Automatic plant growing and harvesting system

• US 5,956,897 A
• Filed: 07/10/1998
• Issued: 09/28/1999
• Est. Priority Date: 07/11/1997
• Status: Expired due to Fees

• Current Assignee: Yasukazu Takashima
• Original Assignee: Yasukazu Takashima
• Inventors: Takashima, Yasukazu
• Primary Examiner(s): Carone, Michael J.
• Assistant Examiner(s): Gellner, Jeffrey L.
• Application Number:
  US09/113,245
• Time in Patent Office: 445 Days
• Field of Search: 47/1.01 R, 47/17, 47/58.1, 47/60, 47/62.12
• US Class Current: 47/60
• CPC Class Codes: A01G 31/00 Soilless cultivation, e.g. hydroponics growth substrates therefor A01G24/00; cultivation of seaweed A01G33/00

Abstract

An automatic plant growing and harvesting system 10 which can be used in either zero gravity or full Earth gravity conditions for controlled growth of plants 14, The system 10 includes an enclosure 12 which is adapted to allow at least one plant 14 to grow within, where the plants 14 each generally have a stem 56, foliage 52 and a root portion 58. The system 10 includes an illumination system 27, a material supply system 60 having a nutrient supply 72 and a water supply 70. The system 10 also includes a root chamber 50, a retractor assembly 46 for controllably retracting a lower portion of the plant stems 56 into the root chamber 50, a harvesting assembly 102 and a controller 100 which directs the actions of the included systems and assemblies. The system 10 is provided with a variable speed fan 26 to aid in produce harvesting and self-pollination, and a gravity compensator 114 for preventing water vapor accumulation in stagnant areas. A self-contained potable water system 91 is included which cooperates with the material supply system 60 as gray water is fed to the roots 58, and transpirated water vapor from the plants'"'"' foliage 52 is collected and condensed to produce potable water. The enclosures 12 may be grouped in collective structures 154, which may be illuminated by a collective light source 158.

Claims

1. An automatic plant growing and harvesting system which can be used in either zero gravity or full Earth gravity conditions for controlled growth of plants, said plants each generally having a stem, foliage and a root portion, said system comprising:

a first enclosure, said first enclosure being adapted to allow at least one plant to grow therewithin;

an illumination system for providing and delivering photosynthetic usable energy to the plants;

a material supply system within a second enclosure for selectively providing nutrients and delivering growth fluids to the plants within said first enclosure, said material supply system including a nutrient supply and a water supply, said material supply system being fully enclosed within said second enclosure;

a root chamber for containing the root portions of said plants;

a retractor assembly for controllably retracting a lower portion of said plant stems into said root chamber;

a harvesting assembly for removing and delivering produce from said plants as said produce matures; and

a controller which directs the actions of said illumination system, said material supply system, said retractor assembly and said harvesting assembly.

2. An automatic plant growing and harvesting system as in claim 1, wherein:

said root chamber includes a root trimmer assembly which selectively removes the oldest portion of said root portions when roots achieve a predetermined length.

3. An automatic plant growing and harvesting system as in claim 2, wherein:

said root chamber further includes a desiccation chamber which dries the trimmed root portions after removal.

4. An automatic plant growing and harvesting system as in claim 1, wherein:

said harvesting assembly includes a cutting blade subassembly.

5. An automatic plant growing and harvesting system as in claim 4, wherein:

said cutting blade subassembly includes a means for swiftly detaching branches from plant stems.

6. An automatic plant growing and harvesting system as in claim 5, wherein:

said means for swiftly detaching branches from plant stems includes a solenoid, a spring, a swing arm and a micro-switch, said spring acting to bias said swing arm away from contact with said microswitch until a branch has pushed said swing arm to contact said micro-switch, activating said solenoid to swiftly push said cutting assembly through the branch.

7. An automatic plant growing and harvesting system as in claim 1, wherein:

said harvesting assembly includes a basin connected to a harvesting tube, whereby branches and produce may be collected after harvesting.

8. An automatic plant growing and harvesting system as in claim 7, wherein:

said automatic plant growing and harvesting system includes a variable speed fan, which aids in urging harvested produce into said harvesting basin and said harvesting tube, after said produce has been detached from a plant stem.

9. An automatic plant growing and harvesting system as in claim 1, wherein:

said automatic plant growing and harvesting system includes a variable speed fan, which aids in self-pollenation.

10. An automatic plant growing and harvesting system as in claim 1, wherein:

said automatic plant growing and harvesting system includes a shaker motor attached to a stem of said plant matter, which aids in self-pollination.

11. An automatic plant growing and harvesting system as in claim 1, wherein:

said retractor assembly includes a pinch roller subassembly.

12. An automatic plant growing and harvesting system as in claim 11, wherein:

at least one sensor is included to detect plant growth and inform said controller, which activates said pinch roller subassembly so that plant retraction is achieved at a same rate as plant growth.

13. An automatic plant growing and harvesting system as in claim 1, wherein:

said automatic plant growing and harvesting system includes a gravity compensator to provide increased air pressure to sweep water condensation from stagnation points in low gravity.

14. An automatic plant growing and harvesting system as in claim 1, wherein:

said illumination system includes plastic rods which direct light into said enclosure.

15. An automatic plant growing and harvesting system as in claim 1, wherein:

said automatic plant growing and harvesting system includes a self-contained potable water system which cooperates with said material supply system to convert gray water input to potable water output by providing gray water to the root portions of plants through said material supply system and collecting and condensing transpired water vapor from the foliage of plants in the potable water system.

16. An automatic plant growing and harvesting system as in claim 1, wherein:

said first enclosure is one of a plurality of first enclosures which are configured as modules of a larger assemblage of modules.

17. An automatic plant growing and harvesting system as in claim 16, wherein:

said modules are grouped to be illuminated by a common illumination source.

18. An automatic plant growing and harvesting system as in claim 16, wherein:

said modules are configured to pivot to allow easy access to the interior of said module.

19. A method of automatically growing and harvesting plant matter, which can be used in either zero gravity or full Earth gravity conditions for controlled growth of plants, said method comprising:

(1) providing a first enclosure which is adapted to allow at least one plant to grow therewithin, an illumination system for providing and delivering photosynthetic usable energy to the plant matter, a material supply system within a second enclosure for selectively providing nutrients and delivering growth fluids to the plant matter within said first enclosure, said material supply system including a nutrient supply and a water supply, said material supply system being fully enclosed within said second enclosure, a root chamber for containing root portions of said plants, a retractor assembly for controllably retracting said plants into said root chamber, a harvesting assembly for removing and delivering produce from said plants as the produce matures and a controller which directs the actions of said illumination subsystem, said material supply system, said retractor assembly and said harvesting assembly;

(2) positioning a plant which has a root portion, foliage and a stem, so that the root portion is directed into said root chamber, the foliage is contained within said enclosure, and the stem is gripped by said retractor assembly;

(3) illuminating said plant foliage with light from said illumination system;

(4) providing nutrients and growth fluids to said root portion by using said material supply system;

(5) controlling the actions of said illumination system, said material supply system, said retractor assembly and said harvesting assembly automatically by using said controller to obtain maximal growth of said plant; and

(6) harvesting produce from said plant automatically as produce matures by using said harvesting assembly, as directed by said controller.

20. A method of automatically growing and harvesting plant matter, as in claim 19, in which step (5) further comprises the steps of:

(a) providing sensors which report plant growth to said controller; and

(b) retracting the lower portion of the plant stem into said root chamber at a same rate as said plant grows and is detected by said sensors.

21. A method of automatically growing and harvesting plant matter, as in claim 19, in which step (6) further comprises the steps of:

(a) providing said harvesting assembly with a basin, a harvesting tube and a variable speed fan; and

(b) activating said variable speed fan to urge harvested produce into said basin and said harvesting tube, so that produce may be easily collected.

22. A method of automatically growing and harvesting plant matter, as in claim 19, in which step (1) further comprises the steps of:

(a) providing said automatic plant growing and harvesting system with a gravity compensator; and

(b) activating said gravity compensator to increase air pressure to sweep water condensation from stagnation points in low gravity.

23. A method of automatically growing and harvesting plant matter, as in claim 19, in which step (1) further comprises the steps of:

(a) providing a potable water supply system;

(b) providing potable water by providing gray water to the root portions of plants through said material supply system and collecting and condensing transpired water vapor from the foliage of plants in the potable water system.