US3608788A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid-dispensing pump
Assignee: Mitani Valve Co Ltd
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Filing: 1968-12-13
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Granted: 1971-09-28
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Expires: 1988-12-13
Abstract
Abstract This disclosure relates to a finger-operated atomizer pump for separating a liquid from a container, and is so formed that, in case a piston is pushed down or is pushed up by a resiliency of a coiled spring when the force of pushing it down is released, a valve body may move vertically to open or close a passage hole connecting an inner chamber of a cylinder and a central hole of the piston. Therefore, there are obtained advantages that the number of the component parts is small, that therefore the trouble and wage for making many component parts can be reduced, that the trouble in assembling them can be reduced and that the products can be provided cheaply.
Inventors
- 👤 Noboru Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:51
CPC Classifications
B; B05; B05B; B05B11/00; B05B11/01; B05B11/10; B05B11/1001; B05B11/1023; B05B11/1026
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
200 words
An atomizer pump wherein a valve body fitted to the lower end of a piston and inserted in a cylinder so as to perform a pumping action is formed to be large at the lower end and smaller in the diameter toward the upper end, an inwardly slope is formed in the lower portion of the piston so as to fit the upper end of the above-mentioned valve body to prevent it from expanding outward and further a ball normally pressed up on the lower surface with a coiled spring is kept in contact with the inner surface of the valve body so that, in case the piston is pushed down, the valve body may be expanded outward by the pressure of a liquid to make a clearance between the valve body and the ball and feed the liquid into the piston and, in case the piston is released and is pushed up by the force of the coiled spring, the valve body may be contracted by the frictional resistance of the inner periphery of the cylinder so as to be airtightly kept in close contact with the ball surface and suck the liquid in a container into the cylinder.
Claim 2
Dependent Claim
200 words
An atomizer pump wherein a valve body fitted to the lower end of a piston and inserted in a cylinder so as to perform a pumping action is formed to be large at the lower end and smaller in the diameter toward the upper end, an inwardly slope is formed in the lower portion of the piston so as to fit the upper end of the above-mentioned valve body to prevent it from expanding outward and further a ball normally pressed up on the lower surface with a coiled spring is kept in contact with the inner surface of the valve body so that, in case the piston is pushed down, the valve body may be expanded outward by the pressure of a liquid to make a clearance between the valve body and the ball and feed the liquid into the piston and, in case the piston is released and is pushed up by the force of the coiled spring, the valve body may be contracted by the frictional resistance of the inner periphery of the cylinder so as to be airtightly kept in close contact with the ball surface and suck the liquid in a container into the cylinder.
Claim 3
Dependent Claim
4 words
A fluid-dispensing pump comprising:
Claim 4
Dependent Claim
4 words
A fluid-dispensing pump comprising:
Claim 5
Dependent Claim
12 words
a fastening plug lid inserted into said upper portion of said chamber;
Claim 6
Dependent Claim
12 words
a fastening plug lid inserted into said upper portion of said chamber;
Claim 7
Dependent Claim
29 words
a piston rod extending through said fastening plug lid into said chamber, and including a central hole extending through its length for discharge of fluid, and a step portion;
Claim 8
Dependent Claim
29 words
a piston rod extending through said fastening plug lid into said chamber, and including a central hole extending through its length for discharge of fluid, and a step portion;
Claim 9
Dependent Claim
55 words
The fluid-dispensing pump according to claim 2, further comprising a spring member disposed between and in engagement with said fitting member and said conical hole at said lower portion of said chamber to automatically effect the upstroke of the piston rod upon release of downward pressure from said piston rod after effectuation of said downstroke.
Claim 10
Dependent Claim
41 words
The fluid-dispensing pump according to claim 2, including a first O-ring disposed between said valve means and said step portion of said piston rod, and a second O-ring disposed between said valve means and said flanged portion of said fitting member.
Claim 11
Dependent Claim
47 words
a fitting member connected to the end of said piston rod within said chamber and including side and central holes in communication with each other, and with said piston rod central hole in communication with said fitting membeR central hole, and further including a flanged portion; and
Claim 12
Dependent Claim
47 words
a fitting member connected to the end of said piston rod within said chamber and including side and central holes in communication with each other, and with said piston rod central hole in communication with said fitting membeR central hole, and further including a flanged portion; and
Claim 13
Dependent Claim
97 words
valve means slidingly engaged between said fitting member and said chamber wall and operative to enable said pump to dispense fluid only on the downstroke of said piston rod by effecting communication of said fitting member side hole with said lower portion of said chamber during the downstroke of said piston rod, and sealing said fitting member side hole from said lower portion of said chamber during the upstroke of said piston rod, the travel of said valve means being limited between said step portion of said piston rod and said flanged portion of said fitting member.
Claim 14
Dependent Claim
97 words
valve means slidingly engaged between said fitting member and said chamber wall and operative to enable said pump to dispense fluid only on the downstroke of said piston rod by effecting communication of said fitting member side hole with said lower portion of said chamber during the downstroke of said piston rod, and sealing said fitting member side hole from said lower portion of said chamber during the upstroke of said piston rod, the travel of said valve means being limited between said step portion of said piston rod and said flanged portion of said fitting member.
Claim 15
Dependent Claim
37 words
The fluid-dispensing pump according to claim 2, wherein said valve means is generally conically shaped, with a wide portion engaging said chamber wall and a narrow portion having a flanged portion extending inwardly toward said piston rod.
Claim 16
Dependent Claim
34 words
The fluid-dispensing pump according to claim 2, wherein said valve means has a small middle portion and larger upper and lower portions, said upper and lower portions being in engagement with said chamber wall.
Claim 17
Dependent Claim
41 words
The fluid-dispensing pump according to claim 2, wherein said valve means effects a fluidtight seal with said step portion of said piston rod during downstroke and effects a fluidtight seal with said flanged portion of said fitting member during the upstroke.
Claim 18
Dependent Claim
15 words
The fluid-dispensing pump according to claim 2, wherein said movable sealing member is a ball.
Claim 19
Dependent Claim
17 words
The fluid-dispensing pump according to claim 2, wherein said movable sealing member is a nipple-shaped elastic body.
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) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |