Expansible pulley with torque and centrifugal response
US4095479A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 19, 1976 |
| Grant date | Jun 20, 1978 |
| Priority date | — |
| Expiry date | Jul 19, 1996 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H55/563
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A V belt pulley clutch assembly for a variable speed transmission which may be either the driving or the driven pulley, and which has one movable sheave which is both speed and torque responsive, and wherein the torque responsive portions comprise raised spiral ramps on the hub of the movable portion of the V belt pulley driven through saddle type members riding on the spiral ribs. The ribs are spiraled axially along the hub of the movable portion of the V belt pulley in a direction so that when the driven member is subjected to more load the unit tends to shift into a lower drive ratio. That is when the drive clutch assembly is powered from a drive shaft, the spirals are arranged so that the pulley halves tend to separate under increasing load on the belt. The ribs are on the external surface of a hub and can be die cast draft free for permitting driving and sliding between two relatively movable pulley halves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.