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US4700507A Expired / Lapsed US ⏱️ 0.0 years remaining

Tree bark protector

Assignee: Individual
•
Filing: 1986-03-31
•
Granted: 1987-10-20
•
Expires: 2006-03-31
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Abstract

Abstract A shield made of high impact polyurethane plastic, molded in two half sections which can be fitted over the base portion of a tree trunk where it widens into the soil. The shield includes anchors for a bottom flange and provides for enlarging a top, flange defined hole. The facing edges of the half sections accommodate molded locking connectors in enlarged or swollen portions.

Inventors

  • 👤 Charles R. Allen

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-08 02:37
CPC Classifications
A; A01; A01G; A01G13/00; A01G13/20; A01G13/28; A01G13/27

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 245 words
A shield assembly for protecting bark on the basal portion of a tree from the girdling action of lawn trimming equipment, comprising, in combination: two identical half sections of molded high impact polyurethane plastic; at least one aperture in a ground contacting portion of each half section; a spike for inserting through each said aperture for anchoring the assembled shield in its protecting position, the improvement comprising: the shield assembly having a cylindrical upper portion which gradually tapers downwardly and outwardly to an outwardly directed horizontal flange, said flange adapted to seat on the ground surface, said aperture located within the extent of said flange; a horizontal, internally formed second flange extending inwardly from the top edge of the cylindrical upper portion and defining a central hole through which the trunk of a tree may extend, said second flange including at least one concentric V-shaped groove spaced between said top edge and said central hole to define at least one removable flange section, whereby the hole can be enlarged by removal of said removable flange section, to accommodate a larger tree trunk; the facing edges of each half section including facing swollen wall portions, said swollen wall portions including apertures for receiving molded locking connector means; and, molded locking connector means for interconnecting said facing edges of each half section, whereby, the half sections may be connected over the enlarged basal portion of a tree to shield the bark against contact by lawn trimming equipment.
Claim 2
Dependent Claim 245 words
A shield assembly for protecting bark on the basal portion of a tree from the girdling action of lawn trimming equipment, comprising, in combination: two identical half sections of molded high impact polyurethane plastic; at least one aperture in a ground contacting portion of each half section; a spike for inserting through each said aperture for anchoring the assembled shield in its protecting position, the improvement comprising: the shield assembly having a cylindrical upper portion which gradually tapers downwardly and outwardly to an outwardly directed horizontal flange, said flange adapted to seat on the ground surface, said aperture located within the extent of said flange; a horizontal, internally formed second flange extending inwardly from the top edge of the cylindrical upper portion and defining a central hole through which the trunk of a tree may extend, said second flange including at least one concentric V-shaped groove spaced between said top edge and said central hole to define at least one removable flange section, whereby the hole can be enlarged by removal of said removable flange section, to accommodate a larger tree trunk; the facing edges of each half section including facing swollen wall portions, said swollen wall portions including apertures for receiving molded locking connector means; and, molded locking connector means for interconnecting said facing edges of each half section, whereby, the half sections may be connected over the enlarged basal portion of a tree to shield the bark against contact by lawn trimming equipment.

References Cited (Backward Citations)

US574998A Cited
US3857195A Cited
US3940884A Cited
US4268992A Cited
GB2168582A Cited
US4648203A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1990-10-19 1991-04-20 1991-10-20 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1994-10-19 1995-04-20 1995-10-20 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1998-10-19 1999-04-20 1999-10-20 $7700.00 Window Closed / Lapsed

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