05303448 is referenced by 146 patents and cites 11 patents.

In a direct forward throw sweeper, improvements related to a door for closing the opening into the hopper permit backing away from a debris receptacle with the hopper door open after dumping a load of debris without damage to the machine. An attachment part is provided for connecting a vacuum pickup wand to the debris hopper. Associated improvements to a related air filter chamber provide improved dust control while dumping the hopper and convenient access for servicing a dust accumulation space in the bottom of the filter chamber.

Title
Hopper and filter chamber for direct forward throw sweeper
Application Number
7/910634
Publication Number
5303448
Application Date
July 8, 1992
Publication Date
April 19, 1994
Inventor
Timothy G La Rocque
Plymouth
MN, US
Robert D Hennessey
Golden Valley
MN, US
Agent
Kinzer Plyer Dorn McEachran & Jambor
Assignee
Tennant Company
MN, US
IPC
E01H 1/08
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