Residual pressure control in a compression device

Residual pressure control in a compression device

  • CN 103,705,372 B
  • Filed: 09/17/2013
  • Issued: 10/23/2020
  • Est. Priority Date: 09/28/2012
  • Status: Active Grant
First Claim
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1. A compression device for applying compression therapy to a body part of a subject, the compression device comprising:

  • a controller;

    a source of pressurized fluid configured to supply pressurized fluid;

    a manifold configured to receive the pressurized fluid from the pressurized fluid source when the pressurized fluid source is activated;

    a first inflatable bladder configured to receive the pressurized fluid from the manifold; and

    a 3-way/2-position, normally-open first valve in fluid communication with the first inflatable bladder, the 3-way/2-position, normally-open first valve being actuatable by a controller to control the discharge of the pressurized fluid from the first inflatable bladder, and the 3-way/2-position, normally-open first valve having no check valve;

    wherein the 3-way/2-position, normally-open first valve includes three ports and is actuatable from a first position to an exhaust position, wherein in the first position, a first inlet port is in fluid communication with a second bladder port, placing the manifold in fluid communication with the first inflatable bladder, and wherein in the exhaust position, the second bladder port is in fluid communication with a third exhaust port, placing the first inflatable bladder in communication with ambient atmosphere, andwherein the controller has a processor configured to execute computer-executable instructions including instructions for;

    (i) delivering pressurized fluid from the manifold to the first inflatable bladder,(ii) discharging the pressurized fluid from the first inflatable bladder to within a desired residual pressure range during the discharge of the pressurized fluid from the first inflatable bladder;

    (iii) monitoring fluid pressure in the first inflatable bladder after the desired residual pressure range is reached; and

    (iv) selectively placing the first valve in the first position to increase pressure in the first inflatable bladder to an upper end of the desired residual pressure range and placing the first valve in the venting position to vent pressure in the first inflatable bladder to a lower end of the desired residual pressure range when the pressurized fluid source is not activated based at least in part on the monitored fluid pressure.

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