Patent ID: 11895946
Assignee: HUSQVARNA AB
Field: Other special machines (Mechanical engineering)
Classification: CPC A | IPC A

Claim 6:
7. The reciprocating mower unit of claim 1, wherein the crank mechanism comprises, for each of the mowing blades, a respective four-bar linkage configured to oscillate the respective blade in response to rotation of the gear output shaft, each of the four- bar linkages comprising
a fixed link between a rotation axis of the gear output shaft and the common oscillation axis;
a respective input link configured as a crank attached to the gear output shaft;
a respective output link configured as a crank j ournaled to pivot about the common oscillation axis; and
a respective coupler link interconnecting the respective input and output links, wherein, for each of said four-bar linkages, a link ratio between the input link and the fixed link of at least 1:10.