Dust excluding device
US4376543A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 29, 1981 |
| Grant date | Mar 15, 1983 |
| Priority date | — |
| Expiry date | May 29, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/34769
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A dust excluding device for a linear scale type measuring instrument which comprises; flexible shield members disposed at opposite sides of an opening formed in a hollow casing along a line of movement of a movable member and having the forward ends thereof being brought into abutting contact with each other; and a neck adapted to locally push open the abutting contact portions of the shield members, for imparting a displacement of the movable member at the outside of said hollow casing to the interior of said hollow casing through said opening; characterized in that the end portions of said neck in the moving directions thereof are each formed into a letter `V` shape, the tip of which obliquely recedes from inside to outside of said hollow casing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.