Gas spring for actuator
원문보기
IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0308448
(1989-02-10)
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우선권정보 |
NL-0000340 (1988-02-11) |
발명자
/ 주소 |
- Janssen Hendrikus C. J. G. (Hengelo NLX) Tiehuis Joseph H. M. (Delden NLX)
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출원인 / 주소 |
- Holland Hellas Holding B.V. (NLX 03)
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인용정보 |
피인용 횟수 :
2 인용 특허 :
9 |
초록
▼
The invention relates to an actuator, comprising: a cylinder, one or two pistons reciprocally movable in that cylinder one or two racks, each carried by a piston, a pinion coupled to the rack(s), an output connecting part coupled to that pinion for connecting to a device for driving, such as a butte
The invention relates to an actuator, comprising: a cylinder, one or two pistons reciprocally movable in that cylinder one or two racks, each carried by a piston, a pinion coupled to the rack(s), an output connecting part coupled to that pinion for connecting to a device for driving, such as a butterfly valve, means for connecting to a line for medium under pressure for causing the pistons simultaneously to move towards or move away from one another, thereby causing the execution of a corresponding pivoting movement of the output connecting part, and resetting spring means for forcing the pistons into a terminal rest position. The invention provides an actuator with the feature that the resetting spring means comprise at least one gas spring which is connected between the cylinder and a piston. The advantage of the use of a gas spring is that within relatively precise limits it delivers a constant force over a very wide area, also therefore at the end of its stroke, whereby a reliable closure of a driven valve is better assured than is the case with the use of known screw springs. A gas spring also has the advantage of being obtainable in many embodiments after relatively simple adaptations with a view to connection to a known actuator and moreover of being easy to change from outside by a simple manual operation.
대표청구항
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Actuator, comprising: a cylinder, two pistons reciprocally movable in the cylinder, two racks, each carried by a respective piston, a pinion coupled to the racks, the racks diametrically opposed to each other relative to the pinion, an output connecting part coupled to the pinion for connecting a de
Actuator, comprising: a cylinder, two pistons reciprocally movable in the cylinder, two racks, each carried by a respective piston, a pinion coupled to the racks, the racks diametrically opposed to each other relative to the pinion, an output connecting part coupled to the pinion for connecting a device for driving thereto, means for communicating a medium under pressure to the pistons for causing the pistons simultaneously to move away from or move towards one another, thereby causing the performing of a corresponding pivoting movement of said output connecting part, and resetting spring means for forcing said pistons to a terminal rest position, wherein said resetting spring means comprises at least one gas spring which is connected to each piston, wherein the gas spring is filled partly with gas under pressure and partly with a non-compressible medium, such as oil, so that the piston performs a slowed movement at the end of its stroke directed towards the rest position of the gas spring.
이 특허에 인용된 특허 (9)
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Wittwer Christoph F. (Cincinnati OH) Suica David E. (Cincinnati OH), Counterbalance assembly for rotatable robotic arm and the like.
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Reiersdal ; Olav L., Device for a hydraulically driven percussion hammer.
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Hilpert Bruno (Diessenhofen CHX) Hunziker Bruno (Schaffhausen CHX), Remote control actuating device for a valve.
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Fender, Norman N.; Davis, Mark S., Robot spray head.
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Kreuter Paul E. (Thief River Falls MN) Odegaard Larry G. (Thief River Falls MN), Rotary actuator.
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Lew Yon S. (7890 Oak St. Arvada CO 80005), Super reliable air-spring return air cylinder.
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Duffey Donn W. (Pittsburgh PA), Valve actuator.
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Kaji Shoichi (Yamanashi JPX), Valve driving apparatus.
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Stephan Robert W. (Northville MI), Variable displacement vane pump with vanes contacting relatively rotatable rings.
이 특허를 인용한 특허 (2)
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Eschborn, David M.; Lane, Glenn H.; Gaines, Louie T.; Langston, Todd, Low profile valve actuator having high torque output.
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Szatmary Michael A. (8925 Admirals Pointe Dr. Indianapolis IN 46236), Sealed bonnet for actuating a quarter turn valve assembly.
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