US3897006A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sprayer
Assignee: Individual
•
Filing: 1974-12-20
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Granted: 1975-07-29
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Expires: 1994-12-20
Abstract
Abstract A sprayer includes a container for receiving a liquid therein, a sprayer head having a piston for sucking and ejecting the liquid from a nozzle, and a neck portion coupling said head to said container, said neck portion having a vent for permitting the interior of the container to communicate with the open air. Said vent is normally closed by a flexible closing member and, when the piston is operated, is opened by an operating rod to release a negative pressure within the container.
Inventors
- 👤 Tetsuya Tada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:19
CPC Classifications
B; B05; B05B; B05B11/00; B05B11/01; B05B11/10; B05B11/1001; B05B11/1009; B05B11/1042; B05B11/1073; B05B11/1074
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
128 words
In a sprayer including a sprayer head having a cylindrical bore, a piston slidably inserted into said cylindrical bore and a container for receiving a spray liquid therein, whereby, when operated, the piston permits the spray liquid to be sucked from the container into the cylindrical bore through pipe means and subsequently ejected from a nozzle at the tip end of the piston, the improvement comprising a neck portion formed in integrity with said sprayer head and coupled to said container, said neck portion having a vent for permitting the interior of the container to communicate with the open air, flexible closing means for normally closing said vent, operating means for deforming said closing means in accordance with the sliding movement of the piston to open said vent.
Claim 2
Dependent Claim
128 words
In a sprayer including a sprayer head having a cylindrical bore, a piston slidably inserted into said cylindrical bore and a container for receiving a spray liquid therein, whereby, when operated, the piston permits the spray liquid to be sucked from the container into the cylindrical bore through pipe means and subsequently ejected from a nozzle at the tip end of the piston, the improvement comprising a neck portion formed in integrity with said sprayer head and coupled to said container, said neck portion having a vent for permitting the interior of the container to communicate with the open air, flexible closing means for normally closing said vent, operating means for deforming said closing means in accordance with the sliding movement of the piston to open said vent.
Claim 3
Dependent Claim
42 words
A sprayer according to claim 1 wherein said operating means consists of an operating rod fixed to the piston, said rod having a portion carried into the vent when the piston has been moved into the cylindrical bore by a prescribed amount.
Claim 4
Dependent Claim
21 words
A sprayer according to claim 2 wherein said portion of said rod has a moving path substantially concentric with the vent.
Claim 5
Dependent Claim
17 words
A sprayer according to claim 3 wherein said vent is formed into an outwardly flaring bowl-like configuration.
Claim 6
Dependent Claim
31 words
A sprayer according to claim 2 wherein said neck portion has a recess opened into the interior of the container, said vent permitting said recess to communicate with the open air.
Claim 7
Dependent Claim
45 words
A sprayer according to claim 5 further comprising a hollow seal member for liquid-tightly keeping a coupling section for coupling the neck portion to the container, said seal member engaging the inner wall of said recess and having a portion which constitutes said closing means.
Claim 8
Dependent Claim
33 words
A sprayer according to claim 6 wherein said portion of said seal member closes said vent at its upper portion, and is formed thinner than the remaining portion of said hollow seal member.
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) | 1978-07-28 | 1979-01-27 | 1979-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-28 | 1983-01-27 | 1983-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-28 | 1987-01-27 | 1987-07-29 | $7700.00 | Window Closed / Lapsed |