US3638840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety valve for aerosol containers
Assignee: Individual
•
Filing: 1969-07-09
•
Granted: 1972-02-01
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Expires: 1989-07-09
Abstract
Abstract A safety valve for an aerosol container which permits the discharge of the residual propellant gases in a used container when the valve stem is broken off. The container is thereby rendered safe from explosion caused by heat and also cannot be refilled.
Inventors
- 👤 Mitsuo Ishida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:21
CPC Classifications
B; B65; B65D; B65D83/00; B65D83/14; B65D83/44; B65D83/48; B65D83/16; B65D83/162
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
151 words
In an aerosol container, a combination comprising a hollow housing arranged to accommodate a supply of pressurized flowable material; and a valve mounted in said housing and operative to normally seal the interior of said housing from the atmosphere, said valve including a valve stem movable between a first position in which said valve seals the interior of said housing from the atmosphere and a second position in which said valve stem establishes a path for communication between the interior of said container and the atmosphere, said valve also having a weakened portion defining a passage which is in permanent communication with the interior of said housing and which is normally sealed from the atmosphere, and an external portion accessible to the application of stresses of a magnitude which will break the valve along said weakened portion to thus establish permanent communication between the interior of said housing and the atmosphere.
Claim 2
Dependent Claim
151 words
In an aerosol container, a combination comprising a hollow housing arranged to accommodate a supply of pressurized flowable material; and a valve mounted in said housing and operative to normally seal the interior of said housing from the atmosphere, said valve including a valve stem movable between a first position in which said valve seals the interior of said housing from the atmosphere and a second position in which said valve stem establishes a path for communication between the interior of said container and the atmosphere, said valve also having a weakened portion defining a passage which is in permanent communication with the interior of said housing and which is normally sealed from the atmosphere, and an external portion accessible to the application of stresses of a magnitude which will break the valve along said weakened portion to thus establish permanent communication between the interior of said housing and the atmosphere.
Claim 3
Dependent Claim
16 words
A combination as defined in claim 1, wherein said weakened portion is provided in said stem.
Claim 4
Dependent Claim
39 words
A combination as defined in claim 1, further comprising a flexible sealing means surrounding said weakened portion in the first position of said stem and cooperating with said stem to seal the interior of the housing from the atmosphere.
Claim 5
Dependent Claim
25 words
A combination as defined in claim 1, further comprising a conduit communicating with the interior of said housing and defining a portion of said path.
Claim 6
Dependent Claim
19 words
A combination as defined in claim 1, further comprising spring means for biasing said stem to said first position.
Claim 7
Dependent Claim
17 words
A combination as defined in claim 1, wherein said weakened portion is provided with an external groove.
Claim 8
Dependent Claim
14 words
A combination as defined in claim 1, wherein said passage is a blind bore.
Claim 9
Dependent Claim
117 words
In an aerosol container, a combination comprising a hollow housing arranged to accommodate a supply of pressurized flowable material; and a valve mounted in said housing and operative to normally seal the interior of said housing from the atmosphere, said valve having a weakened portion defining a first passage which is in permanent communication with the interior of said housing and which is normally sealed from the atmosphere, a normally sealed second passage having a portion extending through said weakened portion, and an external portion accessible for the application of stresses of a magnitude which will break the valve along said weakened portion to thus establish permanent communication between the interior of the houSing and the atmosphere.
Claim 10
Dependent Claim
117 words
In an aerosol container, a combination comprising a hollow housing arranged to accommodate a supply of pressurized flowable material; and a valve mounted in said housing and operative to normally seal the interior of said housing from the atmosphere, said valve having a weakened portion defining a first passage which is in permanent communication with the interior of said housing and which is normally sealed from the atmosphere, a normally sealed second passage having a portion extending through said weakened portion, and an external portion accessible for the application of stresses of a magnitude which will break the valve along said weakened portion to thus establish permanent communication between the interior of the houSing and the atmosphere.
Claim 11
Dependent Claim
182 words
In an aerosol container, a combination comprising a hollow housing arranged to accommodate a supply of pressurized flowable material; and a valve mounted in said housing and operative to normally seal the interior of the housing from the atmosphere, said valve having a weakened portion defining a passage which is in permanent communication with the interior of the housing and which is normally sealed from the atmosphere, and an external portion accessible to the application of stresses of a magnitude which will break the valve along said weakened portion to thus establish permanent communication between the interior of the housing and the atmosphere, said valve further comprising a stem which includes said weakened portion and which is reciprocable between sealing and open positions, said stem including a second passage having a first end communicating with the atmosphere and a second end communicating with the interior of said housing in the open position of said stem, and elastic sealing means sealing said second end in the sealing position of said stem, said second passage including an intermediate portion extending through said weakened portion.
Claim 12
Dependent Claim
182 words
In an aerosol container, a combination comprising a hollow housing arranged to accommodate a supply of pressurized flowable material; and a valve mounted in said housing and operative to normally seal the interior of the housing from the atmosphere, said valve having a weakened portion defining a passage which is in permanent communication with the interior of the housing and which is normally sealed from the atmosphere, and an external portion accessible to the application of stresses of a magnitude which will break the valve along said weakened portion to thus establish permanent communication between the interior of the housing and the atmosphere, said valve further comprising a stem which includes said weakened portion and which is reciprocable between sealing and open positions, said stem including a second passage having a first end communicating with the atmosphere and a second end communicating with the interior of said housing in the open position of said stem, and elastic sealing means sealing said second end in the sealing position of said stem, said second passage including an intermediate portion extending through said weakened portion.
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) | 1975-01-31 | 1975-08-02 | 1976-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-31 | 1979-08-02 | 1980-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-31 | 1983-08-02 | 1984-02-01 | $7700.00 | Window Closed / Lapsed |