US3656478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Infusion monitor utilizing weight detecting means
Assignee: Brookline Instrument Co Inc
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Filing: 1970-04-13
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Granted: 1972-04-18
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Expires: 1990-04-13
Abstract
Abstract The infusion monitor is adapted to operate at a high speed or a low speed in dependence upon a variable characteristic of the patient, such as weight. If during infusion, the weight of the patient deviates from a preset value the infusion monitor speed is changed. For example, with the infusion monitor operating at the normal low speed, if the weight decreases, the infusion monitor is switched to the high speed. When the weight subsequently returns to the preset value, the infusion monitor switches back to the low speed.
Inventors
- 👤 Burt L Swersey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:53
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/14; A61M5/168; A61M5/16886; A61M5/16895; A61M5/16831; A61M5/1684; A61M5/16845
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
158 words
An infusion moniTor comprising a conduit for connection to a consumer; a pump for delivering fluid through said conduit to the consumer; first means connected to said pump for actuating said pump to deliver fluid at a low rate through said conduit; second means connected to said pump for actuating said pump to deliver fluid at a high rate through said conduit; and a scale means for indicating deviations of weight of the consumer about a predetermined value, said scale means being connected to said first means and said second means to selectively actuate one of said first and second means in response to predetermined deviations of the weight about said predetermined value whereby in response to a deviation in excess of said predetermined value said scale means actuates said first means and in response to a deviation less than said predetermined value said scale means actuates said second means to maintain the consumer at a constant weight.
Claim 2
Dependent Claim
158 words
An infusion moniTor comprising a conduit for connection to a consumer; a pump for delivering fluid through said conduit to the consumer; first means connected to said pump for actuating said pump to deliver fluid at a low rate through said conduit; second means connected to said pump for actuating said pump to deliver fluid at a high rate through said conduit; and a scale means for indicating deviations of weight of the consumer about a predetermined value, said scale means being connected to said first means and said second means to selectively actuate one of said first and second means in response to predetermined deviations of the weight about said predetermined value whereby in response to a deviation in excess of said predetermined value said scale means actuates said first means and in response to a deviation less than said predetermined value said scale means actuates said second means to maintain the consumer at a constant weight.
Claim 3
Dependent Claim
17 words
An infusion monitor as set forth in claim 1 wherein said predetermined value is a variable value.
Claim 4
Dependent Claim
18 words
An infusion monitor as set forth in claim 1 wherein said pump is an eccentric wobble plate pump.
Claim 5
Dependent Claim
29 words
An infusion monitor as set forth in claim 1 further comprising means connected between said scale means and said second means for adjusting the value of said predetermined deviation.
Claim 6
Dependent Claim
32 words
An infusion monitor as set forth in claim 1 which further comprises one digital read-out for indicating a low pumping rate and a second digital read-out for indicating a high pumping rate.
Claim 7
Dependent Claim
30 words
An infusion monitor as set forth in claim 1 which further comprises a digital read out connected to said pump means for indicating the total amount of fluid pumped therethrough.
Claim 8
Dependent Claim
47 words
An infusion monitor as set forth in claim 1 further comprising an adjusting means in said housing for adjusting said switch means to switch the operation of said pump means from one rate to the other rate in response to the measured deviation exceeding a preset amount.
Claim 9
Dependent Claim
106 words
An infusion monitor comprising a pump for pumping fluid through a conduit to a consumer; first means connected to said pump to selectively actuate said pump at one of a high speed and a low speed to pump different rates of fluid flow through the conduit; a read out scale for determining the weight of a consumer, said scale being connected to said first means to cause said first means to actuate said pump at said low speed in response to said weight exceeding a predetermined value and to actuate said pump at said high speed in response to said weight falling below the predetermined value.
Claim 10
Dependent Claim
106 words
An infusion monitor comprising a pump for pumping fluid through a conduit to a consumer; first means connected to said pump to selectively actuate said pump at one of a high speed and a low speed to pump different rates of fluid flow through the conduit; a read out scale for determining the weight of a consumer, said scale being connected to said first means to cause said first means to actuate said pump at said low speed in response to said weight exceeding a predetermined value and to actuate said pump at said high speed in response to said weight falling below the predetermined value.
Claim 11
Dependent Claim
15 words
An infusion monitor as set forth in claim 8 wherein said predetermined value is variable.
Claim 12
Dependent Claim
29 words
An infusion monitor as set forth in claim 8 which further comprises an adjustable means for adjusting the predetermined value for actuation of said pump at said high speed.
Claim 13
Dependent Claim
135 words
In combination a scale for weighing a patient; first means for infusing fluid into the patient at one of two rates of infusion, and second means connected to said scale and said first means for determining deviations in weight of the patient and selectively actuating said first means to one of said two rates of infusion in response to predetermined deviations of weight from a preset value of weight, said second means actuating said first means to infuse fluid into the patient at the lower of said two rates in response to the weight of the patient exceeding the preset value and said second means actuating said first means to infuse fluid into the patient at the higher of said two rates in response to the weight of the patient falling below the preset value.
Claim 14
Dependent Claim
135 words
In combination a scale for weighing a patient; first means for infusing fluid into the patient at one of two rates of infusion, and second means connected to said scale and said first means for determining deviations in weight of the patient and selectively actuating said first means to one of said two rates of infusion in response to predetermined deviations of weight from a preset value of weight, said second means actuating said first means to infuse fluid into the patient at the lower of said two rates in response to the weight of the patient exceeding the preset value and said second means actuating said first means to infuse fluid into the patient at the higher of said two rates in response to the weight of the patient falling below the preset value.
Claim 15
Dependent Claim
45 words
The combination as set forth in claim 11 wherein said second means actuates said first means to infuse fluid into the patient at the higher of said two rates in response to the weight of the patient falling a predetermined amount below the preset value.
Claim 16
Dependent Claim
137 words
In combination a scale for measuring the weight of a patient Including a line for emitting a signal in response to a deviation in weight from a predetermined value; a rate monitor for changing said value during a measurement of weight of the patient; and an infusion monitor connected to said scale for infusing a fluid into the patient at at least one of a low speed rate and a high speed rate, said infusion monitor having means therein for selectively infusing fluid into the patient at the high speed rate in response to a decrease in weight of the patient from said value and at a low speed in response to an increase in weight of the patient from said value, and means for adjusting said rate monitor to change said value at a predetermined rate.
Claim 17
Dependent Claim
137 words
In combination a scale for measuring the weight of a patient Including a line for emitting a signal in response to a deviation in weight from a predetermined value; a rate monitor for changing said value during a measurement of weight of the patient; and an infusion monitor connected to said scale for infusing a fluid into the patient at at least one of a low speed rate and a high speed rate, said infusion monitor having means therein for selectively infusing fluid into the patient at the high speed rate in response to a decrease in weight of the patient from said value and at a low speed in response to an increase in weight of the patient from said value, and means for adjusting said rate monitor to change said value at a predetermined rate.
Claim 18
Dependent Claim
20 words
The combination as set forth in claim 13 wherein said means for adjusting said rate monitor includes a digital readout.
Claim 19
Dependent Claim
15 words
The combination as set forth in claim 14 wherein said digital readout is manually adjustable.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-18 | 1975-10-18 | 1976-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-18 | 1979-10-18 | 1980-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-18 | 1983-10-18 | 1984-04-18 | $7700.00 | Window Closed / Lapsed |