery with annular ribs that are snugly received by the grooves of said pipe fitting to removably support the mounting portion of said valve within said pipe fitting while forming a seal between said valve mounting portion and the interior of said pipe fitting; and the downstream end of said main body being formed with a radially inwardly extending lip that receives said downstream end of the mounting portion of the valve so as to form a resilient seat for said flapper element.
Claim 6
Dependent Claim
39 words
A mounting and sealing device as set forth in claim 3, wherein: the upstream end of said main body is formed with a radially inwardly extending flange that abuts the upstream end of the mounting portion of said valve.
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) | 1980-08-01 | 1981-01-31 | 1981-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-01 | 1985-01-31 | 1985-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-01 | 1989-01-31 | 1989-08-02 | $7700.00 | Window Closed / Lapsed |