초록 ▼

A debris-catching system for preventing debris from falling into the pipe opening at the bottom of a manhole catch basin. The debris-catcher comprises two semi-circular halves hinged together such that the two halves may be folded and inserted into a manhole opening. The debris-catcher comprises ali

A debris-catching system for preventing debris from falling into the pipe opening at the bottom of a manhole catch basin. The debris-catcher comprises two semi-circular halves hinged together such that the two halves may be folded and inserted into a manhole opening. The debris-catcher comprises aligned apertures that allow it to be hooked and lowered into a manhole. The two halves are opened up to form a circular blocker which sets on the manhole bottom flat base. The debris-catcher allows normal effluent flow through the manhole while in place. The debris-catcher floats and will do so during an overflow condition. Further, the debris-catcher will resume its protective function after an overflow condition has subsided.

대표청구항 ▼

A debris-catching system for preventing debris from falling into the pipe opening at the bottom of a manhole catch basin. The debris-catcher comprises two semi-circular halves hinged together such that the two halves may be folded and inserted into a manhole opening. The debris-catcher comprises ali

A debris-catching system for preventing debris from falling into the pipe opening at the bottom of a manhole catch basin. The debris-catcher comprises two semi-circular halves hinged together such that the two halves may be folded and inserted into a manhole opening. The debris-catcher comprises aligned apertures that allow it to be hooked and lowered into a manhole. The two halves are opened up to form a circular blocker which sets on the manhole bottom flat base. The debris-catcher allows normal effluent flow through the manhole while in place. The debris-catcher floats and will do so during an overflow condition. Further, the debris-catcher will resume its protective function after an overflow condition has subsided. alent square inch. 19. The method according to claim 15 wherein the produced sheet or plate product has a maximum fatigue crack growth rate in accordance with one or more of the values in Table 4. 20. The process according to claim 1 wherein subsequent to the hot rolling of (e) the alloy is cold rolled. 21. The process according to claim 1 wherein the alloy is shaped by a forming operation after quenching but before an artificial aging treatment. 22. The process according to claim 1 wherein the alloy is clad on one or both rolling surfaces with a different metal composition prior to the thermal treatment in (d). 23. The process according to claim 1 wherein the hot rolling of (e) reduces the metal thickness by at least 25%. 24. The process according to claim 1 wherein the hot rolling of (e) reduces the metal thickness by at least 40%. 25. The process according to claim 1 wherein the alloy is clad on one or both rolling surfaces with a different metal composition. 26. The process according to claim 1 wherein the produced sheet or plate product has not more than 40,000 features revealed by SEM as reduced density features greater than 1 μm in major axis in an equivalent square inch. 27. The method according to claim 1 wherein the produced sheet or plate product has a maximum fatigue crack growth rate in accordance with one or more of the values in Table 4. 28. A process for producing a sheet or plate product comprising: (a) providing an aluminum alloy consisting essentially of 0.6 to 1.6% Si, 0.6 to 1.4% Mg, 0.3 to 1% Cu, balance essentially aluminum and incidental elements and impurities; (b) heating the alloy at 1020° F. or higher; (c) hot rolling the alloy to reduce its thickness by at least 40%; (d) thermally treating the alloy hot rolled in (c) at 1020° F. or more; (e) further hot rolling the alloy to further reduce its thickness by at least 30%; (f) solution heat treating the alloy at 1020° F. or higher; (g) quenching the alloy. 29. The process according to claim 28 wherein the alloy contains 0.25 to 0.8% Mn. 30. The process according to claim 28 wherein the alloy contains 0.5 to 9% Zn and 0.2 to 0.35% Cr. 31. The process according to claim 30 wherein the produced sheet or plate product has not more than 40,000 features revealed by SEM as reduced density features greater than 1 μm in major axis in an equivalent square inch. 32. The method according to claim 30 wherein the produced sheet or plate product has a maximum fatigue crack growth rate in accordance with one or more of the values in Table 4. 33. The process according to claim 29 wherein subsequent to (e) the alloy is cold rolled. 34. The process according to claim 30 wherein subsequent to (e) the alloy is cold rolled. 35. The process according to claim 28 wherein the produced sheet or plate product has not more than 40,000 features revealed by SEM as reduced density features greater than 1 μm in major axis in an equivalent square inch. 36. The method according to claim 28 wherein the produced sheet or plate product has a maximum fatigue crack growth rate in accordance with one or more of the values in Table 4. 37. A process for producing a sheet or plate product comprising: (a) providing an aluminum alloy consisting essentially of 0.5 to 1.8% Si, 0.5 to 1.5% Mg; 0.5 to 1.2% Cu, and either: (i) 0.2 to 0.9% Mn; or (ii) 0.5 to 0.9% Zn and 0.2 to 0.4% Cr; balance essentially aluminum and incidental elements and impurities; (b) heating the alloy at a high temperature; (c) hot rolling the alloy to reduce its thickness by at least 40%; (d) thermally treating the alloy hot rolled in (c) at 1020° F. or more; (e) further hot rolling the alloy to further reduce its thickness by at least 25%; (f) solution heat treating the alloy at 1020° F. or higher; (g) quenching the alloy. 38. The process according to claim 37 wherein the alloy contains said Mn. 39. The process according to claim 37 wherein the alloy contains said Zn and Cr. 40. The process accord ing to claim 38 wherein subsequent to (e) the alloy is cold rolled. 41. The process according to claim 39 wherein subsequent to (e) the alloy is cold rolled. 42. A process for producing a sheet or plate process comprising: (a) providing aluminum alloy consisting essentially of 0.6 to 1% Si, 0.8 to 1.2% Mg, 0.6 to 1.1% Cu, 0.2 to 0.8% Mn, balance essentially aluminum and incidental elements and impurities; (b) heating said alloy at 1020° F. or higher; (c) hot rolling the alloy to reduce its thickness by at least 40%; (d) thermally treating said alloy hot rolled in (c) at 1035° F. or higher; (e) further hot rolling the alloy to further reduce its thickness by at least 30%; (f) solution heat treating the alloy at 1030° F. or higher; (g) quenching the alloy; and (h) artificially aging the alloy. 43. The process according to claim 42 wherein the alloy is cold rolled subsequent to the hot rolling of (e). 44. The process according to claim 43 wherein said alloy also contains at least one but not more than three elements from the group consisting of 0.5 to 0.9% Zn, 0.1 to 0.35% Cr, 0.05 to 0.5% Ag, 0.03 to 0.3% Sc, 0.03 to 0.2% V, 0.03 to 0.2% Zr and 0.03 to 0.2% Hf. 45. The process according to claim 42 wherein the alloy is shaped by a forming operation after said quenching but before said artificial aging. 46. The process according to claim 42 wherein the alloy is shaped by a forming operation after said artificial aging. 47. The process according to claim 42 wherein the alloy is shaped by a forming operation during said artificial aging. 48. A process for producing a sheet or plate process comprising: (a) providing aluminum alloy consisting essentially of 0.6 to 1% Si, 0.8 to 1.2% Mg, 0.6 to 1.1% Cu, 0.2 to 0.8% Mn, balance essentially aluminum and incidental elements and impurities; (b) heating said alloy at 1020° F. or higher; (c) hot rolling the alloy to reduce its thickness by at least 40%; (d) thermally treating said alloy hot rolled in (c) at 1030° F. or higher; (e) further hot rolling the alloy to further reduce its thickness by at least 30%; (f) solution heat treating the alloy at 1030° F. or higher; and (g) quenching the alloy. 49. The process according to claim 48 wherein the produced sheet or plate product has not more than 40,000 features revealed by SEM as reduced density features greater than 1 μm in major axis in an equivalent square inch. 50. The method according to claim 48 wherein the produced sheet or plate product has a maximum fatigue crack growth rate in accordance with one or more of the values in Table 4. 51. A process for producing a sheet or plate process comprising: (a) providing aluminum alloy consisting essentially of 0.6 to 1% Si, 0.8 to 1.2% Mg, 0.6 to 1.1% Cu, 0.2 to 0.8% Mn, balance essentially aluminum and incidental elements and impurities; (b) heating said alloy at 1020° F. or higher; (c) hot rolling the alloy to reduce its thickness; (d) hot roll bonding said alloy to a cladding alloy on one or both roll faces thereof; (e) further hot rolling said alloy and further reducing its thickness; (f) the thickness reductions in (c), (d) and (e) totaling at least 40%; (g) thermally treating the hot rolled alloy at 1020° F. or higher; (h) further hot rolling the alloy to further reduce its thickness by at least 30%; (i) solution heat treating the alloy at 1030° F. or higher; and (j) quenching the alloy. 52. The process according to claim 51 wherein the cladding alloy contains Mg and Si. 53. The process according to claim 52 wherein the produced sheet or plate product has not more than 40,000 features revealed by SEM as reduced density features greater than 1 μm in major axis in an equivalent square inch. 54. The method according to claim 52 wherein the produced sheet or plate product has a maximum fatigue crack growth rate in accordance with one or more of the values in Table 4. 55. The process according to claim 51 wherein the cladding alloy is essentially