Chain – staple – and horseshoe making – Chain making – Blanks and processes
Patent
1980-09-29
1992-09-01
Spruill, R. L.
Chain, staple, and horseshoe making
Chain making
Blanks and processes
59 86, B21L 1300, F16G 1506
Patent
active
RE0340464
ABSTRACT:
A heavy duty shackle for use under great loads, such as in anchor lines. The shackle is formed from a cylindrical bar rod by shaping the ends to a reduced diameter, and forging the central portion into a flattened shape having the cross-section of a wide shallow U shape. The bottom surface of the central section is in the form of a portion of a circular cylinder. The ends of the bar are flattened and a central opening is forged and based for a pin. The formed bar is then bent in the form of a bow to provide an eye for the shackle, with two parallel ears spaced a selected distance apart.
REFERENCES:
patent: 199073 (1878-01-01), Kinney
patent: 2420256 (1947-05-01), MacKenzie
patent: 2709616 (1955-05-01), Larson
patent: 2749610 (1956-06-01), Welsch
patent: 3319990 (1967-05-01), Beal
Crosby-Laughlin Catalog 950-5, 1968, p. 26 Boom Pendant Clevis Model S420.
Nicro/Fico Catalog 1970-75.
Schaeffer Marine Products Headboard Shackle, Marine Hardware Show--Chicago, 9-1975 (not for general public).
F. B. Mallory Company Catalog No. 10, 1921 pp. 148, 149 and 179 Portland, OR.
Mallory Logging Equipment Company Catalog No. 50, 1950, pp. 36 and 37 Portland, OR.
The Shookum Company, Inc. 1946 Catalog, pp. 53 and 54 Portland, OR.
Paul Sowa & Son Catalog No. 56 1956 pp. D-G & J Woodburn, OR.
Young Iron Works Catalog 1955, pp. 76, 77 and 87.
Riggers Handbook--1973--Broderick & Bascom Rope Company, St. Louis, MO.
Newco Catalog No. 74, Jan. 1974.
American Hoist and Derrick Company
Spruill R. L.
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