US3916945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Float operated valve
Assignee: Individual
•
Filing: 1974-05-23
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Granted: 1975-11-04
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Expires: 1994-05-23
Abstract
Abstract A pivotally mounted valve for closing or exposing a conduit end through which a liquid moves either from or into said conduit when the valve is in an open position. The float which is responsive to a liquid level within a receptacle with which said conduit end communicates is connected through a parallelogram and bellcrank linkage arrangement to the valve for opening or closing the valve as the liquid level rises or falls.
Inventors
- 👤 David F Bennett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:19
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/18; F16K31/20; F16K31/24; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7358; Y10T137/7439; Y10T137/7475; Y10T137/7485
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
201 words
A float operated valve comprising a conduit having an open end defining a valve seat, a valve, means swingably supporting said valve for movement into and out of engagement with said valve seat, a liquid level responsive float, means including a parallelogram linkage system connecting said float to the valve whereby an up or down movement of the float will produce a swinging movement of the valve into or out of engagement with said valve seat, said parallelogram linkage system including a pair of rigid links, means pivotally supporting corresponding ends of said links on said conduit, means connected to said float and to which the opposite ends of said links are pivotally connected in spaced apart relation to one another such that said links are disposed parallel to one another, one of said links comprising an arm of a bellcrank, said means swingably supporting the valve including a second bellcrank having one arm connected to and supporting the valve, and a rod connecting the other arm of the first mentioned bellcrank to the other arm of said second bellcrank for causing said bellcranks to swing in unison about parallel axes in response to up and down movement of the float.
Claim 2
Dependent Claim
201 words
A float operated valve comprising a conduit having an open end defining a valve seat, a valve, means swingably supporting said valve for movement into and out of engagement with said valve seat, a liquid level responsive float, means including a parallelogram linkage system connecting said float to the valve whereby an up or down movement of the float will produce a swinging movement of the valve into or out of engagement with said valve seat, said parallelogram linkage system including a pair of rigid links, means pivotally supporting corresponding ends of said links on said conduit, means connected to said float and to which the opposite ends of said links are pivotally connected in spaced apart relation to one another such that said links are disposed parallel to one another, one of said links comprising an arm of a bellcrank, said means swingably supporting the valve including a second bellcrank having one arm connected to and supporting the valve, and a rod connecting the other arm of the first mentioned bellcrank to the other arm of said second bellcrank for causing said bellcranks to swing in unison about parallel axes in response to up and down movement of the float.
Claim 3
Dependent Claim
48 words
A float operated valve as in claim 1, an arm fixed to and extending from the distal end of the last mentioned arm of said first mentioned bellcrank, and a counterweight supported by said arm and disposed beyond said second bellcrank in the closed position of the valve.
Claim 4
Dependent Claim
53 words
A flat operated valve as in claim 2, said counterweight being supported to swing across a vertical plane intersecting the axis of the second bellcrank during movement of the valve between a closed and open position to assist in moving and maintaining the valve in either a fully closed or fully open position.
Claim 5
Dependent Claim
51 words
A float operated valve as in claim 1, a rigid arm fixed to and extending from the distal end of the last mentioned arm of the second bellcrank and in a direction away from said first mentioned bellcrank, and a weight secured to the outer end of said last mentioned arm.
Claim 6
Dependent Claim
70 words
A float operated valve as in claim 1, and a counterweight supported on the distal end of the last mentioned arm of the second bellcrank for swinging movement across a vertical plane intersecting the pivot axis of the second bellcrank, during swinging movement of the valve between an open and closed position for cooperating with the float in maintaining the valve in either a fully open or fully closed position.
Claim 7
Dependent Claim
31 words
A float operated valve as in claim 2, said valve comprising a plug valve and being receivable in said open end of the conduit in a closed position of the 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) | 1978-11-03 | 1979-05-05 | 1979-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-03 | 1983-05-05 | 1983-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-03 | 1987-05-05 | 1987-11-04 | $7700.00 | Window Closed / Lapsed |