IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0493097
(2012-06-11)
|
등록번호 |
US-8736784
(2014-05-27)
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발명자
/ 주소 |
- Hausler, George Charles
- Schwartz, Daniel Ronald
- Thompson, Tyler Matthew
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출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
3 인용 특허 :
5 |
초록
▼
An environmental seal between two compartments, such as in a process transmitter, linked by a passageway contains an electrical cable. The seal includes a stop, a cable gland body, a compression bushing, a cable gland nut, and a first elastomeric seal. The stop projects from an interior surface of t
An environmental seal between two compartments, such as in a process transmitter, linked by a passageway contains an electrical cable. The seal includes a stop, a cable gland body, a compression bushing, a cable gland nut, and a first elastomeric seal. The stop projects from an interior surface of the passageway. The cable gland body is in contact with the stop and encircles a portion of the electrical cable. The compression bushing is within the cable gland body and encircles the portion of the electrical cable. The cable gland nut compresses the compression bushing and seals the compression bushing against the electrical cable and against an interior surface of the cable gland body. The first elastomeric seal seals between an exterior surface of the cable gland body and the interior surface of the passageway.
대표청구항
▼
1. An environmental seal between two compartments linked by a passageway containing an electrical cable, the seal comprising: a stop projecting from an interior surface of the passageway;a cable gland body within the passageway and in contact with the stop, the cable gland body encircling a portion
1. An environmental seal between two compartments linked by a passageway containing an electrical cable, the seal comprising: a stop projecting from an interior surface of the passageway;a cable gland body within the passageway and in contact with the stop, the cable gland body encircling a portion of the electrical cable;a compression bushing within the cable gland body and encircling the portion of the electrical cable;a cable gland nut to compress the compression bushing and seal the compression bushing against the electrical cable and against an interior surface of the cable gland body; anda first elastomeric seal to seal between an exterior surface of the cable gland body and the interior surface of the passageway. 2. The seal of claim 1, wherein the cable gland body includes a threaded end, the threaded end including threads on the interior surface of the cable gland body; and the cable gland nut includes threads on an exterior surface of the cable gland nut for engaging the threads of the cable gland body at the threaded end. 3. The seal of claim 1, wherein the first elastomeric seal is an o-ring seal. 4. The seal of claim 1, wherein the cable gland body and the cable gland nut are made of metal. 5. The seal of claim 1, wherein the cable gland body includes a first sealing channel on the exterior surface of the cable gland body; and the first elastomeric seal is partially contained by the first sealing channel. 6. The seal of claim 5, further comprising: a second sealing channel on the exterior surface of the cable gland body; anda second elastomeric seal partially contained by the second sealing channel and the interior surface of the passageway. 7. The seal of claim 6, further comprising: potting compound at least partially filling the passageway at a point where the passageway opens the other of the two compartments to further seal between the electrical cable, the cable gland body, the cable gland nut, and the interior surface of the passageway. 8. A dual-compartment housing for a process transmitter, the housing comprising: a first compartment containing process transmitter electronics;a second compartment containing a terminal block;a passageway linking the first compartment to the second compartment;an electrical cable passing through the passageway and electrically connecting the process transmitter electronics and the terminal block; andan environmental seal within the passageway, the seal including: a stop projecting from an interior surface of the passageway;a cable gland body within the passageway and in contact with the stop, the cable gland encircling a portion of the electrical cable;a compression bushing within the cable gland body and encircling the portion of the electrical cable;a cable gland nut to compress the compression bushing and seal the compression bushing against the electrical cable and against an interior surface of the cable gland body; anda first elastomeric seal to seal between an exterior surface of the cable gland body and the interior surface of the passageway. 9. The housing of claim 8, wherein the cable gland body includes a threaded end, the threaded end including threads on the interior surface of the cable gland body; and the cable gland nut includes threads on an exterior surface of the cable gland nut for engaging the threads of the cable gland body at the threaded end. 10. The housing of claim 8, wherein the cable gland body and the cable gland nut are made of metal. 11. The housing of claim 8, wherein the cable gland body includes a first sealing channel on the exterior surface of the cable gland body; and the first elastomeric seal is partially contained by the first sealing channel. 12. The housing of claim 11, wherein the environmental seal further includes: a second sealing channel on the exterior surface of the cable gland body; anda second elastomeric seal partially contained by the second sealing channel and the interior surface of the passageway. 13. The housing of claim 12, wherein the first elastomeric seal and the second elastomeric seal are o-ring seals. 14. The housing of claim 8, wherein the environmental seal further includes: potting compound at least partially filling the passageway at a point where the passageway opens the other of the two compartments to further seal between the electrical cable, the cable gland body, the cable gland nut, and the interior surface of the passageway. 15. The housing of claim 8, wherein the first compartment, the second compartment, and the passageway are a single piece of metal. 16. The housing of claim 8, wherein the terminal block includes potting compound sealing the electrical cable and the terminal block at a point where the electrical cable connects to the terminal block to seal the electrical cable. 17. The housing of claim 8, wherein the passageway is a cylinder and the second compartment includes a plurality of conduit entries, one of the conduit entries aligned with an axis of the passageway to permit machining of the interior surface of the passageway. 18. The housing of claim 17, wherein the second compartment contains an internal structure supporting the terminal block; the internal structure between the conduit entry aligned with the axis of the passageway and the passageway; the internal structure including a void aligned with the axis of the passageway and having a diameter at least as large as a diameter of the passageway to permit machining of the interior surface of the passageway. 19. The housing of claim 18, wherein the second compartment contains a conductive plate covering the void. 20. The housing of claim 8, wherein the first compartment includes a first compartment cover and the second compartment further includes a second compartment cover, the first compartment cover, and the second compartment cover oriented in the same direction. 21. The housing of claim 20, wherein the first compartment further includes a liquid crystal display and the first compartment cover includes a window. 22. A method for providing an environmental seal in a passageway containing an electrical cable between compartments of a dual-compartment housing of a process transmitter, the method comprising: inserting the electrical cable through a cable gland nut;inserting the electrical cable through a compression bushing;fitting a first elastomeric seal against an exterior surface of a cable gland body;inserting the electrical cable through the cable gland body;positioning the cable gland body along the length of the electrical cable;inserting the compression bushing into the cable gland body;threading the cable gland nut into the cable gland body;tightening the threaded cable gland nut to compress the compression bushing against the electrical cable and the cable gland body;inserting the electrical cable into the passageway; andpressing the cable gland body into the passageway until the cable gland body seats against a stop projecting from an interior surface of the passageway to seal the first elastomeric seal against the interior surface of the passageway. 23. The method of claim 22, further comprising: fitting a second elastomeric seal against the exterior surface of the cable gland body prior to inserting the electrical cable through the cable gland body;wherein pressing the cable gland body into the passageway also seals the second elastomeric seal against the interior surface of the passageway. 24. The method of claim 23, further comprising: depositing potting compound into the passageway on a side of the cable gland body opposite the stop; andcuring the potting compound to further seal between the electrical cable, the cable gland body, the cable gland nut, and the interior surface of the passageway.
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