US3593884A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid dispensing apparatus
Assignee: Individual
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Filing: 1968-10-10
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Granted: 1971-07-20
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Expires: 1988-10-10
Abstract
Abstract A gasoline pump is provided with a lost motion cam and a compressible linkage operating between the cam and the pump motor control microswitch so that the shaft carrying the cam must reach a predetermined operative position before the switch is closed. This prevents malfunctioning of the system. It also protects the microswitch from damage and allows for positive operation of the microswitch by permitting the cam to have a very much larger throw than is required to operate the microswitch.
Inventors
- 👤 Bolling H Sasnett Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:53
CPC Classifications
B; B67; B67D; B67D7/00; B67D7/06; B67D7/38; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2101
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
329 words
In a fluid dispensing system of the type including a pump; drive means for operating the pump to perform sequential dispensing operations; resettable mechanism for indicating the quantity of fluid dispensed during each operation and including control means for operating such mechanism; said control means including a shaft adapted to be rotated from a first position in which said mechanism is inoperative to a second position readying said mechanism for operation; a switch for energizing said shaft through a lost motion connection, such connection serving to move the cam only during the terminal movement of said shaft from its first to its second position; and linkage connecting said switch and said cam so that the switch will be actuated substantially simultaneously with said readying of said mechanism by movement of said shaft fully to said second position thereof; said linkage comprising two axially aligned plungers slidably mounted for axial movement the fist said plunger being operatively connected at one end to said switch, a spring urging said first plunger toward the second plunger; a second spring engaging the adjacent ends of said plungers and urging them apart, and a cam follower connected with the other end of said second plunger and riding on the cam said cam being so shaped and of such a size as to impart to said linkage a movement substantially greater than the movement of the switch between fully open and closed positions, said switch including a plunger operatively engaging the first end of said first plunger, said cam being loosely mounted on said shaft for free movement thereabout and including an opening in the form of a circular sector extending outwardly from said shaft, and a blade rigidly secured to said shaft and extending radially outward within said opening, said blade alternatively engaging opposite sides of the opening as the shaft is turned in opposite direction, said blade and slot serving to provide the aforesaid lost motion connection between the cam and the shaft.
Claim 2
Dependent Claim
329 words
In a fluid dispensing system of the type including a pump; drive means for operating the pump to perform sequential dispensing operations; resettable mechanism for indicating the quantity of fluid dispensed during each operation and including control means for operating such mechanism; said control means including a shaft adapted to be rotated from a first position in which said mechanism is inoperative to a second position readying said mechanism for operation; a switch for energizing said shaft through a lost motion connection, such connection serving to move the cam only during the terminal movement of said shaft from its first to its second position; and linkage connecting said switch and said cam so that the switch will be actuated substantially simultaneously with said readying of said mechanism by movement of said shaft fully to said second position thereof; said linkage comprising two axially aligned plungers slidably mounted for axial movement the fist said plunger being operatively connected at one end to said switch, a spring urging said first plunger toward the second plunger; a second spring engaging the adjacent ends of said plungers and urging them apart, and a cam follower connected with the other end of said second plunger and riding on the cam said cam being so shaped and of such a size as to impart to said linkage a movement substantially greater than the movement of the switch between fully open and closed positions, said switch including a plunger operatively engaging the first end of said first plunger, said cam being loosely mounted on said shaft for free movement thereabout and including an opening in the form of a circular sector extending outwardly from said shaft, and a blade rigidly secured to said shaft and extending radially outward within said opening, said blade alternatively engaging opposite sides of the opening as the shaft is turned in opposite direction, said blade and slot serving to provide the aforesaid lost motion connection between the cam and the shaft.
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) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |