US3770028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anti-polluting filling and vapor recovery system
Assignee: Individual
•
Filing: 1972-01-26
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Granted: 1973-11-06
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Expires: 1992-01-26
Abstract
Abstract A filling and vapor recovery system, adapted for use during the filling of underground gasoline storage tanks, comprises concentric conduits extending downwardly from ground level to communicate with the tank''s chamber. The inner conduit is a fill tube terminating at its upper, inlet end at a removable fill cap and defines a cylindrical vapor passage with the outer conduit. The upper end of the outer conduit has a tee-fitting attached thereto having a check valve mounted at its outlet. When the tank is filled with gasoline from a delivery truck, through the fill tube, the outlet of the fitting is attached to a return hose which automatically opens the valve to communicate gasoline vapors to the truck from the tank.
Inventors
- 👤 M Madden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:32
CPC Classifications
B; B67; B67D; B67D7/00; B67D7/04; B67D7/0476; B67D7/0478; B65; B65D; B65D90/00; B65D90/22; B65D90/30
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
190 words
A combined filling, venting and dispensing system in combination with a gasoline storage tank defining a chamber therein, said system comprising an inner conduit having an inlet and extending downwardly into said tank to terminate at an outlet positioned adjacent to a bottom of said chamber, an outer conduit extending downwardly to said tank in surrounding relationship with said inner conduit to define an annular first passage therebetween communicating with an upper portion of said chamber at its lower, inlet end, a joint connection, attached to upper ends of both said inner and outer conduits, having means defining a second passage communicating with said first passage, said second passage terminating at an outlet positioned adjacent to the inlet to said inner conduit and check valve means for normally closing the outlet of said second passage and for opening automatically under ambient pressure when gas pressure in said chamber, as sensed at the inlet to said first passage, falls below a predetermined level during dispensing of gasoline from said storage tank and said check valve means being openable for venting said storage tank during filling thereof via said first passage means.
Claim 2
Dependent Claim
190 words
A combined filling, venting and dispensing system in combination with a gasoline storage tank defining a chamber therein, said system comprising an inner conduit having an inlet and extending downwardly into said tank to terminate at an outlet positioned adjacent to a bottom of said chamber, an outer conduit extending downwardly to said tank in surrounding relationship with said inner conduit to define an annular first passage therebetween communicating with an upper portion of said chamber at its lower, inlet end, a joint connection, attached to upper ends of both said inner and outer conduits, having means defining a second passage communicating with said first passage, said second passage terminating at an outlet positioned adjacent to the inlet to said inner conduit and check valve means for normally closing the outlet of said second passage and for opening automatically under ambient pressure when gas pressure in said chamber, as sensed at the inlet to said first passage, falls below a predetermined level during dispensing of gasoline from said storage tank and said check valve means being openable for venting said storage tank during filling thereof via said first passage means.
Claim 3
Dependent Claim
27 words
The invention of claim 1 wherein said valve means is slidably mounted in said joint connection and comprises an annular seal normally seated on an annular flange.
Claim 4
Dependent Claim
37 words
The invention of claim 2 wherein said annular flange is formed on an adapter removably attached to said joint connection, said adapter further comprising an annular recess formed therearound adapted for attachment to a quick disconnect coupling.
Claim 5
Dependent Claim
34 words
The invention of claim 3 further comprising an annular fitting attached on said joint connection, the stem of said valve means reciprocally mounted in said fitting and said adapter removably attached to said fitting.
Claim 6
Dependent Claim
18 words
The invention of claim 1 further comprising a removable cap normally closing the outlet of said second passage.
Claim 7
Dependent Claim
32 words
The invention of claim 1 wherein said joint connection further comprises means defining an enlarged chamber therein, substantially circumferentially about said inner conduit, at the juncture of said first and second passages.
Claim 8
Dependent Claim
49 words
The invention of claim 1 wherein the inlet to said inner conduit has a radial flange formed thereon and secured to a neck portion of said joint connection, and further comprising a removable cap normally attached to said neck portion to normally close the inlet to said inner conduit.
Claim 9
Dependent Claim
31 words
The invention of claim 1 wherein the outlet of said second passage has a cross sectional area substantially less than the cross sectional area of the inlet to said inner pipe.
Claim 10
Dependent Claim
33 words
The invention of claIm 1 wherein said inner conduit comprises a thin-walled tube and said outer conduit comprises a heavy duty pipe having a substantially greater wall thickness than that of said tube.
Claim 11
Dependent Claim
43 words
The invention of claim 1 further comprising means, including a pump, for selectively pumping gasoline out of said tank and sensing means operatively connected to said pump for automatically deactivating said pump when the pressure in said chamber falls below a predetermined level.
Claim 12
Dependent Claim
18 words
The invention of claim 10 wherein said sensing means comprises a pressure sensitive switch mounted in said chamber.
References Cited (Backward Citations)
US3604594A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |