A fire-fighting monitor includes a housing, a nozzle coupler, and a pivot joint coupler comprising an internal passageway and a pivot member. The pivot member is pivotally mounted to the housing at the outlet of the housing. The nozzle coupler is mounted to the pivot joint coupler wherein the intern
A fire-fighting monitor includes a housing, a nozzle coupler, and a pivot joint coupler comprising an internal passageway and a pivot member. The pivot member is pivotally mounted to the housing at the outlet of the housing. The nozzle coupler is mounted to the pivot joint coupler wherein the internal passageway of the pivot joint coupler is in communication with the internal passageways of the housing and the nozzle coupler, wherein the weight at the nozzle coupler generates a gravitational moment about the pivot axis. In addition, the nozzle coupler has a central axis defining a reference line, which is offset from the first pivot axis wherein a reaction force generated by fluid flowing through the nozzle coupler generates a moment about the first pivot axis in a direction opposed from said gravitational moment.
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We claim: 1. A fire-fighting monitor comprising: a housing defining an internal passageway defining an inlet and an outlet; a nozzle coupler having an internal passageway defining an inlet and an outlet; a pivot joint coupler comprising a unitary body and a first pivot member, said unitary body hav
We claim: 1. A fire-fighting monitor comprising: a housing defining an internal passageway defining an inlet and an outlet; a nozzle coupler having an internal passageway defining an inlet and an outlet; a pivot joint coupler comprising a unitary body and a first pivot member, said unitary body having an internal passageway with a non-linear central axis, said passageway defining an inlet and an outlet, said first pivot member pivotally mounting said inlet of said pivot joint coupler at said outlet of said housing to define a first horizontal pivot axis, and said inlet of said nozzle coupler mounted at said outlet of said pivot joint coupler by a second pivot member to define a second horizontal pivot axis, wherein said internal passageway of said pivot joint coupler is in communication with said internal passageways of said housing and said nozzle coupler, said second horizontal pivot axis in a fixed, spaced relationship to said first horizontal pivot axis and offset above said first horizontal pivot axis and wherein the weight at the nozzle coupler generates a gravitational moment about said first horizontal pivot axis; and said nozzle coupler having a central axis extending along said internal passageway of said nozzle coupler from said outlet to said inlet of said nozzle coupler and defining a reference line, said reference line extending into said pivot coupler and through said second horizontal pivot axis offset from and above said first horizontal pivot axis when said monitor is placed on a horizontal surface. 2. The monitor according to claim 1, wherein said first pivot member of said pivot joint coupler comprises a ball member. 3. The monitor according to claim 1, wherein said second pivot axis is generally parallel to said first pivot axis. 4. The monitor according to claim 1, wherein said first pivot member of said pivot joint coupler is configured at said housing to have a first stiffness about said first horizontal pivot axis, said second pivot member being configured at said nozzle coupler to have a second stiffness about said second horizontal pivot axis, said first stiffness being greater than said second stiffness wherein it is easier to pivot said nozzle coupler about said pivot joint coupler than to pivot said pivot joint coupler about said housing. 5. The monitor according to claim 1, wherein one of said housing and said pivot joint coupler includes a stop to limit pivoting of said pivot joint coupler about said first horizontal pivot axis. 6. The monitor according to claim 5, wherein one of said nozzle coupler and said pivot joint coupler includes a stop to limit pivoting of said nozzle coupler about said second horizontal pivot axis. 7. The monitor according to claim 1, wherein said pivot joint coupler comprises a double pivot joint coupler. 8. The monitor according to claim 7, wherein said double pivot joint coupler comprises a double ball joint coupler. 9. The monitor according to claim 1, wherein said nozzle coupler includes a first nozzle coupler body, said first nozzle coupler body pivotally mounted to said pivot joint coupler by said second pivot member. 10. The monitor according to claim 9, wherein said nozzle coupler includes a second nozzle coupler body pivotally mounted to said first nozzle coupler body, said second nozzle coupler body including a threaded portion for mounting one of a nozzle and a stream shaper to said nozzle coupler. 11. The monitor according to claim 10, wherein said second nozzle coupler body is pivotally mounted to said first nozzle coupler body about an axis generally perpendicular to said first and second horizontal pivot axes. 12. The monitor according to claim 1, further comprising a valve, said valve controlling the flow of fluid through said monitor. 13. The monitor according to claim 12, wherein said valve comprises a ball valve. 14. The monitor according to claim 12, wherein said monitor comprises a portable fire-fighting monitor. 15. The monitor according to claim 14, wherein said monitor includes a plurality of feet for supporting said monitor on a support surface. 16. The monitor according to claim 1, further comprising a counterbalance device, said counterbalance device comprising an annular member mounted to said housing at said first horizontal pivot axis, said counterbalance device further comprising a counterbalance device pivot member mounted to said pivot joint coupler and a second unitary body mounted about said counterbalance device pivot member, said second unitary body being adapted to engage and generate an interference with an inner surface of said annular member when said pivot joint coupler is pivoted about said first horizontal pivot axis in a first direction and adapted to release the interference with said inner surface of said annular member when said pivot joint coupler is pivoted about said first horizontal pivot axis in an opposed second direction from said first direction. 17. The monitor according to claim 16, wherein said second unitary body includes at least two fins, said fins being configured to engage and generate said interference with said inner surface of said annular member when said pivot joint coupler is pivoted about said first horizontal pivot axis in said first direction and adapted to release said interference with said inner surface of said annular member when said pivot joint coupler is pivoted about said first horizontal pivot axis in said second direction. 18. The monitor according to claim 17, wherein said fins comprise generally L-shaped fins. 19. The monitor according to claim 18, wherein said second unitary body includes a central portion, each of said L-shaped fins comprising a first portion extending from said central portion and a second portion angled with respect to said first portion and being adapted to engage said inner surface of said annular member and generate an interference with said inner surface of said annular member when said pivot joint coupler is pivoted about said first horizontal pivot axis in said first direction and adapted to be released from the interference with said inner surface of said annular member when said pivot joint coupler is pivoted about said first horizontal pivot axis in said second direction. 20. The monitor according to claim 19, wherein said counterbalance device pivot member includes an outer perimeter, each of said fins being generally aligned with a tangent line to said outer perimeter. 21. The monitor according to claim 20, wherein each of said first portions are generally aligned with the tangent line to said outer perimeter. 22. The monitor according to claim 16, wherein said second unitary body comprises an aluminum body. 23. The monitor according to claim 17, wherein said fins expand outwardly toward said annular member and function as columns when said pivot joint coupler is pivoted in said first direction to thereby bind against said inner surface of said annular member and compress and function as beams when said pivot joint coupler is pivoted in said second direction wherein said fins release said interference with said inner surface of said annular member. 24. The monitor according to claim 17, wherein said second unitary body includes at least three fins. 25. The monitor according to claim 24, wherein said second unitary body includes at least four fins. 26. The monitor according to claim 17, wherein said fins are configured to expand outwardly when said pivot joint coupler is pivoted in said first direction and to deflect and compress inwardly when said pivot joint coupler is pivoted about said first horizontal pivot axis in said second direction. 27. The monitor according to claim 16, wherein said second unitary body includes a plurality of springs, said springs being compressible when said pivot joint coupler is pivoted in said second direction and being adapted to be substantially rigid when said pivot joint coupler is pivoted in said first direction wherein said springs bind against said inner surfaces of said annular member. 28. The monitor according to claim 17, wherein said second unitary body and said fins are monolithic to thereby form a unitary part. 29. The monitor according to claim 16, wherein said annular member comprises a housing. 30. A fire-fighting monitor comprising: a housing defining an internal passageway defining an inlet and an outlet; a nozzle coupler defining an inlet and an outlet; a pivot joint coupler being pivotally mounted at said housing about a first horizontal pivot axis, said pivot joint coupler comprising a double ball joint coupler, said double ball joint coupler comprising a unitary body defining an internal passageway, a first ball member, and a second ball member, said internal passageway of said pivot joint coupler defining an inlet at said first ball member and an outlet at said second ball member and being in fluid communication with said internal passageway of said housing, said first ball member pivotally mounted to said housing at said outlet of said housing, and said second ball member being pivotally mounted to said inlet of said nozzle coupler, said first ball member defining said first horizontal pivot axis, and said second ball defining a second horizontal pivot axis; and said nozzle coupler mounted at said pivot joint coupler about said second horizontal pivot axis parallel to said first horizontal pivot axis, said second horizontal pivot axis being in fixed spaced relation to said first horizontal pivot axis, and said pivot joint coupler being configured to maintain said second horizontal pivot axis at or above said first horizontal pivot axis when said monitor is placed on a horizontal surface. 31. The monitor according to claim 30, wherein said first ball member of said double ball joint coupler is configured at said housing to have a first stiffness about said first horizontal pivot axis, said second ball member being configured at said nozzle coupler to have a second stiffness about said second horizontal pivot axis, said first stiffness being greater than said second stiffness wherein it is easier to pivot said nozzle coupler about said double ball joint coupler than to pivot said double ball joint coupler about said housing. 32. The monitor according to claim 30, wherein one of said housing and said double ball joint coupler includes a stop to limit pivoting of said double ball joint coupler about said first horizontal pivot axis. 33. The monitor according to claim 32, wherein one of said nozzle coupler and said double ball joint coupler includes a stop to limit pivoting of said nozzle coupler about said second pivot axis. 34. The monitor according to claim 33, wherein said nozzle coupler includes a socket member, said socket member of said nozzle coupler pivotally mounting said nozzle coupler to said second ball member of said double ball joint coupler. 35. The monitor according to claim 34, wherein said nozzle coupler includes a third ball member pivotally mounted to said socket member of said nozzle coupler, said third ball member including a threaded portion for mounting one of a nozzle and a stream shaper to said nozzle coupler. 36. The monitor according to claim 35, wherein said third ball member of said nozzle coupler is pivotally mounted to said socket member of said nozzle coupler about an axis generally perpendicular to said first and second horizontal pivot axes. 37. The monitor according to claim 36, further comprising a valve at said inlet of said housing, said valve controlling the flow of fluid through said monitor. 38. The monitor according to claim 37, wherein said valve comprises a ball valve. 39. The monitor according to claim 38, wherein said monitor comprises a portable fire-fighting monitor.
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