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US 8,409,140 B2Granted
Injection apparatus
AssigneeMedtronic MiniMed, Inc.
InventorsHenning Munk Ejlersen, Søren Aasmul
Life of this patent
Estimating the term…
Abstract
An injection apparatus for making an injection at a predetermined depth in skin comprises: a first skin positioning member, a second skin positioning member, wherein the first and second skin positioning members lie or are moveable to lie in an injection arrangement; an injection needle; and an injection needle movement guide to guide the injection needle for movement from a parking position above the skin, through the lower surface of the second skin positioning member to slide beneath the first skin positioning member to an injection position. A further injection apparatus comprises: an injection needle; a plunger within the injection needle; and a retractor to retract the injection needle such that material to be injected is expelled from the injection needle by the plunger.
Claims20
An injection apparatus for making an injection at a predetermined depth in skin comprising:
- a first skin positioning member having a lower surface for positioning on a first patch of skin to hold the first patch of skin in a defined position;
- a second skin positioning member having a lower surface for positioning on a second patch of skin to hold the second patch of skin in a defined position, wherein the first and second skin positioning members lie or are moveable to lie in an injection arrangement;
- an injection needle having a discharge opening;
- an injection needle movement guide to guide the injection needle for movement from a parking position above the skin, through the lower surface of the second skin positioning member to enter the second patch of skin and to slide beneath the first skin positioning member to an injection position in which the discharge opening of the needle lies at a predetermined distance below the lower surface of the first skin positioning member;
- a plunger within the injection needle;
- and
- a retractor to retract the injection needle such that material to be injected is expelled from the discharge opening of the injection needle by the plunger.
4 more elements
An injection apparatus for making an injection at a predetermined depth in skin comprising:
- a first skin positioning member having a lower surface for positioning on a first patch of skin to hold the first patch of skin in a defined position;
- a second skin positioning member having a lower surface for positioning on a second patch of skin to hold the second patch of skin in a defined position, wherein the first and second skin positioning members lie or are moveable to lie in an injection arrangement;
- an injection needle having a discharge opening;
- an injection needle movement guide to guide the injection needle for movement from a parking position above the skin, through the lower surface of the second skin positioning member to enter the second patch of skin and to slide beneath the first skin positioning member to an injection position in which the discharge opening of the needle lies at a predetermined distance below the lower surface of the first skin positioning member;
- wherein the injection needle is guided for movement using a cam follower mounted to the injection needle engaging in a cam groove in a cam plate mounted for sliding movement with respect to the injection needle,
- wherein the cam plate is initially locked against sliding movement and is released on relative movement of the first and second skin positioning members to the injection arrangement.
3 more elements
An injection apparatus for making an injection at a predetermined depth in skin comprising:
- a first skin positioning member having a lower surface for positioning on a first patch of skin to hold the first patch of skin in a defined position;
- a second skin positioning member having a lower surface for positioning on a second patch of skin to hold the second patch of skin in a defined position, wherein the first and second skin positioning members lie or are moveable to lie in an injection arrangement;
- an injection needle having a discharge opening;
- an injection needle movement guide to guide the injection needle for movement from a parking position above the skin through the lower surface of the second skin positioning member to enter the second patch of skin and to slide beneath the first skin positioning member to an injection position in which the discharge opening of the needle lies at a predetermined distance below the lower surface of the first skin positioning member;
- further comprising a plunger,
- wherein the plunger is guided for movement using a cam follower mounted to the plunger engaging in a cam groove in a cam plate mounted for sliding movement with respect to the plunger,
- wherein the cam plate is initially locked against sliding movement and is released on relative movement of the first and second skin positioning members to the injection arrangement.
4 more elements
An injection apparatus for making an injection at a predetermined depth in skin comprising:
- a first skin positioning member having a lower surface for positioning on a first patch of skin to hold the first patch of skin in a defined position;
- a second skin positioning member having a lower surface for positioning on a second patch of skin to hold the second patch of skin in a defined position, wherein the first and second skin positioning members lie or are moveable to lie in an injection arrangement;
- an injection needle having a discharge opening;
- an injection needle movement guide to guide the injection needle for movement from a parking position above the skin, through the lower surface of the second skin positioning member to enter the second patch of skin and to slide beneath the first skin positioning member to an injection position in which the discharge opening of the needle lies at a predetermined distance below the lower surface of the first skin positioning member,
- wherein the injection needle comprises a point having a tip at a distal end thereof and a shaft portion immediately proximal to said point, the shaft portion having a longitudinal axis, the tip of the injection needle being closer to the longitudinal axis of the shaft portion than is the outside of the shaft portion.
2 more elements
An injection apparatus for making an injection at a predetermined depth in skin comprising:
- a first skin positioning member having a lower surface for positioning on a first patch of skin to hold the first patch of skin in a defined position;
- a second skin positioning member having a lower surface for positioning on a second patch of skin to hold the second patch of skin in a defined position, wherein the first and second skin positioning members lie or are moveable to lie in an injection arrangement;
- an injection needle having a discharge opening;
- and
- an injection needle movement guide to guide the injection needle for movement from a parking position above the skin, through the lower surface of the second skin positioning member to enter the second patch of skin and to slide beneath the first skin positioning member to an injection position in which the discharge opening of the needle lies at a predetermined distance below the lower surface of the first skin positioning member,
- wherein the injection needle comprises a tip, at least one bevel and a heel together forming a point at a distal end thereof, and a shaft portion immediately proximal of said heel having a longitudinal axis, including a lumen extending along the longitudinal axis, wherein the at least one bevel is formed between said tip and said heel such that a lumen opening is defined from the tip to a proximal end of the lumen opening located distal of the heel, and wherein the length of the lumen opening of the needle is in a range from 5 to 15 times the diameter of the shaft of the needle.
3 more elements
Dependencies are inferred from the claim text.