US3823752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid dispensing nozzle of the automatic shut-off type
Assignee: Dover Corp
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Filing: 1972-12-26
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Granted: 1974-07-16
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Expires: 1992-12-26
Abstract
Abstract An automatic shut-off nozzle has a single diaphragm responsive to either the vapor pressure in the tank which is being filled exceeding a predetermined pressure or the liquid in the tank reaching a predetermined level. When the liquid in the tank reaches the predetermined level, the diaphragm moves in one direction to cause closing of a manually operated valve which stops flow through the nozzle through a connecting mechanism. When the pressure in the tank exceeds a predetermined pressure, the diaphragm moves in the opposite direction, but the connecting mechanism has transfer links to cause the valve to again be closed even though the diaphragm moves in the opposite direction.
Inventors
- 👤 D Lasater
- 👤 C Wood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:39
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
216 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, manually 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 manually operated means in response to either of two 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, first means communicating with the tank and responsive to either of the conditions existing in the tank, said first means being movable in the one direction in response to one of the conditions existing in the tank and in the opposite direction in response to the other of the conditions existing in the tank, and second means cooperating with said first means and said release means to cause movement of said release means in the one direction irrespective of whether said first means moves in the one direction or the opposite direction.
Claim 2
Dependent Claim
216 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, manually 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 manually operated means in response to either of two 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, first means communicating with the tank and responsive to either of the conditions existing in the tank, said first means being movable in the one direction in response to one of the conditions existing in the tank and in the opposite direction in response to the other of the conditions existing in the tank, and second means cooperating with said first means and said release means to cause movement of said release means in the one direction irrespective of whether said first means moves in the one direction or the opposite direction.
Claim 3
Dependent Claim
57 words
The nozzle according to claim 1 in which the tank being filled is sealed, said first means is a diaphragm movable in the one direction in response to the liquid in the sealed tank reaching the predetermined level and in the opposite direction in response to the vapor pressure in the sealed tank exceeding the predetermined pressure.
Claim 4
Dependent Claim
54 words
The nozzle according to claim 2 in which said second means includes means connected to said diaphragm for movement therewith in either direction and means supported by said connected means to move said release means only in the one direction irrespective of whether said diaphragm moves in the one direction or the opposite direction.
Claim 5
Dependent Claim
84 words
The nozzle according to claim 3 in which said supported means of said second means includes means pivotal in response to movement of said connected means in the opposite direction when said diaphragm moves in the opposite direction in response to the vapor pressure in the sealed tank exceeding the predetermined pressure, said pivotal means moving said release means in the one direction and relative to said diaphragm and said connected means when said diaphragm and said connected means move in the opposite direction.
Claim 6
Dependent Claim
78 words
The nozzle according to claim 4 in which said pivotal means includes a pair of links, each of said links having one end supported by said connected means and its other end engaging said release means, and said body has fulcrum means intermediate the ends of each of said links to cause pivoting of said links when said diaphragm moves in the opposite direction in response to the vapor pressure in the sealed tank exceeding the predetermined pressure.
Claim 7
Dependent Claim
34 words
The nozzle according to claim 2 in which said second means includes means to transfer the movement of said diaphragm in the opposite direction into movement of said release means in the oNe direction.
Claim 8
Dependent Claim
34 words
The nozzle according to claim 6 in which said transfer means includes means pivotal in response to movement of said diaphragm in the opposite direction to move said release means in the one direction.
Claim 9
Dependent Claim
35 words
The nozzle according to claim 1 in which said second means includes means to transfer the movement of said first means in the opposite direction into movement of said release means in the one direction.
Claim 10
Dependent Claim
35 words
The nozzle according to claim 8 in which said transfer means includes means pivotal in response to movement of said first means in the opposite direction to move said release means in the one direction.
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) | 1977-07-15 | 1978-01-14 | 1978-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-15 | 1982-01-14 | 1982-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-15 | 1986-01-14 | 1986-07-16 | $7700.00 | Window Closed / Lapsed |