IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0531116
(1990-05-31)
|
발명자
/ 주소 |
|
대리인 / 주소 |
Lackenbach Siegel Marzullo & Aronson
|
인용정보 |
피인용 횟수 :
13 인용 특허 :
5 |
초록
▼
A safety seal for a pressurized system, such as a pressurized oil sprayer used in lubricating engines, or a pressurized paint sprayer, wherein the closure, for an inlet member, for addition of material such as oil or paint, is prevented from being removed, when the system is in the pressurized state
A safety seal for a pressurized system, such as a pressurized oil sprayer used in lubricating engines, or a pressurized paint sprayer, wherein the closure, for an inlet member, for addition of material such as oil or paint, is prevented from being removed, when the system is in the pressurized state. A resilient band, inaccessible from the exterior of the system, is tightly compressed by internal pressurization against an interface between the closure and inlet member thereby locking the closure into a non-removable position. Reduction of internal pressure permits the resilient band to contract away from the interface, thereby unlocking the closure from its non-removable position, with the closure being removable thereafter for addition of material into the inlet.
대표청구항
▼
1. Safety means for a pressurized material dispensing system, having an inlet member for addition of dispensable material to the dispensing system, and a closure member sealingly seated on the inlet member, characterized in that pressure dependent means, exposed to interior pressure of the pressuriz
1. Safety means for a pressurized material dispensing system, having an inlet member for addition of dispensable material to the dispensing system, and a closure member sealingly seated on the inlet member, characterized in that pressure dependent means, exposed to interior pressure of the pressurized system and inaccessible from outside the pressurized system when the closure member is seated on the inlet member, prevents unseating of the closure member from the inlet member, when the system is in a state of pressurization above a pre-determined level; and wherein depressurization of the system to the pre-determined level deactivates the pressure dependent means whereby the closure member may be unseated from the inlet member for the introduction of additional dispensable material, wherein (i) the closure member is seated on the inlet member with a rotary engagement and with an interface being formed therebetween, and wherein the pressure dependent means comprises a resilient element positioned adjacent the interface between the closure and inlet members and in the path of a pressure outlet to the exterior of the system; whereby under internal pressurization, above the pre-determined level, the resilient element is urged, by a pressure differential between the interior and exterior of the system, against surfaces of both the inlet and closure members across the interface therebetween, whereby the resilient element seals the pressure outlet, preventing unwanted depressurization of the system, and simultaneously locks the inlet and closure members into a substantially fixed relative position; and wherein de-pressurization below the pre-determined level causes the resilient element to relax away from locking the inlet and closure members whereby the closure member can be unseated; (ii) the resilient element locks the inlet and closure members into the substantially fixed relative position by a combination of compressive and frictional forces supported by the interior pressure of the system above the pre-determined level; (iii) the closure member is unseated from the inlet member in an axial movement direction relative to the rotary engagement, and wherein the resilient element moves to a position whereby it impedes the axial movement, at internal pressurization above the pre-determined level; (iv) at least one of the surfaces of the closure and inlet members, against which the resilient member is urged, is roughened to enhance the frictional forces; (v) the closure member comprises a plug having external threads adapted to be threadingly engaged with internal threads of the inlet member for the sealing seating and rotary engagement and wherein the closure member has a central hollow therein, characterized in that the central hollow extends beyond the area of threaded engagement between the threads of the inlet and closure members, relative to the interior of the pressurized system, with walls of the extended portion of the central hollow being apertured with a plurality of pressure outlet vents extending therethrough; the closure member further having a circumferential groove on its exterior wall, with the circumferential groove being aligned with the outer ends of the pressure outlet vents; wherein the resilient element comprises a resilient band adapted to be seated and substantially completely retained within the circumferential groove, whereby under the internal pressurization above a pre-determined level, the resilient band is urged out of the circumferential groove into frictional engagement against surfaces of the inlet and closure members to provide the locking in the substantially fixed relative position. 2. The safety means of claim 1 wherein the inlet member comprises a circumferential recess, on the interior surface thereof, which is in adjacent alignment with the circumferential groove on the closure member, when the closure member is fully seated on the inlet member, and wherein the recess can retain only a portion of the resilient bend therein. 3. The safety means of claim 2 wherein the resilient band has a circular cross-section. 4. The safety means of claim 2 wherein the resilient band has a figure 8 cross-section. 5. The safety means of claim 2 wherein the dispensable material is lubricating oil. 6. A safety seal device comprising (i) a housing having an opening, a threaded interior passageway communicating with said opening, an annular peripheral groove adjacent and coaxial with the threaded passageway and an outlet passage communicating with said passageway and spaced from said opening; (ii) a sealing member having an external threaded portion adapted to threadably engage the interior passageway of said housing, an open chamber adapted to communicate with the outlet passage of the housing, a first annular peripheral groove adjacent and coaxial with the external threaded portion adapted to be positioned adjacent the annular peripheral groove of said housing, a plurality of passageways extending from said chamber to the annular peripheral groove of the sealing member and a cap portion adjacent the annular peripheral groove of the sealing member adapted to at least partly, closely fit into the opening in said housing to establish an annular passage between the housing and the cap of the sealing member which communicates with the aforesaid peripheral grooves when they are in alignment, a second annular peripheral groove arranged in said cap member and containing a first annular resilient ring which is adapted to control said housing and seal said annular passage between the housing and the cap; (iii) an annular resilient ring which fits snugly into the annular peripheral groove of the sealing member when the chamber in the groove is not pressurized and which expands radially outward into the annular peripheral groove of said housing and frictionally engage the housing to resist movement thereof. 7. The safety seal device in accordance with claim 6, wherein said resilient annular ring comprises two joined rings each of which is circular in cross-section. 8. The safety seal device in accordance with claim 6, wherein said housing opening and passageway, the open chamber of the sealing member, and the outlet passage of the housing are all cylindrical in shape and in axial alignment. 9. The safety seal device in accordance with claim 6, wherein the plurality of passageways extend symmetrically and radially from said chamber to said annular peripheral groove of said sealing member.
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