Snowthrower
US4295285A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 17, 1979 |
| Grant date | Oct 20, 1981 |
| Priority date | — |
| Expiry date | Dec 17, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H27/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An improved snowthrower (2) comprises a housing (4) having a rotatable impeller (6) therein. Impeller (6) is rotationally molded from plastic and is easily replaceable in housing (4). Moreover, impeller (6) includes a plurality of snow impelling blades (60) which are sufficiently rigid to transmit a drive torque from one side wall (63) to the other side wall (62) of impeller (6). Thus, impeller (6) does not require the use of a through shaft. In addition, snowthrower (2) includes a switch (93) for actuating the drive motor (8). Switch bar (96) is movable to cause switch (93) to close. However, lockout member (110) can be positioned in engagement with switch bar (96) to prevent inadvertent or accidental actuation of switch (93). Lockout member (100) is moved to a non-locking position only when a key member (116) is inserted into a control grip (112).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.