Patent US4189867A successfully refreshed from Google Patents.
US4189867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydroponic unit
Assignee: Individual
•
Filing: 1978-01-18
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Granted: 1980-02-26
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Expires: 1998-01-18
Abstract
Abstract A plastic tray having short legs and a perforated bottom fits securely within a plastic container, the tray being adapted for carrying vermiculite and the container being adapted for holding nutrient solution. The tray also has an enlarged upper portion defining a channel-shaped inner ledge between the enlarged and unenlarged portions thereof. An electric pump is disposed within a compartment of the tray, and a plastic tube runs from the pump into the nutrient solution and up the wall of the tray to the channel-shaped ledge, into which it snaps along the sides of the tray. The tube is perforated where it contacts the nutrient solution, and has a series of apertures along the portion snapped to the walls of the tray, such that a mixture of air and nutrient solution can be pumped through the tube into the vermiculite.
Inventors
- 👤 Stuart Schneck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:20
CPC Classifications
A; A01; A01G; A01G31/00; A01G31/02; Y; Y02; Y02P; Y02P60/00; Y02P60/20; Y02P60/21
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
210 words
A hydroponic unit comprising: a container for holding nutrient solution; a tray for holding growing medium, the tray having a perforated bottom and a lower portion shaped to fit securely within the container and to define an enclosed space for nutrient solution between the underside of the tray bottom and the upper surface of the container bottom, an air pump contained entirely within the tray in a compartment positioned above the enclosed space between the tray and container and below the top of the tray; and a tube running from the pressure side of the pump downwardly into the enclosed space between the tray and container and then up the side of the tray to an upper level thereof, and along a peripheral supporting ledge on the inner sidewalls of the tray, said tube having a series of spaced-apart liquid exit apertures along the portion of the tube disposed at the upper level of the tray, and at least one liquid entry aperture at the portion which extends into the enclosed space between the tray and container, such that pressurized air flowing through the tube draws nutrient solution into the tube through the liquid entry aperture and dispenses an air-nutrient solution into said growing medium through the liquid exit apertures.
Claim 2
Dependent Claim
210 words
A hydroponic unit comprising: a container for holding nutrient solution; a tray for holding growing medium, the tray having a perforated bottom and a lower portion shaped to fit securely within the container and to define an enclosed space for nutrient solution between the underside of the tray bottom and the upper surface of the container bottom, an air pump contained entirely within the tray in a compartment positioned above the enclosed space between the tray and container and below the top of the tray; and a tube running from the pressure side of the pump downwardly into the enclosed space between the tray and container and then up the side of the tray to an upper level thereof, and along a peripheral supporting ledge on the inner sidewalls of the tray, said tube having a series of spaced-apart liquid exit apertures along the portion of the tube disposed at the upper level of the tray, and at least one liquid entry aperture at the portion which extends into the enclosed space between the tray and container, such that pressurized air flowing through the tube draws nutrient solution into the tube through the liquid entry aperture and dispenses an air-nutrient solution into said growing medium through the liquid exit apertures.
Claim 3
Dependent Claim
47 words
The hydroponic unit of claim 1 wherein the tray has short legs and an enlarged upper portion defining a channel-shaped ledge between the enlarged and unenlarged poritons of the tray, such that the tube can be snapped into the channel-shaped portion along the sidewalls of the tray.
Claim 4
Dependent Claim
34 words
The hydroponic unit of claim 2 additionally comprising a fill door disposed adjacent to the pump above the enclosed space and providing access to the enclosed space for filling said space with nutrient solution.
Claim 5
Dependent Claim
39 words
The hydroponic unit of claim 1 wherein the tube portion extending into the enclosed space between the tray and container has two pairs of aligned holes drilled through adjacent walls thereof, for entry of nutrient solution into the tube.
Claim 6
Dependent Claim
42 words
The hydroponic unit of claim 1 wherein the pump and tubing can be removed from the tray, and the bottom of the tray is provided with a plurality of pre-formed aperture blanks which can be removed for insertion of a wick therethrough.
Claim 7
Dependent Claim
16 words
The hydroponic unit of claim 1 wherein the tray, container and tubing are molded of plastic.
Claim 8
Dependent Claim
13 words
The hydroponic unit of claim 1 wherein the unit has a box-like shape.
Claim 9
Dependent Claim
30 words
The hydroponic unit of claim 1 wherein the tray bottom completely covers the container, such that there is no exposure to sunlight and consequent formation of algae in the container.
References Cited (Backward Citations)
SU212661A1
Cited
GB190011890A
Cited
US1491057A
Cited
US2306027A
Cited
US2278991A
Cited
US2709838A
Cited
US2776642A
Cited
US3018758A
Cited
FR1464181A
Cited
GB1192431A
Cited
US3550319A
Cited
US3766684A
Cited
US3738060A
Cited
DE2222505A1
Cited
US4057930A
Cited
US4016677A
Cited
US3992809A
Cited
US4021964A
Cited
US4083147A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-02-25 | 1983-08-27 | 1984-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-25 | 1987-08-27 | 1988-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-25 | 1991-08-27 | 1992-02-26 | $7700.00 | Window Closed / Lapsed |