US3746260A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Atomizers
Assignee: Societe Technique de Pulverisation SA STEP
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Filing: 1972-04-10
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Granted: 1973-07-17
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Expires: 1992-04-10
Abstract
Abstract A liquid atomizer comprises a first cylinder containing a hollow, first piston, an atomizing nozzle communicating with the hollow piston a second cylinder of smaller cross-section than the first and communicating therewith. A second piston is slidable in the second cylinder and valve means connected to the second piston serve to block communication between the hollow piston and the nozzle. First and second springs are provided which respectively bias the valve means to close off the communication with the nozzle and lie between the two cylinders to bias them apart.
Inventors
- 👤 M Boris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:10
CPC Classifications
B; B05; B05B; B05B11/00; B05B11/01; B05B11/10; B05B11/1042; B05B11/1061; B05B11/1001; B05B11/1016
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
138 words
In a liquid atomizer, a first cylinder, a hollow, first, piston slidable in the first cylinder, an atomizing nozzle communicating with the hollow piston, a second cylinder of smaller cross-section than the first cylinder and communicating with the first cylinder, a second piston slidable in the second cylinder, valve means connected to the second piston and disposed to interrupt communication between the first cylinder and the nozzle, a first spring acting on the second piston and biasing the valve means to a position in which the said communication is interrupted, a non-return valve, a plunger tube communicating with a space defined by the two cylinders through the non-return valve, the second cylinder being disposed within the first piston and being movable with respect to the first cylinder, and a second spring acting to bias the two cylinders apart.
Claim 2
Dependent Claim
138 words
In a liquid atomizer, a first cylinder, a hollow, first, piston slidable in the first cylinder, an atomizing nozzle communicating with the hollow piston, a second cylinder of smaller cross-section than the first cylinder and communicating with the first cylinder, a second piston slidable in the second cylinder, valve means connected to the second piston and disposed to interrupt communication between the first cylinder and the nozzle, a first spring acting on the second piston and biasing the valve means to a position in which the said communication is interrupted, a non-return valve, a plunger tube communicating with a space defined by the two cylinders through the non-return valve, the second cylinder being disposed within the first piston and being movable with respect to the first cylinder, and a second spring acting to bias the two cylinders apart.
Claim 3
Dependent Claim
26 words
An atomizer according to claim 1, further comprising a receptacle containing the liquid to be atomized, said first cylinder having an orifice communicating with the receptacle.
Claim 4
Dependent Claim
30 words
An atomizer according to claim 1 wherein the hollow, first, piston is externally of frusto-conical form, at least over an end portion directed towards the bottom of the first cylinder.
Claim 5
Dependent Claim
34 words
An atomizer according to claim 1, wherein the wall of the second cylinder has at least one opening providing communication between the interior of the second cylinder and the interior of the first cylinder.
Claim 6
Dependent Claim
35 words
An atomizer according to claim 1, wherein the internal face of the first piston has at least one opening providing communication between the interior of the second cylinder and the interior of the first cylinder.
Claim 7
Dependent Claim
69 words
An atomizer according to claim 1, comprising a tube affording communication between the interior of the first piston and the nozzle, said tube comprising a part of reduced diameter which defines a seat forming one portion of said valve means, the other portion of said valve means comprising a rod connected to the second piston slidably mounted on said tube and the end of which co-operates with said seat.
Claim 8
Dependent Claim
38 words
An atomizer according to claim 2, wherein the second cylinder has opposite the second piston a discharge orifice aligned with an orifice formed in the first piston and communicating with the receptacle containing the liquid to be atomized.
References Cited (Backward Citations)
No citation records indexed.
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 |