US4096597A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drain opening device
Assignee: Individual
•
Filing: 1976-09-30
•
Granted: 1978-06-27
•
Expires: 1996-09-30
Abstract
Abstract An apparatus for opening clogged water drains by the force of a high speed water jet. The water is propelled by the manual operation of telescoping two cylinders together thereby reducing their volume. The water-filled cylinders are effectively sealed by the use of flexible plastic membrane.
Inventors
- 👤 Gregory E. Duse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:07
CPC Classifications
E; E03; E03C; E03C1/00; E03C1/12; E03C1/30; E03C1/304; E03C1/308
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
165 words
An apparatus for opening clogged drains comprising: (a) an upper tube having one closed end and one open end; (b) a lower tube fitted coaxially within said upper tube to freely telescope; (c) a flexible plastic bag the open end of which is attached within said lower tube and forming a watertight cavity within said upper tube; (d) a base attached to the exposed end of said lower tube; (e) a flap valve mounted in said base openable resiliently in response to fluid under pressure exerted on opposite sides thereof to permit passage of said fluid under pressure through said base in the direction of the applied pressure, (f) said base having a face normal to the axis of the said coaxial tubes and a recess in said face open to said flap valve; and (g) a separate member of elastomeric material removably fitted into said recess and having a face sloped at an angle of 10° to 20° to the face of said base.
Claim 2
Independent Claim
165 words
An apparatus for opening clogged drains comprising: (a) an upper tube having one closed end and one open end; (b) a lower tube fitted coaxially within said upper tube to freely telescope; (c) a flexible plastic bag the open end of which is attached within said lower tube and forming a watertight cavity within said upper tube; (d) a base attached to the exposed end of said lower tube; (e) a flap valve mounted in said base openable resiliently in response to fluid under pressure exerted on opposite sides thereof to permit passage of said fluid under pressure through said base in the direction of the applied pressure, (f) said base having a face normal to the axis of the said coaxial tubes and a recess in said face open to said flap valve; and (g) a separate member of elastomeric material removably fitted into said recess and having a face sloped at an angle of 10° to 20° to the face of said base.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-06-26 | 1981-12-26 | 1982-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-26 | 1985-12-26 | 1986-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-26 | 1989-12-26 | 1990-06-27 | $7700.00 | Window Closed / Lapsed |