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ARTIFICIAL INSEMINATION APPARATUS

  • US 3,877,430 A
  • Filed: 07/17/1974
  • Issued: 04/15/1975
  • Est. Priority Date: 07/17/1974
  • Status: Expired due to Term
First Claim
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1. A straw assembly for the artificial insemination of animals, said straw assembly comprising the combination of:

  • a straw consisting of a tubular member of polymeric synthetic resinoUs material, said polymeric synthetic resinous material being heat sealable, said straw filled with semen-containing fluid, said straw heat sealed at one end to provide a heat sealed closure, said heat sealed closure being sealed to withstand internal liquid pressure applied thereto by the liquid within the straw of 50 pounds per square inch, said polymeric synthetic resinous material being relatively rigid, said walls being of sufficient thickness and said polymeric synthetic resinous material of sufficient rigidity so that said straw withstands an internal liquid pressure of 50 psi without leakage, a piston member received in said straw, said piston member disposed toward the opposite end of the straw from said heat sealed closure, said piston member being substantially spherical when not received in said straw, said piston member being of polymeric elastomeric material, said piston member being relatively resilient with respect to the rigidity of said walls of said straw, said piston member deformed as received in said straw into a substantially cylindrical member having convexedly extending ends, said piston member disposed to exert at least 50 pounds per square inch pressure on the contents of said straw when urged inwardly into said straw with a pusher member, without leakage of said contents past said piston member.

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