US3941168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid dispensing and vapor recovery system utilizing an injector and a vapor flow control valve
Assignee: Marley Wylain Co LLC
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Filing: 1974-12-19
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Granted: 1976-03-02
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Expires: 1994-12-19
Abstract
Abstract A liquid dispensing and vapor recovery system in which an underground storage tank is connected to a first conduit for delivering a liquid, such as gasoline, to a vehicle gasoline tank or the like under the force of a pump located in the storage tank. A second conduit is connected to the first conduit and to the storage tank for diverting a portion of the gasoline in the first conduit back to the storage tank and an injector is located in the second conduit for forming a reduced pressure zone. A third conduit is connected to the vehicle tank and to the second conduit at the reduced pressure zone for drawing the vapors from the vehicle tank into the second conduit for passage into the storage tank. Valve means are provided which are responsive to the rate of flow of the liquid through the first conduit for regulating the flow of vapor through the third conduit.
Inventors
- 👤 Trueman W. Hiller
- 👤 Klaus D. Jarr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:08
CPC Classifications
B; B67; B67D; B67D7/00; B67D7/04; B67D7/0476; B67D7/0478; B67D7/048; B67D7/0482; B67D7/0484
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
170 words
A liquid dispensing and vapor recovery system comprising storage means for said liquid, first conduit means adapted to connect said storage means to a receptacle, pump means for pumping said liquid from said storage means through said first conduit means and to said receptacle, second conduit means connected to said first conduit means and to said storage means for diverting a portion of said liquid in said first conduit means back to said storage means, means for forming a reduced pressure zone in said second conduit means in response to liquid flow through said second conduit means, third conduit means connected to said second conduit means at said reduced pressure zone and to said receptacle for drawing the vapors from said receptacle into said second conduit means for passage into said storage means, and valve means disposed in said third conduit means for continuously changing the flow rate of vapor through said third conduit means in proportion to changes in the flow rate of liquid through said first conduit means.
Claim 2
Dependent Claim
170 words
A liquid dispensing and vapor recovery system comprising storage means for said liquid, first conduit means adapted to connect said storage means to a receptacle, pump means for pumping said liquid from said storage means through said first conduit means and to said receptacle, second conduit means connected to said first conduit means and to said storage means for diverting a portion of said liquid in said first conduit means back to said storage means, means for forming a reduced pressure zone in said second conduit means in response to liquid flow through said second conduit means, third conduit means connected to said second conduit means at said reduced pressure zone and to said receptacle for drawing the vapors from said receptacle into said second conduit means for passage into said storage means, and valve means disposed in said third conduit means for continuously changing the flow rate of vapor through said third conduit means in proportion to changes in the flow rate of liquid through said first conduit means.
Claim 3
Dependent Claim
26 words
The system of claim 1 wherein said means for forming a reduced pressure zone comprises a nozzle and a venturi disposed in said second conduit means.
Claim 4
Dependent Claim
17 words
The system of claim 1 wherein said vapors mix with said liquid in said second conduit means.
Claim 5
Dependent Claim
41 words
The system of claim 1 further comprising a dispensing device connected to said first conduit means and to said third conduit means for dispensing said liquid from said first conduit means into said receptacle and for receiving vapors from said receptacle.
Claim 6
Dependent Claim
26 words
The system of claim 1 wherein said liquid is fuel, said storage means is an underground storage tank, and said receptacle is a vehicle fuel tank.
Claim 7
Dependent Claim
172 words
A liquid dispensing and vapor recovery system comprising storage means for said liquid, first conduit means adapted to connect said storage means to a receptacle, pump means for pumping said liquid from said storage means through said first conduit means and to said receptacle, second conduit means in open communication with said first conduit means and connected to said storage means for continuously diverting a portion of said liquid in said first conduit means back to said storage means, means for forming a reduced pressure zone in said second conduit means in response to liquid flow through said second conduit means, third conduit means connected to said second conduit means at said reduced pressure zone and to said receptacle for drawing the vapors from said receptacle into said second conduit means for passage into said storage means, and valve means disposed in said third conduit means and responsive to the rate of flow of said liquid through said first conduit means for modulating the flow of vapor through said third conduit means.
Claim 8
Dependent Claim
172 words
A liquid dispensing and vapor recovery system comprising storage means for said liquid, first conduit means adapted to connect said storage means to a receptacle, pump means for pumping said liquid from said storage means through said first conduit means and to said receptacle, second conduit means in open communication with said first conduit means and connected to said storage means for continuously diverting a portion of said liquid in said first conduit means back to said storage means, means for forming a reduced pressure zone in said second conduit means in response to liquid flow through said second conduit means, third conduit means connected to said second conduit means at said reduced pressure zone and to said receptacle for drawing the vapors from said receptacle into said second conduit means for passage into said storage means, and valve means disposed in said third conduit means and responsive to the rate of flow of said liquid through said first conduit means for modulating the flow of vapor through said third conduit means.
Claim 9
Dependent Claim
26 words
The system of claim 6 wherein said means for forming a reduced pressure zone comprises a nozzle and a venturi disposed in said second conduit means.
Claim 10
Dependent Claim
17 words
The system of claim 6 wherein said vapors mix with said liquid in said second conduit means.
Claim 11
Dependent Claim
41 words
The system of claim 6 further comprising a dispensing device connected to said first conduit means and to said third conduit means for dispensing said liquid from said first conduit means into said receptacle and for receiving vapors from said receptacle.
Claim 12
Dependent Claim
26 words
The system of claim 6 wherein said liquid is fuel, said storage means is an underground storage tank, and said receptacle is a vehicle fuel tank.
References Cited (Backward Citations)
US2090734A
Cited
US2356428A
Cited
US2401124A
Cited
US2650003A
Cited
US2919834A
Cited
US3763901A
Cited
US3863687A
Cited
US3826291A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-02 | 1979-09-01 | 1980-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-02 | 1983-09-01 | 1984-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-02 | 1987-09-01 | 1988-03-02 | $7700.00 | Window Closed / Lapsed |