1. An apparatus comprising:
a coke drum for coking hydrocarbon substances, the coke drum having a bottom flange;
a funnel removably attached to said bottom flange;
a valve connected to said funnel, said valve being actuatable between an open position and a closed position;
a steam supply providing a source of steam at a higher pressure than a pressure applied to said valve from contents of said coke drum located upstream of said valve, said steam supply supplying the steam at the higher pressure to said valve such that if said valve leaks, said steam supply causes said valve to fail safe; and
a discharge conduit disposed downstream of said valve for removing coke from said coke drum when said valve is in the open position.
2. An apparatus according to claim 1, wherein said discharge conduit comprises a mitered bend.
3. An apparatus according to claim 2, wherein said mitered section is overlaid.
4. An apparatus according to claim 1, further comprising another valve, which is disposed beneath said valve, such that if said valve leaks, said other valve contains the contents of said coke drum.
5. An apparatus according to claim 1, wherein said discharge conduit is a pipe.
6. An apparatus according to claim 1, wherein said discharge conduit is a chute with an open top.
7. An apparatus according to claim 1, further comprising:
a side conduit for feeding or draining said coke drum,
said apparatus being adapted such that when said valve is closed, the hydrocarbon substance can be fed from said side conduit.
8. An apparatus according to claim 1, wherein said discharge conduit is coupled to said valve which is coupled to said coke drum, such that no gap is formed between the bottom of said coke drum and a proximal end of said discharge conduit.
9. An apparatus according to claim 1, wherein said valve is a ball valve.
10. An apparatus according to claim 7, wherein said side conduit is connected to said funnel.
11. A closed system for discharging coke from a coke drum, said system comprising:
a coke drum having a bottom flange;
a funnel removably attached to said bottom flange;
a ball valve connected to said funnel, said valve being actuatable between an open position and a closed position;
a discharge conduit disposed beneath the ball valve; and
a steam supply providing a source of steam at a higher pressure than a pressure applied to said ball valve from contents of said coke drum located upstream of said ball valve, said steam supply supplying the steam at the higher pressure to said ball valve such that if said ball valve leaks, said steam supply causes said ball valve to fail safe,
wherein coke exiting the coke drum is enclosed until exiting said discharge conduit.
12. A discharge system for a coke drum, said system comprising:
a coke drum having a bottom flange;
a funnel removably attached to said bottom flange;
a side conduit for feeding petroleum to said coke drum;
guiding means for guiding coke from a bottom of said coke drum;
sealing means, disposed downstream of said funnel and upstream of said guiding means, for sealing coke in said coke drum; and
steam supplying means providing a source of steam at a higher pressure than a pressure applied to said sealing means from contents of said coke drum located upstream of said sealing means, said steam supplying means supplying the steam at the higher pressure to said sealing means such that if said sealing means leaks, said steam supplying means causes said sealing means to fail safe.
13. A discharge system according to claim 12, wherein said guiding means includes a pipe.
14. A discharge system according to claim 12, wherein said guiding means includes a pipe and a mitered bend.
15. A discharge system according to claim 12, wherein said sealing means comprises a ball valve.
16. A discharge system according to claim 12, wherein said side conduit is connected to said funnel.
17. An apparatus comprising:
a coke drum for coking hydrocarbon substances, the coke drum having a bottom flange;
a side conduit connected to a lower portion of said coke drum for feeding and draining said coke drum;
a funnel removably attached to said bottom flange;
a valve connected to said funnel, said valve being actuatable between an open position and a closed position;
a steam supply providing a source of steam at a higher pressure than a pressure applied to said valve from contents of said coke drum located upstream of said valve, said steam supply supplying the steam at the higher pressure to said valve such that if said valve leaks, said steam supply causes said valve to fail safe; and
a discharge conduit disposed downstream of said valve for removing coke from said coke drum when said valve is in the open position,
wherein said coke drum is filled with the hydrocarbon substances via said side conduit before coking.
18. The apparatus according to claim 17, wherein the hydrocarbon substances are coked in said coke drum by: (i) filling, via said side conduit, the coke drum with the hydrocarbon substances while said valve is closed, (ii) quenching the hydrocarbon substances using a quenching medium, supplied via said side conduit, and (iii) draining the quenching medium from said coke drum via said side conduit, and wherein said valve is subsequently opened and the formed coke is cut for removal from said coke drum via said discharge conduit.
19. An apparatus according to claim 17, further comprising a steam supply conduit connected to said valve, wherein said steam supply conduit supplies steam to said valve at a higher pressure than that upstream of said valve, such that, if said valve leaks, the steam supply will cause said valve to fail safe.
20. An apparatus according to claim 17, wherein said discharge conduit is coupled to said valve which is coupled to said coke drum, such that no gap is formed between the bottom of said coke drum and a proximal end of said discharge conduit.
21. An apparatus according to claim 17, wherein said valve is a ball valve.
22. An apparatus according to claim 17, wherein said side conduit is connected to said funnel.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A cover for an optical device comprising:
a cap; and
a means for releasably and securely holding a display such that the display can be selectively removed from the means for releasably and securely holding a display;
wherein the means for releasably and securely holding a display is permanently attached to the cap.
2. The cover for an optical device of claim 1, wherein the means for releasably and securely holding a display is integrally formed with the cap.
3. The cover for an optical device of claim 1, wherein the cap has an interior portion and the means for releasably and securely holding a display is permanently attached to the interior portion of the cap.
4. The cover for an optical device of claim 1, wherein the means for releasably and securely holding a display is at least two resilient tabs.
5. The cover for an optical device of claim 1, wherein the means for releasably and securely holding a display is at least one resilient post.
6. The cover for an optical device of claim 1, wherein the means for releasably and securely holding a display is at least one magnet.
7. The cover for an optical device of claim 1, wherein the means for releasably and securely holding a display is an annular ridge formed in the cap.
8. The cover for an optical device of claim 1, wherein the display has at least one indent formed therein such that the display may be selectively removed from the means for releasably and securely holding a display by the at least one indent.
9. A cover for an optical device comprising:
a body capable of attaching the cover to the optical device;
a cap connected to the body such that the cap can be opened or closed, the cap having an interior portion;
a display with a perimeter; and
at least one resilient retention member attached to the interior portion of the cap for retaining the display, the at least one resilient retention member capable of temporarily deforming to receive and release the display;
wherein the display has at least one indent formed in the perimeter such that the display may be released from the at least one resilient retention member at least through the use of the at least one indent.
10. The cover for an optical device of claim 9, wherein the display has at least two sides and data of personal equipment is visible by at least one side of the at least two sides.
11. The cover for an optical device of claim 9, wherein the at least one resilient retention member is a tab.
12. The cover for an optical device of claim 9, wherein the at least one resilient retention member is a post.
13. The cover for an optical device of claim 9, wherein the at least one resilient retention member is an annular ring.
14. The cover for an optical device of claim 9, wherein the display is formed by coupling a top layer to a bottom layer and wherein the top layer is a different color than the bottom layer.
15. The cover for an optical device of claim 9, wherein the display is formed by coupling a top layer and a bottom layer to a middle layer and wherein the top layer and bottom layer are a different color than the middle layer.
16. A sighting device with a cover having a display for shooting firearms comprising:
a first substrate having a first color;
a second substrate having a second color different than the first color and fixed to the first substrate to form the display; and
wherein the first substrate is engraved such that the second substrate is exposed through the engraved first substrate and conveys shooting information; and
wherein the display is shaped such that the display may be firmly retained by the cover and has a perimeter formed such that the perimeter may be used to remove the display from the cover.
17. The display of claim 16, further comprising a third substrate with a third color different than the second color, wherein the second substrate has a first side and a second side and the first substrate is fixed to the first side of the second substrate and the third substrate is fixed to the second side of the second substrate and wherein the third substrate is engraved such that the second substrate is exposed through the engraved third substrate.
18. The display of claim 17, wherein the display is round in shape and the perimeter has indentations formed therein.
19. The display of claim 18, wherein the first and second substrate are of a material such that the shape and the first and second colors remain substantially the same when exposed to moisture, ultraviolet light and temperatures in the range of \u221220\xb0 F. to 120\xb0 F.