IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0828673
(1986-02-12)
|
발명자
/ 주소 |
- Kirkland
- Jr. Thomas R. (Mooresville NC)
|
출원인 / 주소 |
- Ingersoll-Rand Company (Woodcliff Lake NJ 02)
|
인용정보 |
피인용 횟수 :
10 인용 특허 :
1 |
초록
▼
The valve has a cylindrical, cartridge-like housing in which a piston is slidably disposed. The piston subdivides the housing into an outer chamber, at one housing end, into which oil under pressure is admitted, and an inner chamber from which oil is discharged. Ports formed in the housing open onto
The valve has a cylindrical, cartridge-like housing in which a piston is slidably disposed. The piston subdivides the housing into an outer chamber, at one housing end, into which oil under pressure is admitted, and an inner chamber from which oil is discharged. Ports formed in the housing open onto the inner chamber and allow the oil to pass therethrough and on into an associated air compressor. The other end of the valve housing defines a control chamber. The piston has a depending, cylindrical shank which (a) moves into, and removes from, the control chamber, and (b) has a disc, fixed onto the end of the shank, which is sealingly engaged with the wall of the control chamber. Channels are formed in the periphery of the piston, to allow oil to flow from the outer chamber to the inner chamber, but a land in the housing defines a seat for the piston which, when the piston closes thereupon, interdicts the aforesaid oil flow. A pilot, compressed air supply, tapped off from the compressed air discharge line of the associated air compressor, is admitted into the control chamber to displace the disc and unseat the piston. In the absence of the pilot supply then, as when the air compressor is shut down, the oil pressure in the outer chamber seats the piston, sealingly, on the land.
대표청구항
▼
A fluid control valve, comprising: a housing having a given axis and a bounding, circumferential, inner wall; a piston, in said housing, having a head (a) movable along said axis, and (b) subdividing said housing into inner and outer chambers; first means for admitting fluid into said outer chamber;
A fluid control valve, comprising: a housing having a given axis and a bounding, circumferential, inner wall; a piston, in said housing, having a head (a) movable along said axis, and (b) subdividing said housing into inner and outer chambers; first means for admitting fluid into said outer chamber; and second means for discharging fluid from said inner chamber; wherein said head has outermost, circumferential surfaces engaged with said wall for guiding said piston in its axial movement; said head has conduit means for effecting fluid communication between said chambers; and further including a land, in said housing, intermediate opposite ends of said housing; wherein said head has a shoulder for closure thereof onto, and for removal thereof from, said land to interdict, and to permit, fluid communication between said chambers; said conduit means comprises a plurality of channels formed in said head; said outermost circumferential surfaces are interrupted by said channels of said plurality thereof; and said channels are radially outwardly disposed, relative to said shoulder.
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