Sealed magnetic drive means without a passage through a wall and ultrasound probe comprising an application thereof
First Claim
1. A magnetic drive device enabling a member placed on one side of a non-magnetic wall to be driven by a rotary drive shaft placed on the other side of the wall, comprising means carrying the driven member for rocking movement thereof about an oscillation axis that is orthogonal to an axis of rotation of the drive shaft, an axially-magnetized magnet securely connected to said driven member and having an outside surface which has a cross-section in a plane containing said oscillation axis and said axis of rotation of the drive shaft that is part circular and centered on said oscillation axis, and an axially-magnetized magnet fixed to said drive shaft and offset from said axis of rotation.
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Accused Products
Abstract
The invention relates to a magnetic drive device enabling a member placed one side of a non-magnetic wall to be driven by a rotary drive shaft placed on the other side of the wall. The driven member is mounted to rock about an oscillation axis orthogonal to the axis of rotation of the drive shaft and carries an axially-magnetized magnet whose outside surface has a right cross-section in the plane containing the oscillation axis and the axis of rotation of the drive shaft that is in the form of a circle centered on the oscillation axis. The drive shaft carries an axially-magnetized magnet offset from the axis of the drive shaft.
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Citations
10 Claims
- 1. A magnetic drive device enabling a member placed on one side of a non-magnetic wall to be driven by a rotary drive shaft placed on the other side of the wall, comprising means carrying the driven member for rocking movement thereof about an oscillation axis that is orthogonal to an axis of rotation of the drive shaft, an axially-magnetized magnet securely connected to said driven member and having an outside surface which has a cross-section in a plane containing said oscillation axis and said axis of rotation of the drive shaft that is part circular and centered on said oscillation axis, and an axially-magnetized magnet fixed to said drive shaft and offset from said axis of rotation.
- 5. An ultrasound probe comprising a magnetic drive device enabling a member placed on one side of a non-magnetic wall to be driven by a rotary dive shaft placed on the other side of the wall, comprising means carrying the driven member for rocking movement thereof about an oscillation axis that is orthogonal to an axis of rotation of the drive shaft, an axially magnetized magnet securely connected to said driven member and having an outside surface which has a cross-section in the plane containing said oscillation axis and said axis of rotation of the drive shaft that is in the form of part of a circle centered on said oscillation axis, an axially-magnetized magnet fixed to said drive shaft and offset from said axis of rotation, and an ultrasound transducer carried by said driven member and placed in a space separated from the surrounding medium by said separation wall and by a window that has low ultrasound absorption.
Specification