US4025046A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid atomisers
Assignee: Societe Technique de Pulverisation SA STEP
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Filing: 1976-03-19
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Granted: 1977-05-24
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Expires: 1996-03-19
Abstract
Abstract An atomizer comprises a cylinder defining a pump chamber and containing a piston. The chamber communicates with an atomizer nozzle by a valve comprising a valve member which is opened at a predetermined liquid pressure during operation of the piston to pressurize the liquid in the pump chamber. Liquid is fed into the pump chamber through a conduit which projects upwardly into the cylinder. A sleeve rigid with the valve member or the piston engages the conduit during operation of the piston to prevent communication between the conduit and the pump chamber.
Inventors
- 👤 Michel Boris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:42
CPC Classifications
B; B05; B05B; B05B11/00; B05B11/01; B05B11/10; B05B11/1001; B05B11/1016; B05B11/1018; F; F04; F04B; F04B53/00; F04B53/10; F04B53/12; F04B53/125; F04B53/129; F04B53/16; F04B53/162
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
184 words
In an atomizer, cylinder means, conduit means extending upwardly within the cylinder means to define therewith a pump chamber, said conduit means being capable of selective communication with the pump chamber, inlet means communicating with the conduit means, an atomizer nozzle; passage means providing communication between the pump chamber and the nozzle, a first piston member slidable in the cylinder to force liquid from the pump chamber to the nozzle via the passage means, valve means operative to close the passage means in an inoperative condition of the atomizer, said valve means comprising means defining a valve seat movable with the first piston member, and a valve member engageable with the seat, the pressure of the liquid in the pump chamber tending to move the valve member out of engagement with the seat whereby to open the passage, bias means biasing the valve member into engagement with the seat, and means movable during operation of the piston member to engage the conduit means and interrupt communication between the conduit means and the pump chamber, said movable means being rigid with one of said members.
Claim 2
Dependent Claim
184 words
In an atomizer, cylinder means, conduit means extending upwardly within the cylinder means to define therewith a pump chamber, said conduit means being capable of selective communication with the pump chamber, inlet means communicating with the conduit means, an atomizer nozzle; passage means providing communication between the pump chamber and the nozzle, a first piston member slidable in the cylinder to force liquid from the pump chamber to the nozzle via the passage means, valve means operative to close the passage means in an inoperative condition of the atomizer, said valve means comprising means defining a valve seat movable with the first piston member, and a valve member engageable with the seat, the pressure of the liquid in the pump chamber tending to move the valve member out of engagement with the seat whereby to open the passage, bias means biasing the valve member into engagement with the seat, and means movable during operation of the piston member to engage the conduit means and interrupt communication between the conduit means and the pump chamber, said movable means being rigid with one of said members.
Claim 3
Dependent Claim
17 words
An atomizer according to claim 1, wherein the said movable means is rigid with the valve member.
Claim 4
Dependent Claim
17 words
An atomizer according to claim 1, wherein the said movable means is rigid with the piston member.
Claim 5
Dependent Claim
62 words
An atomizer according to claim 1, wherein the first piston member has an internal cavity, and the said movable means comprises a sleeve located within the cavity of the first piston member and defining a second chamber in communication with the pump chamber, said atomizer further comprising a second piston member rigid with the valve member and slidable in the second chamber.
Claim 6
Dependent Claim
30 words
An atomizer according to claim 4, wherein a clearance is defined between the sleeve and the first piston member to place the second chamber in communication with the pump chamber.
Claim 7
Dependent Claim
23 words
An atomizer according to claim 4, wherein the bias means comprises a spring interposed between the second piston member and the conduit means.
Claim 8
Dependent Claim
52 words
An atomizer according to claim 4, wherein the passage means comprises tube means rigid with the first piston member, said tube means carrying said nozzle and said valve seat, said atomizer further comprising rod means connecting the valve member to the second piston member, said rod means extending into the tube means.
Claim 9
Dependent Claim
53 words
An atomizer according to claim 1, wherein the said movable means is rigid with the valve member, the first piston member has an internal cavity defining a second chamber, the movable means is slidable in the second chamber and defines a second piston member, and the second chamber communicates with the pump chamber.
Claim 10
Dependent Claim
30 words
An atomizer according to claim 8, wherein a clearance is defined between movable means and the first piston member to place the second chamber in communication with the pump chamber.
Claim 11
Dependent Claim
23 words
An atomizer according to claim 8 wherein the bias means comprises a spring interposed between the second piston member and the conduit means.
Claim 12
Dependent Claim
52 words
An atomizer according to claim 8, wherein the passage means comprises tube means rigid with the first piston member, said tube means carrying said nozzle and said valve seat, said atomizer further comprising rod means connecting the valve member to the second piston member, said rod means extending into the tube means.
Claim 13
Dependent Claim
50 words
An atomizer according to claim 1, wherein the valve member has a portion projecting outwardly from the seat when the valve member is in its closed position, whereby the liquid pressure acts on said projecting portion in a sense to move the valve member out of engagement with the seat.
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) | 1980-05-23 | 1980-11-22 | 1981-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-23 | 1984-11-22 | 1985-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-23 | 1988-11-22 | 1989-05-24 | $7700.00 | Window Closed / Lapsed |