Vacuum chuck spinstand for testing magnetic heads and disks
US7295002B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 17, 2006 |
| Grant date | Nov 13, 2007 |
| Priority date | — |
| Expiry date | Jan 25, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/001
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A spinstand having a vacuum chuck clamping mechanism for securing magnetic discs includes a cap (9) and a base (10). A disk-to-be-clamped is held between the cap (9) and the base (10). Vacuum, applied through a port (4) in a mounting screw (12) of the base, provides the clamping force. The vacuum is held constant using a circumferential seal (27) on a piston (2) of the cap, which extends into a cylindrical countering bushing (3) extending from the base. In one form, the cap (9) is centered about a spin axis (SA) extending through the base (10), using a hardened pin (1) extending from the cap and a locating bushing (19) affixed to the base. When the cap (9) is inserted into the base (10), the pin (1) prevents a piston (2) in the cap from contacting the inside walls/sealing surface (11) of the centering bushing (3) of the base. To remove the cap, positive air pressure is applied to the air passage (4), collapsing the seal (27), and forcing the cap (9) out of the base (10) without causing wear on the seal (27) or the sealing surface (11) of the centering bushing (3).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.