[특허]Enhanced chest compressor

Enhanced chest compressor 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	A61H-031/00
출원번호	US-0444784 (2014-07-28)
등록번호	US-9913776 (2018-03-13)
발명자 / 주소	Tang, Wanchun Weil, Max Harry Bisera, Joe Castillo, Carlos
출원인 / 주소	SUNLIFE SCIENCE INC.
대리인 / 주소	Cohen, Lawrence S.
인용정보	피인용 횟수 : 0 인용 특허 : 38

초록 ▼

A chest compressor includes a piston (14) that moves in downward and upward strokes within a cylinder (12), with the piston undergoing a smooth reversal at the bottom of the downward stroke. A compression spring, such as a wave spring (60), is positioned to engage the piston only near the end of its downward stroke, to smoothly reverse the piston motion, limit downward force on the patient at the end of the stroke, and avoid a downward pulse due to the momentum of the downwardly-moving piston. A stop (90, 92) is latchable in an inward position to allow reduction in the piston stroke by engaging an outward flange (52) on the piston before the piston has moved fully downward. In one embodiment the piston (14) is made as an outer piston part (40) and an inner piston part (42) that telescope in one another in which the outer piston part is slidably engaged with and guided by the cylinder along a path and the inner piston part is slidably engaged with and guided by the outer piston part and the spring (60) engages the inner piston part near the end of its downward stroke, to smoothly reverse the piston motion, limit downward force on the patient at the end of the stroke, and avoid a downward pulse due to the momentum of the downwardly-moving piston.

대표청구항 ▼

1. A chest compressor for use by an emergency worker for applying compressions to the chest of a patient to enhance breathing and blood circulation, including: a cylinder (12);a piston (14) that is actuatable to move in the cylinder in a downstroke toward the patient and in an upstroke away from the patient;said piston includes an outer piston part (40) and an inner piston part (42) that are engaged in a telescopic manner with one another with said outer piston part slidably engaged with and guided by said cylinder along a path and said inner piston part slidably engaged with and guided by said outer piston part; and,a spring (60) that engages said inner piston part to slow its downward movement and reduce its downward force only when said piston has completed at least two-thirds of its downstroke and helping to reverse piston movement to begin the upstroke. 2. The chest compressor described in claim 1, further including: said inner piston part having an outward top flange (56);said outer piston part having an inward bottom flange (54) lying below said inner piston part outward top flange; and,said spring is a wave spring that lies between said inner piston part outward top flange and said outer piston part inward bottom flange;wherein said spring is compressed near the end of the piston downstroke. 3. The chest compressor described in claim 2, further including: a stop (90) that is moveable from a nonlimiting location to a limiting location that lies in the path of said outer piston part, with the stop being latchable in said limiting location to reduce the length of downstroke movement of the outer piston part along each downstroke. 4. The chest compressor described in claim 3, further including: said outer piston part having an axis (44) and an outwardly extending flange (52);said stop comprises a pin (94) that is moveable radially inward toward said axis to said limiting location wherein said pin lies in the path of said outer piston part outwardly extending flange;said pin being moveable outward to said nonlimiting location; and,said stop including a double click mechanism that latches said pin in said limiting location and releases said pin to said nonlimiting location. 5. The chest compressor described in claim 1 wherein: said spring is a compression spring. 6. The chest compressor described in claim 5 wherein: said compression spring slows and reverses movement of the piston along a height (H) of at least 20 millimeters; and, said compression spring being the only spring that applies a force to said piston. 7. The chest compressor described in claim 5 wherein: said compression spring is a wave spring. 8. The chest compressor described in claim 7 wherein: said wave spring has opposite sides, a horizontal width measured between said opposite sides, and a vertical height less than said horizontal width. 9. The chest compressor described in claim 5, further including: an adhesive between said compression spring and said outer piston part bottom flange holding said compression spring on said outer piston part bottom flange. 10. The chest compressor described in claim 5, further including: a hold down adjacent said outer piston part bottom flange holding said compression spring on said outer piston part bottom flange. 11. A method for repeatedly compressing the chest of a patient to stimulate blood circulation and breathing, the chest having resilience, comprising: (a) providing a chest compressor for applying a single or a plurality of repeated compressions to said chest of said patient comprising: a cylinder (12);a piston (14) that is actuatable to move in the cylinder in a downstroke toward said patient to cause chest compression and in an upstroke away from said patient to allow chest resilience;said piston comprising an outer piston part (40) and an inner piston part (42) that are engaged in a telescopic manner with one another with said outer piston part slidably engaged with and guided by said cylinder and said inner piston part slidably engaged with and guided by said outer piston part for the downstroke and the upstroke; and,a spring (60) that engages said inner piston part to slow its downward movement in the downstroke and reduce its downward force only when said inner piston part has completed at least two-thirds of its downstroke and helping to reverse piston movement to begin the upstroke;(b) mounting said chest compressor on said chest of said patient;(c) providing a compressed fluid and a control;(d) repeatedly moving said piston from an upward position to a downward position against said chest of said patient by causing the compressed fluid to apply pressure to the piston to cause the downstroke and to allow the upstroke by releasing the pressure;(e) said spring slowing the downward movement of said piston against said chest after said piston has completed at least two-thirds of its downstroke. 12. The method of claim 11, further including: in further providing a stop (90) that is moveable from a nonlimiting location to a limiting location that lies in a path of said outer piston part to shorten its stroke; and,moving said stop to said limiting location to reduce the length of the downstroke movement of said outer piston part along each downstroke.

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Barkalow Clare E. (Comstock Park MI), Cardiopulmonary resuscitator massager pad.
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Barkalow Clare E. (Comstock Park MI), Cardiopulmonary resuscitator massager pad.
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Kelly Kevin A. ; Lach Thomas E. ; Lach Ralph D. ; Handshy Arthur W., Chest compression apparatus for cardiac arrest.
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Weil,Max Harry; Bisera,Joe; Young,Clayton; Tang,Wanchun, Chest compressor.
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Escudero, Paul Q.; Hall, Gregory W., Compression belt system for use with chest compression devices.
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Tang, Wanchun; Castillo, Carlos; Weil, Max Harry; Bisera, Joe, Low profile chest compressor.
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