US3417838A - Funnel of flexible stethoscope for mediate auscultation - Google Patents

Funnel of flexible stethoscope for mediate auscultation Download PDF

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Publication number
US3417838A
US3417838A US601593A US60159366A US3417838A US 3417838 A US3417838 A US 3417838A US 601593 A US601593 A US 601593A US 60159366 A US60159366 A US 60159366A US 3417838 A US3417838 A US 3417838A
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US
United States
Prior art keywords
funnel
housing
stethoscope
flexible
duct
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US601593A
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English (en)
Inventor
Shlyakhter Isaak Abramovich
Krupin Boris Nikolaevich
Gismatullin Ravil Ibragimovich
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Individual
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Individual
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Publication date
Priority to FR1498760D priority Critical patent/FR1498760A/fr
Priority to GB1126420D priority patent/GB1126420A/en
Application filed by Individual filed Critical Individual
Priority to US601593A priority patent/US3417838A/en
Application granted granted Critical
Publication of US3417838A publication Critical patent/US3417838A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B7/00—Instruments for auscultation
    • A61B7/02—Stethoscopes

Definitions

  • a stethoscope funnel having a circular housing with an open cavity of circular extent eccentrically disposed in the housing and defining an upper rim of variable thickness bounding the cavity.
  • a sound transfer duct opens into the cavity and is positioned at an acute angle with respect to the rim of the housing at the location of smallest width of the housing.
  • This invention relates to flexible stethoscopes for performing mediate auscultation and more particularly to the funnels of said stethoscopes.
  • a further and more specific object of the invention is to provide a funnel of such a design that it is possible to attain the maximum level of transmission of sound energy from a reception space to a sound transfer duct, thereby improving the acoustic susceptibility of said funnel while detecting pathologic symptoms in the sound signal being heard.
  • the axis of the sound transfer duct makes an acute angle with the plane of the annular surface which contacts the body of the patient being auscultated.
  • the said annular surface is confined within eccentric circumferences such that the annular surface has its greatest width on the side opposite the side on which the sound transfer duct is connected to the annular surface.
  • FIG. 1 is a diagrammatic side sectional view of the funnel according to the invention taken on lines IIII;
  • FIlgIG. 2 is a plan view of the funnel as illustrated in
  • the funnel of a flexible stethoscope of the present invention comprises a circular housing H which has an annular-shaped surface or rim 1 which contacts the body of the patient being auscultated, said surface 1 being disposed in a plane P which makes an acute angle a with the axis of a sound transfer duct 2, said duct being connected to a reception space or cavity 3 provided in housing H.
  • the reception space is eccentrically located in housing H and annular-shaped surface 1 has its greatest Width on the side opposite that at which the sound transfer duct 2 enters the cavity 3.
  • the maximum width W is diametrically opposite duct 2 whereas the minimum width W, is closest to the duct.
  • the boundary of the space 3 in plane P is designated by numeral 4 and is circular as shown in FIG. 2, while the boundary of the housing H in plane P is also circular and designated by numeral 5.
  • the axis of duct 2 lies in a plane which passes diametrically through circular boundaries 4 and 5.
  • the funnel of the present invention features high acoustic properties and an advanced acoustic susceptibility thus enabling pathologic symptoms in the sounds inherent in a human organism to be revealed and recognized With a high degree of accuracy, this due to the fact that the design of the funnel embodying the present invention provides for the highest concentration of the sonic waves in close proximity to the sound transfer duct.
  • a stethoscope funnel comprising a cylindrical housing having an upper and lower surface, the lower surface being perpendicular to the axis of the housing, the upper surface being inclined at an acute angle with respect to said lower surface, said housing having a circular sound cavity in said upper surface which is offset therein to form a rim of varying Width surrounding the said cavity, said rim having a minimum width at the point of greatest depth of the housing and a maximum width at the point of minimum depth of the housing, and a duct in said housing at the point-of maximum depth thereof, said duct extending parallel to said lower surface and opening into said cavity in the region of minimum width of the rim and remote from the region of maximum width of the rim.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Percussion Or Vibration Massage (AREA)
  • External Artificial Organs (AREA)
US601593A 1966-12-14 1966-12-14 Funnel of flexible stethoscope for mediate auscultation Expired - Lifetime US3417838A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR1498760D FR1498760A (enrdf_load_stackoverflow) 1966-12-14
GB1126420D GB1126420A (enrdf_load_stackoverflow) 1966-12-14
US601593A US3417838A (en) 1966-12-14 1966-12-14 Funnel of flexible stethoscope for mediate auscultation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US601593A US3417838A (en) 1966-12-14 1966-12-14 Funnel of flexible stethoscope for mediate auscultation

Publications (1)

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US3417838A true US3417838A (en) 1968-12-24

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US601593A Expired - Lifetime US3417838A (en) 1966-12-14 1966-12-14 Funnel of flexible stethoscope for mediate auscultation

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US (1) US3417838A (enrdf_load_stackoverflow)
FR (1) FR1498760A (enrdf_load_stackoverflow)
GB (1) GB1126420A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3867925A (en) * 1971-02-17 1975-02-25 Med General Inc Expendable stethoscope
USD932008S1 (en) * 2019-11-07 2021-09-28 Wuxi Kaishun Medical Device Manufacturing Co., Ltd. Stethoscope head

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1164669A (enrdf_load_stackoverflow) *
FR1208208A (enrdf_load_stackoverflow) * 1900-01-01
US677172A (en) * 1897-12-03 1901-06-25 Robert C M Bowles Stethoscope.
US910854A (en) * 1909-01-26 Charles J Pilling Stethoscope.
US1853951A (en) * 1932-04-12 Membrane stethoscope-phonendoscope for comparative
US2445917A (en) * 1945-01-24 1948-07-27 John M Mallory Blood pressure stethoscope
US3276536A (en) * 1966-10-04 Littmann stethoscope
US3339667A (en) * 1966-08-02 1967-09-05 Propper Mfg Company Inc Stethoscope

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1164669A (enrdf_load_stackoverflow) *
FR1208208A (enrdf_load_stackoverflow) * 1900-01-01
US910854A (en) * 1909-01-26 Charles J Pilling Stethoscope.
US1853951A (en) * 1932-04-12 Membrane stethoscope-phonendoscope for comparative
US3276536A (en) * 1966-10-04 Littmann stethoscope
US677172A (en) * 1897-12-03 1901-06-25 Robert C M Bowles Stethoscope.
US2445917A (en) * 1945-01-24 1948-07-27 John M Mallory Blood pressure stethoscope
US3339667A (en) * 1966-08-02 1967-09-05 Propper Mfg Company Inc Stethoscope

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3867925A (en) * 1971-02-17 1975-02-25 Med General Inc Expendable stethoscope
USD932008S1 (en) * 2019-11-07 2021-09-28 Wuxi Kaishun Medical Device Manufacturing Co., Ltd. Stethoscope head

Also Published As

Publication number Publication date
FR1498760A (enrdf_load_stackoverflow)
GB1126420A (enrdf_load_stackoverflow)

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