Walk-behind implement having wrap spring wheel clutches
US6681909B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 2, 2002 |
| Grant date | Jan 27, 2004 |
| Priority date | — |
| Expiry date | Apr 2, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D41/20
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A reversible implement including an engine, an axle driven by the engine, a pair of ground engaging wheels with a wheel located at each axle end, a pair of input hubs rotatably fixed to the axle, a pair of wheel hubs with a wheel hub located at each axle end and attached to a ground engaging wheel, and a wrap spring surrounding a portion of each input hub and each wheel hub. Each wrap spring has a relaxed state, wherein the wrap spring is in one of a first position in which the wrap spring is disengaged from the wheel hub, and the input and wheel hubs are not rotatively coupled and a second position in which the wrap spring is engaged with the wheel hub, and the input and wheel hubs are rotatively coupled, and a contracted state, wherein the wrap spring is in the other position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.