Patent US3934280A successfully refreshed from Google Patents.
US3934280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drain-flushing device
Assignee: Individual
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Filing: 1975-05-21
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Granted: 1976-01-27
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Expires: 1995-05-21
Abstract
Abstract In a preferred embodiment, the cylinder is of substantially large dimensions, such as typically having an inner diameter of about four inches, for the drain compression flushing device, still retaining the conical spout element defining a restricted liquid outlet orifice, and having spaced upwardly from the spout-end of the compression cylinder a circumscribing seating flange angled radially outwardly in a direction toward the handle end such that in an enlarged opening the spout element tends to seat itself firmly to seal while making possible for the orifice to be located far downwardly within space defined by the enlarged drain outlet such as for industrial use and/or for a commode or the like, and such as a large handle.
Inventors
- 👤 Pier Luigi Tancredi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:54
CPC Classifications
E; E03; E03C; E03C1/00; E03C1/12; E03C1/30; E03C1/304; E03C1/308
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
269 words
A drain-flushing device comprising in combination: a cylindrical tubular element having an open end at one end thereof and having a conically restricted end at least on inner surfaces thereof at an opposite other end thereof defining an aperture of predetermined small diameter; a reciprocatable sealed disk mounted sealably within the cylindrical tubular element sealably isolating spaces on each of opposite sides of the reciprocatable sealed disk from one another; shaft means mounted within the cylindrical tubular element secured at one end thereof fixedly to the reciprocatable sealed disk and adapted fo reciprocating the reciprocatable sealed disk and extending at an opposite end thereof through and beyond said open end adapted for reciprocation axially within the cylindrical tubular element; a handle element mounted on a distal end of the shaft means at an end opposite from the attached said reciprocatable sealed disk, the handle element being adapted for manual grasping thereof for the pressing on the shaft means in a direction axially of the shaft means to thereby force liquid through the aperture at elevated pressure from one of the spaces adjacent the aperture; the outer surface of said conically restricted end being terminated at an apex of the conically restricted end as a structure devoid of further projection ending bluntly at the apex and said inner surfaces being at a conical angle of from about 40 degrees to about 50 degrees relative to the side surfaces of the cylindrical walls of the cylindrical tubular element, the improvement being and including a circumscribing radially-outwardly and upwardly flared flange spaced upwardly from and including a lower cylindrical wall circumscribing the
Claim 2
Dependent Claim
269 words
A drain-flushing device comprising in combination: a cylindrical tubular element having an open end at one end thereof and having a conically restricted end at least on inner surfaces thereof at an opposite other end thereof defining an aperture of predetermined small diameter; a reciprocatable sealed disk mounted sealably within the cylindrical tubular element sealably isolating spaces on each of opposite sides of the reciprocatable sealed disk from one another; shaft means mounted within the cylindrical tubular element secured at one end thereof fixedly to the reciprocatable sealed disk and adapted fo reciprocating the reciprocatable sealed disk and extending at an opposite end thereof through and beyond said open end adapted for reciprocation axially within the cylindrical tubular element; a handle element mounted on a distal end of the shaft means at an end opposite from the attached said reciprocatable sealed disk, the handle element being adapted for manual grasping thereof for the pressing on the shaft means in a direction axially of the shaft means to thereby force liquid through the aperture at elevated pressure from one of the spaces adjacent the aperture; the outer surface of said conically restricted end being terminated at an apex of the conically restricted end as a structure devoid of further projection ending bluntly at the apex and said inner surfaces being at a conical angle of from about 40 degrees to about 50 degrees relative to the side surfaces of the cylindrical walls of the cylindrical tubular element, the improvement being and including a circumscribing radially-outwardly and upwardly flared flange spaced upwardly from and including a lower cylindrical wall circumscribing the
Claim 3
Dependent Claim
46 words
A drain-flushing device of claim 1, in which the cylindrical element, the reciprocatable sealed disk, the shaft means, the handle element, and the flared flange comprise a predetermined large mass and bulk strength such that the device is suitable for heavy duty sevice with large drains.
References Cited (Backward Citations)
US2697842A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-26 | 1979-07-28 | 1980-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-26 | 1983-07-28 | 1984-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-26 | 1987-07-28 | 1988-01-27 | $7700.00 | Window Closed / Lapsed |