Safety harness

{
  "publication_number": "US6739427B2",
  "country": "US",
  "kind": "B2",
  "title": "Safety harness",
  "abstract": "A safety harness to be worn by a person includes a strap portion for extending over a portion of the person's body to retain the person within the safety harness. At least a section of the strap portion includes an outer shell of a high strength, flexible material. The outer shell has a channel therein. The outer shell can, for example, have a tubular construction. The strap portion further includes a flexible inner member within the channel of the outer shell. The flexible inner member generally prevents the lateral edges of the strap portion from forming a sharp edge when under tension. In that regard, the lateral edges of the strap portion preferably remain blunted, arced or rounded rather than forming a sharp edge when the strap portion is under tension forces experienced in normal use of the safety harness. The rounded or blunted lateral edges of the strap portion reduce or eliminate the binding, pinching and chaffing common with currently available safety harnesses.",
  "claims": [
    "1. A safety harness to be worn by a person, the safety harness comprising: a strap portion for extending over a portion of the person's body to retain the person within the safety harness, at least a section of the strap portion including an outer shell of a high strength, flexible material suitable to withstand forces experienced in a fall, the outer shell having a channel therein, the strap portion further including a flexible inner member within the channel of the outer shell.",
    "2. The safety harness of claim wherein the flexibility of the inner member is limited such that the inner member retains its shape sufficiently to prevent tangling of the strap portion when not in use.",
    "3. The safety harness of claim 1 wherein the inner member is elastic and the length of the tubular outer shell is sufficiently long to allow extension of the strap portion.",
    "4. The safety harness of claim 3 wherein the material of the outer shell has an ultimate tensile strength of at least 4000 pounds.",
    "5. The safety harness of claim 1 wherein the inner member is elastic and the outer member is fabricated from a high strength, elastic material.",
    "6. The safety harness of claim 5 wherein the material of the outer shell has an ultimate tensile strength of at least 4000 pounds and exhibits an elastic extension of at least approximately 3% under a tensile load of approximately 20 pounds.",
    "7. The safety harness of claim 1 wherein the inner member is compressible.",
    "8. The safety harness of claim 1 wherein the inner member exhibits a compression of approximately 25% at an applied pressure in the range of approximately 4 to approximately 10 lb/in 2.",
    "9. The safety harness of claim 1 wherein the inner member exhibits a compression of approximately 50% at an applied pressure in the range of approximately 8 to approximately 20 lb/in 2.",
    "10. The safety harness of claim 1 wherein the inner member maintains a thickness of the strap portion in the region of the lateral edges thereof of at least approximately 0.25 inches when under tension forces experienced in normal use of the safety harness.",
    "11. The safety harness of claim 1 wherein a minimum stiffness for the material of the inner member is defined such that the inner member deflects no more than approximately 0.75 inches when extended over an edge to a distance of approximately 1 inch past the edge and placed under a load of approximately 2 ounces.",
    "12. The safety harness of claim 1 wherein a maximum stiffness for the material of the inner member is defined such that the inner member deflects no more than approximately 0.75 inches when extended over an edge to a distance of approximately 4 inch past the edge and placed under a load of approximately 2 ounces.",
    "13. A safety harness to be worn by a person, the safety harness comprising: a strap portion for extending over a portion of the person's body to retain the person within the safety harness, at least a section of the strap portion including an outer shell of a high strength, flexible material suitable to withstand forces experienced in a fall and a flexible inner member, the flexibility of the inner member being such that the inner member does not substantially interfere with motion of the person when the safety harness is in use but that the strap portion generally retains its shape when the safety harness is not in use.",
    "14. The safety harness of claim 13 wherein the inner member is elastic and the length of the tubular outer shell is sufficiently long to allow extension of the strap portion.",
    "15. The safety harness of claim 14 wherein the material of the outer shell has an ultimate tensile strength of at least 4000 pounds.",
    "16. The safety harness of claim 13 wherein the inner member is elastic and the outer member is fabricated from a high strength, elastic material.",
    "17. The safety harness of claim 14 wherein the material of the outer shell has an ultimate tensile strength of at least 4000 pounds.",
    "18. The safety harness of claim 13 wherein the inner member is compressible.",
    "19. The safety harness of claim 13 wherein the inner member exhibits a compression of approximately 25% at an applied pressure in the range of approximately 4 to approximately 10 lb/in 2.",
    "20. The safety harness of claim 13 wherein the inner member exhibits a compression of approximately 50% at an applied pressure in the range of approximately 8 to approximately 20 lb/in 2.",
    "21. The safety harness of claim 13 wherein a minimum stiffness for the material of the inner member is defined such that the inner member deflects no more than approximately 0.75 inches when extended over an edge to a distance of approximately 1 inch past the edge and placed under a load of approximately 2 ounces.",
    "22. The safety harness of claim 13 wherein a maximum stiffness for the material of the inner member is defined such that the inner member deflects no more than approximately 0.75 inches when extended over an edge to a distance of approximately 4 inch past the edge and placed under a load of approximately 2 ounces.",
    "23. A method of manufacturing a strap for a safety harness for extending over a portion of the person's body to retain the person within the safety harness, the method comprising the step of placing a flexible inner member within an inner channel of an outer shell of a high strength, flexible material suitable to withstand forces experienced in a fall, the flexible inner member generally preventing the lateral edges of the strap portion from forming an edge when under tension, the flexibility of the inner member being such that the inner member does not substantially interfere with motion of the person when the safety harness is in use but that the strap portion generally retains its shape when the safety harness is not in use."
  ],
  "description_excerpt": "The present invention relates to a safety harness and, more particularly, to a safety harness to be worn by a person to protect that person from injury in case of a fall.\n\nSafety harnesses are commonly used as part of a fall protection system for persons subjected to the potential of a fall from a height. In the workplace, full-body safety harnesses are generally used. Such harnesses, which typically include both an upper torso portion (having, for example, shoulder straps) and a lower torso portion (having, for example seat straps and leg straps), can be designed in many alternative manners.\n\nMost currently available full-body safety harnesses are manufactured from relatively inelastic, woven webbing materials such as nylon or polyester. A portion of a harness strap 1 including such a webbing material 2 is illustrated in FIGS. 1A through 1C. Although the strength of such materials is well suited for fall protection, harnesses fabricated from such materials cause discomfort for the user by, for example, impairing movement of the worker and digging into the worker's body at the lateral edges of the straps. In that regard, inelastic webbing material 2 limits the range of motion of the user and has relatively thin, sharp lateral edges 3 and 5 that displace the user's skin and dig into the user's body when under even relatively low tension forces experienced in normal use of a safety harness. The resultant discomfort, reduces effectiveness of the worker and causes relatively quick fatigue. The limited range of motion, discomfort and fatigue associated with current safety harnesses can result in safety lapses by the worker.",
  "cpc": [
    "A62B 35/0018",
    "A62B 35/0031"
  ],
  "ipc": [
    "A62B 35/00"
  ],
  "assignees": [
    "Bacou Dalloz Fall Protection Investment Inc"
  ],
  "inventors": [
    "Joseph F. Gayetty"
  ],
  "filing_date": "2001-02-02",
  "publication_date": "2004-05-25",
  "grant_date": "2004-05-25",
  "priority_date": "2001-02-02",
  "application_number": "US-77574001-A",
  "family_id": "25105345",
  "cited_by_count": 38,
  "citations": [
    "US3805848A",
    "US4034547A",
    "US4147406A",
    "US4228824A",
    "US4278726A",
    "US4298648A",
    "US4878606A",
    "US4640178A",
    "US4679267A",
    "US4852874A",
    "US5050704A",
    "US5197370A",
    "US5436044A",
    "US5564476A",
    "US6006700A",
    "US5857540A",
    "US6057252A",
    "US6239374B1",
    "US6035440A",
    "US6463593B2",
    "WO2002060536A2"
  ]
}