US3825153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid state automatic fluid dispensing means
Assignee: Individual
•
Filing: 1973-02-22
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Granted: 1974-07-23
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Expires: 1993-02-22
Abstract
Abstract A unique solid state control circuit is disclosed whereby a preselected volume of fluid may be automatically dispensed. Fundamentally, the invention comprises a plurality of selection switches, each of which is associated with a particular volume of fluid. A sequential logic circuit indicates the actual volume of fluid which has been dispensed. A logic network compares the states of the selection switches with the output of the sequential logic circuit so as to determine when the volume of fluid actually dispensed equals the preselected volume indicated by the selection switches. When equivalency occurs the logic network indicates the same to a current source transistor which in turn, through a triac, controls the solenoid pump valve through which the fluid is being dispensed. The circuit disclosed is adaptable for use in presently existing gasoline pumps and is designed with specific considerations given to the ambient conditions in which the circuit must operate.
Inventors
- 👤 B Patrick
- 👤 H Timms
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:50
CPC Classifications
B; B67; B67D; B67D7/00; B67D7/06; B67D7/08; B67D7/30; B67D7/302; B67D7/303
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
126 words
A solid state automatic fluid dispensing control circuit, comprising: a series of selection switches; a logic network connected to the selection switches and receiving from the switches electrical indicia of the quantity of fluid to be dispensed; a sequential logic circuit of series-connected flip-flops connected to the logic network monitoring the particular amount of fluid which has actually been dispensed and electrically signalling the logic network of such dispensing; a clock circuit, comprising a reed switch connected to a latch circuit, connected to the sequential logic circuit, the clock circuit producing electrical pulses indicative of the amount of fluid dispensed for updating the sequential logic circuit; and a valve control circuit receiving output signals from the logic network and controlling the fluid flow in accordance therewith.
Claim 2
Dependent Claim
126 words
A solid state automatic fluid dispensing control circuit, comprising: a series of selection switches; a logic network connected to the selection switches and receiving from the switches electrical indicia of the quantity of fluid to be dispensed; a sequential logic circuit of series-connected flip-flops connected to the logic network monitoring the particular amount of fluid which has actually been dispensed and electrically signalling the logic network of such dispensing; a clock circuit, comprising a reed switch connected to a latch circuit, connected to the sequential logic circuit, the clock circuit producing electrical pulses indicative of the amount of fluid dispensed for updating the sequential logic circuit; and a valve control circuit receiving output signals from the logic network and controlling the fluid flow in accordance therewith.
Claim 3
Dependent Claim
38 words
The control circuit as recited in claim 1 wherein the valve control circuit comprises a transistor controlled triac, the triac being in shunt with a series connected resistor and capacitor for limiting voltage fluctuations incident to the triac.
Claim 4
Dependent Claim
26 words
The control circuit as recited in claim 2 wherein the transistor is shunted across its base-emitter junction with at least one diode to provide temperature stability.
Claim 5
Dependent Claim
144 words
A fluid dispensing control circuit for controlling the automatic dispensing of a preselected volume of fluid through a valve from a fluid dispensing means, comprising: sequential logic circuitry of series-connected flip-flops for electrically monitoring the actual dispensing of fluid from the fluid dispensing means; a plurality of operator selectable switches, one associated with each of a particular value of fluid to be dispensed; a logic network comprising a plurality of gates, one connected to and enabled by a corresponding one of the switches and further connected to the output of a corresponding one of the flip-flops, the outputs of the gates correlating the actual dispensing of fluid from the fluid dispensing means with the preselected volume of fluid to be dispensed; and a valving circuit connected to and receiving signals from the logic network and controlling the actuation of the valve in accordance therewith.
Claim 6
Dependent Claim
144 words
A fluid dispensing control circuit for controlling the automatic dispensing of a preselected volume of fluid through a valve from a fluid dispensing means, comprising: sequential logic circuitry of series-connected flip-flops for electrically monitoring the actual dispensing of fluid from the fluid dispensing means; a plurality of operator selectable switches, one associated with each of a particular value of fluid to be dispensed; a logic network comprising a plurality of gates, one connected to and enabled by a corresponding one of the switches and further connected to the output of a corresponding one of the flip-flops, the outputs of the gates correlating the actual dispensing of fluid from the fluid dispensing means with the preselected volume of fluid to be dispensed; and a valving circuit connected to and receiving signals from the logic network and controlling the actuation of the valve in accordance therewith.
Claim 7
Dependent Claim
33 words
A control circuit as recited in claim 4 wherein the valving circuit comprises a transistor controlled triac, the transistor being temperature insensitive and the triac being shunted by a voltage transient negating circuit.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-22 | 1978-01-21 | 1978-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-22 | 1982-01-21 | 1982-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-22 | 1986-01-21 | 1986-07-23 | $7700.00 | Window Closed / Lapsed |