Title:
Multiple torsion spring
Document Type and Number:
United States Patent 2481037

Inventors:
Pringle, Edward S.
Publication Date:
09/06/1949
View Patent Images:
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Assignee:
J G WILSON CORP
Primary Class:
Other Classes:
160/189, 414/913, 254/362, 267/155, 254/364
International Classes:
F16F3/04; F16F3/00
US Patent References:
0633328
0740114
1464294Counterbalanced hoisting mechanism
1723484Spring
2226017Closure
Foreign References:
AT85808B




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