IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0982510
(2004-11-06)
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발명자
/ 주소 |
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출원인 / 주소 |
- Parker Hannifin Corporation
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인용정보 |
피인용 횟수 :
3 인용 특허 :
6 |
초록
▼
In a plug-style valve, such as an air-conditioning service plug-style valve, basically including a valve body, a stem, a retainer including a service fitting and a valve core, and a cap, the plug including an intermediate O-ring, between the valve body and the plug, disposed in an intermediate O-rin
In a plug-style valve, such as an air-conditioning service plug-style valve, basically including a valve body, a stem, a retainer including a service fitting and a valve core, and a cap, the plug including an intermediate O-ring, between the valve body and the plug, disposed in an intermediate O-ring seal groove of a serpentine shape and having integral first and second O-ring groove portions, the intermediate O-ring being stretched a predetermined amount during installation and defining, therebetween and the valve body and the plug, a closed volume without a primary lateral passage in the plug, with the O-ring stretching preferably being in excess of about 15% to offset refrigerant medium absorption effects that will cause the O-ring to swell, become too large and become loose within its retaining groove, with the single cap including a redundant seal that covers both the valve actuation stem and the service fitting
대표청구항
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What is claimed is: 1. An air conditioning service plug-type valve, comprising in combination: a. a valve body having a chamber and an inlet opening and an outlet opening communicating with said chamber, said valve body including, at an open end of said chamber, an exteriorly threaded portion and a
What is claimed is: 1. An air conditioning service plug-type valve, comprising in combination: a. a valve body having a chamber and an inlet opening and an outlet opening communicating with said chamber, said valve body including, at an open end of said chamber, an exteriorly threaded portion and a generally cylindrical pocket portion having a deformable collar; b. a stem, including a generally cylindrical plug with a peripheral surface, located on one end and a contiguous actuating portion extending from another end thereof, said plug being disposed within said chamber and being rotatable within said chamber, about an axis between a closed position and an open position; c. said plug including a first, through, lateral passageway communicating with said inlet and outlet openings when said plug is in said open position, thereby providing a first flowpath for the fluid through said valve, said inlet and outlet openings, together with said first lateral passageway, being disposed along a straight axis when said plug is in said open position; d. said plug further including a second lateral passageway normal to, emanating from and communicating said first lateral passageway with said valve body chamber; e. a first seal, disposed between said valve body and said plug in a first seal groove in said plug peripheral surface; f. a second seal, disposed between said valve body and said plug in a second seal groove, of a serpentine shape and including contiguous first and second seal groove portions, in said plug peripheral surface, said second seal being stretched a predetermined amount during its installation into said second seal groove and being spaced apart from said first seal and defining, therebetween and said valve body and said plug, a closed volume without said first lateral passageway; g. said second seal, upon installation thereof in said second seal groove assumes the shape of said second seal groove, thus including first and second contiguous seal portions, said first seal portion being disposed above said inlet and outlet openings, said second seal portion extending from one end of said first contiguous seal portion downwardly to below said inlet and outlet openings and then back upwardly to another contiguous end of said first seal portion such that one of said inlet and outlet openings is disposed within said closed volume and the other of said inlet and outlet openings is disposed outside of said closed volume when said plug is in said closed position; h. said stem contiguous actuating portion including a generally cylindrical portion, including a radially extending stop member, adjoining said plug, a tool-receiving portion adjoining said generally cylindrical stem portion, and a service fitting adjoining said tool-receiving portion, said stem further including a central axial passageway normal to, emanating from and communicating said first lateral passageway with said service fitting, said service fitting being adapted for receiving a valve core for refrigerant medium charging purposes; i. a generally annular retainer member positioned around said stem cylindrical portion, axially within said valve body pocket portion, with the inside diameter of said retainer member being smaller than the diameter of said plug and having a recessed portion of a predetermined circumferential extent, with said stop member being received within said recessed portion, said valve body deformable collar being adapted to be radially inwardly swaged over said retainer member during the assembly of said valve; j. a cap for sealing said valve cavity and protecting said stem actuating portion, said cap including an interiorly threaded base portion, adapted to mate with said threaded valve body portion, and an integral truncated closure portion having an internal cavity for covering said service fitting and valve core; and k. a third seal, located in an internal gland portion of said cap, adapted for sealing said cap against said valve body swaged collar portion, upon assembly of said cap onto said valve body. 2. The air conditioning service plug-type valve of claim 1, wherein said second lateral passageway is angularly spaced about 90 degrees from said first lateral passageway. 3. The air conditioning service plug-type valve of claim 1, wherein said second seal groove includes a second seal first groove portion being substantially parallel with said first seal first groove, for retaining said second seal first portion, and a contiguous second seal second groove portion, said second groove portion being generally U-shaped in its angular extent, for supporting said second seal second portion. 4. The air conditioning service plug-type valve of claim 3, wherein said second seal first groove portion is substantially semicircular in angular extent. 5. The air conditioning service plug-type valve of claim 3 wherein said second seal second groove portion is substantially semicircular in angular extent. 6. The air conditioning service plug-type valve of claim 3 wherein said second seal first groove portion, together with said second groove portion is substantially circular in angular extent. 7. The air conditioning service plug-type valve of claim 1, wherein the amount of stretching of said second seal is in excess of about 15%. 8. In an air conditioning service plug-type valve, a stem, comprising: a. a generally cylindrical plug with a peripheral surface, located on one end thereof and a contiguous actuating portion extending from another end thereof, said plug being disposed in valve body having a chamber and inlet and outlet openings communicating with said chamber, said plug being rotatable within said chamber about an axis between a closed position and an open position; b. said plug including a first, lateral through passageway communicating with said inlet and outlet openings when said plug is in said open position, thereby providing a first fluid path through said valve, said inlet and outlet openings, together with said first passageway, being disposed along a straight axis when said plug is in said open position; c. said plug further including a second lateral passageway normal to, emanating from and communicating said first lateral passageway with said valve body chamber; d. a first seal groove in said plug peripheral surface for retaining a first seal therein; e. a second seal groove in said plug peripheral surface, of a serpentine shape, for retaining a second seal therein, said second seal being stretched a predetermined amount during its installation into said second seal groove and being spaced apart from said first seal groove and defining, therebetween and said valve body and said plug, a closed volume without said first lateral passageway; and f. said contiguous actuating portion including a generally cylindrical portion including a radially extending stop member, adjoining said plug, a tool-receiving portion adjoining said generally cylindrical portion, and a service fitting adjoining said tool-receiving portion, said stem further including a central axial passageway normal to, emanating from and communicating said first lateral passageway with said service fitting, said service fitting being adapted for receiving a valve core for refrigerant medium charging purposes. 9. The stem of claim 8, wherein second seal groove includes a second seal first groove portion, substantially parallel with said first seal groove, for retaining said second seal first portion, and a contiguous second seal second groove portion, substantially U-shaped, for retaining said second seal second portion. 10. The stem of claim 8 wherein at least one of said second seal first and second groove portions is substantially semicircular in angular extent. 11. The stem of claim 8, wherein the amount of stretching of said second seal is in excess of about 15%. 12. The stem of claim 8, wherein said second lateral passageway is angularly spaced about 90 degrees from said first lateral passageway. 13. A plug-type valve comprising in combination: a. a valve body having a central chamber and angularly spaced inlet and outlet openings communicating with said chamber, said valve body including, at an open end of said chamber, a threaded portion and a generally cylindrical pocket portion having a deformable collar; b. a stem, including a cylindrical plug with a peripheral surface, located at end and an integral actuating portion extending from another end thereof, said plug being disposed within said chamber and being rotatable about an axis between closed and open positions; c. said plug including a primary lateral through passage communicating with said inlet and outlet openings when said plug is in said open position, thereby providing a first flowpath through said valve, said inlet and outlet openings, together with said primary passage, being coaxial when said plug is in said open position; d. said plug further including an auxiliary lateral passage normal to, emanating from and communicating said primary passage with said valve body chamber, said auxiliary passage being angularly disposed about 90 degrees from said primary lateral passage; e. an end O-ring, disposed between said valve body and said plug in an end seal groove in said plug peripheral surface; f. an intermediate O-ring, disposed in said plug peripheral surface between said valve body and said plug in an intermediate O-ring groove of a serpentine shape and having integral first and second O-ring portions, said intermediate O-ring being stretched a predetermined amount during its installation into said intermediate O-ring groove and defining, therebetween and said valve body and said plug, a closed volume without said primary passage; g. said intermediate O-ring, upon said installation, assuming the serpentine shape of said intermediate O-ring groove, thus including first and second integral O-ring portions, said first O-ring portion being disposed on one side of said inlet and outlet openings, said second O-ring portion extending therefrom to another side of said inlet and outlet openings and then back to another end of said first O-ring portion such that one of the inlet and outlet openings is disposed within said closed volume and the other of said inlet and outlet openings is disposed outside of said closed volume when said plug is in said closed position; h. said stem actuating portion including a cylindrical stem portion, having a stop member, adjoining said plug, a tool-receiving portion adjoining said stem portion, and a service fitting adjoining said tool receiving portion, said stem further including a central axial passage normal to, emanating from and communicating said primary lateral passage with said service fitting, the latter including a valve core for gaseous medium charging purposes; i. an annular retainer member positioned around said cylindrical stem portion, axially within said valve body pocket portion, with the inside diameter of said retainer member being of a diameter smaller than that of said plug and including a recessed portion, with said stop member being received therein, said valve body deformable collar being inwardly deformed over said retainer member; j. a cap, for sealing said valve cavity and said stem actuating portion, having a threaded base portion, for mating with said valve body threaded portion, and an integral closure portion having an internal cavity for covering said service fitting; and k. a cap seal, located within said cap, for sealing said valve body deformed collar portion. 14. The plug-type valve of claim 13, wherein said intermediate O-ring groove includes a first groove portion, substantially parallel with said end O-ring groove, for retaining said intermediate O-ring first portion, and an integral intermediate O-ring second groove portion, of general U-shape in its angular extent, for retaining said intermediate O-ring second portion. 15. The plug-type valve of claim 13, wherein the angular extent of at least one of said intermediate O-ring first and second portions is about 180 degrees. 16. The plug-style valve of claim 13, wherein the amount of stretching of said intermediate O-ring is in excess of about 15%.
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