Implement with tool frame selectively lockable in vertical posit

Details Implement with tool frame selectively lockable in vertical posit Implement with tool frame selectively lockable in vertical posit

1986-11-28

1988-04-19

Stouffer, Richard T.

Earth working

Plural relatively movable tools

Plural tool groups relatively vertically movable because of...

172662, 172674, 403 92, A01B 6326

Patent

active

047383178

ABSTRACT:
Locking structure for securing a four-bar linkage or the like on an implement in a raised position to remove an earthworking tool or row unit from ground engagement. An overcenter spring arrangement selectively biases a strap pivotally connected to one arm of the linkage toward or away from a member located on the opposite arm. When the strap is biased toward the member, raising the tool or row unit causes the strap to engage the member to prevent rocking of the linkage and thereby secure the device out of ground contact. Reversing the spring arrangement and raising the device causes the strap to move out of locking engagement with the member for normal operation. An elongated device includes pins for aiding the operator in both moving the over-center spring arrangement between positions and raising the tool or row unit.

REFERENCES:
patent: 2670672 (1954-03-01), Markel
patent: 3503625 (1970-03-01), Muller et al.
patent: 4632595 (1986-12-01), Schaeff
patent: 4660654 (1987-04-01), Wiebe et al.

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