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Recording sphygmomanometer sphygpressure graph

  • US 4,015,594 A
  • Filed: 06/14/1976
  • Issued: 04/05/1977
  • Est. Priority Date: 06/14/1976
  • Status: Expired due to Term
First Claim
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1. A blood-pressure-measuring device, comprising:

  • a blood-flow-restricting sleeve;

    pump means for pressurizing said sleeve;

    a housing secured to said sleeve, said housing having an aperture communicating with the interior of said sleeve;

    a right-angular tube telescopically received at one end portion within the housing aperture;

    a first spring normally biasing said one end portion of said right-angular tube into the aperture;

    ratchet means including a rack pivotally supported by said housing in overlying relation with respect to said one end portion of said right-angular tube, said rack having a series of ratchet teeth projecting toward said right-angular tube;

    a pawl secured to said right-angular tube and engaged by said ratchet teeth permitting telescopic movement of said right-angular tube into the housing aperture and preventing telescopic extending movement of said right-angular tube out of the housing aperture;

    a scribing tube having one closed end and having its open end telescopically received within the other end portion of said right-angular tube;

    a second spring within said scribing tube normally biasing said scribing tube into said other end portion of said right-angular tube;

    graph paper supported by said housing; and

    a stylus secured to the closed end of said scribing tube and contacting said graph paper.

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