Limit stop
US4064981A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 24, 1975 |
| Grant date | Dec 27, 1977 |
| Priority date | — |
| Expiry date | Feb 24, 1995 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H25/2015
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Limit stop apparatus wherein a driven shaft rotates a predetermined number of revolutions in either direction whereupon a travelling nut assembly contacts a shock absorbing stop to terminate shaft rotation by frictionally jamming screw threads between the nut assembly and the driven shaft. Outer and inner portions of the nut assembly are connected for limited relative rotational motion on non-jamming auxiliary threads, thus permitting the driven shaft to be backed off to release the nut assembly from the shock absorbing stop and thereby release the jammed threads with a minimum of available torque. By this structure, locking of the limit stop at either end is prevented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.