Mechanism for feedthrough of rotary motion to a sealed chamber
US5243867A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 26, 1991 |
| Grant date | Sep 14, 1993 |
| Priority date | — |
| Expiry date | Sep 26, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/2111
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A mechanism for feedthrough of rotary motion to a sealed chamber includes a shaft (220) rotatingly supported inside a hollow housing (200). The shaft (220) comprises a front portion (222), a middle portion (224), and a rear portion (226). The front portion (222) of the shaft protrudes into a sealed external vacuum chamber (202), which is attached to the housing (200). The rear portion (226) of the shaft (220) is eccentric with respect to the rotational axis of the shaft. A cylindrical end (244) of the shaft rotatingly supports a cap (252), which is coaxial with the shaft end (244). The housing (200) and the cap (252) are sealingly and movably connected by a bellows (246). A compensator (250), eccentric with respect to the cap (252) is rotatingly mounted at the periphery of the cap and is fitted into a cavity within an eccentric driver (248), the rotational axis of which is concentric with that of the shaft ( 220). The compensator (250) is rotatingly mounted inside a cylindrical cover (282), which is rigidly attached to the housing (200). Rotation of the driver (248) imparts planetary motion to the compensator (250), the cap (252), and the shaft end (244), which orbit the rotational…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.