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

• Current Assignee: Lilian Ellen Siverson
• Original Assignee: Lilian Ellen Siverson
• Inventors: Siverson, Lilian Ellen
• Primary Examiner(s): Howell, Kyle L.
• Application Number:
  US05/696,039
• Time in Patent Office: 295 Days
• Field of Search: 128/2.05 G, 128/2.05 Q, 128/2.05 M, 128/2.05 C, 128/2.05 A, 346/33 ME, 346/139 R, 346/72
• US Class Current: 600/490
• CPC Class Codes: A61B 5/022 by applying pressure to close blood vessels, e.g. against the skin; Ophthalmodynamometers
• CPC Class Codes: A61B 5/02233 Occluders specially adapted therefor tourniquets A61B17/132
• CPC Class Codes: A61B 5/0255 Recording instruments specially adapted therefor
• CPC Class Codes: G01D 9/10 the recording element, e.g. stylus, being controlled in accordance with the variable, and the recording medium, e.g. paper roll, being controlled in accordance with time
• CPC Class Codes: Y10S 128/90 Blood pressure recorder

Abstract

A sphygpressure graph of the aneroid gauge type including a housing, connected with a sphygmocuff, supporting a series of telescoping tubes, connected in right angular relation, and a stylus, mounted on the endmost tube, movable over a chart to scribe the blood pressures. A ratchet and pawl arrangement engaging the telescoping tubes prevents reciprocating action of pulse pressure moving the stylus in a to and fro movement transversely over a graph paper but records the pulse by longitudinally scribing a graph paper during release of pressure from the sphygmocuff.

Claims

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.