×

Portable negative pressure wound therapy device

  • US 8,257,328 B2
  • Filed: 06/17/2009
  • Issued: 09/04/2012
  • Est. Priority Date: 07/08/2008
  • Status: Active Grant
First Claim
Patent Images

1. A portable negative pressure wound therapy system comprising:

  • a dressing assembly for positioning over a wound to apply a negative pressure to the wound; and

    a canister assembly dimensioned to be worn by a user, said canister assembly including;

    a control unit having a negative pressure source and a controller; and

    a collection canister in communication with the dressing assembly and having a chamber operable to receive fluid from the wound, the collection canister including;

    a suction port in fluid communication with said negative pressure source; and

    a ball float arrangement having a ball float operable to substantially close said suction port in response to one of collection of a predetermined volume of exudate in the collection canister, tilting of the collection canister beyond a predetermined angle of orientation or inversion of the collection canister,wherein said ball float has at least one groove.

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