US3741675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-priming centrifugal pump with automatic air release valve
Assignee: Gorman Rupp Co
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Filing: 1971-02-22
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Granted: 1973-06-26
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Expires: 1991-02-22
Abstract
Abstract An automatic air release valve is connected to the discharge side of a self-priming centrifugal pump for venting air from the pumping system during the priming cycle. The valve automatically closes upon completion of the priming cycle to prevent venting of liquid during the pumping cycle. A flow responsive actuator maintains the valve closed.
Inventors
- 👤 R Porter
- 👤 Farlin S Mc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:05
CPC Classifications
F; F04; F04D; F04D9/00; F04D9/004; F04D9/006; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2579; Y10T137/2587
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
172 words
In combination with a pump having inlet means and outlet means, an air release valve assembly comprising: a. a chamber; b. said chamber having an outlet port; c. chamber inlet means communicating said chamber with said pump outlet means; d. valving means including; 1. a valve seat in said chamber surrounding said outlet port; 2. a valve member movably supported in said chamber; and, 3. biasing means urging said valve member toward an open position spaced from said seat; e. said valving means having a closed position wherein said valve member is in engagement with said seat to block fluid flow through said outlet port; f. said chamber inlet means directing pump effluent into said chamber along a flow path for impingement on said valve member to create a pressure force on said valve member urging said valve member toward said closed position; and, g. actuator means associated with said valve member for moving said valve member to said closed position in response to liquid flow conditions through said pump outlet means.
Claim 2
Dependent Claim
172 words
In combination with a pump having inlet means and outlet means, an air release valve assembly comprising: a. a chamber; b. said chamber having an outlet port; c. chamber inlet means communicating said chamber with said pump outlet means; d. valving means including; 1. a valve seat in said chamber surrounding said outlet port; 2. a valve member movably supported in said chamber; and, 3. biasing means urging said valve member toward an open position spaced from said seat; e. said valving means having a closed position wherein said valve member is in engagement with said seat to block fluid flow through said outlet port; f. said chamber inlet means directing pump effluent into said chamber along a flow path for impingement on said valve member to create a pressure force on said valve member urging said valve member toward said closed position; and, g. actuator means associated with said valve member for moving said valve member to said closed position in response to liquid flow conditions through said pump outlet means.
Claim 3
Dependent Claim
9 words
a valve member movably supported in said chamber; and,
Claim 4
Dependent Claim
9 words
a valve member movably supported in said chamber; and,
Claim 5
Dependent Claim
44 words
A pump as claimed in claim 1 wherein said actuator means comprises an electrically energized actuator element, a control switch in circuit relation with said actuator element, and means for actuating said control switch in response to flow conditions in said pump outlet means.
Claim 6
Dependent Claim
26 words
means defining a valve inlet opening for directing pump effluent into said chamber substantially tangentially along said wall portion to create vorticular flow in said chamber;
Claim 7
Dependent Claim
26 words
means defining a valve inlet opening for directing pump effluent into said chamber substantially tangentially along said wall portion to create vorticular flow in said chamber;
Claim 8
Dependent Claim
8 words
an axial valve outlet opening from said chamber;
Claim 9
Dependent Claim
8 words
an axial valve outlet opening from said chamber;
Claim 10
Dependent Claim
38 words
A pump as claimed in claim 2 wherein said pump outlet means includes a check valve having means movable between open and closed positions, said control switch being operated in response to movement of said check valve means.
Claim 11
Dependent Claim
107 words
biasing means urging said valve member toward an open position spaced from said seat; e. said valving means having a closed position wherein said valve member is in engagement with said seat to block fluid flow through said outlet port; f. said chamber inlet means directing pump effluent into said chamber along a flow path for impingement on said valve member to create a pressure force on said valve member urging said valve member toward said closed position; and, g. actuator means associated with said valve member for moving said valve member to said closed position in response to liquid flow conditions through said pump outlet means.
Claim 12
Dependent Claim
107 words
biasing means urging said valve member toward an open position spaced from said seat; e. said valving means having a closed position wherein said valve member is in engagement with said seat to block fluid flow through said outlet port; f. said chamber inlet means directing pump effluent into said chamber along a flow path for impingement on said valve member to create a pressure force on said valve member urging said valve member toward said closed position; and, g. actuator means associated with said valve member for moving said valve member to said closed position in response to liquid flow conditions through said pump outlet means.
Claim 13
Dependent Claim
31 words
The pump claimed in claim 2 wherein said means for actuating said control switch includes a member which is mOvable in proportion to pressure of liquid in said pump outlet means.
Claim 14
Dependent Claim
7 words
a valve seat surrounding said valve chamber;
Claim 15
Dependent Claim
7 words
a valve seat surrounding said valve chamber;
Claim 16
Dependent Claim
93 words
In combination: a. pump means operable through a priming cycle and a pumping cycle, said pump means including an inlet opening and an outlet opening; b. discharge valve means connected to said outlet opening for permitting fluid flow therethrough during said pumping cycle and for blocking fluid flow therethrough during said priming cycle; c. air release valve means connected between said pump outlet opening and said discharge valve means for permitting fluid flow therethrough during said priming cycle and blocking fluid flow therethrough during said pumping cycle, said air release valve means comprising;
Claim 17
Dependent Claim
93 words
In combination: a. pump means operable through a priming cycle and a pumping cycle, said pump means including an inlet opening and an outlet opening; b. discharge valve means connected to said outlet opening for permitting fluid flow therethrough during said pumping cycle and for blocking fluid flow therethrough during said priming cycle; c. air release valve means connected between said pump outlet opening and said discharge valve means for permitting fluid flow therethrough during said priming cycle and blocking fluid flow therethrough during said pumping cycle, said air release valve means comprising;
Claim 18
Dependent Claim
86 words
a valving member supported by said housing for movement toward and away from said valve seat, said valving member being biased away from said seat and including a surface portion impinged upon by vorticular flow of pump effluent in said chamber which moves said valving member toward said valve seat; and, d. an actuator for urging said valving member toward engagement with said seat in response to sensed pump outlet liquid conditions whereby when said pump means is primed said air release valve is maintained closed.
Claim 19
Dependent Claim
86 words
a valving member supported by said housing for movement toward and away from said valve seat, said valving member being biased away from said seat and including a surface portion impinged upon by vorticular flow of pump effluent in said chamber which moves said valving member toward said valve seat; and, d. an actuator for urging said valving member toward engagement with said seat in response to sensed pump outlet liquid conditions whereby when said pump means is primed said air release valve is maintained closed.
Claim 20
Dependent Claim
43 words
The combination claimed in claim 5 wherein said discharge valve means comprises a check valve member which opens only during said pumping cycle, and means for operating said actuator means in response to movement of said check valve member toward an open position.
Claim 21
Dependent Claim
55 words
The combination claimed in claim 6 wherein said actuator means is electrically energized through a control circuit and said means for operating said actuator means comprises a control switch actuated by movement of a part connected to said check valve member away from a position corresponding to the closed position of said check valve member.
Claim 22
Dependent Claim
42 words
The combination claimed in claim 7 wherein said discharge valve means further comprises a pivot shaft supporting said check valve member for pivotal movement between its open and closed positions, said switch actuating part connected to said pivot shaft for movement therewith.
Claim 23
Dependent Claim
35 words
The combination claimed in claim 8 wherein said control switch comprises a mercury switch and said part comprises a bracket supporting said mercury switch for tipping movement relative to horizontal when said pivot shaft rotates.
Claim 24
Dependent Claim
56 words
The combination claimed in claim 7 wherein said discharge valve means further comprises a pivot shaft supporting said check valve member for pivotal movement, said switch actuating part connected to said pivot shaft and movable therewith to engage a switch operating lever when said valve member has moved a predetermined amount away from said closed position.
Claim 25
Dependent Claim
42 words
The combination claimed in claim 5 further including control means for operating said actuator, said control means comprising at least one control member which is movable in response to changes in pressure of liquid in the vicinity of said pump outlet opening.
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) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |