Patent ID: 9649434
Date: 2017-05-16
CPC Classifications: A61M

Claim:
1. A device for dispensing fluid to a patient comprising: a first reservoir configured to provide a source of fluid under pressure; a bolus flow path for the delivery of a bolus dose of fluid; a large volume bolus delivery system in fluid communication with the bolus flow path and configured to receive a pre-determined volume of fluid from the first reservoir, the bolus delivery system being configured to elastically expand to pressurize the pre-determined volume of fluid, store the pressurized pre-determined volume of fluid and dispense the pressurized pre-determined volume of fluid while avoiding bolus refill during bolus delivery or after bolus delivery but before it is enabled to elastically expand in a subsequent delivery cycle; and a patient operable actuator actuated by pressing from an extended position to a depressed locked position to release fluid from the bolus delivery system, the actuator being configured such that once held in the depressed locked position, it does not require further effort to force the fluid out of the bolus reservoir by the patient, wherein the fluid is automatically forced out of the bolus reservoir to the patient while the actuator is in the depressed locked position; and a lock configured with the patient operable actuator in a manner so as to automatically move to a locked position upon automatic subsequent release of the patient operable actuator from the depressed locked position to the extended position upon emptying the bolus reservoir and to automatically disengage from the locked position when the bolus reservoir is refilled so that the patient operable actuator is actuated only when the bolus delivery system contains the predetermined volume of fluid.