Overhead closure safety halting system and actuator therefor
United States Patent 3001038
US Patent References:
Air operated device
- - 2221216
Moving apparatus and control therefor
- - 2401082
Door operating device
- - 2703235
Door operating mechanism
- - 2789636
Air operated device
- - 2221216
Moving apparatus and control therefor
- - 2401082
Door operating device
- - 2703235
Door operating mechanism
- - 2789636
Inventors:
Gessell, Glenn P.
Publication Date:
09/19/1961
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Assignee:
Gessell, Glenn P.
Primary Class:
Other Classes:
160/201, 160/188, 49/27
International Classes:
E05F15/00