Knob and shaft assembly
US4790208A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 4, 1988 |
| Grant date | Dec 13, 1988 |
| Priority date | — |
| Expiry date | Mar 4, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T403/5746
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A knob and shaft assembly for operating, for example, a vehicle air brake control valve includes a knob member having a front face and a barrel projecting the face, and a shaft member which is threadedly engaged with the threads carried on the circumferentially extending wall defining cavity within the barrel. The assembly is provided with locking detents comprising protrusions on the shaft which are received within apertures on the barrel to releasably lock the knob member to the shaft member, thereby preventing the members from being accidentally becoming disengaged, and also assuring the proper orientation of the knob with respect to the shaft to permit indicia embossed on the knob member to be easily read by the operator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.