# US 2019/0167894 A1 · Automatic injector having door block until proper cartridge insertion

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- Number: US 2019/0167894 A1
- Document ID: US20190167894A1
- Status: Published application
- Kind: A1
- Application number: 16/321,185
- Filed: 2016-12-21
- Published: 2019-06-06
- Earliest claimed: 2016-08-01
- Assignees: West Pharma. Services IL, Ltd.
- Applicants: West Pharma. Services IL, Ltd.
- Inventors: Lior BARCHEN; Yossi BAR-EL
- Web page: https://patentgrep.com/patent/US20190167894A1

## CPC

- A61M 5/14248: {of the skin patch type}
- A61M 5/1456: {with a replaceable reservoir comprising a piston rod to be moved into the reservoir, e.g. the piston rod is part of the removable reservoir}
- A61M 5/1452: {pressurised by means of pistons}
- A61M 2005/14268: {with a reusable and a disposable component}
- A61M 2005/14573: {with a replaceable reservoir for quick connection/disconnection with a driving system}
- A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)}

## Abstract

An automatic injector device for delivering a pharmaceutical substance from a cartridge having a protruding edge, positioned in a housing cartridge bay having an opening sized to allow passage of the cartridge; a door to the cartridge bay opening, the door connected to the housing and having an unlatched position and a latched position, the door defining a trajectory between the unlatched position and the latched position; an interference element having a deflected and an inflected orientation, the deflected orientation mechanically interferes with the trajectory of the door; and a contact interface positioned along the cartridge bay and extending up to the protruding edge, the contact interface mechanically couples the deflected and inflected orientation with a sensed contact of the protruding edge, such that when the protruding edge is positioned at the contact interface, the contact interface shifts the interference element into the inflected orientation.

## Claims

### Claim 1

An automatic injector device for delivering a pharmaceutical substance from a cartridge having a protruding edge, said cartridge positioned in a housing of said device, said housing comprising:
a cartridge bay having an opening sized to allow passage of said cartridge into said cartridge bay;
a door to said cartridge bay opening, said door connected to said housing and having an unlatched position and a latched position, said door defining a trajectory between the unlatched position and the latched position;
an interference element having a deflected and an inflected orientation, said deflected orientation mechanically interferes with said trajectory of said door; and
a contact interface positioned along said cartridge bay and extending up to said protruding edge, said contact interface mechanically couples said deflected and inflected orientation with a sensed contact of said protruding edge, such that when said protruding edge is positioned at said contact interface, said contact interface shifts said interference element into said inflected orientation.

### Claim 2 (depends on 1)

The device of claim 1, wherein said door further comprises a coupling link, positioned to mechanically link said cartridge with a motor, when said door is in the latched position.

### Claim 3 (depends on 2)

The device of claim 2, wherein said coupling link comprises a gear having cogs complementary to a powering gear of said motor and a driving gear of said cartridge.

### Claim 4 (depends on 3)

The device of claim 3, wherein said driving gear is mechanically coupled to a plunger residing within said cartridge.

### Claim 5 (depends on 1)

The device of claim 1, wherein said contact interface is positioned at a rim of said opening of said cartridge bay.

### Claim 6 (depends on 1)

The device of claim 1, wherein said contact interface is elastic.

### Claim 7 (depends on 6)

The device of claim 6, wherein said deflected orientation comprises an unstressed configuration of said interference element and said inflected orientation comprises a stressed configuration of said interference element.

### Claim 8 (depends on 6)

The device of claim 6, wherein said contact interface mechanically interferes with a location of said protruding edge of said cartridge residing beyond said rim and outside of said cartridge bay.

### Claim 9 (depends on 8)

The device of claim 8, wherein said location comprises a range of about 0.5 mm to about 3 mm beyond said rim and outside of said cartridge bay.

### Claim 10 (depends on 1)

The device of claim 1, further comprising a cartridge lock positioned at said rim.

### Claim 11 (depends on 10)

The device of claim 10, wherein said cartridge lock comprises a snap mechanism shaped to snap over a proximal edge of said cartridge and mechanically press against said cartridge, when said cartridge is positioned in said cartridge bay and said protruding edge contacts said contacts interface.

### Claim 12 (depends on 1)

The device of claim 1, wherein a transition from said unlatched position to said latched position of said door is irrevocable.

### Claim 13 (depends on 12)

The device of claim 12, wherein said door is pivotable about a first axis parallel to said cartridge bay and wherein said door is rotatable about a second axis which is perpendicular to the first axis.

### Claim 14

A method for amplifying a position of a cartridge having a protruding edge in a housing of an automatic injector, said housing having a door for closing the cartridge inserted into a cartridge bay of said housing, comprising:
mechanically interfering with a trajectory of closing said door through a deflected interference element;
inserting said cartridge into said cartridge bay of said housing;
pressing said protruding edge of said cartridge against a contact interface positioned along said cartridge bay, said contact interface mechanically coupled to said deflected interference element;
shifting the position of said contact interface, thereby inflecting said interference element away from said trajectory of said door; and
latching said door in a closed position.

### Claim 15 (depends on 14)

The method of claim 14, wherein said latching said door in said closed position further comprises positioning a coupling link between a driving system of said cartridge and a motor of said injector.

### Claim 16 (depends on 14)

The method of claim 14, wherein said inserting said cartridge further comprises inserting at least 95% of said cartridge before said protruding edge of said cartridge is pressed against said contact interface.

### Claim 17 (depends on 16)

The method of claim 16, further comprising pushing said cartridge away from said cartridge bay when less than 95% of said cartridge is inserted.

### Claim 18 (depends on 17)

The method of claim 17, wherein said pushing comprises preventing a proximal edge of said cartridge from residing in a range of about 0.5 mm to about 3 mm outside of said cartridge bay.

### Claim 19 (depends on 14)

The method of claim 14, further comprising locking a position of said cartridge following said pressing of said protruding edge against said contact interface.

### Claim 20 (depends on 19)

The method of claim 19, wherein said locking a position of said cartridge comprises locking said pressing of said protruding edge against said contact interface and locking said interference element in an inflected orientation.