1
Robert D Hennessey, Timothy G La Rocque: Hopper and filter chamber for direct forward throw sweeper. Tennant Company, Kinzer Plyer Dorn McEachran & Jambor, April 19, 1994: US05303448 (150 worldwide citation)

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 ...


2
Hennessey Robert D, Larocque Timothy G: Improved hopper and filter chamber for direct forward throw sweeper.. Tennant Co, January 12, 1994: EP0578442-A1 (3 worldwide citation)

In a direct forward throw sweeper (10), improvements related to a door (18) for closing the opening (16) into the hopper (12) permit backing away from a debris receptacle with the hopper door (18) open after dumping a load of debris without damage to the machine (10). Means (62,64) are provided for ...