Patent US3788550A successfully refreshed from Google Patents.
US3788550A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic intermittent spray valve for pressurized packaging
Assignee: TOKUSYU AEROSOL CO Ltd
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Filing: 1972-10-06
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Granted: 1974-01-29
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Expires: 1992-10-06
Abstract
Abstract An automatic intermittent spray valve for pressurized packaging or aerosols comprising a piston cylinder which is composed of a greater diameter section and a smaller diameter section, both sections being communicated with the discharge valve of a pressurized package container. A channel connecting said discharge valve and the greater diameter section is choked by a flow regulating means, a needle valve for instance. As the contents of the pressurized package container (liquefied gas composition) enters the greater diameter section of the piston cylinder at a controlled rate, the free piston moves toward the smaller diameter section and effects spraying when the piston has moved to some extent. After the spraying is effected, the free piston returns to the initial position and thus intermittent spraying is repeated. This valve can be used for the conventional pressurized packaging and intermittent spraying is effected at constant intervals regardless of change in the ambient temperature.
Inventors
- 👤 S Nishiguchi
- 👤 M Okatani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:54
CPC Classifications
B; B65; B65D; B65D83/00; B65D83/14; B65D83/16; B65D83/26; B65D83/265
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
258 words
An automatic intermittent spray valve for pressurized package products comprising: (1) a valve body which comprises a channel for a liquefied gas composition (contents of a presurrized package product) which can be connected to the valve stem of a conventional pressurized package container; a means for regulating the flow rate of the liquefied gas composition flowing through the channel from the pressurized package container; and a piston cylinder which is composed of a greater diameter section communicating with said channel at the lower stream side of said flow regulating means and a smaller diameter section communicating with said channel at the upper stream side of said flow regulating means, and is provided with a spray orifice in the middle section thereof; (2) a free piston placed in said piston cylinder, said piston being composed of a greater diameter part which keeps a gas-tight contact with the inside wall of said greater diameter section of the cylinder and has a through-hole and a smaller diameter part which keeps a gas-tight contact with said smaller diameter section of the cylinder and the both parts being rigidly connected in a fashion that said greater diameter section communicates with the spray orifice when said throughhole is opened; and (3) a stopper piece which is suported by a resilient means secured to the piston cylinder and closes the through-hole of the greater diameter part when the piston is positioned at the greater diameter section side, and opens the through-hole when the piston has moved toward the smaller diameter section side to some extent.
Claim 2
Dependent Claim
258 words
An automatic intermittent spray valve for pressurized package products comprising: (1) a valve body which comprises a channel for a liquefied gas composition (contents of a presurrized package product) which can be connected to the valve stem of a conventional pressurized package container; a means for regulating the flow rate of the liquefied gas composition flowing through the channel from the pressurized package container; and a piston cylinder which is composed of a greater diameter section communicating with said channel at the lower stream side of said flow regulating means and a smaller diameter section communicating with said channel at the upper stream side of said flow regulating means, and is provided with a spray orifice in the middle section thereof; (2) a free piston placed in said piston cylinder, said piston being composed of a greater diameter part which keeps a gas-tight contact with the inside wall of said greater diameter section of the cylinder and has a through-hole and a smaller diameter part which keeps a gas-tight contact with said smaller diameter section of the cylinder and the both parts being rigidly connected in a fashion that said greater diameter section communicates with the spray orifice when said throughhole is opened; and (3) a stopper piece which is suported by a resilient means secured to the piston cylinder and closes the through-hole of the greater diameter part when the piston is positioned at the greater diameter section side, and opens the through-hole when the piston has moved toward the smaller diameter section side to some extent.
Claim 3
Dependent Claim
39 words
The automatic intermittent spray valve for pressurized package products as described in claim 1, wherein the free piston is provided with a bucket type gasket which slides along the piston cylinder wall keeping gas tightness at each end thereof.
Claim 4
Dependent Claim
67 words
The automatic intermittent spray valve for pressurized package products as described in claim 2, wherein the free piston comprises a bottomed cylinder having a through-hole in the side wall thereof, and the stopper piece is a rivet-shaped piece which is inserted in the hollow of the piston with the head thereof out of the hollow and is supported by the valve body by means of a spring.
Claim 5
Dependent Claim
110 words
The automatic intermittent spray valve for pressurized package products as described in claim 2, wherein the free piston comprises a bottom cylinder having two slots or windows provided in the cylinder wall at the diametrically opposite positions, and the stopper piece is a rivet-shaped piece which is inserted in the hollow of the piston with the head thereof out of the hollow and is supported by a spring one end of which is connected to the tail end of the stopper piece and the other thereof is secured to a crosspiece which penetrates the two slots of the piston and is secured to the piston cylinder wall at both ends.
Claim 6
Dependent Claim
87 words
The automatic intermittent spray valve for pressurized package products as described in claim 2, wherein the free piston comprises a bottomed cylinder having two slots or windows provided in the cylinder wall at the diametrically opposite positions, and the stopper piece is bullet shaped and has a slot extending diametrically therethrough and is located within the piston and supported by resilient means which extends through the slots of the piston and the slot of the stopper piece and is secured to the piston wall at both ends.
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) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |