04430952 is referenced by 55 patents and cites 2 patents.

A row crop planter unit (11) is supported by a pair of laterally spaced wheel and disc assemblies (56, 57) mounted on corresponding ends of a pair of walking beams (58, 59). The other corresponding ends of the walking beams (58, 59) are interconnected by an equalizer mechanism (76) which includes a cable (91) and vertically adjustable pulley (77).

Title
Planter gauge wheels with adjustable equalizer mechanism
Application Number
6/415150
Publication Number
4430952
Application Date
September 7, 1982
Publication Date
February 14, 1984
Inventor
David L Murray
La Porte
IN, US
Agent
Charles L Schwab
Assignee
Allis Chalmers Corporation
WI, US
IPC
A01C 5/06
View Original Source