Patent US3578872A successfully refreshed from Google Patents.
US3578872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speed and torque control for surgical turbine
Assignee: AIR INSTRUMENTS Inc
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Filing: 1969-11-14
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Granted: 1971-05-18
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Expires: 1989-11-14
Abstract
Abstract A turbine-driven rotary tool has a rotary member mounted to turn within a stationary housing, and a rotary torque plate is mounted within the housing. The torque plate has a flange carrying a peripheral rim, and the flange is provided with a series of apertures. An elastomeric ring encircled by the rim acts to close the apertures when the ring is expanded by centrifugal force into contact with the rim, so that maximum speed of the rotary member is limited by flow of motive fluid around the outside of the rim, and whereby maximum torque is determined by flow of motive fluid through the apertures.
Inventors
- 👤 Thomas W Mcburnie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:25
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/16; A61B17/1613; A61B17/1626; A61B90/00; A61B90/03; A61B2090/031; Y; Y10; Y10S; Y10S415/00; Y10S415/904
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
152 words
In a turbine driven rotary tool, the combination of: a rotary member rotatably mounted to turn within a stationary housing, passage means in said housing for supplying motive fluid to the turbine and discharging it therefrom, an element within the housing connected to rotate with said member and positioned in said passage means, a portion of said passage means between the ends thereof being divided into two paths, said element having a series of apertures, the proportions of said element and the housing providing a first path for motive fluid between the periphery of said element and the housing, the second path being through said apertures, an elastomeric ring acting to close said apertures when the ring is expanded by centrifugal force, whereby maximum speed of the spindle is determined by flow of motive fluid through said first path, and maximum torque is determined by flow of motive fluid through both paths.
Claim 2
Dependent Claim
152 words
In a turbine driven rotary tool, the combination of: a rotary member rotatably mounted to turn within a stationary housing, passage means in said housing for supplying motive fluid to the turbine and discharging it therefrom, an element within the housing connected to rotate with said member and positioned in said passage means, a portion of said passage means between the ends thereof being divided into two paths, said element having a series of apertures, the proportions of said element and the housing providing a first path for motive fluid between the periphery of said element and the housing, the second path being through said apertures, an elastomeric ring acting to close said apertures when the ring is expanded by centrifugal force, whereby maximum speed of the spindle is determined by flow of motive fluid through said first path, and maximum torque is determined by flow of motive fluid through both paths.
Claim 3
Dependent Claim
189 words
In a turbine driven rotary tool, the combination of: a rotary member including a spindle and a bladed turbine mounted to turn within a stationary housing, means at one end of said spindle for driving a drill bit, passage means in said housing for supplying motive fluid to said turbine and discharging it therefrom, a torque plate within the housing connected to rotate with said member and positioned in said passage means, said torque plate having a flange carrying a peripheral rim, the flange having a series of apertures, a portion of said passage means between the ends thereof being divided into two paths, the proportions of the torque plate and the housing providing a first path for motive fluid between the rim and the housing, the second path being through said apertures, an elastomeric ring encircled by said rim and acting to close said apertures when the ring is expanded by centrifugal force into contact with said rim, whereby maximum speed of the spindle is determined by flow of motive fluid through said first path, and maximum torque is determined by flow of motive fluid through both paths.
Claim 4
Dependent Claim
189 words
In a turbine driven rotary tool, the combination of: a rotary member including a spindle and a bladed turbine mounted to turn within a stationary housing, means at one end of said spindle for driving a drill bit, passage means in said housing for supplying motive fluid to said turbine and discharging it therefrom, a torque plate within the housing connected to rotate with said member and positioned in said passage means, said torque plate having a flange carrying a peripheral rim, the flange having a series of apertures, a portion of said passage means between the ends thereof being divided into two paths, the proportions of the torque plate and the housing providing a first path for motive fluid between the rim and the housing, the second path being through said apertures, an elastomeric ring encircled by said rim and acting to close said apertures when the ring is expanded by centrifugal force into contact with said rim, whereby maximum speed of the spindle is determined by flow of motive fluid through said first path, and maximum torque is determined by flow of motive fluid through both paths.
Claim 5
Dependent Claim
17 words
The combination set forth in claim 2 in which the elastomeric ring is circular in cross section.
Claim 6
Dependent Claim
188 words
In a turbine driven rotary tool, the combination of: a spindle rotatably mounted within a stationary housing, means at one end of said spindle for driving a drill bit, a bladed turbine connected to drive said spindle, passage means in said housing for supplying motive fluid to said turbine and discharging it therefrom, a torque plate within the housing connected to rotate with said spindle and positioned in said passage means, said torque plate having a flange carrying a peripheral rim, the flange having a series of apertures, a portion of said passage means between the ends thereof being divided into two paths, the proportions of the torque plate and the housing providing a first path for motive fluid between the rim and the housing, the second path being through said apertures, an elastomeric ring encircled by said rim and acting to close said apertures when the ring is expanded by centrifugal force into contact with said rim, whereby maximum speed of the spindle is determined by flow of motive fluid through said first path, and maximum torque is determined by flow of motive fluid through both paths.
Claim 7
Dependent Claim
188 words
In a turbine driven rotary tool, the combination of: a spindle rotatably mounted within a stationary housing, means at one end of said spindle for driving a drill bit, a bladed turbine connected to drive said spindle, passage means in said housing for supplying motive fluid to said turbine and discharging it therefrom, a torque plate within the housing connected to rotate with said spindle and positioned in said passage means, said torque plate having a flange carrying a peripheral rim, the flange having a series of apertures, a portion of said passage means between the ends thereof being divided into two paths, the proportions of the torque plate and the housing providing a first path for motive fluid between the rim and the housing, the second path being through said apertures, an elastomeric ring encircled by said rim and acting to close said apertures when the ring is expanded by centrifugal force into contact with said rim, whereby maximum speed of the spindle is determined by flow of motive fluid through said first path, and maximum torque is determined by flow of motive fluid through both paths.
Claim 8
Dependent Claim
67 words
For use with a turbine driven rotary tool having a rotary member mounted to turn within a stationary housing, the subcombination of a rotary torque plate having a flange carrying a peripheral rim, the flange having a series of apertures, and an elastomeric ring encircled by said rim and acting to close said apertures when the ring is expanded by centrifugal force into contact with said rim.
Claim 9
Dependent Claim
67 words
For use with a turbine driven rotary tool having a rotary member mounted to turn within a stationary housing, the subcombination of a rotary torque plate having a flange carrying a peripheral rim, the flange having a series of apertures, and an elastomeric ring encircled by said rim and acting to close said apertures when the ring is expanded by centrifugal force into contact with said rim.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-17 | 1974-11-16 | 1975-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-17 | 1978-11-16 | 1979-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-17 | 1982-11-16 | 1983-05-18 | $7700.00 | Window Closed / Lapsed |