US3584983A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous output pump
Assignee: Mennen Greatbatch Electronics Inc
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Filing: 1969-11-03
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Granted: 1971-06-15
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Expires: 1989-11-03
Abstract
Abstract A pump for delivering a continuous or uniform i.e., not pulsating, flow of liquid through a flexible tubing. A pump body is provided with an annular recess open at one axial end face thereof, and the body is rotatably mounted on a drive shaft. A sleeve is rotatably connected on axially adjacent camming elements on the drive shaft, and one sleeve axial end face extends into the pump body annular recess. A flexible tubing enters the annular recess and extends therearound for a length greater than one circumferential length of the recess, in particular exiting from the body through the same opening through which it enters. One end of the tubing is connected to a source, for example a reservoir of anticoagulant liquid, and the other end to a load, such as a catheter inserted into the arm of a patient and operatively connected to a pressure transducer.
Inventors
- 👤 Daniel T Hindman
- 👤 Karl A Baake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:06
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/12; F04B43/1207
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
253 words
A pump for delivering a continuous output flow comprising: a. a generally cylindrical pump body provided with an annular recess open at one axial end face thereof and with an opening through the wall of said body communicating with said annular recess; b. a drive shaft rotatably mounted in said pump body and disposed so that the axis thereof is coincident with the axis of said annular recess; c. a sleeve having an outer diameter slightLy less than the diameter of the outer surface of said annular recess in said pump body and having an axial end face of a radial width less than the radial width of said annular recess, said sleeve being mounted for nutating movement about the axis of said drive shaft and at an axial position thereon so that said sleeve extends partially into said annular recess in said pump body so as to define an annular region therein; d. whereby upon rotation of said shaft said sleeve is nutated about the axis of said shaft; and e. a single length of flexible tubing extending through said opening in the wall of said pump body so as to enter said annular region therein, said tubing extending around said annular region for a length greater than one circumferential length of said annular region by an amount such that during one complete rotation of said shaft a portion of the length of said tubing in said annular region always will be compressed by said sleeve sufficiently to prevent any reverse flow.
Claim 2
Dependent Claim
253 words
A pump for delivering a continuous output flow comprising: a. a generally cylindrical pump body provided with an annular recess open at one axial end face thereof and with an opening through the wall of said body communicating with said annular recess; b. a drive shaft rotatably mounted in said pump body and disposed so that the axis thereof is coincident with the axis of said annular recess; c. a sleeve having an outer diameter slightLy less than the diameter of the outer surface of said annular recess in said pump body and having an axial end face of a radial width less than the radial width of said annular recess, said sleeve being mounted for nutating movement about the axis of said drive shaft and at an axial position thereon so that said sleeve extends partially into said annular recess in said pump body so as to define an annular region therein; d. whereby upon rotation of said shaft said sleeve is nutated about the axis of said shaft; and e. a single length of flexible tubing extending through said opening in the wall of said pump body so as to enter said annular region therein, said tubing extending around said annular region for a length greater than one circumferential length of said annular region by an amount such that during one complete rotation of said shaft a portion of the length of said tubing in said annular region always will be compressed by said sleeve sufficiently to prevent any reverse flow.
Claim 3
Dependent Claim
34 words
A pump as defined in claim 1 wherein the point of exit of said tubing from said pump body is positioned circumferentially beyond the point of entry of said tubing into said pump body.
Claim 4
Dependent Claim
33 words
A pump as defined in claim 1 wherein said flexible tubing leaves the annular region in said pump body through the same opening in the wall of said body through which it enters.
Claim 5
Dependent Claim
17 words
A pump as defined in claim 1 wherein said sleeve is rotatably mounted on said drive shaft.
Claim 6
Dependent Claim
50 words
A pump as defined in claim 1 wherein said drive shaft comprises: a. a first part rotatably mounted in said pump body; and b. a second part rotatably mounted in said sleeve and having first and second axially adjacent camming elements on which said sleeve is connected for nutating movement.
Claim 7
Dependent Claim
19 words
A pump as defined in claim 5 wherein said first and second drive shaft parts are threadably connected together.
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) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |