Safety harnesses are often used to reduce the likelihood of a user experiencing a fall, and/or to safely arrest the user in the event of a fall. Such harnesses are often used in combination with one or more of a self-retracting lifeline (e.g., a personal self-retracting lifeline), an energy-absorbing lanyard, and other fall-protection equipment.
In broad summary, herein is disclosed a support article that is retrofittably attachable to a strap of a fall-protection safety harness. The support article may comprise a main body, first and second upper struts, first and second lower struts, a friction ridge, and at least one connector. These and other aspects will be apparent from the detailed description below. In no event, however, should this broad summary be construed to limit the claimable subject matter, whether such subject matter is presented in claims in the application as initially filed or in claims that are amended or otherwise presented in prosecution.
Like reference numbers in the various figures indicate like elements. Some elements may be present in identical or equivalent multiples; in such cases only one or more representative elements may be designated by a reference number but it will be understood that such reference numbers apply to all such identical elements. Unless otherwise indicated, all figures and drawings in this document are not to scale and are chosen for the purpose of illustrating different embodiments of the invention. In particular the dimensions of the various components are depicted in illustrative terms only, and no relationship between the dimensions of the various components should be inferred from the drawings, unless so indicated. Although terms such as “first” and “second” may be used in this disclosure, it should be understood that those terms are used in their relative sense only unless otherwise noted. As used herein as a modifier to a property or attribute, the term “generally”, unless otherwise specifically defined, means that the property or attribute would be readily recognizable by a person of ordinary skill but without requiring a high degree of approximation.
The following terminology is defined with respect to a fall-protection safety harness as worn by a user standing upright, and to a support article as installed on the harness. It is emphasized that this terminology is used for case of description and does not limit the actual orientation of the harness and items installed thereon during actual use. Terms such as vertical, upward and downward, upper, lower, above, and below, and like terminology, correspond to conventional directions with respect to the Earth when the harness is worn by a user who is standing upright. The upward (u) and downward (d) directions along the vertical axis (v) are denoted in
It will be appreciated that for a support article installed on a generally horizontally-extending elongate strap of a safety harness (e.g. a waist strap), the transverse axis of the article will be aligned with the long (downweb) axis of the strap and the vertical axis of the article will be aligned with the crossweb “width” of the strap. To avoid confusion, the above terms (e.g. vertical and transverse) will be used when referring to a support article as installed on a strap, and the terms downweb and crossweb will be used herein when characterizing the strap itself.
Unless otherwise specified, descriptive terms and terms of distance and dimension when characterizing a support article are defined as follows. The terms gap and ridge refer to entities characterized by a dimension along the above-defined inward-outward direction; the term height denotes the dimensions of such items along this inward-outward direction. The term length denotes the dimension of items along the above-defined vertical direction. In other words, the term height is reserved for dimensions generally along the inward-outward direction, and the term length is reserved for dimensions generally along the vertical direction. The term width is reserved for dimensions generally along the above-defined transverse direction (excepting the crossweb “width” of a strap as noted above).
Fall-protection safety harnesses, some-times referred to as full-body safety harnesses, are widely used in circumstances in which persons are working at elevation or are otherwise at risk of falling. A fall-protection safety harness is configured to serve in combination with a fall-protection device or apparatus such as, e.g., a self-retracting lifeline or horizontal lifeline, a lanyard or the like, to provide fall protection. In ordinary use, at least one such fall-protection device is typically connected to the safety harness, e.g., to a D-ring or other suitable connection point borne by the harness. Fall-protection safety harnesses will be distinguished from, for example, general-use items such as backpacks and the like.
As illustrated in generic representation in
A safety harness 1 often includes first and second (left and right) shoulder straps 2 and 3 that extend over the top of the shoulders and continue generally downward along the upper portion of the wearer's torso; at such locations they may be referred to herein as chest straps (noting that each chest strap is often an uninterrupted continuation of a shoulder strap, as evident from
In some embodiments, harness 1 will also include leg or thigh straps (shown, unnumbered, in
It will be recognized that the exemplary harness as depicted in
Disclosed herein is a support article 20 that can be installed on a strap of a fall-protection safety harness. In many embodiments, a support article 20 may be installed on a so-called waist strap 5 that extends generally horizontally (i.e., along a generally transverse direction as defined above) around the waist/hip area of a user as in the exemplary arrangement of
A main body 21 of a support article 20 is depicted in exemplary embodiment in
In the depicted embodiment and as most easily seen in
In the depicted embodiment, first and second upper struts 31 and 31′ are slightly diverging; that is, they each are oriented at a slight outward angle relative to the vertical axis of main body 21. Accordingly, in this instance, the terminology of a strut extending “generally” along the vertical axis, encompasses arrangements in which the strut may be angled away from the vertical axis as much as 45 degrees. In various embodiments each upper strut may be angled away from the vertical axis by at most 35, 25, 15, or 5 degrees.
As most easily seen in
Upper gap 34 as described above will be configured to receive an upper section of a strap therein when support article 20 is installed onto the strap, as discussed in detail later herein. Accordingly, upper gap 34 will be configured to have an upper gap height 37 (as indicated in
In the depicted embodiment and as most easily seen in
In the depicted embodiment, first and second lower struts 41 and 41′ are oriented substantially parallel to each other rather than at a slight outward angle relative to the vertical axis of main body 21 in the manner of upper struts 31 and 31′. However, in various embodiments, lower struts 41 and 41′ may be outwardly diverging in similar manner to upper struts 31 and 31′; conversely, in some embodiments, upper struts 31 and 31′ may be substantially parallel to each other rather than outwardly diverging. In summary, any such pair of struts may be oriented at any of the above-listed angles relative to the vertical axis of the main body.
As most easily seen in
As seen in
As seen in
In some embodiments, main body 21, first and second upper struts 31 and 31′, first and second lower struts 41 and 41′, and friction ridge 60, may all be integral portions of a single, unitary, integral unit. In many convenient embodiments such a unit may be made of an injection molded organic polymeric material e.g. with all of the above-listed features being formed concurrently in a single injection-molding operation. In various embodiments, main body 21 (and any integral components thereof) may be made of e.g. nylon 6,6 or any other suitable organic polymeric material.
The above-described friction ridge, upper struts, lower struts, the insertion slot between the ends of the upper and lower struts, and the various gaps between the struts and the inward major surface of the main body, are configured to allow a strap to be inserted edgewise into and through the insertion slot so that sections of the strap can enter and reside within the various gaps of the support article main body as the support body is installed onto the strap. This process is illustrated in exemplary, generic representation in
The user may then manipulate strap 5 so that an intermediate section 92 of strap 5 becomes temporarily deformed and deflected inward away from main body 21 (e.g. so that this area of strap 5, when viewed along the downweb axis of strap 5, exhibits a shape somewhat of the form -∧-). This can be continued until trailing edge 99 of strap 5 is in a position that allows it to be inserted into the upper section of insertion slot 50 (i.e., a position just below the lower ends 36 of upper struts 31). The user can then further manipulate strap 5 to urge trailing edge 99 upward so as to enter the above-mentioned upper gap 34 between upper struts 31 and inward major surface 25 of main body 21. The intermediate section 92 can then be pressed outward to undo the temporary deformation, urging trailing edge 99 further upward in the process. This may be continued until trailing edge 99 nears the upper terminus of upper gap 34 (e.g. contacts buttress 28 that supports the upper struts). An upper section 90 of strap 5 will now reside within upper gap 34.
The results of this operation will take the general form shown in
It will be evident e.g. from the side view of
Thus in some embodiments, a lower gap 44 that is defined by upper portions 42 of the first and second lower struts 41 may comprise a lower gap length 48 along the vertical axis of the main body; and, an upper gap 34 that is defined by lower portions 32 of the first and second upper struts 31 may comprise an upper gap length 38 along the vertical axis of the main body, all as visible in
The size (specifically, the length 51, along the vertical axis as illustrated in
The above-disclosed arrangements allow a support article 20 to be installed onto a strap, e.g. a waist strap 5, of a fall-protection safety harness. In various embodiments, such a support article may be installed at the factory, or in the field by an end user or other designated person. It will be appreciated that the herein-disclosed arrangements do not necessitate that a free end of a strap must be obtained and passed through the support article endwise in order to install the support article on the strap. Those skilled in designing safety harnesses will understand that in many safety harnesses, various straps (e.g. a waist strap) are permanently fixed (e.g. by sewing) to other straps or components of the harness so that a free end of the strap is not available to be passed endwise through a support article. The arrangements disclosed herein allow a support article to be installed on any such strap. Such arrangements thus allow a support article to be retrofitted onto an existing safety harness, by which is meant that the support article can be installed onto a safety harness that has already been manufactured and is at or near its final (e.g. ready-for-use) condition.
In some embodiments, the above-discussed arrangements, features and relationships can be configured to enhance the functioning of the support article in particular ways. For example, in some embodiments, the friction ridge, the first and second upper struts, and the first and second lower struts, may be configured so that support article 20, once installed onto strap 5, exhibits little or no tendency to slidably move along the downweb (long) axis of the strap.
Relationships between various parameters may be controlled for such a purpose, based at least in part on arrangements as depicted in exemplary fashion in
The arrangements described above are characterized as forcing strap 5 to follow a sinuous path transversely through support article 20, as in the exemplary depiction of
It will thus be appreciated that the arrangements disclosed herein can allow a support article to be installed (e.g. retrofitted) onto a strap of a safety harness by slidably inserting the strap into gaps provided in the main body of the support article with the slidable movement being edgewise along a crossweb direction of the strap. Once installed, the strap may be substantially unable to move relative to the main body of the support article along a downweb direction (that is, along the long axis) of the strap.
It will also be appreciated that the arrangements disclosed herein can allow a support article 20 to be made with a main body 21 that is quite narrow in the transverse direction. As evident from the exemplary harness depicted in
Various parameters as disclosed herein, and in particular the relationship between various parameters, may be controlled to promote the above-discussed behavior. A first relationship that may be manipulated for this purpose is the height 64 of friction ridge 60 in relation to the gap height 47 of lower gap 44 (as visible in
It is noted that these and other conditions discussed herein do not necessarily require that friction ridge 60 must be continuous along its entire elongate length. Rather, friction ridge 60 may be interrupted at one or more locations (in the extreme, the “ridge” may take the form of a series of posts), as long as sufficient frictional forces are present to achieve the effects disclosed herein.
Other parameters may be established to enhance the effects disclosed herein. As noted earlier, upper portions 42 of first and second lower struts 41 may be transversely spaced apart from each other to define a lower notch 43 therebetween, which notch exhibits a lower notch transverse width 49. Similarly, lower portions 32 of first and second upper struts 31 may be transversely spaced apart from each other to define an upper notch 33 therebetween, which notch exhibits an upper notch transverse width 39. Such arrangements are visible in
Thus in various embodiments, at least at some location on lower portion 62 of friction ridge 60, the transverse width 65 of friction ridge 60 may be at least 5, 10, 15, or 20% of lower notch transverse width 49; in further embodiments, the transverse width 65 of friction ridge 60 may be at most 50, 40, or 30% of lower notch transverse width 49. Similarly, in various embodiments, at least at some location on upper portion 61 of friction ridge 60, the transverse width 65 of friction ridge 60 may be at least 5, 10, 15, or 20% of upper notch transverse width 39; in further embodiments, the transverse width 65 of friction ridge 60 may be at most 50, 40, or 30% of upper notch transverse width 39. By way of a specific example, in the exemplary arrangement shown in
Other parameters may be adjusted in order to promote various features and properties as disclosed herein. For example, in the exemplary design depicted in
It will be appreciated that all such parameters and the relationships between various parameters, can be manipulated to achieve the effects described herein. And, still other parameters may be manipulated to advantage. For example, in some embodiments a lower gap 44, and/or an upper gap 34, may exhibit a gap height that decreases toward the end of the gap. This may have the result that, as the leading edge 98 of strap 5 is urged toward the lower end of lower gap 44, and/or as the trailing edge 99 of strap 5 is urged toward the upper end of upper gap 34, the narrowing of the gap may cause the edge of the strap to become wedged in the narrowing gap. This may further enhance the ability to fix the support article immovably in place on the strap without having to use any kind of latch or clamp.
As mentioned earlier, the straps of a fall-protection safety harness are often comprised of flat webbing, made of, e.g., woven synthetic fabric; such straps are usually flexible but not significantly extensible (elastic). The parameters of any such strap may be chosen so as to perform optimally with the above-described arrangements. For example, in various embodiments a strap onto which a support article is installed may comprise a strap thickness 96 (which, as evident in
In some embodiments, support article 20 may comprise at least one closure member 70 as depicted in exemplary embodiment in
The term “occludes” means that a portion or portions of closure member 70 will physically block or cover the insertion slot 50 to a sufficient extent that strap 5 cannot work its way back out of insertion slot 50 e.g. due to movements, work activities, and the like during ordinary use of the safety harness. It may not be necessary for insertion slot 50 to be fully or completely blocked (although this may occur in some embodiments); rather, slot 50 merely need be blocked or covered to an extent to ensure that strap 5 cannot pass through any remaining area of slot 50 in such manner as might allow strap 5 to exit the main body of the support article.
It will be understood that any such closure member may primarily provide redundancy. That is, the previously-described arrangements can render it unlikely that strap 5 will be able to work loose from the main body of the support article; closure member 70 merely provides an additional level of redundancy in this regard. In many embodiments, strap 5 may not even come into contact with the closure member, or may only come into slight, occasional contact with the closure member, during ordinary use of the harness and support article. It will thus be appreciated that a closure member as defined and described herein is distinguished from a latch or clamp that is closed so as to impinge on a strap (e.g. to press against the strap or pinch the strap) in order to secure the strap within a support article.
The exemplary closure member 70 as depicted in
After the strap has been inserted within the main body 21 as described earlier herein, the distal end of the loop may be manipulated toward the second vertical end (the lower end 23, in the depicted case of
The terminal ends of clastic cord 71 may be connected or attached to the main body 21 in any suitable manner. In the depicted embodiment, cavities 73 are provided on each transverse side of main body 21, as seen e.g. in
In the depicted design, grooves 76 are provided in the upper surface of main body 21 to accommodate the cord portions that reside atop the upper end 22 of main body 21. Grooves 76 wrap around to the inward sides of upper struts 31 (as seen most easily in
If desired, a seating feature (e.g. a groove 77) can be provided along the lower end of lower struts 41 (such a groove may wrap radially around at least a portion of support buttress 29 that supports lower struts 41), as most easily seen in
It is emphasized that the depicted arrangements are exemplary and that there are numerous ways in which one or more closure members may be provided and arranged to perform the desired function. For example, in some embodiments a closure member might take the form of a cover that is hingedly attached to main body 21 or is slidably attached to main body 21. After installation of the support article onto the strap, the cover may be rotated or slidably moved so that is occludes insertion slot 50 to a sufficient extent. In some embodiments, such a closure member may be a separately made article that is hingedly or slidably attached to main body 21. In other embodiments, such a closure member may be an integral part of main body 21, e.g. a cover that is hingedly connected thereto by way of a living hinge. It will thus be understood that the concept of a closure member broadly encompasses any number of arrangements and configurations. Some such arrangements may rely on the collective action of multiple closure members to act in combination to achieve the desired occlusion of insertion slot 50.
Support article 20 will comprise at least one connector that is attached to main body 21 of article 21 and that can be used to support any desired item. Connectors are omitted from various Figures herein in order to more easily show various features of main body 21; however, exemplary connectors are depicted in
A D-ring 81 of the general type described above and depicted e.g. in
As discussed above, in some embodiments a tool anchorage may be provided by an item such as e.g. a D-ring that is made separately from a main body 21 of the support article, and is attached or otherwise permanently joined to the main body to form the anchorage. In other embodiments, a tool anchorage may be incorporated integrally into a main body 21 of a support article. Thus in some embodiments, a main body 21 of support article 20 may take the form of an integral, unitary, molded plastic unit comprised of molded organic polymeric material; in some such cases, the tool anchorage may comprise a member that is molded as an integral part of main body 21 and that defines (at least in part) a through-opening. (Whatever the specific design, a tool anchorage will comprise at least one through-opening whereby a tool can be connected to the anchorage.) In some embodiments, multiple tool anchorages (e.g. one molded-in anchorage, and one D-ring) may be present.
Any such tool anchorage will be configured so that a tool can be temporarily connected to the tool anchorage at least during a time that the tool is actually being used. Thus for example, a tool can be equipped with a tether comprising a connector (e.g. a small carabiner) at the other end of the tether from the tool. The connector can be opened (e.g. a gate of the carabiner can be opened) and a portion of the connector passed through the through-opening of the tool anchorage, after which the connector can be closed so that the tether is secured to the tool anchorage.
Whatever the design, a tool anchorage will be configured so that it can bear the weight of a tool or tools, and so that it can withstand any force that develops if the tool is inadvertently dropped. For example, if a worker is using a tool and accidentally drops it, the tool may fall a distance corresponding to twice the length of the tether (e.g., a distance of up to 2.0 feet, for a 1.0 foot tether). The tool anchorage (and portions of the support article that support the anchorage) will thus be configured so that it can withstand any dynamic forces that develop as a result of the tether arresting the downward motion of the tool, above and beyond forces that result merely from the dead weight of the tool.
Another type of connector 80 is also possible, that can be distinguished from a tool anchorage. Such a connector is exemplified by connector 82 as depicted in
A gear loop 82 may support the dead weight of one or more tools (e.g., up to a total weight of 5 pounds) in similar manner to an above-described tool anchorage. However, a gear loop may be arranged somewhat differently than a tool anchorage, and in some embodiments may be used to complement the use of a tool anchorage. For example, in some common work practices, one or more tools may be connected to a gear loop 82 (e.g. suspended from the gear loop by means of a tool tether) when the tool is not in active use. When the worker desires to use a particular tool, the worker connect the tether of the tool to the tool anchorage in the general manner described above. (In some embodiments, the tool tether can be connected to the tool anchorage while remaining connected to the gear loop, since the flexible cord that provides the gear loop can be manipulated to allow the connector of the tool tether to be brought to the through-opening of the tool anchorage without necessitating that the connector of the tool tether be disconnected from the cord to do this.) When active use of the tool has ended, the tool may be disconnected from the tool anchorage but remain connected to the gear loop.
The above discussions reveal that in at least some embodiments, a gear loop can be arranged differently from a tool anchorage (e.g. it can be provided by an elongate cord) since in at least some work practices, the gear loop is less likely to be tasked with bearing the full dynamic force that can develop in the event of a tool being dropped. However, in some embodiments, a gear loop may be configured to have any suitable strength, e.g. up to and including the strength needed to withstand dynamic forces that result from a tool drop.
The above discussions above make it clear that in various embodiments, a support article may comprise one or more connectors in the form of a tool anchorage and/or one or more connectors that form part of a gear loop. In some embodiments, a support article may comprise at least one tool anchorage and may also bear a connector that forms part of a gear loop (such arrangements are disclosed in the above-mentioned U.S. '608 provisional patent application). It will be appreciated that an arrangement in which two support articles collectively support a gear loop further leverages the advantages allowed by the herein-disclosed arrangements, which can ensure that, in at least some embodiments, any such support article will be substantially immovable along the downweb axis of the strap. As evident from
In some embodiments, a support article 20 may be used to support one or more tools, e.g. a hammer, screwdriver, pliers, or, in general, any of the tools, items, etc. mentioned above. Various tools that may be supported, and ways in which such tools can be configured so as to be connectable to a support article, are disclosed e.g. in the 3M DBI-Sala Fall Protection Full Line Catalogue (2021/2022). It will be understood that all such disclosures are non-limiting. Moreover, support article 20 is not limited to supporting a tool by way of the tool being e.g. directly attached to a connector of the support article. Rather, again as disclosed in the 3M DBI-Sala Fall Protection Full Line Catalog, in some embodiments a support article can have attached thereto, and support, a holder (e.g. a “holster”) that can itself receive and support a tool or any other suitable item (e.g. a flashlight, a cellular telephone, a tape measure, and so on).
Descriptions and characterizations herein have primarily focused on exemplary embodiments in which a support article 20 is mounted on a generally horizontally (transversely) oriented strap such as a waist strap. It is emphasized that all such descriptions are for purpose of description and do not limit the orientations that the harness, strap, and support article may assume during actual wearing of the harness, the performing of work activities, and so on. Moreover, the herein-disclosed support article is not limited to being installed and used only on a generally transversely oriented strap such as a waist strap. Rather, in some embodiments a support article may be installed e.g. on a strap that extends generally vertically (e.g. a chest strap or abdominal strap) or that extends at some angle intermediate between horizontal and vertical. In such cases, the arrangements and characterizations herein can be straightforwardly applied.
For example, if a support article is installed on a generally vertically-oriented strap such as a chest strap, certain characterizations and descriptions presented herein may be re-oriented 90 degrees. (In other words, the “transverse” and “vertical” characterizations may be swapped; the inward-outward direction will remain the same). It is still further noted that a support article need not necessarily have the various struts and so on disposed on the inward side of the support article. Rather, in some embodiments these items may be disposed on the outward side of the article. In such cases, a straightforward swapping of inward and outward will characterize the resulting arrangements. It is noted in passing that in some embodiments, an inward side of the support article, e.g. of the main body thereof, may be equipped with padding or a cushion for enhanced comfort.
A support article as disclosed herein can be used with any suitable fall-protection safety harness. Such harnesses are well known and may be used with a wide variety of fall-protection apparatus and systems. Fall-protection apparatus and systems (e.g. lanyards, self-retracting lifelines, positioning systems, horizontal systems, vertical systems, and so on), fall-protection anchorages, components of such apparatus, systems, equipment, and so on, as well as numerous types of harnesses, any of which the arrangements disclosed herein may be used with, are described in the 3M DBI-SALA Fall Protection Full Line Catalog (2021/2022). Particular fall-protection apparatus such as self-retracting lifelines and components and functioning thereof are described in various aspects in U.S. Pat. No. 7,843,349, 8,256,574, 8,430,206, 8,430,207, and 9,488,235, all of which are incorporated by reference in their entirety herein.
It is emphasized that a user of any fall-protection safety harness that includes a support article as described herein is tasked with carrying out any appropriate steps, actions, precautions, operating procedures, etc., as required by applicable laws, rules, codes, standards, and/or instructions. That is, under no circumstances will the presence of any arrangement disclosed herein relieve a user of the duty to follow all appropriate laws; rules; codes; standards as promulgated by applicable bodies (e.g., ANSI); instructions as provided by the manufacturer of the fall-protection harness, system, apparatus or components; instructions as provided by the entity in charge of a worksite, and so on.
In summary, all variations and combinations are contemplated as being within the bounds of the conceived invention, not merely those representative designs that were chosen to serve as exemplary illustrations. Thus, the scope of the present invention should not be limited to the specific illustrative structures described herein, but rather extends at least to the structures described by the language of the claims, and the equivalents of those structures. Any of the elements that are positively recited in this specification as alternatives may be explicitly included in the claims or excluded from the claims, in any combination as desired. Any of the elements or combinations of elements that are recited in this specification in open-ended language (e.g., comprise and derivatives thereof), are considered to additionally be recited in closed-ended language (e.g., consist and derivatives thereof) and in partially closed-ended language (e.g., consist essentially, and derivatives thereof). Although various theories and possible mechanisms may have been discussed herein, in no event should such discussions serve to limit the claimable subject matter. To the extent that there is any conflict or discrepancy between this specification as written and the disclosure in any document that is incorporated by reference herein but to which no priority is claimed, this specification as written will control.
Filing Document | Filing Date | Country | Kind |
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PCT/IB2022/059244 | 9/28/2022 | WO |
Number | Date | Country | |
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63253231 | Oct 2021 | US | |
63310210 | Feb 2022 | US |