Patent US3581734A successfully refreshed from Google Patents.
US3581734A
Expired / Lapsed
US
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Sphygmomanometer
Assignee: Phelps Dodge Electronic Products Corp
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Filing: 1968-01-31
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Granted: 1971-06-01
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Expires: 1988-01-31
Abstract
Abstract Blood pressure-indicating apparatus automatically produces persisting displays of arterial systolic and diastolic blood pressure values. An artery-occluding cuff, and a sensing cuff located distal thereto and connected in a closed pneumatic system containing an anemometer wire transducer, cooperate to generate the requisite display meter-latching signals. The systolic pressure is indicated only if a second pulse is detected within the expected time interval after a first detected pulse and is larger than the first pulse. The diastolic pressure is indicated only after the systolic pressure has been indicated and only after a pulse is detected which has a peak value less than 0.7 of the largest previous pulse detected.
Inventors
- 👤 Michael Emanuel Croslin
- 👤 John Ronald Keller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:37
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/02; A61B5/021; A61B5/022; A61B5/02225
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
307 words
In combination in a sphygmomanometer for automatically determining a subject ''s blood pressure, an occluding cuff, a detecting cuff adapted for use distal to said occluding cuff, closed detecting pneumatic means connected to said detecting cuff, means for inflating and deflating said occluding and detecting cuffs, detecting transducer means included in said closed pneumatic system, pressure transducer means for detecting the pressure in said occluding cuff, systolic pressure-indicating means, first circuit means for selectively connecting said pressure transducer means to said systolic pressure indicating means, and second circuit means connected to said detecting transducer means for selectively isolating said systolic pressure indicating means from said pressure transducer means, wherein said second circuit means includes means responsive to a first input signal generated by said detecting transducer means for provisionally isolating said systolic pressure-indicating means from said pressure transducer means such that said systolic pressure indicating means retains a reading when said first pulse occurred, said second circuit means further including means responsive to a second signal generated by said detecting transducer means within a predetermined time interval with respect to said first signal for finally isolating said systolic pressure indicating means to the value obtaining during the occurrence of said first input signal, wherein said second circuit means further comprises means for finally isolating said systolic pressure indicating means responsive to the amplitude of said second signal exceeding the amplitude of said first signal, said pulse amplitude responsive means included in said second circuit means comprising means for storing the peak amplitudes of consecutive pulses supplied by said detecting transducer means, difference responsive means for generating an output signal indicative of the larger of the stored pulse amplitudes, and commutating means for selectively steering signals supplied by said detecting transducer means to said peak amplitude storing means anD for selectively inverting the output of said difference-detecting means.
Claim 2
Dependent Claim
307 words
In combination in a sphygmomanometer for automatically determining a subject ''s blood pressure, an occluding cuff, a detecting cuff adapted for use distal to said occluding cuff, closed detecting pneumatic means connected to said detecting cuff, means for inflating and deflating said occluding and detecting cuffs, detecting transducer means included in said closed pneumatic system, pressure transducer means for detecting the pressure in said occluding cuff, systolic pressure-indicating means, first circuit means for selectively connecting said pressure transducer means to said systolic pressure indicating means, and second circuit means connected to said detecting transducer means for selectively isolating said systolic pressure indicating means from said pressure transducer means, wherein said second circuit means includes means responsive to a first input signal generated by said detecting transducer means for provisionally isolating said systolic pressure-indicating means from said pressure transducer means such that said systolic pressure indicating means retains a reading when said first pulse occurred, said second circuit means further including means responsive to a second signal generated by said detecting transducer means within a predetermined time interval with respect to said first signal for finally isolating said systolic pressure indicating means to the value obtaining during the occurrence of said first input signal, wherein said second circuit means further comprises means for finally isolating said systolic pressure indicating means responsive to the amplitude of said second signal exceeding the amplitude of said first signal, said pulse amplitude responsive means included in said second circuit means comprising means for storing the peak amplitudes of consecutive pulses supplied by said detecting transducer means, difference responsive means for generating an output signal indicative of the larger of the stored pulse amplitudes, and commutating means for selectively steering signals supplied by said detecting transducer means to said peak amplitude storing means anD for selectively inverting the output of said difference-detecting means.
Claim 3
Dependent Claim
53 words
A combination as in claim 1 wherein said second circuit means further includes means responsive to a first signal generated by said detecting transducer means and the absence of a following signal in a predetermined time interval following said first signal for reconnecting said pressure transducer means with said systolic pressure indicating means.
Claim 4
Dependent Claim
59 words
A combination as in claim 2 wherein said second circuit means further includes means responsive to two signals from said detecting transducer means occurring within a predetermined time interval of each other, with said second signal being smaller in amplitude than said first signal, for reconnecting and subsequently isolating said systolic pressure indicating means and said pressure transducer means.
Claim 5
Dependent Claim
257 words
In combination in a sphygmomanometer for automatically determining a subject''s blood pressure, an occluding cuff, a detecting cuff adapted for use distal to said occluding cuff, closed detecting pneumatic means connected to said detecting cuff, means for inflating and deflating said occluding and detecting cuffs, detecting transducer means included in said closed pneumatic system, pressure transducer means for detecting the pressure in said occluding cuff, systolic pressure indicating means, first circuit means for selectively connecting said pressure transducer means to said systolic pressure indicating means, second circuit means connected to said detecting transducer means for selectively isolating said systolic pressure indicating means from said pressure transducer means, diastolic pressure indicating means, third circuit means for selectively connecting said pressure transducer means with said diastolic pressure indicating means, and fourth circuit means connected to said detecting transducer means responsive to a predetermined pattern of signals generated by said detecting transducer means for isolating said pressure transducer means from said diastolic pressure-indicating means, said fourth circuit means including peak detecting means for storing a signal proportionately to the peak value of the largest of all the signals generated by said detecting transducer means in the pulse train of a monitoring cycle of operation, envelope detecting means for storing a signal indicative of the peak value of the most recent signal generated by said detecting transducer means, and diastolic display locking means responsive to the signal stored in said peak-detecting means exceeding the signal stored in said envelope-detecting means for isolating said diastolic pressure-indicating means from said pressure transducer means.
Claim 6
Dependent Claim
257 words
In combination in a sphygmomanometer for automatically determining a subject''s blood pressure, an occluding cuff, a detecting cuff adapted for use distal to said occluding cuff, closed detecting pneumatic means connected to said detecting cuff, means for inflating and deflating said occluding and detecting cuffs, detecting transducer means included in said closed pneumatic system, pressure transducer means for detecting the pressure in said occluding cuff, systolic pressure indicating means, first circuit means for selectively connecting said pressure transducer means to said systolic pressure indicating means, second circuit means connected to said detecting transducer means for selectively isolating said systolic pressure indicating means from said pressure transducer means, diastolic pressure indicating means, third circuit means for selectively connecting said pressure transducer means with said diastolic pressure indicating means, and fourth circuit means connected to said detecting transducer means responsive to a predetermined pattern of signals generated by said detecting transducer means for isolating said pressure transducer means from said diastolic pressure-indicating means, said fourth circuit means including peak detecting means for storing a signal proportionately to the peak value of the largest of all the signals generated by said detecting transducer means in the pulse train of a monitoring cycle of operation, envelope detecting means for storing a signal indicative of the peak value of the most recent signal generated by said detecting transducer means, and diastolic display locking means responsive to the signal stored in said peak-detecting means exceeding the signal stored in said envelope-detecting means for isolating said diastolic pressure-indicating means from said pressure transducer means.
Claim 7
Dependent Claim
64 words
A combination as in claim 4 wherein said diastolic display locking means further comprises counting means responsive to the coincidence of said stored value in said peak-detecting means exceeding said stored value in said envelope detecting means and the incidence of two input signals by said detecting transducer means following said coincidence for isolating said diastolic pressure indicating means from said pressure transducer means.
Claim 8
Dependent Claim
207 words
In combination in a sphygmomanometer for automatically determining a subject''s blood pressure, an occluding cuff, a detecting cuff adapted for use distal to said occluding cuff, closed detecting pneumatic means connected to said detecting cuff, means for selectively inflating and deflating said occluding and detecting cuffs, detecting transducer means included in said closed pneumatic system, pressure transducer means for detecting the pressure in said occluding cuff, systolic pressure indicating means, first circuit means for selectively connecting said pressure transducer means to said systolic pressure indicating means, second circuit means connected to said detecting transducer means for selectively isolating said systolic pressure indicating means from said pressure transducer means, said detecting transducer means including a first temperature responsive, variable resiStance element, means having two substantially identical chambers therein, one of said chambers being included in said detecting pneumatic means and the other of said chambers not being so included, said first variable resistance element being included in said chamber included in said closed pneumatic means, a second temperature responsive, variable resistance element included in said chamber not included in said closed pneumatic means, and a bridge having output and voltage energizing input nodes, said bridge circuit including said first and second variable resistance elements in differing branches thereof.
Claim 9
Dependent Claim
207 words
In combination in a sphygmomanometer for automatically determining a subject''s blood pressure, an occluding cuff, a detecting cuff adapted for use distal to said occluding cuff, closed detecting pneumatic means connected to said detecting cuff, means for selectively inflating and deflating said occluding and detecting cuffs, detecting transducer means included in said closed pneumatic system, pressure transducer means for detecting the pressure in said occluding cuff, systolic pressure indicating means, first circuit means for selectively connecting said pressure transducer means to said systolic pressure indicating means, second circuit means connected to said detecting transducer means for selectively isolating said systolic pressure indicating means from said pressure transducer means, said detecting transducer means including a first temperature responsive, variable resiStance element, means having two substantially identical chambers therein, one of said chambers being included in said detecting pneumatic means and the other of said chambers not being so included, said first variable resistance element being included in said chamber included in said closed pneumatic means, a second temperature responsive, variable resistance element included in said chamber not included in said closed pneumatic means, and a bridge having output and voltage energizing input nodes, said bridge circuit including said first and second variable resistance elements in differing branches thereof.
Claim 10
Dependent Claim
31 words
A combination as in claim 16 further comprising feedback amplifier means having an input connected to said bridge output nodes and an output connected to said bridge voltage energization input nodes.
Claim 11
Dependent Claim
17 words
A combination as in claim 6 further comprising a logarithmic amplifier connected to said bridge output nodes.
Claim 12
Dependent Claim
226 words
In combination in a sphygmomanometer, inflatable cuff means for selectively occluding a subject''s artery, and for detecting blood pulses flowing in said artery, systolic pressure-indicating means, means for sensing the occluding pressure in said inflatable cuff means, gated means for connecting said pressure sensing means with said systolic pressure-indicating means, and means connected to said cuff means responsive to said cuff means detecting two blood pulses occurring within a predetermined time interval of each other, with said second pulse being greater than said first pulse, for signaling said gated means, said gating means including means responsive to said signal from said signaling means for isolating said systolic pressure indicating means from said pressure sensing means, said gated means provisionally isolating said systolic pressure indicating means responsive to the incidence of a first pulse from said signaling means, further comprising diastolic pressure-indicating means, additional gated means for connecting said pressure-sensing means with said diastolic pressure indicating means, and means connected to said cuff means and responsive to the incidence of a pulse detected by said cuff means having an amplitude a predetermined proportional amount less than the largest of all previous pulses detected by said cuff means for signaling said additional gated means, said additional gated means responsive to said signal from said diastolic signaling means for isolating said diastolic pressure indicating means from said pressure-sensing means.
Claim 13
Dependent Claim
226 words
In combination in a sphygmomanometer, inflatable cuff means for selectively occluding a subject''s artery, and for detecting blood pulses flowing in said artery, systolic pressure-indicating means, means for sensing the occluding pressure in said inflatable cuff means, gated means for connecting said pressure sensing means with said systolic pressure-indicating means, and means connected to said cuff means responsive to said cuff means detecting two blood pulses occurring within a predetermined time interval of each other, with said second pulse being greater than said first pulse, for signaling said gated means, said gating means including means responsive to said signal from said signaling means for isolating said systolic pressure indicating means from said pressure sensing means, said gated means provisionally isolating said systolic pressure indicating means responsive to the incidence of a first pulse from said signaling means, further comprising diastolic pressure-indicating means, additional gated means for connecting said pressure-sensing means with said diastolic pressure indicating means, and means connected to said cuff means and responsive to the incidence of a pulse detected by said cuff means having an amplitude a predetermined proportional amount less than the largest of all previous pulses detected by said cuff means for signaling said additional gated means, said additional gated means responsive to said signal from said diastolic signaling means for isolating said diastolic pressure indicating means from said pressure-sensing means.
Claim 14
Dependent Claim
13 words
A combination as in claim 9 wherein said proportional amount is approximately 0.7.
Claim 15
Dependent Claim
150 words
In combination in a sphygmomanometer, inflatable cuff means for selectively occluding a subject''s artery and for detecting blood pulses flowing in said artery, diastolic pressure indicating means, means for sensing the occluding pressure indicating in said inflatable cuff means, gated means for selectively connecting said pressure sensing means with said diastolic pressure indicating means, peak-detecting means for storing a scaled replica of the amplitude of the largest pulse signal sensed by said cuff-detecting means in a monitoring cycle of operation, means for storing the amplitude of each pulse produced by said detecting means and means responsive to the peak amplitude stored in said last pulse amplitude storing means being a predetermined amount less than the output of said peak-detecting means for signaling said gated means, said gated means including means responsive to said signal from said signaling means for isolating said diastolic pressure indicating means from said pressure sensing means.
Claim 16
Dependent Claim
150 words
In combination in a sphygmomanometer, inflatable cuff means for selectively occluding a subject''s artery and for detecting blood pulses flowing in said artery, diastolic pressure indicating means, means for sensing the occluding pressure indicating in said inflatable cuff means, gated means for selectively connecting said pressure sensing means with said diastolic pressure indicating means, peak-detecting means for storing a scaled replica of the amplitude of the largest pulse signal sensed by said cuff-detecting means in a monitoring cycle of operation, means for storing the amplitude of each pulse produced by said detecting means and means responsive to the peak amplitude stored in said last pulse amplitude storing means being a predetermined amount less than the output of said peak-detecting means for signaling said gated means, said gated means including means responsive to said signal from said signaling means for isolating said diastolic pressure indicating means from said pressure sensing means.
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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) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |