Two stage gas pilot valve controlling gas flow to a reaction jet nozzle
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F02K-009/52
F02K-009/80
F02K-009/68
출원번호
US-0195792
(1998-11-19)
발명자
/ 주소
Abel, Stephen G.
Christensen, Donald J.
출원인 / 주소
Honeywell International, Inc.
대리인 / 주소
Newburry, Esq., Keith A.
인용정보
피인용 횟수 :
8인용 특허 :
4
초록▼
A multi-stage pilot valve is disclosed for selectively supplying a working fluid to and venting from a reaction jet main stage actuation chamber. In a preferred embodiment of the invention, the pilot valve comprises a solenoid actuated ball and socket flapper valve having a pressure inlet, an exhaus
A multi-stage pilot valve is disclosed for selectively supplying a working fluid to and venting from a reaction jet main stage actuation chamber. In a preferred embodiment of the invention, the pilot valve comprises a solenoid actuated ball and socket flapper valve having a pressure inlet, an exhaust outlet and a service port. The first stage service port is in fluid communication with a second stage actuation chamber. A piston disposed in the second stage actuation chamber operatively engages a ball member of a ball-and-seat type valve comprising the second stage valve. The second stage valve also comprises a pressure inlet, an exhaust outlet and a service port. The piston and ball are sized relative to each other such that when the second stage actuation chamber is pressurized by the first stage, the force is sufficient to seat the ball against the second stage pressure inlet. This shuts off the flow of high pressure gases to the second stage service port and permits the second stage service port to vent through the exhaust port. When the second stage actuation chamber is vented by the first stage valve, the pressure acting on the ball is sufficient to seat the ball against the second stage exhaust outlet. This opens the second stage pressure inlet to permit high pressure gases to enter the second stage service port. The bi-directional movement of the ball member of the second stage valve is accomplished entirely by fluid pressure, thus enabling a fast responding, high flow rate regulation of the hot gases using low electrical power and eliminating the use of springs or other resilient members that would be of dubious reliability operating in a hot gas environment.
대표청구항▼
A multi-stage pilot valve is disclosed for selectively supplying a working fluid to and venting from a reaction jet main stage actuation chamber. In a preferred embodiment of the invention, the pilot valve comprises a solenoid actuated ball and socket flapper valve having a pressure inlet, an exhaus
A multi-stage pilot valve is disclosed for selectively supplying a working fluid to and venting from a reaction jet main stage actuation chamber. In a preferred embodiment of the invention, the pilot valve comprises a solenoid actuated ball and socket flapper valve having a pressure inlet, an exhaust outlet and a service port. The first stage service port is in fluid communication with a second stage actuation chamber. A piston disposed in the second stage actuation chamber operatively engages a ball member of a ball-and-seat type valve comprising the second stage valve. The second stage valve also comprises a pressure inlet, an exhaust outlet and a service port. The piston and ball are sized relative to each other such that when the second stage actuation chamber is pressurized by the first stage, the force is sufficient to seat the ball against the second stage pressure inlet. This shuts off the flow of high pressure gases to the second stage service port and permits the second stage service port to vent through the exhaust port. When the second stage actuation chamber is vented by the first stage valve, the pressure acting on the ball is sufficient to seat the ball against the second stage exhaust outlet. This opens the second stage pressure inlet to permit high pressure gases to enter the second stage service port. The bi-directional movement of the ball member of the second stage valve is accomplished entirely by fluid pressure, thus enabling a fast responding, high flow rate regulation of the hot gases using low electrical power and eliminating the use of springs or other resilient members that would be of dubious reliability operating in a hot gas environment. wherein: said plurality of actuator mechanisms are mounted upon said first outer framework so as to be separately connected to each one of said movable framework members such that each one of said movable framework members is independently movable relative to all of the other ones of said plurality of framework members. 5. The system as set forth in claim 4, wherein: each one of a pair of said plurality of actuator mechanisms is operatively connected to an opposite end of each one of said movable framework members. 6. The system as set forth in claim 2, wherein: each one of said plurality of framework members has a pair of spaced vertically oriented post means fixedly mounted thereon for engaging spaced regions of the outwardly projecting edge portions of the slip sheets so as to facilitate the downward folding of the outwardly projecting edge portions of the slip sheets. 7. The system as set forth in claim 3, further comprising: sensor means disposed upon said plurality of vertically oriented post means for sensing the positional presence of the outwardly projecting edge portions of the slip sheets. 8. The system as set forth in claim 7, further comprising: a central processing unit (CPU), operatively connected to said sensor means and said plurality of actuator mechanisms, for receiving first signals from said sensor means respectively indicating the positional presence of the outwardly projecting edge portions of the slip sheets, and for generating second signals to said plurality of actuator mechanisms for respectively terminating movement of said plurality of movable framework members so as to properly position said vertically oriented post means with respect to the outwardly projecting edge portions of the slip sheets. 9. The system as set forth in claim 7, wherein: said sensor means disposed upon said plurality of vertically oriented post means are disposed within housing portions located upon lowermost end portions of said plurality of vertically oriented post means. 10. The system as set forth in claim 9, wherein: each one of said sensor housing portions is externally coated with polytetrafluoroethylene so as to facilitate the release of said sensor housing portions from the plastic film wrapping material as the plastic film wrapping material secures the downwardly folded edge portions of the slip sheets in their downwardly forwardly states as a result of a film wrapping operation. 11. The system as set forth in claim 4, further comprising: sensor means disposed upon said plurality of vertically oriented post means for sensing the positional presence of the outwardly projecting edge portions of the slip sheets. 12. The system as set forth in claim 11, further comprising: a central processing unit (CPU), operatively connected to said sensor means and said plurality of actuator mechanisms, for receiving first signals from said sensor means respectively indicating the positional presence of the outwardly projecting edge portions of the slip sheets, and for generating second signals to said plurality of actuator mechanisms for respectively terminating said independent movement of said plurality of movable framework members so as to properly position said vertically oriented post means with respect to the outwardly projecting edge portions of the slip sheets. 13. The system as set forth in claim 11, wherein: said sensor means disposed upon said plurality of vertically oriented post means are disposed within housing portions located upon lowermost end portions of said plurality of vertically oriented post means. 14. The system as set forth in claim 13, wherein: each one of said sensor housing portions is externally coated with polytetrafluoroethylene so as to facilitate the release of said sensor housing portions from the plastic film wrapping material as the plastic film wrapping material secures the downwardly folded edge portions of the slip sheets in their downwardly forwardly states as a result of a film wrapping operation. 15. A film wrapping machine for wrapping a palletize load, comprising a plurality of slip sheets interposed between vertically stacked layers of articles, within plastic film wrapping material, comprising: a fixed upstanding framework defining a wrapping station at which a palletized load is to be wrapped within plastic film wrapping material; vertically movable framework structure mounted upon said fixed upstanding framework and having a plastic film wrapping material dispensing assembly mounted thereon for movement around said wrapping station so as to wrap the palletized load in plastic film wrapping material as said plastic film wrapping material dispensing assembly moves around said wrapping station while said vertically movable framework structure moves vertically with respect to the palletized load disposed at said wrapping station; and a plurality of vertically oriented post means, mounted upon said vertically movable framework structure for movement with said vertically movable framework structure, for engaging outwardly projecting edge portions of the slip sheets, for folding the outwardly projecting edge portions of the slip sheets downwardly, and for maintaining the downwardly folded edge portions of the slip sheets in a downwardly folded state while said plastic film material dispensing assembly secures the downwardly folded edge portions of the slip sheets in their downwardly folded states as a result of said plastic film material dispensing assembly wrapping the palletized load in plastic film wrapping material. 16. The machine as set forth in claim 15, wherein said vertically movable framework structure comprises: a first lower plastic film material dispensing framework; and a second upper framework independently movable with respect to said first lower plastic film material dispensing framework and having said plurality of vertically oriented post means mounted thereon. 17. The machine as set forth in claim 16, wherein said second upper framework comprises: a first outer framework for surrounding the wrapping station at which the palletized load is to be disposed such that the palletized load within the plastic film wrapping material; and a second inner framework comprising a plurality of framework members arranged in opposed pairs wherein the framework members comprising each pair of said framework members are movable toward and away from each other upon said first outer framework so as to accommodate different sized palletized loads, and wherein each one of said plurality of framework members has at least one of said vertically oriented post means fixedly mounted thereon. 18. The machine as set forth in claim 17, further comprising: a plurality of actuator mechanisms mounted upon said first outer framework and operatively connected to each one of said movable framework members of said second inner framework for moving said plurality of movable framework members toward and away from each other. 19. The machine as set forth in claim 18, wherein: said plurality of actuator mechanisms are mounted upon said first outer framework so as to be separately connected to each one of said movable framework members such that each one of said movable framework members is independently movable relative to all of the other ones of said plurality of framework members. 20. The machine as set forth in claim 19, wherein: each one of a pair of said plurality of actuator mechanisms is operatively connected to an opposite end of each one of said movable framework members. 21. The machine as set forth in claim 11, wherein: each one of said plurality of framework members has a pair of spaced vertically oriented post means fixedly mounted thereon for engaging spaced regions of the outwardly projecting edge portions of the slip sheets so as to facilitate the downward folding of the outwardly projecting edge portions of the slip sheets. 2
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이 특허에 인용된 특허 (4)
Robinson William P. (Lockport NY), Hydraulic servovalve.
Goddard Charles W. (San Jose CA) Lucas John T. (Los Altos CA) Galvan Paul A. (San Jose CA), Solid-propellant-powered maneuvering system for spacecraft.
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