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公开(公告)号：US10328294B2
公开(公告)日：2019-06-25
申请号：US15233618
申请日：2016-08-10
申请人： MSA Technology, LLC
发明人： Mitchell H. Hetrich , Mark Hall , Jeffrey Wu , David Bao , James Zhan , Jim Zhan
摘要： A load indicator for use with a fall protection apparatus having a line and a connector for connecting to a user includes a housing having a pass-through opening and a covered indicator region. At least a portion of the housing is configured for connecting to the line. The load indicator also includes a shear pin supported by the housing and extending across the pass-through opening, and a saddle extending across at least a portion of the pass-through opening and supported by at least a portion of the shear pin. The saddle is configured for connecting to at least a portion of the connector. The saddle is movable relative to the housing between a first position and a second position when a force exceeding a predetermined threshold value is applied on the saddle causing the shear pin to shear or break. At least a portion of the indicator region is uncovered in the second position of the saddle when the shear pin shears or breaks.
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公开(公告)号：US10207128B2
公开(公告)日：2019-02-19
申请号：US15392842
申请日：2016-12-28
申请人： MSA Technology, LLC
发明人： Mitchell H. Hetrich
摘要： A fall protection device, including: a housing; a hub rotatable with respect to the housing; a line wrapped around the hub and configured to pay out from and retract into the housing, an engagement mechanism configured to prevent rotation of the hub and further payout of the line; and an adjustment mechanism configured to adjust a length of the line paid out from the housing, the adjustment mechanism comprising: (i) at least one gear attached to the housing; (ii) a pivot having a track configured to interact with the at least one gear and pivot as the at least one gear rotates; and (iii) an arm configured to urge at least a portion of the engagement mechanism causing it to move into an engagement position, to thereby prevent further rotation of the hub and payout of the line from the fall protection device.
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公开(公告)号：US10413761B2
公开(公告)日：2019-09-17
申请号：US15058458
申请日：2016-03-02
申请人： MSA Technology, LLC
发明人： Mitchell H. Hetrich
摘要： A line retraction device includes a rotatable drum having a line associated therewith, with the line including a first end directly or indirectly attached to the drum and a second end opposite the first end, and at least one retraction member biasing the drum in a first rotational direction of the drum opposite a second rotational direction of the drum, where the drum is configured to: (i) retract the line when the drum moves in the first rotational direction; and (ii) payout the line when the drum moves in the second rotational direction. The device further including a damper assembly configured to provide rotational resistance to the drum in: (i) the first rotational direction of the drum as the line is being retracted; and (ii) the second rotational direction as the line is being paid out.
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公开(公告)号：US20230310910A1
公开(公告)日：2023-10-05
申请号：US17710365
申请日：2022-03-31
申请人： MSA Technology, LLC
IPC分类号： A62B35/00
CPC分类号： A62B35/0093
摘要： Systems and methods are provided for a fall limiting device. An embodiment includes a housing and a rotatable drum comprising an axle and two side portions, said rotatable drum comprising a single contiguous material piece. A retractable member is held, at least in part, within the housing via winding around the rotatable drum within the two side portions.
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公开(公告)号：US11191325B2
公开(公告)日：2021-12-07
申请号：US15952809
申请日：2018-04-13
申请人： MSA Technology, LLC
发明人： Mitchell H. Hetrich
摘要： A connection arrangement for use with a wearable body harness has a first connector having a body with a first portion of a locking mechanism and a second connector having a body with a second portion of the locking mechanism. The first portion of the locking mechanism has a tab connected to the body of the first connector and a slot having a first portion extending through the body of the first connector and a second portion extending through the tab. The second portion of the locking mechanism has a tongue configured for being received through the first portion of the slot, and an intermediate connecting element having a first end connected to the body of the second connector and a second end connected to the tongue. The second end of the intermediate connecting element is offset from the body of the second connector.
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公开(公告)号：US20190308041A1
公开(公告)日：2019-10-10
申请号：US16375586
申请日：2019-04-04
申请人： MSA Technology, LLC
摘要： A fall arrest system includes a line retraction device having a safety line, an energy absorber configured for connecting to a terminal end of the safety line, and a harness configured for connecting to the energy absorber such that the energy absorber is disposed between the terminal end of the safety line and the harness. The safety line is selected to have a predetermined mean breaking force with a first standard deviation, and the energy absorber is selected to have a predetermined mean deployment force with a second standard deviation. The mean breaking force of the safety line and the mean deployment force of the energy absorber overlap over an overlapping region of the first and second standard deviation. A ratio of an overlap mean force of the overlapping region to an overlap standard deviation of the overlapping region is less than or equal to 6.
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公开(公告)号：US20190313746A1
公开(公告)日：2019-10-17
申请号：US15952809
申请日：2018-04-13
申请人： MSA Technology, LLC
发明人： Mitchell H. Hetrich
摘要： A connection arrangement for use with a wearable body harness has a first connector having a body with a first portion of a locking mechanism and a second connector having a body with a second portion of the locking mechanism. The first portion of the locking mechanism has a tab connected to the body of the first connector and a slot having a first portion extending through the body of the first connector and a second portion extending through the tab. The second portion of the locking mechanism has a tongue configured for being received through the first portion of the slot, and an intermediate connecting element having a first end connected to the body of the second connector and a second end connected to the tongue. The second end of the intermediate connecting element is offset from the body of the second connector.
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公开(公告)号：US20190070443A1
公开(公告)日：2019-03-07
申请号：US15818110
申请日：2017-11-20
申请人： MSA Technology, LLC
发明人： Mitchell H. Hetrich , Robert Pitt
IPC分类号： A62B35/00
摘要： A connector includes a frame having a first end, a second end, and a pass-through opening extending between the first end and the second end along a longitudinal axis of the frame. The connector further has a gate positioned between the first end and the second end of the frame and movable between a closed position to close the pass-through opening and an open position to open the pass-through opening. A locking mechanism selectively locks the gate in the closed position. The locking mechanism has a rotatable knob connected to at least one of the first end and the second end of the frame and rotatable in a direction about the longitudinal axis, and a locking indent on the gate configured for receiving at least a portion of the rotatable knob when the gate is in the closed position. The rotatable knob is rotationally biased by a biasing mechanism.
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公开(公告)号：US20190069644A1
公开(公告)日：2019-03-07
申请号：US15698264
申请日：2017-09-07
申请人： MSA Technology, LLC
发明人： Mitchell H. Hetrich , Robert Pitt
摘要： A connector includes a frame having a first end, a second end, and a pass-through opening extending between the first end and the second end along a longitudinal axis of the frame. The connector further has a gate positioned between the first end and the second end of the frame and movable between a closed position to close the pass-through opening and an open position to open the pass-through opening. A locking mechanism selectively locks the gate in the closed position. The locking mechanism has a rotatable knob connected to at least one of the first end and the second end of the frame and rotatable in a direction about the longitudinal axis, and a locking indent on the gate configured for receiving at least a portion of the rotatable knob when the gate is in the closed position. The rotatable knob is rotationally biased by a biasing mechanism.
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公开(公告)号：US20170291049A1
公开(公告)日：2017-10-12
申请号：US15233618
申请日：2016-08-10
申请人： MSA Technology, LLC
发明人： Mitchell H. Hetrich , Mark Hall , Jeffrey Wu , David Bao , James Zhan , Jim Zhan
CPC分类号： A62B35/0093 , A62B35/0037 , A62B35/0043 , A62B35/0075 , G01L5/047
摘要： A load indicator for use with a fall protection apparatus having a line and a connector for connecting to a user includes a housing having a pass-through opening and a covered indicator region. At least a portion of the housing is configured for connecting to the line. The load indicator also includes a shear pin supported by the housing and extending across the pass-through opening, and a saddle extending across at least a portion of the pass-through opening and supported by at least a portion of the shear pin. The saddle is configured for connecting to at least a portion of the connector. The saddle is movable relative to the housing between a first position and a second position when a force exceeding a predetermined threshold value is applied on the saddle causing the shear pin to shear or break. At least a portion of the indicator region is uncovered in the second position of the saddle when the shear pin shears or breaks.
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