US3840151A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid fuel dispensing pump
Assignee: WLTD Ltd
•
Filing: 1973-04-16
•
Granted: 1974-10-08
•
Expires: 1993-04-16
Abstract
Abstract A liquid fuel blender dispensing pump having a computer to drive price and volume indicator drums and an interlock shaft to switch on the computer. A reset motor is coupled to reset the drums to zero and then switch on the main pump motor at the beginning of a dispensing cycle. The reset motor is also coupled to drive the interlock shaft and is switched on by movement of an actuator in response to or allowed by removal of the dispensing nozzle from the pump housing.
Inventors
- 👤 R Jarvis
- 👤 J Croxford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:48
CPC Classifications
B; B67; B67D; B67D7/00; B67D7/06; B67D7/08; B67D7/22; B67D7/26; B67D7/263; B67D7/74; B67D7/741; B67D7/742; B67D2007/745; B67D2007/746
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
231 words
A liquid fuel dispensing pump of the blending kind which blends two base grades of liquid fuel, the pump comprising: a computer which computes and totalizes the value of fuel as it is dispensed; price and volume indicating drums controlled by the computer; an electric reset motor coupled to reset, when energised, the indicating drums to zero; a reset switch for energising the reset motor; a housing for the pump; a nozzle normally housed in the pump housing; an actuator in the housing which is depressed by the action of pushing the nozzle home in the housing; an interlock shaft coupled to the computer to switch the computer on and off when turned; a mechanical linkage coupling the actuator wiTh the reset switch so that movement of the actuator allowed by removal of the nozzle from the housing switches on the reset switch; and coupling means between the reset motor and the interlock shaft whereby the interlock shaft is turned by the reset motor to switch on the computer, said coupling means comprises a cam mounted to be turned, by the reset motor; a lever having a cam follower which co-operates with the cam; a spring which urges the lever to press the cam follower on the cam and a crank on the interlock shaft, the end of the lever remote from the cam follower being arranged to engage the crank.
Claim 2
Dependent Claim
231 words
A liquid fuel dispensing pump of the blending kind which blends two base grades of liquid fuel, the pump comprising: a computer which computes and totalizes the value of fuel as it is dispensed; price and volume indicating drums controlled by the computer; an electric reset motor coupled to reset, when energised, the indicating drums to zero; a reset switch for energising the reset motor; a housing for the pump; a nozzle normally housed in the pump housing; an actuator in the housing which is depressed by the action of pushing the nozzle home in the housing; an interlock shaft coupled to the computer to switch the computer on and off when turned; a mechanical linkage coupling the actuator wiTh the reset switch so that movement of the actuator allowed by removal of the nozzle from the housing switches on the reset switch; and coupling means between the reset motor and the interlock shaft whereby the interlock shaft is turned by the reset motor to switch on the computer, said coupling means comprises a cam mounted to be turned, by the reset motor; a lever having a cam follower which co-operates with the cam; a spring which urges the lever to press the cam follower on the cam and a crank on the interlock shaft, the end of the lever remote from the cam follower being arranged to engage the crank.
Claim 3
Dependent Claim
50 words
A liquid fuel dispensing pump as claimed in claim 1 wherein there is provided a latch to hold the lever against the spring when the interlock shaft has been turned thereby to the ''''on'''' position and means coupling the actuator is to release the latch when the nozzle is replaced.
Claim 4
Dependent Claim
43 words
A liquid fuel dispensing pump as claimed in claim 2 wherein the actuator is coupled to a reset shaft and the reset shaft is coupled to the reset switch and also to the latch to release the latch when the nozzle is replaced.
Claim 5
Dependent Claim
51 words
A liquid fuel dispensing pump as claimed in claim 3 wherein a manual blend selector knob is provided for selecting a required blend, and there is an interlock between the blend selector and the reset shaft effective to prevent rotations of the reset shaft unless a blend has been selected properly.
Claim 6
Dependent Claim
134 words
A liquid fuel dispensing pump as claimed in claim 4 wherein the interlock comprises a first plate fixed on the reset shaft, which plate has a peg therein and a link carrying a second plate, the second plate having an ''L''-shaped slot therein in which the peg rides the link being coupled to a detent wheel which raises and lowers the slot with respect to the peg as the blend selector is moved from one grade position to the next, the first plate and thus the reset shaft being prevented from turning when the second plate is raised, namely when the blend selector is between grade positions and the second plate being prevented from being raised by co-operation with the peg when the first plate has been turned to switch the reset switch on.
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) | 1977-10-07 | 1978-04-08 | 1978-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-07 | 1982-04-08 | 1982-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-07 | 1986-04-08 | 1986-10-08 | $7700.00 | Window Closed / Lapsed |