Patent US3913633A successfully refreshed from Google Patents.
US3913633A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid dispensing and vapor recovery system
Assignee: Marley Wylain Co LLC
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Filing: 1974-10-21
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Granted: 1975-10-21
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Expires: 1994-10-21
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 disposed 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 while forming a reduced pressure zone in the second conduit. A recovery vessel is connected to the vehicle tank for receiving the vapors from the latter tank and separating same into relatively heavy and relatively light portions. The heavy vapors are passed directly into the storage tank and the light vapors are drawn into the second conduit and are partially absorbed by the gasoline flowing in the latter conduit before being passed into the storage tank.
Inventors
- 👤 Trueman W Hiller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:39
CPC Classifications
B; B67; B67D; B67D7/00; B67D7/04; B67D7/0476; B67D7/0478; B67D7/048; B67D7/0482; B67D7/0484
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
176 words
A liquid dispensing and vapor recovery system comprising storage means for said liquid, first conduit means adapted to connect said storage means to receptacle, and pumping means for pumping said liquid from said storage means through said first conduit means and to said receptacle, wherein the improvement comprises 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, a recovery vessel for receiving the vapors from said receptacle and separating said vapors into a relatively light portion and a relatively heavy portion, and means connecting said vessel to said reduced pressure zone for drawing the relatively light vapors from said vessel through said second conduit means for passage into said storage means, said recovery vessel being directly connected to said storage means for directly passing said relatively heavy vapors into said storage means.
Claim 2
Dependent Claim
176 words
A liquid dispensing and vapor recovery system comprising storage means for said liquid, first conduit means adapted to connect said storage means to receptacle, and pumping means for pumping said liquid from said storage means through said first conduit means and to said receptacle, wherein the improvement comprises 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, a recovery vessel for receiving the vapors from said receptacle and separating said vapors into a relatively light portion and a relatively heavy portion, and means connecting said vessel to said reduced pressure zone for drawing the relatively light vapors from said vessel through said second conduit means for passage into said storage means, said recovery vessel being directly connected to said storage means for directly passing said relatively heavy vapors into said storage means.
Claim 3
Dependent Claim
26 words
The improvement 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
19 words
The improvement of claim 1 wherein said relatively light vapors mix with said liquid in said second conduit means.
Claim 5
Dependent Claim
39 words
The improvement of claim 1 further comprising a dispensing device connected to said first conduit means for dispensing said liquid from said first conduit means into said receptacle and connected to said vessel for drawing vapors from said receptacle.
Claim 6
Dependent Claim
26 words
The improvement 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
17 words
The improvement of claim 1 wherein said vessel is adapted to separate said Vapors by cyclone separation.
Claim 8
Dependent Claim
22 words
The improvement of claim 1 wherein said vessel includes means for creating a relatively high velocity draw of vapors into said vessel.
Claim 9
Dependent Claim
41 words
The improvement of claim 1 wherein said second conduit means is in open communication with said first conduit means and said storage means for continuously diverting a portion of said liquid in said first conduit means back to said storage means.
Claim 10
Dependent Claim
50 words
The improvement of claim 1 further comprising condenser means having an inlet connected to said recovery vessel and an outlet connected to said second conduit means, said condenser adapted to receive vapors from said recovery vessel, condense said vapors into liquid, and pass said liquid to said second conduit means.
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) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |