Thermal actuated plant protection device with internal...

Details Thermal actuated plant protection device with internal... Thermal actuated plant protection device with internal...

2005-05-02

2010-06-22

Nguyen, Trinh T. (Department: 3644)

Plant husbandry

Cover, shade, or screen

Adjustable on supporting structure or having means allowing...

C047S029200, C047S019200, C047S903000

Reexamination Certificate

active

07739831

ABSTRACT:
A plant protection device having a ventilation opening shield that may be protectedly positioned between a housing and a mounting socket. A temperature sensitive actuator may be provided in the socket and the shield may pivotally move about the socket between a position impeding airflow through the ventilation opening and a position facilitating airflow through the ventilation opening. Various embodiments and features are disclosed including a reinforced housing, multi-part housing construction, and a shield mounting structure provided through the shield, among other features.

REFERENCES:
patent: 3946521 (1976-03-01), Ours
patent: 4233779 (1980-11-01), Griffith
patent: 5669177 (1997-09-01), Frounfelker
patent: 2002/0134010 (2002-09-01), Rohrborn et al.

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