Clutches
US7513350B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 13, 2004 |
| Grant date | Apr 7, 2009 |
| Priority date | — |
| Expiry date | Jan 13, 2025 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D2048/0284
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A clutch including two rotary shafts, one of which is connected to one or more first clutch plates which cooperate with a second set of clutch plates, the clutch plates acted on by an actuating piston positioned within a two chamber hydraulic cylinder. A torque control valve comprising a cylindrical inner valve member rotatably and linearly movably received in a cylindrical opening in an outer valve member. Each valve member having elongate recesses positioned such that longitudinal movement of the inner valve member within the outer valve member will vary the degree of communication between the first and second elongate recesses connected to two hydraulic fluid sources of differing pressures. The second clutch plates are connected to one side of a spring of predetermined spring rate, which is also connected to one of the valve members, and the other side of the spring is connected to the other of the valve members and to the other rotary shaft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.