Excavating – Snow or ice removing or grooming by portable device – Vehicle mount with obstacle responsive trip – or yieldable tool
Patent
1988-04-15
1990-03-20
Burr, Edgar S.
Excavating
Snow or ice removing or grooming by portable device
Vehicle mount with obstacle responsive trip, or yieldable tool
37244, E01H 509
Patent
active
049089684
ABSTRACT:
A snowthrower (10) having an improved impeller (20). Impeller (20) preferably includes a central rotating shaft (34) which fixedly supports at either end thereof an end member (46) and rotatably supports proximate its center a center bracket (48) wherein elements (46) and (48) support one or more one-piece flexible curved paddles (36). In operation, when rotating impeller (20) encounters a foreign object (70), shaft (34) and end members (46) continue to turn while center bracket (48) rotates to some degree on shaft (34) to allow the center sections (38) of paddles (36) to twist and flex relative to shaft (34) and end members (46), thereby permitting center sections (38) of paddles (36) to easily ride up and over obstruction (70). This minimizes the shock associated with impact of the rotating impeller (20) with obstruction (70), and prevents stalling of the prime mover (18) of snowthrower (10).
REFERENCES:
patent: 1601718 (1926-10-01), Buttweiler
patent: 3086304 (1963-04-01), La Tendresse
patent: 3313049 (1967-04-01), Blozis
patent: 3359661 (1967-12-01), Speiser et al.
patent: 3429060 (1969-02-01), Merry
patent: 3429061 (1969-02-01), Haban
patent: 3747240 (1973-07-01), Salo
patent: 3800448 (1974-04-01), Preston
patent: 3805421 (1974-04-01), Kamlukin et al.
patent: 4346526 (1982-08-01), Mattson et al.
patent: 4694594 (1987-09-01), Thorud et al.
Brochure entitled "The Toro S-120 Snowthrower", Form No. HID-A010-A.
Thorud Richard A.
Tillotson Henry B.
Buckley R. Lawrence
Burr Edgar S.
Cohen Moshe I.
The Toro Company
LandOfFree
Snowthrower with resilient impeller does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Snowthrower with resilient impeller, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Snowthrower with resilient impeller will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-783609