Patent ID: 9149581
Filing Date: 2015-10-06
Classification: A61M

Abstract:
1. A device for injecting a substance into a patient, the device comprising: an upper housing having an open distal end and a closed proximal end; a central housing telescopically within the upper housing at its open distal end; a lower housing telescopically coupled with the upper housing at its open distal end and the central housing to form at least one chamber for containing the substance, wherein the at least one chamber comprises: a first biasing element disposed in the lower housing, configured to store compressive force when the upper housing and the lower housing are manually compressed together and to move the upper housing and the lower housing apart from one another when the upper and lower housings are released from compression; a second biasing element disposed in the upper housing, configured to substantially resist compression of the upper and central housings until the upper and lower housings are substantially manually compressed together; a needle in fluid communication with the at least one chamber and extending into the lower housing such that, when the upper housing and the lower housing are manually compressed together, a distal end of the needle extends out of a distal end of the lower housing for injecting the substance into the patient; and a barrier for isolating the second chamber from the first chamber, wherein the barrier may be compromised under manual pressure causing the first and second substances to mix in at least one of the first and second chambers, wherein the first biasing element is configured to move the upper housing and the lower housing apart, when they are released from compression, to retract the distal end of the needle fully into the lower housing, wherein the lower housing and the upper housing are configured to telescope toward one another only by manual force; wherein the central housing and the upper housing are configured to telescope toward one another by manual force; and wherein the barrier is coupled to a sleeve by a coupling element that passes through the needle, and wherein movement of the sleeve under manual pressure dislodges the barrier.