[특허]Ventilatory capacity meters

[미국특허] Ventilatory capacity meters 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	A61B-005/08
출원번호	US-0964579 (2001-09-28)
우선권정보	GB-20000025679 (2000-10-19)
발명자 / 주소	Spencer, David William
출원인 / 주소	Clement Clarke International Ltd.
대리인 / 주소	Jones, Tullar & Cooper, P.C.
인용정보	피인용 횟수 : 32 인용 특허 : 3

초록 ▼

In a meter for assessing ventilatory capacity, a piston is free of any sliding contact with the body of the meter except over a region which extends axially not less than about 25% of the piston's diameter. In this way, tilting of the piston is avoided. Sliding contact is further reduced by the pist

대표청구항 ▼

1. A meter for measuring the ventilatory capacity of a subject, the meter having: a chamber formed by a wall with an axial direction defined by an inner surface of said wall, said chamber having an exit slot in said wall; a piston within said chamber being displaceable axially against a resilient bias by blowing air into said chamber, and means for recording a maximum displacement of said piston, said piston having a transverse dimension perpendicular to said axial direction, said exit slot being adapted for the escape of the air from said chamber as said slot is increasingly opened by the displacement of said piston against said bias, there being a bounded region of a sliding contact between said piston and said inner surface of said wall of at any one position of said piston, said bounded region being separated axially by a distance not less than about 25% of the transverse dimension of said piston, said sliding contact guiding displacement of said piston and preventing tilting of said piston. 2. A meter according to claim 1, wherein said distance is not less than about 30% of the transverse dimension of said piston. 3. A meter according to claim 1, wherein said piston is free of other sliding contact during its displacement. 4. A meter according to claim 3, wherein said bounds are respective support rims of said piston. 5. A meter according to claim 2, wherein said piston makes peripherally at least partly discontinuous contact with said inner surface of said wall. 6. A meter according to claim 5, wherein said piston has axially extending, peripherally spaced-apart, ribs for making sliding contact with said inner surface of said wall. 7. A meter according to claim 6, wherein said piston additionally has a peripherally continuous lip at one axial end for making contact with said inner surface of said wall. 8. A meter according to claim 5, wherein said piston makes only peripherally discontinuous contact with said inner surface of said wall over the whole of its axial length. 9. A meter according to claim 8, wherein contact between said piston and said inner surface of said wall is provided by axially-extending, inward projections of said inner surface of said wall. 10. A meter for measuring the ventilatory capacity of a subject, the meter having: a chamber formed by a wall with an axial direction defined by an inner surface of said wall, said chamber having a exit slot in said wall; a piston within said chamber being displaceable axially against a resilient bias by blowing air into said chamber, and means for recording a maximum displacement of said piston, said piston having a transverse dimension perpendicular to said axial direction, said exit slot being adapted for the escape of the air from said chamber as said slot is increasingly opened by the displacement of said piston against said bias, wherein sliding contact between said piston and said inner surface of said wall being at any one time at least at positions spaced axially apart by not less than about 25% of the transverse dimension of said piston, said sliding contact guiding displacement of said piston and preventing tilting of said piston. 11. A meter according to claim 10, wherein said piston is guided in said chamber only by said sliding contact with said inner surface of said wall.

이 특허에 인용된 특허 (3) 인용/피인용 타임라인 분석

Byerley Stephen William (Harlow GB2), Peak flow meter for measuring ventilatory capacity.
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Bhm Jrgen (Mannheim-Wallstadt OK DEX) Schad Charles A. (Tulsa OK), Testing device for flow meters.
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Wright Basil Martin (Rickmansworth EN), Ventilatory capacity measuring instrument.
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이 특허를 인용한 특허 (32) 인용/피인용 타임라인 분석

Noble, Scott; Garcia, Edward; Polyakov, Evgeny; Truebenbach, Eric L.; Merrow, Brian S., Bulk feeding disk drives to disk drive testing systems.
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Noble, Scott; Garcia, Edward; Polyakov, Evgeny; Truebenbach, Eric L.; Merrow, Brian S., Bulk feeding disk drives to disk drive testing systems.
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Truebenbach, Eric L., Bulk transfer of storage devices using manual loading.
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Truebenbach, Eric L., Bulk transfer of storage devices using manual loading.
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Martino, Peter, Damping vibrations within storage device testing systems.
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Merrow, Brian S.; Truebenbach, Eric L.; Smith, Marc Lesueur, Dependent temperature control within disk drive testing systems.
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Merrow, Brian S.; Garcia, Edward; Polyakov, Evgeny, Disk drive transport, clamping and testing.
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Merrow, Brian S.; Garcia, Edward; Polyakov, Evgeny, Disk drive transport, clamping and testing.
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Merrow, Brian S.; Garcia, Edward; Polyakov, Evgeny, Disk drive transport, clamping and testing.
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Arena, John Joseph; Suto, Anthony J., Electronic assembly test system.
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Merrow, Brian S., Enclosed operating area for disk drive testing systems.
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Merrow, Brian S., Enclosed operating area for storage device testing systems.
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Campbell, Philip; Wrinn, Joseph F., Engaging test slots.
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Merrow, Brian S.; Akers, Larry W., Heating storage devices in a testing system.
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Cha,Eun Jong; Kim,Kyung Ah, Peak expiratory flow meter capable of measuring continuous expiratory flow signal.
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Merrow, Brian S.; Akers, Larry W., Storage device temperature sensing.
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Merrow, Brian S.; Akers, Larry W., Storage device temperature sensing.
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Merrow, Brian S., Storage device testing system cooling.
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Merrow, Brian S., Storage device testing system cooling.
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Merrow, Brian S.; Akers, Larry W., Storage device testing system with a conductive heating assembly.
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Merrow, Brian S., Temperature control within disk drive testing systems.
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Merrow, Brian S., Temperature control within disk drive testing systems.
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Merrow, Brian S., Temperature control within storage device testing systems.
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Merrow, Brian S.; Krikorian, Nicholas C., Test slot cooling system for a storage device testing system.
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Merrow, Brian S.; Krikorian, Nicholas C., Test slot cooling system for a storage device testing system.
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Merrow, Brian S., Thermal control system for test slot of test rack for disk drive testing system with thermoelectric device and a cooling conduit.
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Polyakov, Evgeny; Garcia, Edward; Truebenbach, Eric L.; Merrow, Brian S.; Whitaker, Brian J., Transferring disk drives within disk drive testing systems.
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Polyakov, Evgeny; Garcia, Edward; Truebenbach, Eric L.; Merrow, Brian S.; Whitaker, Brian J., Transferring disk drives within disk drive testing systems.
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Polyakov, Evgeny; Garcia, Edward; Truebenbach, Eric L.; Merrow, Brian S.; Whitaker, Brian J., Transferring storage devices within storage device testing systems.
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Toscano, John; Polyakov, Evgeny; Garcia, Edward; Truebenbach, Eric L.; Merrow, Brian S.; Whitaker, Brian J., Transferring storage devices within storage device testing systems.
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Toscano, John; Polyakov, Evgeny; Garcia, Edward; Truebenbach, Eric L.; Merrow, Brian S.; Whitaker, Brian J., Transferring storage devices within storage device testing systems.
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Merrow, Brian S., Vibration isolation within disk drive testing systems.
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A	생활필수품
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[미국특허] Ventilatory capacity meters 원문보기