US4082122A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Closed fuel system with vacuum assist
Assignee: Texaco Inc
•
Filing: 1976-10-19
•
Granted: 1978-04-04
•
Expires: 1996-10-19
Abstract
Abstract A balanced system for transferring a volatile liquid fuel into a tank therefor, while avoiding passage of fuel vapors into the atmosphere. Vacuum assist means is further provided to assure a tight fit between a removable fuel dispensing nozzle and the tank filler tube.
Inventors
- 👤 Dean C. McGahey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:28
CPC Classifications
B; B67; B67D; B67D7/00; B67D7/04; B67D7/0476; B67D7/0478; B67D7/048; B67D7/0482
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
154 words
In a closed fuel system for conducting vaporizable liquid fuel from a source thereof including a storage tank, into a receiving fuel tank having a filler pipe, and for concurrently conducting a stream of vapor from said receiving tank to said storage tank during a fuel transfer operation, whereby to stabilize the closed system, a fuel dispensing nozzle removably connected with said tank filler pipe, a hydraulic motor having an inlet communicated with said fuel storage tank to receive a stream of liquid fuel therefrom, and having a discharge port communicated with said dispensing nozzle, a vapor pump having an inlet port communicated with said fuel receiving tank to receive vapors displaced therefrom as liquid fuel enters said receiving tank, and having a discharge port communicated with said storage tank, and a valved passage means communicated with said pump inlet and discharge ports respectively to permit a controlled vaporous flow through said passage means.
Claim 2
Dependent Claim
154 words
In a closed fuel system for conducting vaporizable liquid fuel from a source thereof including a storage tank, into a receiving fuel tank having a filler pipe, and for concurrently conducting a stream of vapor from said receiving tank to said storage tank during a fuel transfer operation, whereby to stabilize the closed system, a fuel dispensing nozzle removably connected with said tank filler pipe, a hydraulic motor having an inlet communicated with said fuel storage tank to receive a stream of liquid fuel therefrom, and having a discharge port communicated with said dispensing nozzle, a vapor pump having an inlet port communicated with said fuel receiving tank to receive vapors displaced therefrom as liquid fuel enters said receiving tank, and having a discharge port communicated with said storage tank, and a valved passage means communicated with said pump inlet and discharge ports respectively to permit a controlled vaporous flow through said passage means.
Claim 3
Dependent Claim
38 words
In the system as defined in claim 1, including a resilient sealing element depending from said dispensing nozzle defining a flexible walled closed chamber when said nozzle is disposed in sealing engagement with said receiving tank filler pipe.
Claim 4
Dependent Claim
20 words
In the system as defined in claim 2, wherein said vapor pump inlet is communicated with said flexible walled chamber.
Claim 5
Dependent Claim
34 words
In the system as defined in claim 1, wherein said bypass conduit includes check valve means therein to regulate vapor flow through said conduit means in response to a pressure condition within the system.
Claim 6
Dependent Claim
38 words
In the system as defined in claim 4, including at least two valve means disposed within said bypass conduit, each valve being operable to regulate a flow of fluid passing through each of said valves in opposite directions.
Claim 7
Dependent Claim
42 words
In the system as defined in claim 4, wherein said bypass conduit includes automatic valve means disposed therein being automatically operable in response to a pressure condition within the system to regulate the flow of fluid passing through said bypass conduit means.
Claim 8
Dependent Claim
34 words
In the system as defined in claim 6, wherein said valve means is operable in response to a predetermined pressure variation at the pump inlet port to regulate vapor flow passing through the pump.
Claim 9
Dependent Claim
88 words
Method for avoiding vapor emissions from a fuel system which passes a volatile liquid from a storage tank therefor, to a receiving tank, and which includes a dispensing nozzle adapted to engage and register in said receiving tank, which method includes the steps of; sequentially passing a stream of said volatile liquid through a hydraulic motor at said receiving tank, concurrently introducing a flow of vapor from said receiving tank to a vapor pump, and connecting said vapor pump to said hydraulic motor whereby to drive said pump.
Claim 10
Dependent Claim
88 words
Method for avoiding vapor emissions from a fuel system which passes a volatile liquid from a storage tank therefor, to a receiving tank, and which includes a dispensing nozzle adapted to engage and register in said receiving tank, which method includes the steps of; sequentially passing a stream of said volatile liquid through a hydraulic motor at said receiving tank, concurrently introducing a flow of vapor from said receiving tank to a vapor pump, and connecting said vapor pump to said hydraulic motor whereby to drive said pump.
Claim 11
Dependent Claim
25 words
In the method as defined in claim 8, including the step of bypassing at least a part of said vapor flow around said vapor pump.
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) | 1981-04-03 | 1981-10-03 | 1982-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-03 | 1985-10-03 | 1986-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-03 | 1989-10-03 | 1990-04-04 | $7700.00 | Window Closed / Lapsed |