×

Plunger for nozzle assembly

  • US 5,921,967 A
  • Filed: 12/24/1996
  • Issued: 07/13/1999
  • Est. Priority Date: 02/29/1996
  • Status: Expired due to Term
First Claim
Patent Images

1. A plunger slidingly movable within a fluid chamber for expelling fluid out of or drawing fluid into the chamber by moving the plunger relative to the chamber, the plunger comprising first and second driving members which include respective end and base portions retained in spaced relation by a frangible connection therebetween, with the second driving member being spaced apart from the first driving member by a gap, such that when a force sufficient to break the frangible connection is applied to the second driving member in a direction toward the first driving member, the frangible connection is broken and the second driving member moves across said gap toward the first driving member for urging the first driving member towards an end of the chamber to expel fluid therefrom, and when the second driving member is thereafter moved away from the first driving member, the first driving member remains in the chamber to prevent reuse of the plunger.

View all claims
  • 4 Assignments
Timeline View
Assignment View
    ×
    ×