Slip clutch with slip detector and electrical disconnect
US4605107A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 12, 1983 |
| Grant date | Aug 12, 1986 |
| Priority date | — |
| Expiry date | Dec 12, 2003 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H35/10
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Apparatus for protection against damage from excessive torque loads, including a fast-acting slip clutch to limit torque transmitted between a drive motor and a mechanical load, and an automatic device to protect the slip clutch from damage due to slippage in excess of a predetermined amount for a predetermined time. A slip measurement device detects the degree of slippage in the clutch, and a timing circuit coupled to the slip measurement device disconnects power from the drive motor after the predetermined time has elapsed. In the illustrative embodiment of the invention, the slip clutch includes an input shaft, a wrapped spring in interference-fit engagement with the input shaft, and an output shaft in engagement with one end of the spring. The spring tends to unwrap from the input shaft and to slip if a torque in excess of a threshold level is transmitted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.