US3811486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic shut-off nozzle responsive to more than one condition in a tank being filled
Assignee: Dover Corp
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Filing: 1972-12-26
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Granted: 1974-05-21
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Expires: 1992-12-26
Abstract
Abstract An automatic shut-off nozzle has a pair of diaphragms with a first diaphragm being responsive to the vapor pressure in the tank which is being filled exceeding a predetermined pressure so as to block communication with a second diaphragm, which is subjected to a partial vacuum, with the tank being filled whereby the second diaphragm moves due to an increase in the partial vacuum acting on said second diaphragm to cause closing of a manually operated valve which stops flow through the nozzle. When the liquid in the tank reaches a predetermined level, the second diaphragm moves due to the partial vacuum acting on said second diaphragm being increased so as to cause the valve to again be closed.
Inventors
- 👤 C Wood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:19
CPC Classifications
B; B67; B67D; B67D7/00; B67D7/06; B67D7/42; B67D7/44; B67D7/46; B67D7/48; B67D7/54; B67D2007/545
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
328 words
An automatic shut-off nozzle comprising a body having an inlet and an outlet, a valve in said body controlling flow of liquid from said inlet to said outlet, manual operated means controlling the operation of said valve, a spout communicating with said outlet, said spout being insertable into a tank through an opening therein to allow the liquid to be dispensed therein, release means movable in one direction to release said manual operated means in response to either of tow conditions existing in the tank and acting on said manual operated means to allow closing of said valve and stoppage of liquid flow, the conditions being build-up of vapor pressure to a predetermined pressure and the liquid in the tank reaching a predetermined level, a first diaphragm communicating with the tank and responsive to the conditions in the tank, throttle valve means responsive to movement of the first diaphragm, a chamber, a second diaphragm forming a wall of said chamber, said second diaphragm having said release means connected thereto, means communicating said chamber with the tank, means to create a partial vacuum in said chamber when liquid is flowing through said body, said throttle valve means controlling said communicating means to regulate the partial vacuum created in said chamber by said creating means, said throttle valve means including a valve member movable in response to movements of said first diaphragm and a seat formed in said communicating means, said first diaphragm having an area several times the area of said valve member, said valve member blocking said communicating means by engaging said seat when said first diaphragm moves in response to one of the conditions existing in the tank so that the partial vacuum in said chamber is increased to cause said second diaphragm to move said release means in the one direction, and said second diaphragm being movable by the other of the conditions existing in the tank to move said release means in the one direction.
Claim 2
Dependent Claim
328 words
An automatic shut-off nozzle comprising a body having an inlet and an outlet, a valve in said body controlling flow of liquid from said inlet to said outlet, manual operated means controlling the operation of said valve, a spout communicating with said outlet, said spout being insertable into a tank through an opening therein to allow the liquid to be dispensed therein, release means movable in one direction to release said manual operated means in response to either of tow conditions existing in the tank and acting on said manual operated means to allow closing of said valve and stoppage of liquid flow, the conditions being build-up of vapor pressure to a predetermined pressure and the liquid in the tank reaching a predetermined level, a first diaphragm communicating with the tank and responsive to the conditions in the tank, throttle valve means responsive to movement of the first diaphragm, a chamber, a second diaphragm forming a wall of said chamber, said second diaphragm having said release means connected thereto, means communicating said chamber with the tank, means to create a partial vacuum in said chamber when liquid is flowing through said body, said throttle valve means controlling said communicating means to regulate the partial vacuum created in said chamber by said creating means, said throttle valve means including a valve member movable in response to movements of said first diaphragm and a seat formed in said communicating means, said first diaphragm having an area several times the area of said valve member, said valve member blocking said communicating means by engaging said seat when said first diaphragm moves in response to one of the conditions existing in the tank so that the partial vacuum in said chamber is increased to cause said second diaphragm to move said release means in the one direction, and said second diaphragm being movable by the other of the conditions existing in the tank to move said release means in the one direction.
Claim 3
Dependent Claim
22 words
The nozzle according to claim 1 including means to connect said valve member of said throttle valve means to said first diaphragm.
Claim 4
Dependent Claim
32 words
The nozzle according to claim 2 in which the direction of motion of Said valve member of said throttle valve means is aligned with the direction of motion of said release means.
Claim 5
Dependent Claim
61 words
The nozzle according to claim 3 in which said chamber has a wall formed with a passage therein, said passage being part of said communicating means, and said valve member having a portion smaller than said passage and disposed in said passage to allow communication between said chamber and the tank when the one condition does not exist in the tank.
Claim 6
Dependent Claim
84 words
The nozzle according to claim 2 in which said communicating means includes a passage, said valve member includes a first portion disposed in said passage of said communicating means and being smaller than said first passage of said communicating means to allow communication between said chamber and the tank when the one condition does not exist in the tank, and said valve member includes a second portion cooperating with said seat to block said communicating means when the one condition exists in the tank.
Claim 7
Dependent Claim
32 words
The nozzle according to claim 1 in which the direction of motion of said valve member of said throttle valve means is aligned with the direction of motion of said release means.
Claim 8
Dependent Claim
61 words
The nozzle according to claim 6 in which said chamber has a wall formed with a passage therein, said passage being part of said communicating means, and said valve member having a portion smaller than said passage and disposed in said passage to allow communication between said chamber and the tank when the one condition does not exist in the tank.
Claim 9
Dependent Claim
61 words
The nozzle according to claim 1 in which said chamber has a wall formed with a passage therein, said passage being part of said communicating means, and said valve member having a portion smaller than said passage and disposed in said passage to allow communication between said chamber and the tank when the one condition does not exist in the tank.
Claim 10
Dependent Claim
83 words
The nozzle according to claim 1 in which said communicating means includes a passage, said valve member includes a first portion disposed in said passage of said communicating means and being smaller then said passage of said communicating means to allow communication between said chamber and the tank when the one condition does not exist in the tank, and said valve member includes a second portion cooperating with said seat to block said communicating means when the one condition exists in the tank.
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) | 1977-05-20 | 1977-11-19 | 1978-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-20 | 1981-11-19 | 1982-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-20 | 1985-11-19 | 1986-05-21 | $7700.00 | Window Closed / Lapsed |