The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 01, 1986
Filed:
Jul. 28, 1983
Robert A Pazar, Tacoma, WA (US);
David B Petrich, Tacoma, WA (US);
Other;
Abstract
A plant watering and/or feeding unit automatically and periodically dispenses water as needed. As assembled, an air tube extends essentially throughout the central length of a selected plastic bottle and beyond the other wise sealed cap entry of this plastic bottle for insertion of the extending, first heat sealed then partially cut opened, air tube end, down through the soil without being blocked by any entering soil, to contact the bottom of the earth filled plant container. A liquid orifice is located in the plastic bottle in its shoulder about midway between the entry and the side of the bottle. During plant watering and/or feeding cycles, liquid drips from the liquid orifice in the shoulder, until the water table in the soil, i.e. the liquid level in the soil, rises above the end of the partially opened air tube to seal off the entry of air. Then the dripping of liquid stops, until this liquid level goes below the end of the partially opened air tube. With the liquid seal broken once again the vacuum volume above the liquid level in the bottle becomes a pressure air volume, and liquid drips out the orifice and into the soil. This cycle continues until the prefilled volume of watering and/or feeding liquid is depleted.