US3570476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetostrictive medical instrument
Assignee: Individual
•
Filing: 1968-11-18
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Granted: 1971-03-16
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Expires: 1988-11-18
Abstract
Abstract A medical instrument which may be inserted into an artery of a patient, and which includes a magnetostrictive element that serves to remove cholesterol or other fatty deposits from the interior wall of the artery. The term ''''magnetostrictive'''' as used herein is intended to embrace the equivalent elements, such as ''''piezoelectric'''' and ''''electrostrictive'''' in which mechanical vibrations may be set up by the application of electrical energy.
Inventors
- 👤 David Paul Gregg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:05
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/22; A61B17/22004; A61B17/22012; A61B17/2202; A61M; A61M1/00; A61M1/71; A61M1/77; A61M5/00; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2002/30001; A61F2002/30667; A61F2002/30668; A61F2250/00; A61F2250/0001; A61M3/00; A61M3/02; A61M3/0279; A61M3/0283
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
134 words
A medical instrument for removing deposits from the interior wall of an artery, or the like, of a subject, including: an element composed of magnetostrictive material configured to be received into the interior of the artery and can be moved therealong so as to establish mechanical vibrations within said artery with respect to an applied signal; an electrical winding mounted on said element to establish the aforesaid magnetostrictions therein upon the passage of an alternating current of ultrasonic frequency through said winding; a magnetic core of magnetizable material physically separated from said element and positioned externally of the subject; a primary winding mounted on said magnetic core and inductively coupled to the aforesaid electrical winding on said element; and means for causing an alternating current of ultrasonic frequency to flow in said primary winding.
Claim 2
Dependent Claim
134 words
A medical instrument for removing deposits from the interior wall of an artery, or the like, of a subject, including: an element composed of magnetostrictive material configured to be received into the interior of the artery and can be moved therealong so as to establish mechanical vibrations within said artery with respect to an applied signal; an electrical winding mounted on said element to establish the aforesaid magnetostrictions therein upon the passage of an alternating current of ultrasonic frequency through said winding; a magnetic core of magnetizable material physically separated from said element and positioned externally of the subject; a primary winding mounted on said magnetic core and inductively coupled to the aforesaid electrical winding on said element; and means for causing an alternating current of ultrasonic frequency to flow in said primary winding.
Claim 3
Dependent Claim
24 words
The instrument defined in claim 1, and which includes a ring-shaped core of magnetizable material supporting said primary winding and having an airgap therein.
Claim 4
Dependent Claim
48 words
The instrument defined in claim 1 and which includes a power source coupled to said primary winding for producing said alternating current in said primary winding, and an indicating meter coupled to said source to indicate the position of the aforesaid element with respect to said primary winding.
Claim 5
Dependent Claim
148 words
A medical instrument for removing deposits from the interior wall of an artery, or the like, including: an element composed of material configured to be received into the interior of the artery and to be moved therealong and to establish mechanical vibrations in response to an applied signal; and means coupled to said element For applying a signal thereto for establishing said vibrations therein as said element moves along the interior of the artery so as to cause the element to remove deposits from the interior wall of the artery, in which said element has an elongated rodlike configuration, and which includes electrical contacts mounted on the ends of said element, and which includes an electrical winding mounted on said element and having ends connected to said contacts to establish mechanical vibrations in said element upon the passage of an alternating current of ultrasonic frequency through said winding.
Claim 6
Dependent Claim
148 words
A medical instrument for removing deposits from the interior wall of an artery, or the like, including: an element composed of material configured to be received into the interior of the artery and to be moved therealong and to establish mechanical vibrations in response to an applied signal; and means coupled to said element For applying a signal thereto for establishing said vibrations therein as said element moves along the interior of the artery so as to cause the element to remove deposits from the interior wall of the artery, in which said element has an elongated rodlike configuration, and which includes electrical contacts mounted on the ends of said element, and which includes an electrical winding mounted on said element and having ends connected to said contacts to establish mechanical vibrations in said element upon the passage of an alternating current of ultrasonic frequency through said winding.
Claim 7
Dependent Claim
16 words
The medical instrument defined in claim 4, in which said element is composed of electrostrictive material.
Claim 8
Dependent Claim
16 words
The medical instrument defined in claim 4, in which said element is composed of piezoelectric material.
Claim 9
Dependent Claim
101 words
A medical instrument for removing deposits from the interior wall of an artery, or the like, including: an element composed of magnetostrictive material configured to be received into the interior of the artery and to be moved therealong and to establish mechanical vibrations in response to an applied signal; means coupled to said element for applying a signal thereto for establishing said vibrations therein as said element moves along the interior of the artery so as to cause the element to remove deposits from the interior wall of the artery, and which includes a biasing permanent magnet coupled to said element.
Claim 10
Dependent Claim
101 words
A medical instrument for removing deposits from the interior wall of an artery, or the like, including: an element composed of magnetostrictive material configured to be received into the interior of the artery and to be moved therealong and to establish mechanical vibrations in response to an applied signal; means coupled to said element for applying a signal thereto for establishing said vibrations therein as said element moves along the interior of the artery so as to cause the element to remove deposits from the interior wall of the artery, and which includes a biasing permanent magnet coupled to said element.
Claim 11
Dependent Claim
41 words
The medical instrument defined in claim 7, and which includes a damping member mounted on said element, and in which said biasing permanent magnet is mounted on said element and interposed between said damping member and one end of said element.
Claim 12
Dependent Claim
31 words
The medical instrument defined in claim 7, and which includes a damping member mounted on said element, and in which said biasing permanent magnet extends into a slot in said element.
References Cited (Backward Citations)
US3433226A
Cited
US3352303A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-15 | 1974-09-14 | 1975-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-15 | 1978-09-14 | 1979-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-15 | 1982-09-14 | 1983-03-16 | $7700.00 | Window Closed / Lapsed |