Resources Contact Us Home
Wound drainage device

Image Number 6 for United States Patent #4578060.

A device for removing fluids from a wound includes a housing and a resilient bellows inside the housing. The bellows can be collapsed and retained in a collapsed or activated state. Upon release from its activated state, the bellows is expanded so as to create a negative pressure therein whereupon fluids are automatically drawn into and collected within the bellows. Preferably the bellows is expanded by a variable force ribbon spring so that the resultant or combined restoring force provided by the resilient bellows and the variable force ribbon spring allows for the creation of a substantially constant level of negative pressure within the bellows so as to provide for a substantially constant level of suction of the device throughout the range of evacuation of fluids therein. The housing is preferably transparent with graduations provided thereon permitting the visible inspection and measurement of the fluids collected therein. A method for operating the device is also disclosed.

  Recently Added Patents
Semiconductor fin device and method for forming the same using high tilt angle implant
Rupture resistant system
Hybrid asynchronous transmission process
Snap-engagement structure
Apparatus and method to simulate a power trip to a disk drive
Fabric care compositions comprising front-end stability agents
  Randomly Featured Patents
Asymmetrical siloxane
Electronic apparatus with backlighting device
Bubbling display panel
Container for use in collecting debris
Timer apparatus and computer
Fail memory circuit and interleave copy method of the same
Synthetic resin container having inverted, folded back bottom wall
Image capturing apparatus that records captured image and location information in association with each other
Structural backbone/motor mount for a power tool
Horizontal goods transfer apparatus