CA2155669A1 - Improvements in pistons for injection cartridges - Google Patents

Improvements in pistons for injection cartridges

Info

Publication number
CA2155669A1
CA2155669A1 CA002155669A CA2155669A CA2155669A1 CA 2155669 A1 CA2155669 A1 CA 2155669A1 CA 002155669 A CA002155669 A CA 002155669A CA 2155669 A CA2155669 A CA 2155669A CA 2155669 A1 CA2155669 A1 CA 2155669A1
Authority
CA
Canada
Prior art keywords
pistons
cartridge
piston
injection cartridges
injection
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002155669A
Other languages
French (fr)
Other versions
CA2155669C (en
Inventor
Birger Hjertman
Olle Ljungquist
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pfizer Health AB
Original Assignee
Birger Hjertman
Olle Ljungquist
Kabi Pharmacia Ab
Pharmacia Ab
Pharmacia & Upjohn Aktiebolag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from SE9300525A external-priority patent/SE9300525D0/en
Application filed by Birger Hjertman, Olle Ljungquist, Kabi Pharmacia Ab, Pharmacia Ab, Pharmacia & Upjohn Aktiebolag filed Critical Birger Hjertman
Publication of CA2155669A1 publication Critical patent/CA2155669A1/en
Application granted granted Critical
Publication of CA2155669C publication Critical patent/CA2155669C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

A piston (11) to be used in displacing a liquid inside a cylindrical chamber, preferably in an injection cartridge of the dual-chamber type, has at least one of its end surfaces (12) shaped convex such that said end surface or surfaces (12) are essentially planar when the piston has been arranged inside the barrel of said cartridge. Preferably both pistons in the cartridge have such a shape, their planar surfaces facing each other.
CA002155669A 1993-02-17 1994-02-14 Improvements in pistons for injection cartridges Expired - Lifetime CA2155669C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9300525-4 1993-02-17
SE9300525A SE9300525D0 (en) 1993-02-17 1993-02-17 PISTON
PCT/SE1994/000117 WO1994019035A1 (en) 1993-02-17 1994-02-14 Improvements in pistons for injection cartridges

Publications (2)

Publication Number Publication Date
CA2155669A1 true CA2155669A1 (en) 1994-09-01
CA2155669C CA2155669C (en) 2005-10-04

Family

ID=35355455

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002155669A Expired - Lifetime CA2155669C (en) 1993-02-17 1994-02-14 Improvements in pistons for injection cartridges

Country Status (1)

Country Link
CA (1) CA2155669C (en)

Also Published As

Publication number Publication date
CA2155669C (en) 2005-10-04

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Legal Events

Date Code Title Description
EEER Examination request
MKEX Expiry

Effective date: 20140214