초록 ▼

A rope ladder assembly having a colored ladder rung comprised of fiber reinforced thermoplastic is disclosed. The rung has an integrally molded non-skid top surface supported on longitudinally oriented support rib members and a plurality of transversely oriented crossing members. The rung is integra

A rope ladder assembly having a colored ladder rung comprised of fiber reinforced thermoplastic is disclosed. The rung has an integrally molded non-skid top surface supported on longitudinally oriented support rib members and a plurality of transversely oriented crossing members. The rung is integrally molded of fiber reinforced plastic that is injected into a mold in a manner such that the flow path of fiber reinforced plastic is directed primarily longitudinally along the length of the rung during the molding process. A color additive comprising a base carrier and a non-organic class of pigment is added to the fiber reinforced thermoplastic prior to injection in the mold. The color additive is added at more than 2% of the thermoplastic mixture.

대표청구항 ▼

1. A rope and ladder rung assembly comprising: (a) a plurality of ladder rungs, each said ladder rung having a rectangular longitudinally extending top rung surface, longitudinally extending sides, first and second ends,a plurality of support ribs extending longitudinally along a length of said top

1. A rope and ladder rung assembly comprising: (a) a plurality of ladder rungs, each said ladder rung having a rectangular longitudinally extending top rung surface, longitudinally extending sides, first and second ends,a plurality of support ribs extending longitudinally along a length of said top rung surface between said first and second ends, said support ribs having a side profile extending below said top rung surface, said support ribs creating a longitudinally extending bottom rung surface, at least one crossing member providing lateral support to said plurality of support ribs, said crossing member having a side profile height less than a side profile height of said plurality of support ribs,a first and a second rope passage at said first end of each said ladder rung, and a third and a fourth rope passage at said second end of each said ladder rung;(b) a first rope passing through said first rope passage at said first end of each said ladder rung and a second rope passing through said second rope passage at said first end of each said ladder rung;(c) a third rope passing through said third rope passage at said second end of each said ladder rung and a fourth rope passing through said fourth rope passage at said second end of each said ladder rung;(d) a first top bracer positioned at said top rung surface of each said ladder rung around said first rope and said second rope at said first end of each said ladder rung, and a second top bracer positioned at said top rung surface of each said ladder rung around said third rope and said fourth rope at said second end of each said ladder rung;(e) a first bottom bracer positioned at said bottom rung surface of each said ladder rung around said first rope and said second rope at said first end of each said ladder rung, and a second bottom bracer positioned at said bottom surface of each said ladder rung around said third rope and said fourth rope at said second end of each said ladder rung;(f) a first top clamp above each said first top bracer at said first end of each said ladder rung holding said first and said second ropes at said first end of each said ladder rung and a first bottom clamp below each said bottom bracer at said first end of each said ladder rung holding said first and said second ropes at said first end of each said ladder rung;(g) a second top clamp above each said top bracer at said second end of each said ladder rung holding said third and said fourth ropes at said second end of each said ladder rung and a second bottom clamp below each said bottom bracer at said second end of each said ladder rung holding said third and said fourth ropes at said second end of each said ladder rung; and(h) wherein said top rung surface and said longitudinally oriented support ribs comprise an integrally molded fiber reinforced plastic mixture including long fiber reinforcing fibers, wherein said long fiber reinforcing fibers of said plastic mixture are oriented lengthwise primarily along the length of said ladder rung surfaces. 2. The rope and ladder rung assembly as recited in claim 1 wherein said fiber reinforced plastic mixture is comprised of long glass fiber to create long glass fiber reinforcement. 3. The rope and ladder rung assembly as recited in claim 1 wherein said fiber reinforced plastic mixture includes a color additive comprising: (a) a suitable base carrier; and(b) a non-organic color pigment. 4. The rope and ladder rung assembly as recited in claim 3 wherein said color additive makes up more than 2% of the total said fiber reinforced plastic mixture. 5. The rope and ladder rung assembly as recited in claim 4 wherein said top rung surface is an integrally molded non-skid surface. 6. A rope ladder assembly comprising: (a) a plurality of longitudinally oriented ladder rungs, each said ladder rung comprising a longitudinally extending top rung surface, a bottom rung surface, a first end, a second end, a plurality of longitudinally extending support ribs, each said support rib having a side profile, a plurality of crossing members providing lateral support to said plurality of support ribs, said crossing members having a side profile height less than a side profile height of said plurality of support ribs, wherein said top rung surface, each said longitudinally extending support rib, and each said crossing member of each said ladder rung are integrally molded fiber reinforced plastic including long fiber reinforcing fibers, and wherein said reinforcing fibers of said fiber reinforced plastic are oriented lengthwise primarily longitudinally along said longitudinally extending top rung surface and said plurality of longitudinally extending support ribs of each said ladder rung;(b) wherein each said ladder rung has a first pair and a second pair of longitudinally spaced apart holes extending through said top surface;(c) a rope extending through each said hole of each said pair of longitudinally spaced apart holes, thereby creating a first pair and a second pair of adjacent said ropes;(d) a plurality of top bracers, a said top bracer from said plurality of top bracers positioned upon each said top rung surface of each said ladder rung and around said first pair of adjacent ropes and around said second pair of adjacent ropes and a plurality of bottom bracers, a said bottom bracer from said plurality of bottom bracers positioned upon each said bottom rung surface of each said ladder rung and around said first pair of adjacent ropes and around said second pair of adjacent ropes;(e) a plurality of top clamps, a said top clamp from said plurality of top clamps positioned upon each said top bracer of said first pair of adjacent ropes holding said ropes of said first pair of adjacent ropes and a said top clamp from said plurality of top clamps positioned upon each said top bracer of said second pair of adjacent ropes holding said ropes of said second pair of adjacent ropes; and(f) a plurality of bottom clamps, a said bottom clamp from said plurality of bottom clamps positioned upon each said bottom bracer of said first pair of adjacent ropes holding said ropes of said first pair of adjacent ropes and a said bottom clamp from said plurality of bottom clamps positioned upon each said bottom bracer of said second pair of adjacent ropes holding said ropes of said second pair of adjacent ropes. 7. The rope ladder assembly as recited in claim 6 wherein said fiber reinforced plastic is a mixture of polyurethane and wherein said reinforcing fibers are long glass fibers. 8. The rope ladder assembly as recited in claim 7 wherein each said support rib of said plurality of longitudinally extending support ribs of said ladder rungs has a side profile that varies along the length of said support rib. 9. The rope ladder assembly as recited in claim 7 wherein said fiber reinforced plastic includes a color additive having a non-organic class of pigment of a desired color. 10. The rope ladder assembly as recited in claim 9 wherein said long glass fibers extend along a length of said ladder rungs. 11. The rope ladder assembly as recited in claim 10 wherein said top rung surface of each said ladder rung has an integrally molded non-skid surface.