Injection device
First Claim
1. An injection device for injecting a host at an injection surface thereon comprising:
- a base having a forward end and a rearward end;
needle carrying means supported on said base and operable to move a needle from a first, retracted position to a second, extended position relative to said forward end of said base; and
needle actuation means, operatively coupled to said needle carrying means and responsive to the orientation of said needle carrying means and the injection surface of the host, said needle actuation means being operative to permit movement of said needle carrying means from said first position to said second position only when said needle carrying means and the injection surface of the host are in a preferred orientation relative to each other.
2 Assignments
0 Petitions
Accused Products
Abstract
An injection device particularly suitable for the intraruminal injection of ruminants is described. The injection device is characterized by a needle carrying means and a needle actuation means, which are operatively coupled such that the needle actuation means permits movement of the needle carrying means from a retracted position to an extended position, wherein the needle is capable of piercing the rumen, only when the needle carrying means is in a preferred orientation (e.g. perpendicular) to the surface of the host animal at the injection site. The injection device is further characterized by a dose delivery actuation means which is responsive to the relative position of the needle carrying means and the needle actuation means such that the dose is delivered to the host animal only when the needle carrying means and the needle actuation means are in a preferred position relative to each other. The characteristic features of the described injection device substantially prevent the application of a dose to a host animal not within an intended dose delivery area.
127 Citations
42 Claims
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1. An injection device for injecting a host at an injection surface thereon comprising:
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a base having a forward end and a rearward end; needle carrying means supported on said base and operable to move a needle from a first, retracted position to a second, extended position relative to said forward end of said base; and needle actuation means, operatively coupled to said needle carrying means and responsive to the orientation of said needle carrying means and the injection surface of the host, said needle actuation means being operative to permit movement of said needle carrying means from said first position to said second position only when said needle carrying means and the injection surface of the host are in a preferred orientation relative to each other. - View Dependent Claims (2, 3, 4, 5, 6, 7, 20, 33, 34, 35)
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8. An injection device for injecting a host at an injection surface thereon comprising:
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a base having a forward end and a rearward end; needle carrying means supported by said base and operable to move a needle from a first, retracted position to a second, extended position relative to the forward end of said base; needle actuation means operatively coupled to said needle carrying means and responsive to the orientation of said needle carrying means and the injection surface of the host, said needle actuation means being operative to permit movement of said needle carrying means from said first position to said second position only when said needle carrying means and the injection surface of the host are in a preferred orientation relative to each other; dose delivery means operatively connected to said needle carrying means; and dose delivery actuation means responsive to the relative position of said needle carrying means and said needle actuation means and operable to actuate said dose delivery means only when said needle carrying means and said needle actuation means are in a preferred position relaive to each other. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 36, 37)
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21. An injection device for injecting a host at an injection surface thereon comprising:
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a housing having a forward end and a rearward end; a plate spaced from the forward end of said housing and adapted to contact the injection surface of a host; a plurality of shafts pivotably connected to said plate and slidably received within a portion of said housing for supporting said plate on said housing; a needle piston having means thereon for supporting a needle, said needle piston being slidably received within said housing and being adapted to move a needle from a first, retracted position to be a second, extended position relative to the forward end of said housing; and a plurality of retainers mounted on said housing for retaining said needle piston in said first position, each of said plurality of retainers being operatively coupled to one of said shafts for release of said needle piston upon rearward movement of said shafts, said shafts being operative to release said retaining means only when said plate and said housing are in a preferred orientation relative to each other. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 38, 39, 40, 41, 42)
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Specification