US3870067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dish washing machine drain unit
Assignee: G S BLAKESLEE CO
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Filing: 1973-11-19
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Granted: 1975-03-11
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Expires: 1993-11-19
Abstract
Abstract The drain unit housing has a bottom wall with a drain opening therein. A vertical sleeve member, secured at its lower end in the drain opening, presents an interior cylindrical surface and has at least one drain port in the side thereof. A vertical flowcontrol member extends downwardly into the sleeve member and has a bottom end. Seal means are carried by the flow-control member adjacent the bottom end thereof and have sealing engagement with the interior cylindrical surface of the sleeve member. The flowcontrol member is vertically movable between a first position wherein the bottom end thereof and the seal means are disposed below the drain port for closing the latter and a second position wherein the bottom end thereof and the seal means are substantially disposed above the drain port for opening the latter.
Inventors
- 👤 Casimer Janiszewski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:27
CPC Classifications
E; E03; E03C; E03C1/00; E03C1/12; E03C1/22; E03C1/23; E03C1/232; Y; Y10; Y10T; Y10T137/00; Y10T137/4238; Y10T137/4245; Y10T137/4273; Y10T137/8593; Y10T137/86348
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
215 words
A drain unit comprising a housing having side walls and a bottom wall, a drain opening provided in said bottom wall, a vertical sleeve member secured at its lower end in said drain opening and presenting an interior cylindrical surface, said sleeve member having at least one drain port in the side thereof with said drain port presenting a sharp lower inner edge, a vertical tubular stand pipe extending downwardly into said sleeve member and having a bottom end, seal means carried by said stand pipe adjacent said bottom end thereof and having sealing engagement with said interior cylindrical surface of said sleeve member, said stand pipe being vertically movable between a first position wherein said bottom end thereof and said seal means are disposed below said drain port for closing the latter and a second position wherein said bottom end thereof and said seal means are substantially disposed above said drain port for opening the latter, and said bottom end of said stand pipe presenting a sharp outer circumferential edge which upon movement of said stand pipe from said second position to said first position cooperates with said drain port edge in breaking up solid foreign materials extending through said drain port whereby to prevent such solid foreign materials from affecting said seal means.
Claim 2
Dependent Claim
215 words
A drain unit comprising a housing having side walls and a bottom wall, a drain opening provided in said bottom wall, a vertical sleeve member secured at its lower end in said drain opening and presenting an interior cylindrical surface, said sleeve member having at least one drain port in the side thereof with said drain port presenting a sharp lower inner edge, a vertical tubular stand pipe extending downwardly into said sleeve member and having a bottom end, seal means carried by said stand pipe adjacent said bottom end thereof and having sealing engagement with said interior cylindrical surface of said sleeve member, said stand pipe being vertically movable between a first position wherein said bottom end thereof and said seal means are disposed below said drain port for closing the latter and a second position wherein said bottom end thereof and said seal means are substantially disposed above said drain port for opening the latter, and said bottom end of said stand pipe presenting a sharp outer circumferential edge which upon movement of said stand pipe from said second position to said first position cooperates with said drain port edge in breaking up solid foreign materials extending through said drain port whereby to prevent such solid foreign materials from affecting said seal means.
Claim 3
Dependent Claim
215 words
A drain unit comprising a housing having side walls and a bottom wall, a drain opening provided in said bottom wall, a vertical sleeve member secured at its lower end in said drain opening and presenting an interior cylindrical surface, said sleeve member having at least one drain port in the side thereof with said drain port presenting a sharp lower inner edge, a vertical tubular stand pipe extending downwardly into said sleeve member and having a bottom end, seal means carried by said stand pipe adjacent said bottom end thereof and having sealing engagement with said interior cylindrical surface of said sleeve member, said stand pipe being vertically movable between a first position wherein said bottom end thereof and said seal means are disposed below said drain port for closing the latter and a second position wherein said bottom end thereof and said seal means are substantially disposed above said drain port for opening the latter, and said bottom end of said stand pipe presenting a sharp outer circumferential edge which upon movement of said stand pipe from said second position to said first position cooperates with said drain port edge in breaking up solid foreign materials extending through said drain port whereby to prevent such solid foreign materials from affecting said seal means.
Claim 4
Dependent Claim
215 words
A drain unit comprising a housing having side walls and a bottom wall, a drain opening provided in said bottom wall, a vertical sleeve member secured at its lower end in said drain opening and presenting an interior cylindrical surface, said sleeve member having at least one drain port in the side thereof with said drain port presenting a sharp lower inner edge, a vertical tubular stand pipe extending downwardly into said sleeve member and having a bottom end, seal means carried by said stand pipe adjacent said bottom end thereof and having sealing engagement with said interior cylindrical surface of said sleeve member, said stand pipe being vertically movable between a first position wherein said bottom end thereof and said seal means are disposed below said drain port for closing the latter and a second position wherein said bottom end thereof and said seal means are substantially disposed above said drain port for opening the latter, and said bottom end of said stand pipe presenting a sharp outer circumferential edge which upon movement of said stand pipe from said second position to said first position cooperates with said drain port edge in breaking up solid foreign materials extending through said drain port whereby to prevent such solid foreign materials from affecting said seal means.
Claim 5
Dependent Claim
23 words
The drain unit of claim 1 including manually-operable means for effecting vertical movement of said stand pipe between said first and second positions.
Claim 6
Dependent Claim
35 words
The drain unit of claim 1 including at least one circumferential groove formed in said stand pipe adjacent said bottom end thereof, and wherein said seal means comprises a seal ring carried in said groove.
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) | 1978-03-10 | 1978-09-09 | 1979-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-10 | 1982-09-09 | 1983-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-10 | 1986-09-09 | 1987-03-11 | $7700.00 | Window Closed / Lapsed |