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Dispensing pump which is lockable and sealable for transporation and storage

  • US 5,524,793 A
  • Filed: 07/21/1994
  • Issued: 06/11/1996
  • Est. Priority Date: 07/21/1994
  • Status: Expired due to Term
First Claim
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1. A pump dispenser comprising:

  • an accumulator;

    a piston mounted for reciprocation in said accumulator from a fully extended position to a fully depressed position, said piston and said accumulator defining a pump chamber;

    an outlet valve for said pump chamber;

    a spring for biasing said piston; and

    a valve stem mounted within said pump chamber, said valve stem comprising a valve surface cooperating with an inlet valve seat thereby to form an inlet valve for said pump chamber, said valve stem further comprising an axially outward terminal end cooperating with an outlet of said pump chamber only in said fully depressed position of said piston, said axially outward terminal end sealing said outlet only in said fully depressed position.

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