US4606672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Constant upstream level gate
Assignee: Individual
•
Filing: 1984-10-31
•
Granted: 1986-08-19
•
Expires: 2004-10-31
Abstract
Abstract An upstream canal flow control device comprising a gate depending down into the flowing stream from a pivotal axis transverse to the stream and an arm extending downstream from the axis and gate containing a ballast to force the gate against stream flow, the ballast adjustable along the arm to cause the gate to retain an upstream water level as a function of the ballast position therealong.
Inventors
- 👤 James R. LeSire
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:55
CPC Classifications
E; E02; E02B; E02B7/00; E02B7/20; E02B7/40
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
99 words
A waterstream gate, for maintaining a desired upstream level, comprising: (a) a pivotal axis transverse to the water stream; (b) a gate depending from said axis directly into the water stream and adapted to move through an arc between a fully closed-off position against the stream bottom and various open positions downstream thereof; (c) an arm extending downstream from said gate and at a fixed angle thereto; and, (d) ballast means slideably attached to said arm for positioning therealong to create a counterforce to balance the force of the water stream against said gate at any desired upstream level.
Claim 2
Dependent Claim
99 words
A waterstream gate, for maintaining a desired upstream level, comprising: (a) a pivotal axis transverse to the water stream; (b) a gate depending from said axis directly into the water stream and adapted to move through an arc between a fully closed-off position against the stream bottom and various open positions downstream thereof; (c) an arm extending downstream from said gate and at a fixed angle thereto; and, (d) ballast means slideably attached to said arm for positioning therealong to create a counterforce to balance the force of the water stream against said gate at any desired upstream level.
Claim 3
Dependent Claim
18 words
The gate of claim 1 wherein said angle between said gate and said arm is a right angle.
Claim 4
Dependent Claim
17 words
The gate of claim 1 including means to support said axis at the edges of the stream.
Claim 5
Dependent Claim
138 words
A waterstream gate, for maintaining a desired upstream level, comprising: (a) a pivotal axis mounted transverse to and above the flow of the stream; (b) a non-floating gate, extending the full depth and the full width of the stream, depending from said axis directly into the water stream and adapted to move through an arc between a fully closed-off position against the stream bottom and various open positions downstream thereof; (c) an arm extending downstream from said axis and at a fixed angle to said gate; and (d) ballast means slideably attached to said arm for positioning therealong to create a counterforce to balance the force of the water stream against said gate at positions between fully closed-off, against stop means anchored in the stream bed below said axis, and downstream open positions at any desired upstream level.
Claim 6
Dependent Claim
138 words
A waterstream gate, for maintaining a desired upstream level, comprising: (a) a pivotal axis mounted transverse to and above the flow of the stream; (b) a non-floating gate, extending the full depth and the full width of the stream, depending from said axis directly into the water stream and adapted to move through an arc between a fully closed-off position against the stream bottom and various open positions downstream thereof; (c) an arm extending downstream from said axis and at a fixed angle to said gate; and (d) ballast means slideably attached to said arm for positioning therealong to create a counterforce to balance the force of the water stream against said gate at positions between fully closed-off, against stop means anchored in the stream bed below said axis, and downstream open positions at any desired upstream level.
Claim 7
Dependent Claim
18 words
The gate of claim 4 wherein said angle between said gate and said arm is a right angle.
Claim 8
Dependent Claim
17 words
The gate of claim 4 including means to support said axis at the edges of the stream.
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) | 1989-08-18 | 1990-02-17 | 1990-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-18 | 1994-02-17 | 1994-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-18 | 1998-02-17 | 1998-08-19 | $7700.00 | Window Closed / Lapsed |