Bolted double sickle cutterbar

Details Bolted double sickle cutterbar Bolted double sickle cutterbar

A - Human Necessities

01

D

A01D 34/13 (2006.01) A01D 34/14 (2006.01)

Patent

CA 2041170

A reciprocating cutterbar of the type utilizing a pair of counter-reciprocating sickles driven at the opposing outboard ends and overlapping at the inboard ends thereof is disclosed wherein the knife sections are detachably affixed to the respective support bars of these sickles by special threaded fasteners to permit the overlapped knife sections to maintain a close shearing relationship. These special threaded fasteners include a head portion adapted to be countersunk into the body of the knife section below the surface thereof, a threaded portion adapted to be threadably engaged with a nut to effect a clamping load between the knife section and support bar, and an intermediate portion having a non-circular cross-sectional configuration engageable with a corresponding non-circular opening formed in the support bar to restrict rotation thereof when the fastener is engaged therewith. The head portion of the fastener includes a chamfered surface engageable with a corresponding chamfered surface surrounding the hole through the knife section to permit the fastener to firmly engage the knife section while being countersunk therein.

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