Ridge ventilator door
This patent describes a ridge ventilating device for regulating air flow through a ridge passage in the roof of a building, which comprises: (a) first and second elongate opposed door panels on parallel hinges for attachment to the roof of the building; (b) an elongate actuating unit depending from the door panels and having a mounting pivot for attachment to the interior roof structure of the building. The elongate actuating unit has a pair of elongate upright connecting links with upper ends each pivotally connected to one of the doors. Lower ends pivotally connects together by a common pivot by which upward thrust may be imparted to the links. The actuating unit has an elongate extensible and retractable means with an upper end connected to the common pivot and a lower end connected to the mounting pivot to open and close the doors in response to extension and retraction of the extensible and retractable means.
- Assignee:
- Willmar Poultry Co., Inc., Willmar, MN
- Patent Number(s):
- US 4683811
- OSTI ID:
- 6145228
- Resource Relation:
- Patent File Date: Filed date 18 Nov 1985
- Country of Publication:
- United States
- Language:
- English
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