Subcutaneous injector
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 21, 1995
Grant Date -
N/A
app pub date -
Aug 2, 1993
filing date -
Jan 15, 1991
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A disposable, automatic, injector is disclosed which allows self-administration of a medicament to be injected subcutaneously. The injector comprises a barrel (1) with an inner chamber bounded by a liner (2). A first piston (4) and a second piston (11) are provided which may slide within the chamber with a fluid-tight seal with the liner (2). The second piston (11) carries an injection needle (13). A drive means, comprising a compression spring (5) and a releasable retaining collet (6), is provided to act on the first piston (4) to drive it towards the second piston (11). In operation, the drive means urges the first piston towards the second (11). The injection fluid, initially stored between the first and second pistons is incompressible and causes the second piston (11) to move until the needle (13) projects from the end of the barrel (1). When the needle (13) is fully extended the second piston (11) stops but the first piston (4) continues to move so causing injection fluid to be forced out through the needle (13).
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully