04044422 is referenced by 14 patents and cites 4 patents.

A street sweeper with an air recirculation type pickup hood includes a vehicle mounted hopper, a blower and a debris pickup hood extending transversely across a swept surface. The blower withdraws air from the hopper and delivers it to one end of the hood and an air stream and entrained debris leave the other end of the hood through an air return line connected to the hopper. Relatively narrow surface engaging sealing flaps extend along the front and rear sides of the hood. At one end of the hood an air lock is provided having a pair of sequentially operating air lock doors for admitting large articles of debris such as cans or bottles that are windrowed to the entrance of the air lock by an angled deflector.

Title
Sweeper pickup hood with air lock
Application Number
5/647521
Publication Number
4044422
Application Date
January 8, 1976
Publication Date
August 30, 1977
Inventor
Gregory J Larsen
Claremont
CA, US
Agent
C E Tripp
Assignee
FMC Corporation
CA, US
IPC
A47L 5/14
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