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US3746059A
Expired / Lapsed
US
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Gas injection for gas lighters
Assignee: Mitani Valve Co Ltd
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Filing: 1970-02-26
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Granted: 1973-07-17
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Expires: 1990-02-26
Abstract
Abstract An injection valve for injecting a gas into a gas lighter or the like comprising a valve stem operable in a valve cylinder. The valve stem carries a resilient element which seals an opening in an injection passage in the valve stem. The resilient element is of a smaller diameter than the portion of the valve cylinder in which it operates to permit gas to pass between the resilient element and the cylindrical wall when the valve stem is being displaced from a closed to an injection position. However, when the valve stem reaches the injection position, the resilient element is deflected to expose the injection passage in the valve stem to permit liquified gas to pass therethrough.
Inventors
- 👤 K Mizuguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:08
CPC Classifications
F; F23; F23Q; F23Q2/00; F23Q2/34; F23Q2/52; Y; Y10; Y10T; Y10T137/00; Y10T137/598; Y10T137/612; Y10T137/613; Y10T137/6137; Y10T137/8593; Y10T137/86292; Y10T137/86324; Y10T137/86332
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
334 words
An injection valve for injecting liquified gas into a gas lighter of the type which is adapted to being mounted on a storage tank, which comprises: a valve cylinder having an upper section and a lower section having a plurality of different diameters; a passage communicating with said sections; separate passage communicating with the atmosphere; a valve stem having an injection passage therethrough and mounted in said valve cylinder so that a discharge passage is formed in an annular space between said valve stem and said passage communicating with said sections, said valve stem further comprising a lower portion positioned in said lower valve cylinder section which is in the shape of a hollow piston open at its lower end, said valve stem being operable in said valve cylinder between a closed position, an intermediate discharge position and an injection position, said lower piston portion of said valve stem being adapted to compress gases in a first portion of said lower valve cylinder section having a smaller diameter than a second portion, when said valve stem is in said intermediate position; means for blocking and opening said discharge passage comprising an annular resilient sealing ring located at the upper end of said valve stem and an inclined stepped portion in said upper cylinder, said ring being adapted to engage said inclined stepped portion to contact and seal said discharge passage to prevent the escape of injected gas when said valve stem is in said injection position, and a resilient annular plate located on said valve stem between said sealing ring and said piston portion, said resilient annular plate being adapted to block said discharge passage when said valve stem is in said closed position; and means for opening and blocking said injection passage comprising said resilient annular plate and said first portion of said lower cylinder, said resilient annular plate being adapted to engage said first portion and flex to thereby open said injection passage when said valve stem is in said injection position.
Claim 2
Dependent Claim
334 words
An injection valve for injecting liquified gas into a gas lighter of the type which is adapted to being mounted on a storage tank, which comprises: a valve cylinder having an upper section and a lower section having a plurality of different diameters; a passage communicating with said sections; separate passage communicating with the atmosphere; a valve stem having an injection passage therethrough and mounted in said valve cylinder so that a discharge passage is formed in an annular space between said valve stem and said passage communicating with said sections, said valve stem further comprising a lower portion positioned in said lower valve cylinder section which is in the shape of a hollow piston open at its lower end, said valve stem being operable in said valve cylinder between a closed position, an intermediate discharge position and an injection position, said lower piston portion of said valve stem being adapted to compress gases in a first portion of said lower valve cylinder section having a smaller diameter than a second portion, when said valve stem is in said intermediate position; means for blocking and opening said discharge passage comprising an annular resilient sealing ring located at the upper end of said valve stem and an inclined stepped portion in said upper cylinder, said ring being adapted to engage said inclined stepped portion to contact and seal said discharge passage to prevent the escape of injected gas when said valve stem is in said injection position, and a resilient annular plate located on said valve stem between said sealing ring and said piston portion, said resilient annular plate being adapted to block said discharge passage when said valve stem is in said closed position; and means for opening and blocking said injection passage comprising said resilient annular plate and said first portion of said lower cylinder, said resilient annular plate being adapted to engage said first portion and flex to thereby open said injection passage when said valve stem is in said injection position.
Claim 3
Dependent Claim
21 words
The injection valve of claim 1, wherein said lower valve cylinder section is compressively fitted to said upper valve cylinder section.
Claim 4
Dependent Claim
30 words
An Injection lower valve according to claim 1 wherein said first and second sections of said valve cylinder are defined by a wall member having a substantially continuous conical configuration.
Claim 5
Dependent Claim
26 words
An injection valve according to claim 1 wherein said first section of said lower valve cylinder is provided with openings for the passage of gas therethrough.
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) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |