Bistable safety dispensing valve for fluid dispensers
Abstract
Abstract A VALVE STEM OF A DISPENSING VALVE FOR A PRESSURIZED DISPENSER IS COUPLED TO A BISTABLE SPRING FOR MOVEMENT TO A VENT POSITION WHEN THE PRESSURE WITHIN THE DISPENSER EXCEEDS NORMAL DISPENSING PRESSURES. THE VALVE STEM IS MAINTAINED IN THE VENT POSITION BY THE BISTABLE SPRING, WHICH IS IN ONE OF ITS STABLE POSITIONS, NOTWITHSTANDING A DROP IN PRESSURE WITHIN A DISPENSER. AT NORMAL OPERATING PRESSURES, THE BISTABLE SPRING IS IN ITS ALTERNATE STABLE POSITION AND RESISTS DISPENSER PRESSURE TO MAINTAIN THE VALVE STEM OUT OF THE VENT POSITION. UNDER NORMAL PRESSURES, THE VALVE IS OPERATED TO DISPENSE PRODUCT BY FINGER PRESSURE APPLIED TO THE VALVE STEM AGAINST THE SPRING TO COMMUNICATE A PRODUCT PORT LEADING TO A PRODUCT PASSAGE WITH THE INTERIOR OF THE DISPENSER. ACTUATION MAY BE DONE BY APPLYING PRESSURE EITHER NORMAL TO THE VALVE STEM OR AXIALLY ALONG THE VALVE STEM.
Inventors
- 👤 Roger K Bruce
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-23 | 1975-11-22 | 1976-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-23 | 1979-11-22 | 1980-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-23 | 1983-11-22 | 1984-05-23 | $7700.00 | Window Closed / Lapsed |