Patent US3913841A successfully refreshed from Google Patents.
US3913841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sprayer
Assignee: Individual
•
Filing: 1974-09-09
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Granted: 1975-10-21
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Expires: 1994-09-09
Abstract
Abstract A sprayer is adapted to suction a liquid under back pressure and squirt the liquid in the atomized form from the nozzle by applying a pressure to the liquid. The sprayer comprises a sprayer body having a suction pipe and a cylinder communicating with the suction pipe, and a cylindrical projection extending from the closed end toward the open end of the cylinder and communicating with the suction pipe. A piston is slidably mounted to the sprayer body in a manner to surround the cylindrical projection. The piston defines such a liquid chamber that when the piston is moved into closest proximity to the closed end of the cylinder the volume of the liquid chamber is made minimal. As a result, when the piston is so moved, a liquid within the chamber is squirted efficiently at high pressure.
Inventors
- 👤 Tetsuya Tada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:36
CPC Classifications
B; B05; B05B; B05B11/00; B05B11/01; B05B11/10; B05B11/1001; B05B11/1009; B05B11/0005; B05B11/0062
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
185 words
A sprayer comprising a sprayer body having at one end a suction pipe and at the other end a cylinder communicating with the suction pipe and having an open end and closed end; a cylindrical projection mounted on the closed end of the cylinder in a manner to extend toward the open end of the cylinder, and communicating with the suction pipe; a first valve disposed within the spray body to permit a flow of liquid from the suction pipe; a piston slidably movable along the inner surface of the cylinder and surrounding the cylindrical projection, said piston including a cap member mounted at the forward end portion of the cylinder and having a nozzle, and a liquid chamber defined therein to permit the liquid to flow through the first valve, said liquid chamber being so dimensioned that when the piston is moved in closest proximity to the closed end of the cylinder the cylindrical projection makes the volume of the liquid chamber minimal; and a second valve disposed within the piston to allow the liquid to flow from the liquid chamber toward the nozzle.
Claim 2
Dependent Claim
185 words
A sprayer comprising a sprayer body having at one end a suction pipe and at the other end a cylinder communicating with the suction pipe and having an open end and closed end; a cylindrical projection mounted on the closed end of the cylinder in a manner to extend toward the open end of the cylinder, and communicating with the suction pipe; a first valve disposed within the spray body to permit a flow of liquid from the suction pipe; a piston slidably movable along the inner surface of the cylinder and surrounding the cylindrical projection, said piston including a cap member mounted at the forward end portion of the cylinder and having a nozzle, and a liquid chamber defined therein to permit the liquid to flow through the first valve, said liquid chamber being so dimensioned that when the piston is moved in closest proximity to the closed end of the cylinder the cylindrical projection makes the volume of the liquid chamber minimal; and a second valve disposed within the piston to allow the liquid to flow from the liquid chamber toward the nozzle.
Claim 3
Dependent Claim
19 words
A sprayer according to claim 1 in which said piston has an annular extension extending toward the cylindrical projection.
Claim 4
Dependent Claim
61 words
A sprayer according to claim 2 in which an annular abutting member against which said extension is abutted when the piston is slidably moved relative to the cylinder is further provided at the forward end of the cylindrical projection; and said first chamber is disposed within a space defined by the end portion of the cylindrical projection and the abutting member.
Claim 5
Dependent Claim
48 words
A sprayer according to claim 3 in which said second valve has a rod extending through the extension of the piston and is operative to urge the first valve toward the abutting member when the piston is moved into closest proximity to the closed end of the cylinder.
Claim 6
Dependent Claim
44 words
A sprayer according to claim 4 in which said piston has a peripheral wall by which an annular space between the cylinder and the cylindrical projection is made minimal when the piston is moved into closest proximity to the closed end of the cylinder.
Claim 7
Dependent Claim
49 words
A sprayer according to claim 5 in which said piston has at one end thereof an outwardly flared sealing portion and annular groove and said cylinder has at the closed end thereof an annular projection adapted to be fitted into the annular groove to push the sealing portion outward.
Claim 8
Dependent Claim
42 words
A sprayer according to claim 1 in which a swirl means is further provided adjacent to the cap member, said swirl means defining another liquid chamber between the second valve and the cap member and imparting a swirling movement to the liquid.
Claim 9
Dependent Claim
49 words
A sprayer according to claim 7 in which said cap member is slidably mounted at the forward end portion of the piston whereby when the distance between the swirl means and the cap member is adjusted the angle at which the liquid is squirted from the nozzLe is varied.
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) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |