Rotary motor based transdermal injection device
Inventors
Dyer, Robert J. • Tappan, Carl • VanWyk, Eric
Assignees
Interested in licensing this patent?
MTEC can help explore whether this patent might be available for licensing for your application.
Publication Number
US-12343506-B2
Publication Date
2025-07-01
Expiration Date
Abstract
An apparatus for injectate delivery includes a cartridge, a linear actuator, a rotary motor mechanically coupled the actuator, and a controller coupled to the motor. The controller controls a linear motion of the actuator by controlling an electrical input supplied to the motor in a first interval during which the motor is stationary with the linear actuator engaged with the cartridge to displace an injectate in the cartridge, a second interval following the first interval during which the controller accelerates the motor from stationary to a first speed selected to create a jet of the injectate from the cartridge with a velocity sufficient to pierce human tissue to a subcutaneous depth, a third interval during which the controller maintains the motor at or above the first speed, and a fourth interval during which the controller decelerates the motor to a second speed to deliver the injectate at the subcutaneous depth.
Core Innovation
The invention is an apparatus for injectate delivery that uses a cartridge containing a volume of an injectate and an exit port, together with a linear actuator configured for delivery from the exit port. The linear actuator includes a linkage, and a rotary motor is mechanically coupled to the linkage so that motion of the rotary motor drives linear motion of the linear actuator. A controller is coupled to the rotary motor and controls an electrical input supplied to the rotary motor to control linear motion in response to a control signal.
The controller control sequence is defined in three intervals: a first interval during which the rotary motor is engaged with the cartridge to displace the injectate therefrom, a second interval during which the controller drives the rotary motor to maintain a jet of the injectate at or above a first speed selected to create a channel through a human tissue to a subcutaneous depth, and a third interval during which the controller drives the rotary motor at a second speed less than the first speed and maintained within a range selected to deliver the volume of the injectate at the subcutaneous depth. The speed and velocity profile supports piercing and channel formation followed by delivery of the injectate volume at the target depth.
The apparatus further includes a sensor system configured to detect when the apparatus is properly positioned to deliver the injectate in an injection to a patient. When the apparatus is properly positioned, the controller is configured to create a human-perceptible signal by the apparatus. The described implementation also includes a battery plus DC/DC and supercapacitors to support high peak power for rapid acceleration and deceleration of the rotary motor across the defined intervals.
Claims Coverage
The independent claim defines the overall apparatus architecture and a three-interval rotary-motor control scheme, including proper-position sensing and creation of a human-perceptible signal. Dependent refinements in the provided claim list further add timing constraints, interval duration ranges, speed ordering, specific positioning sensing by cartridge angle, and constraints on injectate viscosity and temperature.
Three-interval rotary-motor control for channel creation and volume delivery
A controller coupled to the rotary motor controls linear motion of the linear actuator in response to a control signal by controlling an electrical input supplied to the rotary motor in (i) a first interval engaged with the cartridge to displace the injectate therefrom, (ii) a second interval driving the rotary motor to maintain a jet of the injectate at or above a first speed selected to create a channel through human tissue to a subcutaneous depth, and (iii) a third interval driving the rotary motor at a second speed less than the first speed and maintained within a range selected to deliver the volume of the injectate at the subcutaneous depth.
Cartridge and linkage-driven linear actuator with rotary motor coupling
A cartridge containing a volume of an injectate and an exit port; a linear actuator configured for delivery of the injectate from the exit port of the cartridge, the linear actuator including a linkage; and a rotary motor mechanically coupled to the linkage.
Proper-position detection with human-perceptible signaling
A sensor system configured to detect when the apparatus is properly positioned to deliver the injectate in an injection to a patient, wherein the controller is configured to create a human-perceptible signal by the apparatus when the apparatus is properly positioned to deliver the injectate.
Minimum injection cycle time limitation
The controller prevents multiple injectate delivery operations occurring within a predetermined minimum injection cycle time.
Interval duration ranges for channel-creation and delivery
The second interval lasts between 30 and 100 milliseconds and the third interval lasts between 100 and 1000 milliseconds.
Speed ordering enabling piercing and delivery via interval-controlled profile
A first and second speed lower than a third speed such that, using an interval-controlled profile, a jet of the injectate from a cartridge has sufficient velocity to pierce human tissue.
Cartridge angle detection for proper positioning
A sensor system detects the angle of the cartridge relative to the patient’s skin.
Injectate viscosity and temperature constraints
The injectate has a specified viscosity and is used at a specified temperature range.
Overall claim coverage centers on a cartridge-and-linkage linear actuator driven by a rotary motor under controller control with three distinct intervals: displacing injectate, maintaining jet speed for channel creation to a subcutaneous depth, and delivering the injectate volume at that depth using a lower, range-limited speed. The coverage also includes sensor-based proper-position detection with human-perceptible signaling, and multiple dependent refinements specifying timing limits, interval durations, speed relationships, positioning by cartridge angle, and constraints on injectate viscosity and temperature.
Stated Advantages
Documented Applications
No documented applications found
Interested in licensing this patent?