Title:
PIVOTALLY MOUNTED GRAVITY ACTUATOR
United States Patent 3508631


Inventors:
Purdy, Frederick A.
Application Number:
US3508631DA
Publication Date:
04/28/1970
Filing Date:
12/31/1968
Assignee:
Purdy, Frederick A.
Primary Class:
International Classes:
E05F15/10; E05F15/16; E05F15/20; (IPC1-7): F03G3/00
View Patent Images:
US Patent References:
2365072Sand timing instrument1944-12-12
0800607N/A1905-09-26
0441661N/A1890-12-02