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US 2008/0166248 A1Published application
Coupling system for use with fluid displacement apparatus
AssigneeIvek Corporation
InventorsDouglas S. Bensley, Robert C. Demers, James V. Bruno
Life of this patent
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Abstract
A magnetic coupling system may be used in a fluid displacement apparatus to magnetically couple a drive shaft to a piston. The magnetic coupling system may include first and second magnetic couplers at the ends of the drive shaft and piston, respectively. The second magnetic coupler is configured to magnetically engage the first magnetic coupler and configured to mechanically engage the first magnetic coupler if the couplers disengage magnetically.
Claims20
A fluid displacement apparatus comprising:
- a linear actuator;
- a drive shaft coupled to the linear actuator, the drive shaft including a first magnetic coupler at one end of the drive shaft;
- a piston magnetically coupled to the drive shaft of the linear actuator, the piston including a second magnetic coupler at one end of the piston, the second magnetic coupler configured to magnetically engage the first magnetic coupler and configured to mechanically engage the first magnetic coupler if the couplers disengage magnetically;
- and
- a cylinder defining a displacement chamber for receiving the piston.
2 more elements
A magnetic coupling system comprising:
- a first magnetic coupler including at least a first magnetic portion and tangs extending axially relative to the first magnetic coupler and radially inwardly toward a longitudinal axis of the first magnetic coupler, the tangs defining a coupling region;
- and
- a second magnetic coupler configured to engage the first magnetic coupler, the second magnetic coupler including at least a second magnetic portion and at least one radial portion extending radially outwardly from the second magnetic portion, the radial portion being configured to be received in the coupling region of the first magnetic portion such that the first magnetic portion is configured to magnetically engage the second magnetic portion and the tangs are configured to mechanically engage the radial portion if the magnetic portions disengage magnetically.
A linear actuator comprising:
- a lead screw;
- a threaded rotor threadably engaging the lead screw and configured to move the lead screw in a linear direction within a housing;
- and
- an anti-rotation device attached to the lead screw, the anti-rotation device including a hub and radial portions extending radially from the hub, the radial portions including ends configured to engage grooves extending longitudinally in the housing, the radial portions including slots in the ends such that the ends are configured to compress and engage the respective grooves with an interference fit.
1 more element
An apparatus comprising:
- a housing including grooves extending longitudinally along an inner portion of the housing;
- a linear actuator coupled to the housing, the linear actuator comprising:
- a lead screw;
- a threaded rotor threadably engaging the lead screw and configured to move the lead screw in a linear direction within the housing;
- and
- an anti-rotation device attached to the lead screw, the anti-rotation device including a hub and radial portions extending radially from the hub, the radial portions including ends engaging grooves extending longitudinally in the housing, the radial portions including slots in the ends such that the ends are compressed and engage the respective grooves with an interference fit.
3 more elements
Dependencies are inferred from the claim text.