Air velocity control mechanism for selective debris pickup

Details Air velocity control mechanism for selective debris pickup Air velocity control mechanism for selective debris pickup

1983-01-19

1984-08-21

Moore, Chris K.

Brushing, scrubbing, and general cleaning

Machines

With air blast or suction

E01H 108

Patent

active

044661568

ABSTRACT:
An air flow control mechanism is provided in the debris pick-up head (10) of a sweeper to allow selective sweeping of debris. The pick-up head (10) is provided a center skirt (70) which partitions the head interior into two sweeping chambers, a rearward chamber (74) and a forward chamber (75). A filler piece (76) in the rearward chamber (74) lowers the ceiling of the chamber (74) sufficiently to create an air flow velocity differential between the two chambers. Forced air flow directed into the rearward chamber (74) becomes high-velocity, air flow capable of transporting relatively heavy debris to a suction outlet (66) for removal to a collection hopper (13). The forward chamber (75) has low-velocity air flow therethrough for sweeping relatively lighter debris to the suction outlet (66). The air flow control mechanism is adjustable to allow effective sweeping for various combinations of debris densities and sizes. Further, a nozzle-like head (63) introduces the forced air into the pick-up head (10) in a manner which induces the air flow to swirl about the area prior to flowing into the rearward chamber (74) thus achieving a sweeping path the full width of the pick-up head.

REFERENCES:
patent: 2932845 (1960-04-01), Rydberg
patent: 3054130 (1962-09-01), Ferrari
patent: 3512206 (1970-05-01), Young
patent: 3545181 (1970-12-01), Young
patent: 3662427 (1972-05-01), Hanna
patent: 4099290 (1978-07-01), Hiszpanski
patent: 4110864 (1978-09-01), Gunnarsson
patent: 4359801 (1982-11-01), Tate

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