Carriage coupling device system for pen plotter
US4879567A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 19, 1987 |
| Grant date | Nov 7, 1989 |
| Priority date | — |
| Expiry date | Aug 19, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D15/16
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A low-friction, low-play bearing system for use in a carriage coupling drive system for a pen plotter including a moving carriage slidably mounted on a shaft between the ends of and carrying a U-shaped pen-carrying yoke in combination therewith for sliding motion along the shaft and rotary motion about the shaft. A pair of annular ball-bearing thrust bearings are disposed over the shaft between respective ends of the U-shaped yoke and the moving carriage. An annular bias spring such as a wave spring is disposed over the shaft between the moving carriage and one of the thrust bearings to create a longitudinal expansion force resisting play between the moving carriage and the U-shaped yoke.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.