Title: Double flexing chain

Abstract: A block and bar chain of the trolley conveyor type includes a center link having U-shaped bushing inserts at the ends of the link. The inserts with the center link are respectively turnable on the pins; the center link is pivotable on either insert about a separate axis normal to that of the pins. The improved double flexure of the chain reduces the stress in the chain parts comprising the joint and in turn allows the center link and the inserts in particular to be of a molded plastic construction of the required configuration. The inserts have pivot and retaining means and their plastic construction permits their "snap-in" assembly.

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Inventors: Theijsmeijer, Frederik (Racine, WI, US)

Application Number: 816243
Filing Date: 1977-07-18
Publication_date: 1979-04-24
Assignee: Rexnord Inc. (Milwaukee, WI)
Primary Class(es): 198/852 474/211
Other Classes:
US Patent Ref:

1660354	Feb, 1928	Phelps	74/254.
1748334	Feb, 1930	Evans	74/254.
1825675	Oct, 1931	Morse	74/251.
1866318	Jul, 1932	Muhlenbruch	74/246.
2004321	Jun, 1935	Hay	74/246.
2332408	Oct, 1943	Stenger	74/254.
2612056	Sep, 1952	Pro, Jr. et al.	74/254.
2638009	May, 1953	Beveridge	74/254.
2816453	Dec, 1957	Frank et al.	74/251.
3056308	Oct, 1962	Burrows	74/254.

Other Refs: 2103232962911189949

Aug, 1907	DE
Aug, 1928	GB
Apr, 1970	GB

Primary Examiner: Scott, Samuel
Assistant Examiner: Henderson, William R.
Attorney: