Patent EP0338806A2 successfully refreshed from Google Patents.
EP0338806A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Syringes
Assignee: Owen Mumford Ltd
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Filing: 1989-04-18
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Granted: —
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Expires: 2009-04-18
Abstract
Abstract A generally pen-like syringe incorporates a dose metering device provided by a cap (7) rotatable with respect to a pen body (8) to a position related to the dose of medicament (for example insulin) to be injected. The rotation compresses a coil spring (6), which is prevented from unwinding by co-operating ratchet teeth. When the dose is to be injected, a trigger slide (42) is moved to the left causing the ratchet teeth to come out of engagement. This permits the spring (6) to unwind, thereby rotating a drive sleeve (1), drive gear (3) and a drive plunger (2). The drive plunger (2) is formed with a quick pitch screw thread so that its rotational movement is accompanied by axial movement to cause medicament to be discharged from a cartridge and injected through a needle.
Inventors
- 👤 Rury Reginald Holman
- 👤 Jeremy Michael John Marshall
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 09:38
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/178; A61M5/20; A61M5/31; A61M5/315; A61M5/31533; A61M5/31545; A61M5/31548; A61M5/3155; A61M5/31553; A61M5/31565; A61M5/31576; A61M5/31583; A61M5/24; A61M5/31535; A61M5/31543
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
50 words
A syringe comprising a body and a dose-setting device mounted on the body and capable of being moved to a selected set position, a latch arranged to retain the setting device in the set position, and means arranged to release the latch to cause the set dose to be expelled.
Claim 2
Dependent Claim
50 words
A syringe comprising a body and a dose-setting device mounted on the body and capable of being moved to a selected set position, a latch arranged to retain the setting device in the set position, and means arranged to release the latch to cause the set dose to be expelled.
Claim 3
Dependent Claim
39 words
A syringe as claimed in claim 1, wherein movement of the dose-setting device to the selected set position is accompanied by straining of a spring, which, when the latch is released, provides the force for expelling the set dose.
Claim 4
Dependent Claim
38 words
A syringe as claimed in claim 1 or 2, wherein, when the latch is released, the setting device may be returned to an original position to drive a plunger through a one-way clutch to expel the set dose.
Claim 5
Dependent Claim
24 words
A syringe as claimed in claim 1, 2 or 3, wherein the dose-setting device is a rotatable cap or ring mounted on the body.
Claim 6
Dependent Claim
34 words
A syringe as claimed in any one of claims 1 to 4, wherein a quick pitch screw thread arrangement is provided for transforming rotation of the setting device into linear movement of the plunger.
Claim 7
Dependent Claim
28 words
A syringe as claimed in claim 5, wherein means are provided for automatically releasing the quick pitch screw thread device after discharge of the contents to the syringe.
Claim 8
Dependent Claim
27 words
A syringe as claimed in any one of claims 1 to 6, wherein the body is adapted for receiving a cartridge containing a fluid to be injected.
Claim 9
Dependent Claim
78 words
A syringe as claimed in any one of claims 1 to 7, wherein the body is arranged to carry a needle, and wherein the syringe comprises a trigger, which trigger can be moved in relation to a body to conceal the needle within a depth adjuster and simultaneously to set a firing spring, and means for firing the spring to move the body so that the needle protrudes beyond the depth adjuster for penetration of a patient's skin.
Claim 10
Dependent Claim
38 words
A syringe as claimed in claim 8, wherein the operation of the trigger is arranged automatically to release the latch, whereby, once the spring has been fired and caused penetration, the dose is automatically expelled through the needle.
Claim 11
Dependent Claim
63 words
A syringe comprising a body arranged to carry a needle, and a trigger, which trigger can be moved in relation to a body to conceal the needle within a depth adjuster and simultaneously to set a firing spring, and means for firing the spring to move the body so that the needle protrudes beyond the depth adjuster for penetration of a patient's skin.
Claim 12
Dependent Claim
63 words
A syringe comprising a body arranged to carry a needle, and a trigger, which trigger can be moved in relation to a body to conceal the needle within a depth adjuster and simultaneously to set a firing spring, and means for firing the spring to move the body so that the needle protrudes beyond the depth adjuster for penetration of a patient's skin.
References Cited (Backward Citations)
No citation records indexed.
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