US3770029A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic fuel dispensing nozzle
Assignee: Texaco Inc
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Filing: 1971-09-30
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Granted: 1973-11-06
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Expires: 1991-09-30
Abstract
Abstract An automatic dispensing nozzle for filling a vehicle tank having a control valve automatically responsive both to the rise of fluid around the outlet spout of the nozzle and also to abnormal increase in pressure within the vehicle tank to release a lockout mechanism which effects cut-off of the valve, involving a central, axially movable control pin for controlling a valve lockout mechanism.
Inventors
- 👤 E Mayer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:51
CPC Classifications
B; B67; B67D; B67D7/00; B67D7/06; B67D7/42; B67D7/44; B67D7/46; B67D7/48
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
218 words
In an automatic dispensing nozzle for liquid fuel and the like, wherein control valve (10)for said fluid is mounted upon a lockout plunger (16) which is normally locked in operative position by radially acting locking members (24) held in radially outward locking position by a central, axially extending control pin (26), but which is released Instantaneously to close said valve (10) by axially retracting said control pin (26) to release said locking members (24) radially inwardly, said pin (26) being attached to a flexible diaphragm (34) subject to a vacuum signal to retract said pin (26) thereby permitting said locking members (24) to unlock said lockout plunger (16), the improvement which comprises an expanded portion (28) of said control pin (26) normally residing radially inwardly of said locking members (24) and holding their radially outwardly locking position, said expanding portion (28) terminating in both axial directions therefrom in constricted portions (40, 42), means (58, 60) for transmitting said vacuum signal to one side of said diaphragm (34) to retract said pin (26) to release said locking members (24) and, means for transmitting (58, 60) a positive pressure signal to said surface of the diaphragm (34) to move said diaphragm and said attached control pin (26) in the opposite axial direction, thereby also to release said locking members (24).
Claim 2
Dependent Claim
218 words
In an automatic dispensing nozzle for liquid fuel and the like, wherein control valve (10)for said fluid is mounted upon a lockout plunger (16) which is normally locked in operative position by radially acting locking members (24) held in radially outward locking position by a central, axially extending control pin (26), but which is released Instantaneously to close said valve (10) by axially retracting said control pin (26) to release said locking members (24) radially inwardly, said pin (26) being attached to a flexible diaphragm (34) subject to a vacuum signal to retract said pin (26) thereby permitting said locking members (24) to unlock said lockout plunger (16), the improvement which comprises an expanded portion (28) of said control pin (26) normally residing radially inwardly of said locking members (24) and holding their radially outwardly locking position, said expanding portion (28) terminating in both axial directions therefrom in constricted portions (40, 42), means (58, 60) for transmitting said vacuum signal to one side of said diaphragm (34) to retract said pin (26) to release said locking members (24) and, means for transmitting (58, 60) a positive pressure signal to said surface of the diaphragm (34) to move said diaphragm and said attached control pin (26) in the opposite axial direction, thereby also to release said locking members (24).
Claim 3
Dependent Claim
54 words
An automatic dispensing nozzle as called for in claim 1 wherein said nozzle is adapted to be connected with a vehicle fuel tank in tight or sealing engagement therewith and wherein means is provided for creating said vacuum signal in response to the rise of fluid around the outlet spout of the dispensing nozzle.
Claim 4
Dependent Claim
94 words
An automatic dispensing nozzle as called for in claim 1 wherein said nozzle is adapted to be connected with a vehicle fuel tank in tight or sealing engagement therewith and wherein means is provided for creating said vacuum signal in response to the rise of fluid around the outlet spout of the dispensing nozzle, and wherein conduit means is provided in communication with the interior of the vehicle fuel tank to transmit the ambient pressure therein, as said positive pressure signal when the pressure rises above a predetermined value in said vehicle fuel tank.
Claim 5
Dependent Claim
41 words
An automatic dispensing nozzle as called for in claim 1, wherein said lockout plunger is responsive to the initial vacuum signal caused by the initial rise of fuel about the outlet spout of the nozzle to control an automatic topping-off operation.
Claim 6
Dependent Claim
45 words
An automatic dispensing nozzle as called for in claim 1 wherein said lockout plunger is responsive to the final vacuum signal resulting from the rise of fuel about the outlet spout of the nozzle of the fuel tank at the conclusion of a topping-off operation.
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) | 1976-11-05 | 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 |