Injector
First Claim
1. An injector comprising, an elongated hollow body, an interacting piston and cylinder mounted within the body and co-operating to provide a variable volume chamber with said piston or cylinder fixed to said body, a first passage extending from said chamber to one end of said body to communicate with an injection needle fixed to the body, a second passage extending from said chamber toward the other end of said body and to be connected to a reservoir of liquid to be delivered by said injector, valve means restricting said liquid to move through said injector from second passage to said first passage, spring means biasing said piston and cylinder to move relative to each other to minimise the volume of said chamber, retaining means to selectively prevent relative movement of said piston and cylinder to minimise said volume, and trigger release means movably mounted at said one end of said body and operatively associated with said retaining means to operate same upon movement of said trigger release means to permit relative movement between said piston and cylinder to thereby eject liquid through said first passage.
1 Assignment
0 Petitions
Accused Products
Abstract
An injector to inject liquid into an animal, said injector being of generally cylindrical configuration and having a pre-loadable piston and cylinder which when operated eject liquid through a needle of the injector, said injector having a trigger movably mounted at one end, which trigger selectively permits relative movement of the piston and cylinder to eject liquid from within the injector.
107 Citations
11 Claims
- 1. An injector comprising, an elongated hollow body, an interacting piston and cylinder mounted within the body and co-operating to provide a variable volume chamber with said piston or cylinder fixed to said body, a first passage extending from said chamber to one end of said body to communicate with an injection needle fixed to the body, a second passage extending from said chamber toward the other end of said body and to be connected to a reservoir of liquid to be delivered by said injector, valve means restricting said liquid to move through said injector from second passage to said first passage, spring means biasing said piston and cylinder to move relative to each other to minimise the volume of said chamber, retaining means to selectively prevent relative movement of said piston and cylinder to minimise said volume, and trigger release means movably mounted at said one end of said body and operatively associated with said retaining means to operate same upon movement of said trigger release means to permit relative movement between said piston and cylinder to thereby eject liquid through said first passage.
Specification