Vehicle multispeed drive system utilizing arm and leg power
US4303255A · kind A · utility
Inventor
Key dates
| Filing date | Jan 4, 1980 |
| Grant date | Dec 1, 1981 |
| Priority date | — |
| Expiry date | Jan 4, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62K3/005
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A drive system for a vehicle permitting the use of an operator's arms and legs to power the vehicle. A multispeed hub assembly is offset from a powered wheel assembly and drives same with a roller chain. Arm and leg power is imparted respectively to a hand crankshaft and a live axle which power is transmitted to the multispeed hub via additional roller chains. A speed control for shifting the multispeed hub is actuated by handgrip rotation during normal hand crank operation to permit speed changes without release of either handgrip. A brake mechanism on the hand crankshaft actuates brake cables actuating caliper brakes upon reverse rotation of the hand crankshaft. The multispeed hub may include an internal coaster brake mechanism in one form of the invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.