Back to results
US 4,726,143 AGranted
Root fertilizing device
OwnerJohn Steinbeckinventor
Life of this patent
Estimating the term…
Abstract
The device is a cylindrical housing enclosing a spaced apart cylindrical receptacle for fertilizer. Metering rings channel rain water towards the fertilizer but prevent fertilizer from exiting the top of the housing. End grates enclose the open ends of the housing, the top grate containing a water permeable filter to prevent clogging of the device by foreign debris.
Claims8
An underground root fertilizing device comprising:
- (a) an outer cylindrical housing having an exterior face and inner face, the housing being open at a top end and at a bottom end,
- (b) means mounting an inner cylindrical receptacle within but spaced apart from the inner face of the housing, the receptacle having an exterior and inner wall surface with a plurality of notches, the notches extending through the wall of the receptacle at first and second open ends of the cylindrical receptacle,
- (c) a top metering ring mounted around the first open end of the receptacle, a top surface of the top metering ring tapering in a downward direction from the inner face of the housing,
- (d) a bottom planar metering ring mounted around the second open end of the receptacle,
- (e) a top grate having a top and bottom surface with a plurality of holes through the grate and a water permeable filter covering the bottom surface of the grate, the top grate enclosing the open top end of the housing,
- (f) a bottom grate having a plurality of holes adjacent an outer edge of the bottom grate, the bottom grate enclosing the open bottom end of the housing, and
- (g) means removably connecting the top grate to the open top, whereby the receptacle can be filled with fertilizer by removing the top grate.
4 more elements
Dependencies are inferred from the claim text.