OutdoorKing Repair Forum Forums The History Forum Personal Histories ROY KNIGHT and the Scott Bonnar Company

PART FOUR � Patent 40190 � Grass Catcher Securing Means.
This 1972 patent demonstrates Roy Knight�s continuing contribution to rotary design.
In particular, this patent relates to the sealing and safety flap engagement on high-arch
rear discharge lawnmowers fitted with grass catchers.

Roy gave us an elegant, safe and simple solution to catcher fitting,
flap engagement and catcher removal. Brilliant!

This patent most certainly went into production and featured on Scott Bonnar
Models 720 and 520 lawnmowers. These were Scott Bonnar�s first and last high-
arch design series. Introduced in late 1971 for the 1972 season, these machines
would remain in production until the early 1980s when Adelaide manufacture ceased.