Fluid coupling device having improved temperature responsiveness
US4949825A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 5, 1990 |
| Grant date | Aug 21, 1990 |
| Priority date | — |
| Expiry date | Jun 5, 2010 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D35/023
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A rotary fluid coupling device is provided of the type including a first rotatable coupling assembly (13) comprising a housing member (15) and a die cast cover member (17). An input coupling member (11) is disposed in a fluid operating chamber (33) and cooperates with an adjacent surface of the cover member (17) to define a viscous shear space therebetween. When the shear space is filled with viscous fluid, torque can be transmitted from the input coupling to the output coupling, such torque transmission resulting in the generation of a substantial amount of heat adjacent the front surface of the cover member. The cover member (17) includes a generally annular portion (36) defining therein a reservoir chamber (35). Disposed within a recessed area defined by the annular portion (36) is a bimetal coil (45) which defines a coil circle C. The annular portion (36) of the cover includes a plurality of blower fin members extending radially inward to a location adjacent the coil circle C, each having an axial height H1 which is a major portion of an axial distance X from the forward surface of the cover member to the bimetal coil. The blower fins (71) generate a radially outward flow of ai…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.