Title:
Tower crane attachment
United States Patent 3037641


Inventors:
Potter, Kenneth F.
Brown, Archer W.
Application Number:
US9169261A
Publication Date:
06/05/1962
Filing Date:
02/27/1961
Assignee:
AMERICAN HOIST & DERRICK CO
Primary Class:
International Classes:
B66C23/34; B66C23/36; B66C23/92
View Patent Images:
US Patent References:
2924341Pulley assembly for cranes1960-02-09
Foreign References:
DE810893C1951-08-13
DE15173C