Orthopedic simulator with integral load actuators
First Claim
Patent Images
1. An integral load actuator comprising:
- a housing;
a piston axially slideable within the housing;
hydrostatic bearings that float the piston; and
hydraulic fluid ports in the piston housing, with hydraulic fluid pressure in the hydraulic fluid ports controlling substantially frictionless extension and retraction of the piston with respect to the housing.
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Accused Products
Abstract
An orthopedic simulator is provided with a plurality of test stations for each holding a test specimen. A plurality of load actuators are provided, with a respective load actuator for each of the test stations. The load actuators are substantially frictionless and configured to apply loads to the test specimens at the test stations.
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Citations
18 Claims
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1. An integral load actuator comprising:
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a housing; a piston axially slideable within the housing; hydrostatic bearings that float the piston; and hydraulic fluid ports in the piston housing, with hydraulic fluid pressure in the hydraulic fluid ports controlling substantially frictionless extension and retraction of the piston with respect to the housing. - View Dependent Claims (2, 3, 4, 5)
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6. An orthopedic simulator, comprising:
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a plurality of test stations for each holding a test specimen; and a plurality of load actuators, with a respective load actuator for each of the test stations, the load actuators being substantially frictionless and configured to apply loads to the test specimens at the test stations. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14)
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15. A spinal implant wear test machine, comprising:
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a plurality of test stations configured to hold test specimens in position for application of vertical load forces on the test specimens; and a plurality of vertical load actuators positioned relative to the test stations to apply the vertical load forces to the test specimens, each load actuator having a piston that is movable with extremely low linear friction to apply the vertical load forces. - View Dependent Claims (16, 17, 18)
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Specification