Abstract: A sliding cover for a liquid delivery device, such as a cap (100) for a pen injector (200), incorporates a set of sensors including a first optical sensor (110) with an output which changes during uncapping or capping motions on passing of a plunger (220) of the pen injector. This output is used together with at least one additional sensor output to determine the position of the plunger along a cylinder (210) of the liquid delivery device. By monitoring changes in the plunger position, the quantity of dosages delivered by the liquid delivery device can be determined, displayed, stored and/or transmitted to an external device for further data processing or storage.

Abstract: A sliding cover for a liquid delivery device, such as a cap (100) for a pen injector (200), incorporates a set of sensors including an optical sensor (110) with an output which changes during uncapping or capping motions on passing of a plunger (220) of the pen injector. This output is used together with a position sensor (120) to determine the position of the plunger along a cylinder (210) of the liquid delivery device. By monitoring changes in the plunger position, the quantity of dosages delivered by the liquid delivery device can be determined, displayed, stored and/or transmitted to an external device for further data processing or storage. Preferred implementations of the invention employ optical sensors with a converging beam (115), and/or position sensors employing linear potentiometer strips (132).

Abstract: A liquid delivery system cap device is provided. In some embodiments, an example cap device includes a body defining a cavity configured to receive at least a portion of a liquid delivery device, a first sensor configured to output a first sensor signal indicative of a plunger of the liquid delivery device, and a processor configured to detect a plunger of the liquid delivery device based on a variation in the sensor signal of the first sensor.

Abstract: A liquid delivery system cap device is provided. In some embodiments, an example cap device includes a body defining a cavity configured to receive at least a portion of a liquid delivery device, and a sensor carriage movable within the cavity and including a first sensor. The sensor carriage may be movable between a first position and a second position relative to the cavity while the liquid delivery device is in a fixed positon relative to the cavity.

Abstract: A sliding cover for a liquid delivery device, such as a cap (100) for a pen injector (200), incorporates a set of sensors including an optical sensor (110) with an output which changes during uncapping or capping motions on passing of a plunger (220) of the pen injector. This output is used together with a position sensor (120) to determine the position of the plunger along a cylinder (210) of the liquid delivery device. By monitoring changes in the plunger position, the quantity of dosages delivered by the liquid delivery device can be determined, displayed, stored and/or transmitted to an external device for further data processing or storage. Preferred implementations of the invention employ optical sensors with a converging beam (115), and/or position sensors employing linear potentiometer strips (132).

Abstract: A sliding cover for a liquid delivery device, such as a cap (100) for a pen injector (200), incorporates a set of sensors including a first optical sensor (110) with an output which changes during uncapping or capping motions on passing of a plunger (220) of the pen injector. This output is used together with at least one additional sensor output to determine the position of the plunger along a cylinder (210) of the liquid delivery device. By monitoring changes in the plunger position, the quantity of dosages delivered by the liquid delivery device can be determined, displayed, stored and/or transmitted to an external device for further data processing or storage.

Abstract: A replaceable cap (10) for a transdermal liquid dosing device) such as an insulin pen is provided. The cap includes an elongate hollow body (14) with a first open end (16) which can be placed over a front part (26) of the dosing device and a second closed end (18) opposite the first end. The cap body also includes a cavity which opens into the interior (50) of the cap body and which houses a control unit (52) which includes a timer unit, a switch mechanism (56) that stands at least partially proud of the cavity so as to project into the interior of the body, and a timer display unit (58) which displays time counted by the timer unit on an outer surface of the body of the cap.