Needle assembly for drug pump

Patent metadata

Field	Value
Publication number	US-9522234-B2
Application number	US-201414553399-A
Country	US
Kind code	B2
Filing date	Nov 25, 2014
Priority date	Jan 19, 2010
Publication date	Dec 20, 2016
Grant date	Dec 20, 2016

Abstract

An apparatus ( 110 ) includes an activation mechanism ( 20 ) and a safety latch ( 122 ). The activation mechanism is operative to deploy a needle ( 116 ) to protrude out of a housing ( 112 ), the needle ( 116 ) having a longitudinal axis. The safety latch ( 122 ) is movably mounted on the housing ( 112 ) and formed with a needle opening ( 129 ) to allow the needle ( 116 ) to pass therethrough. The safety latch ( 122 ) has a first position wherein the needle ( 116 ) is aligned to pass through the needle opening ( 129 ) and a second position wherein the safety latch ( 122 ) is moved with respect to the housing ( 112 ) such that the needle ( 116 ) is blocked from movement in a direction parallel to the longitudinal axis thereof by a portion of the safety latch ( 122 ) distanced from the needle opening ( 129 ).

First claim

I claim:

1. An apparatus for administering a substance to a subject comprising:
a housing;
a release apparatus operative to release a needle to protrude out of the housing;
a first biasing device for applying an urging force on the needle to protrude out of the housing;
a safety latch coupled to the housing and formed with a needle opening for advancement of the needle therethrough, the safety latch being movable from an initially down position to an up position when the apparatus has been placed on the subject; and
a safety latch position sensor configured to detect the position of the safety latch, and activate the release apparatus to release the needle to protrude out of the housing and pierce the subject when the safety latch has been moved to the up position, wherein
the release apparatus comprises a biasing device arrestor initially blocking the first biasing device and impeding protrusion of the needle out of the housing, and an actuator for withdrawing the biasing device arrestor, thereby releasing the first biasing device to advance the needle out of the housing.

2. The apparatus of claim 1 , wherein the actuator commences withdrawal of the biasing device arrestor when the safety latch position sensor detects that the safety latch is in the up position.

3. The apparatus of claim 1 , wherein the actuator is a step motor, a linear actuator or a solenoid.

4. The apparatus of claim 1 , further comprising a microsensor for detecting a position of the needle.

5. An apparatus for administering a substance to a subject comprising:
a housing;
a release apparatus operative to release a needle to protrude out of the housing;
a safety latch coupled to the housing and formed with a needle opening for advancement of the needle therethrough, the safety latch being movable from an initially down position to an up position when the apparatus has been placed on the subject;
a safety latch position sensor configured to detect the position of the safety latch, and activate the release apparatus to release the needle to protrude out of the housing and pierce the subject when the safety latch has been moved to the up position; and
a microsensor for detecting a position of the needle, wherein the microsensor indicates when the needle pierces the subject.

6. The apparatus according to claim 1 , wherein the safety latch is flush with the housing in the up position, and the needle is aligned with the needle opening.

7. The apparatus according to claim 1 , wherein the safety latch is pivotally mounted on said housing, and is pivoted away from the housing in the down position, and the needle is not aligned with the needle opening.

8. An apparatus for administering a substance to a subject comprising:
a housing;
a release apparatus operative to release a needle to protrude out of the housing;
a safety latch pivotally mounted to the housing and formed with a needle opening for advancement of the needle therethrough, the safety latch being movable from an initially down position, pivoted away from the housing wherein the needle is not aligned with the needle opening, to an up position when the apparatus has been placed on the subject; and
a safety latch position sensor configured to detect the position of the safety latch, and activate the release apparatus to release the needle to protrude out of the housing and pierce the subject when the safety latch has been moved to the up position,
wherein a portion of the safety latch distanced from the needle opening shields a tip of the needle in the down position.

9. The apparatus of claim 7 , further comprising a second biasing device, biasing the safety latch into the down position.

Assignees

• Medimop Medical Projects Ltd

Inventors

• Cabiri Oz

Classifications

• A61M2005/14252

  with needle insertion means · CPC title

• A61M5/3204

  Needle cap remover, i.e. devices to dislodge protection cover from needle or needle hub, e.g. deshielding devices · CPC title

• A61M5/2033 Primary

  Spring-loaded one-shot injectors with or without automatic needle insertion (multishot dosing syringes A61M5/31525, needle insertion only A61M5/3287) · CPC title

• A61M5/14248 Primary

  of the skin patch type · CPC title

• A61M5/142

  Pressure infusion, e.g. using pumps · CPC title