Single stage snowthrower impeller

Details Single stage snowthrower impeller Single stage snowthrower impeller

1990-02-02

1995-03-21

Taylor, Dennis L.

Excavating

Snow or ice removing or grooming by portable device

Motorized rotary excavating tool

37254, 37247, 37258, E01H 509

Patent

active

053984315

ABSTRACT:
A snowthrower (20) including an improved impeller (50) which has an "open center" configuration and which is substantially made from a single piece of plastic. Impeller (50) includes a pair of curved blades (60) which are supported, braced and stiffened by a plurality of "spiders" (62, 64, 66, 68, 72, 74, 76 and 78) which form recesses for receiving a shaft (42) which spans between the side walls (36) of the snowthrower housing (22). Curved blades (60) of impeller (50) extend transversely between a pair of somewhat circular plates (52, 54). Plates (52, 54) preferably include teeth (54b, 54c, 52b, 52c) which help to break up snow and ice and assist in propelling snowthrower (20).

REFERENCES:
patent: 2642680 (1953-06-01), Curtis et al.
patent: 2714772 (1955-08-01), Erickson
patent: 3359661 (1967-12-01), Speiser et al.
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patent: 3603008 (1971-09-01), Heth
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patent: 4322896 (1982-04-01), Miyazawa et al.
patent: 4325195 (1982-04-01), Comer
patent: 4651452 (1987-03-01), Husso
patent: 4694594 (1987-09-01), Thorud et al.

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