Dual-level combustion chamber system, for fastener driving tool, having dual-level rotary valve mechanism incorporated therein
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F01L-007/00
F02B-071/00
출원번호
US-0149321
(2008-04-30)
등록번호
US-8087394
(2012-01-03)
발명자
/ 주소
Adams, Joseph S.
출원인 / 주소
Illinois Tool Works Inc.
대리인 / 주소
Law Offices of Steven W. Weinrieb
인용정보
피인용 횟수 :
2인용 특허 :
17
초록▼
A combustion chamber system, for use in connection with internal combustion powered fastener-driving tools, comprises a dual-level combustion chamber comprising first and second pre-combustion and main combustion chambers, and a dual-level rotary valve mechanism which is operatively connected to the
A combustion chamber system, for use in connection with internal combustion powered fastener-driving tools, comprises a dual-level combustion chamber comprising first and second pre-combustion and main combustion chambers, and a dual-level rotary valve mechanism which is operatively connected to the dual-level combustion chamber so as to control the intake of the air/fuel mixture as well as the scavenging or purging of the exhaust gases or combustion products. The first and second pre-combustion and main combustion chambers are also separated by a plate having a plurality of apertures defined therein whereby multiple jets or flame fronts are defined throughout the combustion chamber system.
대표청구항▼
1. A dual-level combustion chamber system, comprising: a dual-level combustion chamber comprising first and second vertically-stacked combustion chambers; anda dual-level, two position valve operatively associated with said dual-level combustion chamber for controlling the ingress of an air/fuel mix
1. A dual-level combustion chamber system, comprising: a dual-level combustion chamber comprising first and second vertically-stacked combustion chambers; anda dual-level, two position valve operatively associated with said dual-level combustion chamber for controlling the ingress of an air/fuel mixture into said first and second combustion chambers and the egress of combustion products out from said first and second combustion chambers;wherein said dual-level valve comprises a single dual-level, two position rotary valve rotatably mounted upon said dual-level combustion chamber for movement between first OPENED and second CLOSED positions, a vertical partition, a semi-circular horizontally oriented plate disposed upon one side of said vertical partition so as to define and fluidically separate an inlet port, for permitting the ingress of the air/fuel mixture into said first combustion chamber, from an outlet port for permitting the egress of the combustion products out from said second combustion chamber, while an opposite side of said vertical partition defines a vertically oriented fluid passageway fluidically connecting said first and second combustion chambers,whereby when said dual-level rotary valve is disposed at said first OPENED position, an air/fuel mixture can enter said inlet port, traverse said first combustion chamber, traverse said vertically oriented fluid passageway, traverse said second combustion chamber, and exit said second combustion chamber through said outlet port so as to scavenge combustion products from said combustion chamber system which were generated during a combustion cycle, whereas when said dual-level rotary valve is disposed at said second CLOSED position, an air/fuel mixture is trapped within said first and second combustion chambers so as to be ready for a combustion cycle. 2. The dual-level combustion chamber system as set forth in claim 1, wherein: said first and second combustion chambers comprise first pre-combustion and second main combustion chambers. 3. The dual-level combustion chamber system as set forth in claim 2, further comprising: an ignition device disposed within said first pre-combustion chamber for initiating ignition within said first pre-combustion chamber. 4. The dual-level combustion chamber system as set forth in claim 3, further comprising: a plate interposed between and separating said first pre-combustion chamber from said second main combustion chamber; anda plurality of apertures defined within said plate for defining a plurality of flame fronts for initiating combustion of the air/fuel mixture at a plurality of locations within said second main combustion chamber after said ignition device has initiated combustion of the air/fuel mixture within said first pre-combustion chamber. 5. The dual-level combustion chamber system as set forth in claim 1, further comprising: a vertically extending cylindrical column is disposed within said dual-level combustion chamber such that flow paths are defined within said first and second combustion chambers, along which the air/fuel mixture flows throughout said first and second combustion chambers, so as to have substantially annular configurations. 6. The dual-level combustion chamber system as set forth in claim 1, further comprising: a vertically extending tubular column, open at one circumferential portion thereof, is disposed within said dual-level combustion chamber; anda vertically extending, radially inwardly projecting wall member is also disposed within said dual-level combustion chamber adjacent to said open portion of said vertically extending tubular column such that flow paths are defined within said first and second combustion chambers, along which the air/fuel mixture flows throughout said first and second combustion chambers, so as to have substantially sinusoidal configurations. 7. The dual-level combustion chamber system as set forth in claim 6, wherein: a radially innermost portion of said vertically extending, radially inwardly projecting wall member projects into said open circumferential portion of said vertically extending tubular column so as to fluidically cooperate with said vertically extending tubular column in defining said sinusoidal flow paths of the air/fuel mixture through said first and second combustion chambers. 8. A dual-level combustion chamber system comprising: a dual-level combustion chamber comprising first and second vertically-stacked combustion chambers; anda dual-level, two position valve operatively associated with said dual-level combustion chamber for controlling the ingress of an air/fuel mixture into said first and second combustion chambers and the egress of combustion products out from said first and second combustion chambers;wherein said dual-level valve comprises a single dual-level, two position rotary valve rotatably mounted upon said dual-level combustion chamber for movement between first OPENED and second CLOSED positions, a vertical partition, a circular horizontally oriented plate mounted upon said vertical partition so as to be disposed upon both sides of said vertical partition and thereby define and fluidically separate a pair of inlet ports, for permitting the ingress of the air/fuel mixture into both of said first and second combustion chambers, from a pair of outlet ports for permitting the egress of the combustion products out from both of said first and second combustion chambers,whereby when said dual-level rotary valve is disposed at said first OPENED position, an air/fuel mixture can enter both of said inlet ports, traverse both of said first and second combustion chambers, and exit said first and second combustion chambers through said outlet ports so as to scavenge combustion products from said first and second combustion chamber system which were generated during a combustion cycle, whereas when said dual-level rotary valve is disposed at said second CLOSED position, an air/fuel mixture is trapped within said first and second combustion chambers so as to be ready for a combustion cycle. 9. The dual-level combustion chamber system as set forth in claim 8, wherein: said ingress of the air/fuel mixture into both of said first and second combustion chambers, and the egress of the combustion products out from both of said first and second combustion chambers, is performed individually. 10. The dual-level combustion chamber system as set forth in claim 8, wherein: said ingress of the air/fuel mixture into both of said first and second combustion chambers, and the egress of the combustion products out from both of said first and second combustion chambers, is performed independently. 11. The dual-level combustion chamber system as set forth in claim 8, wherein: the ingress of the air/fuel mixture into both of said first and second combustion chambers, and the egress of the combustion products out from both of said first and second combustion chambers, is performed simultaneously. 12. A combustion-powered fastener-driving tool, comprising: a power piston movable through a power stroke from a START position;a driver blade fixedly mounted upon said power piston for driving a fastener out from said combustion-powered fastener-driving tool;a dual-level combustion chamber, comprising first and second vertically stacked combustion chambers, operatively associated with said power piston for driving said power piston during a combustion cycle; anda dual-level, two-position valve operatively associated with said dual-level combustion chamber for controlling the ingress of an air/fuel mixture into said first and second combustion chambers and the egress of combustion products out from said first and second combustion chambers;wherein said dual-level valve comprises a single dual-level, two-position rotary valve rotatably mounted upon said dual-level combustion chamber for movement between first OPENED and second CLOSED positions, a vertical partition, a semi-circular horizontally oriented plate disposed upon one side of said vertical partition so as to define and fluidically separate an inlet port, for permitting the ingress of the air/fuel mixture in-to said first combustion chamber, from an outlet port for permitting the egress of the combustion products out from said second combustion chambers, while an opposite side of said vertical partition defines a vertically oriented fluid passageway fluidically connecting said first and second combustion chambers,whereby when said dual-level rotary valve is disposed at said first OPENED position, an air/fuel mixture can enter said inlet port, traverse said first combustion chamber, traverse said vertically oriented fluid passageway, traverse said second combustion chamber, and exit said second combustion chamber through said outlet port so as to scavenge combustion products from said combustion chamber system which were generated during a combustion cycle, whereas when said dual-level rotary valve is disposed at said second CLOSED position, an air/fuel mixture is trapped within said first and second combustion chambers so as to be ready for a combustion cycle. 13. The combustion-powered fastener-driving tool as set forth in claim 12, further comprising: a magnetic device is disposed within one of said first and second combustion chambers for retaining said power piston at said START position prior to the commencement of a combustion power operational cycle. 14. A dual-level valve mechanism for use in connection with a dual-level combustion chamber system, comprising: a dual-level combustion chamber comprising first and second vertically stacked combustion chambers; anda dual-level two-position valve operatively associated with said dual-level combustion chamber for controlling the ingress of an air/fuel mixture into said first and second combustion chambers and the egress of combustion products out from said first and second combustion chambers;wherein said dual-level valve comprises a single dual-level, two position rotary valve rotatably mounted upon said dual-level combustion chamber for movement between first OPENED and second CLOSED positions, a vertical partition, a semi-circular horizontally oriented plate disposed upon one side of said vertical partition so as to define and fluidically separate an inlet port, for permitting the ingress of the air/fuel mixture into said first combustion chamber, from an outlet port for permitting the egress of the combustion products out from said second combustion chamber, while an opposite side of said vertical partition defines a vertically oriented fluid passageway fluidically connecting said first and second combustion chambers,whereby when said dual-level rotary valve is disposed at said first OPENED position, an air/fuel mixture can enter said inlet port, traverse said first combustion chamber, traverse said vertically oriented fluid passageway, traverse said second combustion chamber, and exit said second combustion chamber through said outlet port so as to scavenge combustion products from said combustion chamber system which were generated during a combustion cycle, whereas when said dual-level rotary valve is disposed at said second CLOSED position, an air/fuel mixture is trapped within said first and second combustion chambers so as to be ready for a combustion cycle. 15. A dual-level valve mechanism for use in connection with a dual-level combustion chamber system, comprising: a dual-level combustion chamber comprising first and second vertically-stacked combustion chambers; anda dual-level, two position valve operatively associated with said dual-level combustion chamber for controlling the ingress of an air/fuel mixture into said first and second combustion chambers and the egress of combustion products out from said first and second combustion chambers;wherein said dual-level valve comprises a single dual-level, two position rotary valve rotatably mounted upon said dual-level combustion chamber for movement between first OPENED and second CLOSED positions, a vertical partition, a circular horizontally oriented plate mounted upon said vertical partition so as to be disposed upon both sides of said vertical partition and thereby define and fluidically separate a pair of inlet ports, for permitting the ingress of the air/fuel mixture into both of said first and second combustion chambers, from a pair of outlet ports for permitting the egress of the combustion products out from both of said first and second combustion chambers,whereby when said dual-level rotary valve is disposed at said first OPENED position, an air/fuel mixture can enter both of said inlet ports, traverse both of said first and second combustion chambers, and exit said first and second combustion chambers through said outlet ports so as to scavenge combustion products from said first and second combustion chamber system which were generated during a combustion cycle, whereas when said dual-level rotary valve is disposed at said second CLOSED position, an air/fuel mixture is trapped within said first and second combustion chambers so as to be ready for a combustion cycle. 16. The dual-level valve mechanism as set forth in claim 15, wherein: said ingress of the air/fuel mixture into both of said first and second combustion chambers, and the egress of the combustion products out from both of said first and second combustion chambers, is performed simultaneously. 17. The dual-level valve mechanism as set forth in claim 15, wherein: said ingress of the air/fuel mixture into both of said first and second combustion chambers, and the egress of the combustion products out from both of said first and second combustion chambers, is performed individually. 18. The dual-level valve mechanism as set forth in claim 15, wherein: said ingress of the air/fuel mixture into both of said first and second combustion chambers, and the egress of the combustion products out from both of said first and second combustion chambers, is performed independently.
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