ARTICULATED ACTUATOR FOR IMPLANTABLE PUMP
First Claim
8. An actuator for delivering fluid through a piston channel from an inlet to an outlet during a pumping stroke, the actuator comprising:
- a piston with an engagement surface, the piston sized and shaped for placement in a piston channel;
an armature with a contact surface, whereby the armature drives the piston through the piston channel during the pumping stroke by the contact surface contacting the engagement surface.
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Accused Products
Abstract
The present invention is an actuator for a piston pump that includes a separately formed piston and armature. The piston and the armature are later assembled together or are inserted into the piston pump in such a manner as to cooperate during pumping. Assembling the piston and the armature as separate components may provide for improved form of the piston component when manufactured separately from the armature, due to, for example, increased simplification of the manufacturing process. In addition, effects of manufacturing the piston and the armature together, such as stress on the piston, may be reduced.
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Citations
23 Claims
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8. An actuator for delivering fluid through a piston channel from an inlet to an outlet during a pumping stroke, the actuator comprising:
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a piston with an engagement surface, the piston sized and shaped for placement in a piston channel; an armature with a contact surface, whereby the armature drives the piston through the piston channel during the pumping stroke by the contact surface contacting the engagement surface. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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17. An apparatus for delivering a fluid, the apparatus comprising:
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a housing; an inlet in the housing for receiving the fluid; an outlet in the housing for discharging the fluid; a piston channel within the housing through which the fluid flows from the inlet to the outlet; and an actuator assembly positioned within the housing and moveable between a first position and a second position, the actuator assembly driving the fluid stored in a piston chamber toward the outlet when the actuator assembly transitions from a retracted position to a forward position, the actuator assembly comprising; an armature with a contact surface; and a piston moveable within the piston channel, the piston including an engagement surface that operably interacts with the contact surface of the armature. - View Dependent Claims (1, 2, 3, 4, 5, 6, 7, 18, 19, 20, 21, 22, 23)
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21-1. The apparatus of claim 20 wherein the contact nub is one or more of the shape of a ball or cone.
Specification