US3879016A - Safety device - Google Patents

Safety device Download PDF

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Publication number
US3879016A
US3879016A US395287A US39528773A US3879016A US 3879016 A US3879016 A US 3879016A US 395287 A US395287 A US 395287A US 39528773 A US39528773 A US 39528773A US 3879016 A US3879016 A US 3879016A
Authority
US
United States
Prior art keywords
cylinder
disk
safety device
shaft
piston
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US395287A
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English (en)
Inventor
Kauko Kankkunen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sisarakenneteollisuus Sirate Oy AB
Original Assignee
Sisarakenneteollisuus Sirate Oy AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sisarakenneteollisuus Sirate Oy AB filed Critical Sisarakenneteollisuus Sirate Oy AB
Priority to US395287A priority Critical patent/US3879016A/en
Priority to FI557/74A priority patent/FI55774A7/fi
Priority to GB37339/74A priority patent/GB1480958A/en
Priority to SE7411289A priority patent/SE383606B/xx
Priority to DE2442690A priority patent/DE2442690A1/de
Application granted granted Critical
Publication of US3879016A publication Critical patent/US3879016A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
    • B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
    • B65H75/34—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables
    • B65H75/38—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables involving the use of a core or former internal to, and supporting, a stored package of material
    • B65H75/44—Constructional details
    • B65H75/4436—Arrangements for yieldably braking the reel or the material for moderating speed of winding or unwinding
    • B65H75/4442—Arrangements for yieldably braking the reel or the material for moderating speed of winding or unwinding acting on the reel
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B1/00—Devices for lowering persons from buildings or the like
    • A62B1/06—Devices for lowering persons from buildings or the like by making use of rope-lowering devices
    • A62B1/08—Devices for lowering persons from buildings or the like by making use of rope-lowering devices with brake mechanisms for the winches or pulleys
    • A62B1/10—Devices for lowering persons from buildings or the like by making use of rope-lowering devices with brake mechanisms for the winches or pulleys mechanically operated

Definitions

  • the cylinder is mounted on a Sing
  • the middle 188/305 295; 192/58 A piston is movable rotationally with the cylinder but is immovable axially.
  • Two other pistons within the re- Reierences Cited spective chamber portions are fixed to the immovable UNITED STATES PATENTS shaft but they are movable axially.
  • the category of safety devices to which the present invention pertains generally includes a rope drum or wheel from which a safety rope. suitably attached to a person or load, is to be discharged.
  • the drum is hydraulically braked so as to bring the load to an extremely small velocity at least by the time the rope has been significantly discharged.
  • Another object of the present invention is to remove the limitation imposed by the length of the cylindrical chamber upon the permissible movement of the rope drum under decelerating conditions.
  • Another object is to eliminate the resistance to unwinding of the rope drum by selectively decoupling the rope drum from the brake cylinder.
  • a further object is to enable selective coupling of the drum and brake cylinder only when emergency conditions exist such that a high degree of braking is required.
  • Another major object is to eliminate the use of valves in the brake cylinder forming part of a safety device.
  • Another object is to utilize the maximum braking force that can be developed by the brake cylinder immediately upon coupling of the cylinder to the revolving rope drum.
  • the primary feature of the invention resides in an arrangement for avoiding the limitation imposed on the permissible extension of the safety rope.
  • This limitation arises from the nature of prior art constructions which involve unidirectional movement of a piston through the length ofa cylindrical chamber. Instead, a piston means is moved axially in a reciprocating manner over a comparatively slight distance within a hollow braking cylinder containing hydraulic fluid.
  • the axially movable piston means is provided with an undulating contour defined by a succession of alternating high and low points and is arranged to respond to alternate driving engagement with complementarily contoured surfaces at opposite ends of the chamber defined within the cylinder.
  • the hydraulic fluid in the chamber offers great resistance to being shifted from one side of the piston means to the other side thereof. This high degree of resistance is achieved by reason of the fact that only slight clearances are defined at the peripheral surfaces of the piston means. As a result. the cylinder movement is effectively braked and the rope drum is brought to an acceptably low velocity.
  • a more specific feature of the invention resides in a particular construction of the hydraulic braking device which includes a plurality of reciprocating pistons usually a pair.
  • the pistons are disposed within the aforenoted hollow cylinder, which is selectively connectable to the rope drum so as to revolve therewith.
  • a disk is located midway longitudinally within the chamber defined by the hollow cylinder, and serves as a partition to divide the chamber into two portions. This disk is pinned to the cylinder for rotational movement therewith, being immovable axially; and the two pistons are disposed respectively in said two chamber portions in relationship to a shaft so as to be immovable rotationally but movable axially on said shaft.
  • a further more specific feature of the present invention resides in the particular configurations for the surfaces or faces of the disk and the several pistons, and also for the corresponding end walls of the cylinder.
  • the disk and the pistons are each propeller-shaped. that is, they are provided with an undulating contour made up of alternating low and high points on each of their faces; similarly the inner end walls of the cylinder are correspondingly contoured or shaped.
  • FIG. 1 is a sectional view taken through the center of the safety device of the present invention.
  • FIG. 2 is a sectional view. particularly illustrating a ratchet-pawl locking mechanism. such viewing being taken on the line 22 of FIG. 1.
  • FIG. 3 is an exploded sectional view of the braking device in accordance with the present invention. particularly illustrating the three pistons involved. as well as the cylinder portions.
  • FIG. 4 is an elevation view taken from the plane 44 in FIG. 3.
  • FIG. 5 is an elevation view of the left piston taken from the plane 5-5.
  • FIG. 6 is an elevation view of the middle piston taken from the plane 66.
  • FIG. 7 is an elevation view of the right piston taken from the plane 77.
  • FIG. 8 is an elevation view of the right cylinder portion taken from the plane 88.
  • FIGS. 1-8 of the drawing there will be seen illustrated a safety device 10 which includes a housing I2 consisting of two parts in the form of covers 12A and 12B.
  • the essential operating components or elements comprise a revolvable rope wheel or drum 14 which is adapted to revolve about a shaft 16 in either a counterclockwise direction. as seen in FIG. 2., so as to discharge a rope 17 or oppositely. that is. clockwise. in order to retract such rope.
  • the shaft 16 is divided into a number of sections for purposes to be explained hereinafter. such sections being of different radial dimensions and of different cross sectional shapes.
  • the largest section is section 16A which is hexagonal in cross section.
  • Sections 168. to the left and right of section 16A. are circular in cross section.
  • sections 16C are square in cross section.
  • Sections 16D are circular in cross section and are suitably threaded for engagement by the nuts 18 provided at either end of the shaft.
  • a hydraulic braking device 20 seen in FIG. I. is adapted to be selectively connected or coupled to the drum I4 by a locking device 22 (FIG. 2). to be described later.
  • the hydraulic braking device includes a cylinder 21 divided into two parts 21A and 21B, these two parts being coupled together by means of the coupling element 24 which is seen in threaded engagement with part 218.
  • the brake cylinder 21 is enabled to rotate about the shaft I6 by reason of the bearings 26 disposed about the shaft sections l6B. these bearings including O-ring seals 28.
  • a ball bearing device 30 is provided for the journaling of the drum 14.
  • cylinder 21 which is filled with oil or other suitable fluid.
  • disk 40 Within cylinder 21, which is filled with oil or other suitable fluid. there are situated a disk 40 and a pair of pistons 42 and 44. These elements are variably spaced from each other. during the braking operation. within the chamber defined by the hollow cylinder. as will be explained hereinafter.
  • the axially movable piston 42 is enclosed within the chamber portion 46A. whereas the axially movable piston 44 is enclosed within the chamber portion 468.
  • the disk 40 is pinned to the cylinder 21 by means of pins 50 which extend into. and are retained in. grooves 52A provided in the cylinder part 21A. grooves 528 provided in the cylinder part 21B.
  • a flange 56 is also provided at the periphery of the piston 40 in order to prevent axial movement of the piston. such flange being adapted to fit into the ap- 5 basementtely located channel 58 in the peripheral wall of the cylinder 21.
  • the rope drum 14 carries the locking mechanism 22.
  • such mechanism comprising a pair of arcuate members 60 which are pivotable about suitable shafts and are secured by nuts 62.
  • Each of the members 60 is provided at one end with a pawl 64 adapted to engage with a ratchet 66 forming an integral part of the cylinder 21.
  • the other ends of the members 60 are spring-biased by means of the springs 66.
  • a more or less conventional spiral spring 70 is utilized to urge the drum 14 in the direction to keep the rope taut; also. to retract the rope after it has been discharged and the load has been removed.
  • the spring is attached at the section 16B of the shaft 16 by the screw 48 which is received in a suitable bore in the shaft; the spring 70 is fastened at its other end to the outstanding fixer 71 on the drum.
  • the rope 17 is paid out or discharged as it is unwound from the drum 14 by way of the opening defined by the grommet or bushing 70.
  • the other end of the rope is fixedly secured to the drum by a suitable shaft '72 around which the rope is looped and then secured by connector 74.
  • the braking cylinder 21 includes a pair of covers or end plates 80 and 82 for the cylinder parts 21A and 218 respectively. These cover plates are adapted to fit around the bearings 26 for rotational movement or revolving of the cylinder 21 around the shaft i6. As has been previously noted, the peripheral wall of the cylinder part 218 includes an outwardly projecting ratchet 66.
  • each of the cover plates 80 and 82 is provided with an undulating contour such that it has alternating high and low points and that the respective surfaces 80A and 80B of these cover plates are displaced in phase by 60.
  • the essential contouring is the same in both instances; however. the orientation is especially adapted to achieve certain effects to be described.
  • FIGS. 4-8 depict phase relationships. depicted by FIGS. 4-8 are estab-' lished.
  • FIGS. 5 and 6 depict opposed faces on the respective piston 42 and disk 40
  • FIGS. 6 and 7 depict like faces on the respective disk 40 and piston 44.
  • the opposed faces on a given disk or piston are of course complementary, that is to say. a low point depicted at a certain location on one face of a given piston corresponds with a high point at the same location on the other face of the same piston.
  • the cusp-shaped recesses 86 immediately adjacent the openings 42A and 44A in the respective pistons 42 and 44 are spaced so as to correspond with the location of the high points on the surfaces of those pistons (which appear in FIGS. 5 and 7). These recesses permit clearance for the bushing 84 so that the complementarily contoured surfaces of the disk 40 and the respective pistons 42 and 44 can entirely abut so that the disk 40 becomes nested with each piston at different points in its rotational movement.
  • the device of the present invention is intended to be used by persons operating at great heights. for example in working on tall buildings or the like.
  • the device 10 is preferably attached by means of the ring 90, to a receptacle permanently fixed to the building.
  • the end of the rope l7 emerging from the lower part of the device 10 is intended to be attached. for example by means of the hook 92. shown in phantom outline in FIG. 2, to the workers safety belt or other equipment.
  • Rotational movement of the cylinder 21 and of the disk or partition 40 results in reciprocating movement along the axis of the shaft 16 for each of the pistons 42 and 44.
  • piston 42 as an example. it will be appreciated from FIGS. 3-8 that the arrangement and the spacing allowed between parts is such within the chamber of the cylinder 21 that the right face of piston 42 is l either completely abutting or contacting the adjacent. complementarily undulating surface of the disk 40 i.e. its left face. which is also complementary to the contour of the end wall 82A. or (2) the left face of piston 42 is completely contacting that end wall or (3) the piston 42 is at an intermediate point along the axis.
  • a disk located midway longitudinally within the chamber defined by said hollow cylinder. said disk serving as a partition to divide said chamber into two portions.
  • a piston means comprising at least two axially movable pistons disposed respectively in said two chamber portions. each of said axially movable pistons having undulating end faces defined by alternating high and low points and each piston being reciprocally movable along the shaft axis responsive to alternate driving engagement with complementarily undulating surfaces at a respective disk face and at a respective opposing surface at one of the end walls of said cylinder.
  • a hydraulic braking device formed by the aforesaid hollow cylinder. said device being selectively connectable to said drum so as to revolve therewith.
  • a safety device as defined in claim 1. in which said disk is secured to said cylinder for rotational movement therewith. said disk being immovable axially.
  • a safety device as defined in claim 1. further including means for selectively connecting said drum and said cylinder so that the two revolve together.
  • a safety device as defined in claim 1. in which said previously recited disk and pistons are propellershaped.
  • each of said disk and pistons is shaped so as to have high and low points on each of its end faces. said faces having complementary symmetry; and in which opposed faces of said disk and an adjacent piston have complementary symmetry.
  • a device as defined in claim 6. further including cover plates for the ends of said cylinder, said cover plates including surfaces with complementary high and low points with respect to the opposed faces of adjacent pistons.
  • a safety device as defined in claim 1. in which each of said axially movable pistons is reciprocally moved in response to alternating driving engagement with a respective end wall of the cylinder and said disk when said cylinder is caused to revolve.
  • a safety device as defined in claim 11 in which said alternating engagement occurs at a 60 rotational phase difference.
  • a safety device as defined in claim 10 in which said disk drivingly engages the two axially movable pistons at a 30 rotational phase difference.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Emergency Lowering Means (AREA)
  • Braking Arrangements (AREA)
US395287A 1973-09-07 1973-09-07 Safety device Expired - Lifetime US3879016A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US395287A US3879016A (en) 1973-09-07 1973-09-07 Safety device
FI557/74A FI55774A7 (enrdf_load_stackoverflow) 1973-09-07 1974-02-26
GB37339/74A GB1480958A (en) 1973-09-07 1974-08-27 Devices comprising braked rope drums for lowering persons or loads
SE7411289A SE383606B (sv) 1973-09-07 1974-09-06 Sekerhetsanordning for nedfirning av personer eller laster
DE2442690A DE2442690A1 (de) 1973-09-07 1974-09-06 Sicherheitsvorrichtung, insbesondere zum herablassen von personen oder lasten aus der hoehe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US395287A US3879016A (en) 1973-09-07 1973-09-07 Safety device

Publications (1)

Publication Number Publication Date
US3879016A true US3879016A (en) 1975-04-22

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Family Applications (1)

Application Number Title Priority Date Filing Date
US395287A Expired - Lifetime US3879016A (en) 1973-09-07 1973-09-07 Safety device

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US (1) US3879016A (enrdf_load_stackoverflow)
DE (1) DE2442690A1 (enrdf_load_stackoverflow)
FI (1) FI55774A7 (enrdf_load_stackoverflow)
GB (1) GB1480958A (enrdf_load_stackoverflow)
SE (1) SE383606B (enrdf_load_stackoverflow)

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4113237A (en) * 1975-10-28 1978-09-12 D. G. Beyer, Inc. Cable tension control
US4173332A (en) * 1976-11-03 1979-11-06 Dulondel Jacques Rotary speed limiter device
US4416351A (en) * 1980-04-29 1983-11-22 Machinefabriek Geurtsen Deventer B.V. Reel for a life-line
US4432437A (en) * 1981-06-10 1984-02-21 Mcclung Thomas E Fire escape system
US4446884A (en) * 1981-06-08 1984-05-08 Rader Jr Homer J Take-up reel with controlled rewind velocity
US4452430A (en) * 1981-03-03 1984-06-05 Kankkunen Matti K Safety device for lowering persons and loads
US4463830A (en) * 1982-02-16 1984-08-07 Machinefabriek Geurtsen Deventer B.V. Reel for a life-line
US4469196A (en) * 1982-09-30 1984-09-04 Charlton Sadler Fire escape device
US4480716A (en) * 1983-06-03 1984-11-06 Soubry Garry V High rise escape device
US4489919A (en) * 1983-03-21 1984-12-25 Meyer Ostrobrod Safety winch with disengageable drive
US4653609A (en) * 1984-11-30 1987-03-31 Devine Millard J Controlled descent apparatus
US6098299A (en) * 1998-04-30 2000-08-08 Keson Industries, Inc. Chalk line holder
KR20010107824A (ko) * 2001-10-22 2001-12-07 조철언 개인용 탈출장비
US6626265B1 (en) 2001-06-29 2003-09-30 Fids, Inc. Controlled descent apparatus
US20050051659A1 (en) * 2003-09-05 2005-03-10 D B Industries, Inc. Self-retracting lifeline
US20080314685A1 (en) * 2005-12-14 2008-12-25 Verstegen Eugene Gijsbertus Ma Devices and Methods For Safely Evacuating an Individual During an Emergency From a Tall Structure
US20110100755A1 (en) * 2009-11-02 2011-05-05 D B Industries, Inc. Brake assembly for a self-retracting lifeline assembly
US20110278095A1 (en) * 2010-05-12 2011-11-17 Hetrich Mitchell H Fall Protection Arrangement
US20120061183A1 (en) * 2010-09-14 2012-03-15 Michael Ralph L Apparatus for safely lowering user from structure
US20120118670A1 (en) * 2010-11-17 2012-05-17 Reliance Industries, Llc Retractable Fall Arrest WIth Component Assembly and Cantilevered Main Shaft
US20130256441A1 (en) * 2010-06-07 2013-10-03 D B Industries, Llc Self-retracting lifeline with disconnectable lifeline
US9121462B2 (en) 2011-10-28 2015-09-01 D B Industries, Llc Self-retracting lifeline
US9174073B2 (en) 2013-02-08 2015-11-03 D B Industries, Llc Energy absorber assembly and components thereof
US20160096048A1 (en) * 2014-10-02 2016-04-07 Honeywell International Inc. Sealed self-retracting lifeline
US20170295755A1 (en) * 2016-04-19 2017-10-19 Kevin A Hill Length Control System and Method
US20180015312A1 (en) * 2015-01-28 2018-01-18 Latchways Plc Energy Absorber Arrangement and Fall Arrest Device
US9968804B2 (en) * 2016-01-14 2018-05-15 Reliance Industries, Llc Nozzle for retractable fall arrest
US10065053B2 (en) 2013-08-05 2018-09-04 Evacuator International Property B.V. Device for evacuating individuals
US20180304105A1 (en) * 2017-04-19 2018-10-25 Auburn University Tactical rope insertion assist device
US10279205B2 (en) * 2017-05-19 2019-05-07 Yoke Industrial Corp. Fall protection device
US20190338593A1 (en) * 2017-07-17 2019-11-07 Safeworks, Llc Integrated climb assist and fall arrest systems and methods
US20200060239A1 (en) * 2016-04-19 2020-02-27 Kevin A. Hill Length Control System and Method

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4448290A (en) * 1981-11-23 1984-05-15 Acushnet Company Safety device for a cable wound drum
DE3512112A1 (de) * 1985-04-03 1986-10-09 Theodor Kromer GmbH & Co KG Spezialfabrik für Sicherheitsschlösser, 7801 Umkirch Federzug

Citations (5)

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US1247094A (en) * 1915-01-14 1917-11-20 Carl Eibye Shock-absorber.
US1813069A (en) * 1924-05-12 1931-07-07 Morgan Blodgett Morgan Inc Shock absorber
US1870871A (en) * 1929-05-09 1932-08-09 Otis K Richard Shock absorber
US2688385A (en) * 1952-12-29 1954-09-07 Mclaughlin William Rotary hydraulic brake machine
US3595528A (en) * 1969-02-25 1971-07-27 Jalmari Selim Virkki Device for lowering persons and loads

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1247094A (en) * 1915-01-14 1917-11-20 Carl Eibye Shock-absorber.
US1813069A (en) * 1924-05-12 1931-07-07 Morgan Blodgett Morgan Inc Shock absorber
US1870871A (en) * 1929-05-09 1932-08-09 Otis K Richard Shock absorber
US2688385A (en) * 1952-12-29 1954-09-07 Mclaughlin William Rotary hydraulic brake machine
US3595528A (en) * 1969-02-25 1971-07-27 Jalmari Selim Virkki Device for lowering persons and loads

Cited By (60)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4113237A (en) * 1975-10-28 1978-09-12 D. G. Beyer, Inc. Cable tension control
US4173332A (en) * 1976-11-03 1979-11-06 Dulondel Jacques Rotary speed limiter device
US4416351A (en) * 1980-04-29 1983-11-22 Machinefabriek Geurtsen Deventer B.V. Reel for a life-line
US4452430A (en) * 1981-03-03 1984-06-05 Kankkunen Matti K Safety device for lowering persons and loads
US4446884A (en) * 1981-06-08 1984-05-08 Rader Jr Homer J Take-up reel with controlled rewind velocity
US4432437A (en) * 1981-06-10 1984-02-21 Mcclung Thomas E Fire escape system
US4463830A (en) * 1982-02-16 1984-08-07 Machinefabriek Geurtsen Deventer B.V. Reel for a life-line
US4469196A (en) * 1982-09-30 1984-09-04 Charlton Sadler Fire escape device
US4489919A (en) * 1983-03-21 1984-12-25 Meyer Ostrobrod Safety winch with disengageable drive
US4480716A (en) * 1983-06-03 1984-11-06 Soubry Garry V High rise escape device
US4523664A (en) * 1983-06-03 1985-06-18 Soubry Garry V Safety descent device
US4653609A (en) * 1984-11-30 1987-03-31 Devine Millard J Controlled descent apparatus
US6098299A (en) * 1998-04-30 2000-08-08 Keson Industries, Inc. Chalk line holder
US6626265B1 (en) 2001-06-29 2003-09-30 Fids, Inc. Controlled descent apparatus
KR20010107824A (ko) * 2001-10-22 2001-12-07 조철언 개인용 탈출장비
WO2005025678A1 (en) 2003-09-05 2005-03-24 D B Industries, Inc. Self-retracting lifeline
US7281620B2 (en) 2003-09-05 2007-10-16 D B Industries, Inc. Self-retracting lifeline
US20050051659A1 (en) * 2003-09-05 2005-03-10 D B Industries, Inc. Self-retracting lifeline
EP1663405B1 (en) * 2003-09-05 2015-06-10 D B Industries, LLC Self-retracting lifeline
US20080314685A1 (en) * 2005-12-14 2008-12-25 Verstegen Eugene Gijsbertus Ma Devices and Methods For Safely Evacuating an Individual During an Emergency From a Tall Structure
US8567562B2 (en) 2009-11-02 2013-10-29 B D Industries, LLC Brake assembly for a self-retracting lifeline assembly
US20110100755A1 (en) * 2009-11-02 2011-05-05 D B Industries, Inc. Brake assembly for a self-retracting lifeline assembly
US20110278095A1 (en) * 2010-05-12 2011-11-17 Hetrich Mitchell H Fall Protection Arrangement
US9199103B2 (en) * 2010-05-12 2015-12-01 Msa Technology, Llc Fall protection arrangement
CN104998356B (zh) * 2010-05-12 2018-07-10 Msa技术有限公司 降落保护装置
CN104998356A (zh) * 2010-05-12 2015-10-28 Msa技术有限公司 降落保护装置
US20130256441A1 (en) * 2010-06-07 2013-10-03 D B Industries, Llc Self-retracting lifeline with disconnectable lifeline
US8925687B2 (en) * 2010-06-07 2015-01-06 D B Industries, Llc Self-retracting lifeline with disconnectable lifeline
US8167090B2 (en) * 2010-09-14 2012-05-01 Michael Ralph L Apparatus for safely lowering user from structure
US20120061183A1 (en) * 2010-09-14 2012-03-15 Michael Ralph L Apparatus for safely lowering user from structure
US20120118670A1 (en) * 2010-11-17 2012-05-17 Reliance Industries, Llc Retractable Fall Arrest WIth Component Assembly and Cantilevered Main Shaft
US8800715B2 (en) * 2010-11-17 2014-08-12 Reliance Industries, Llc Retractable fall arrest with component assembly and cantilevered main shaft
US9121462B2 (en) 2011-10-28 2015-09-01 D B Industries, Llc Self-retracting lifeline
US9151349B2 (en) 2011-10-28 2015-10-06 D B Industries, Llc Centrifugal brake assembly
US10792523B2 (en) 2011-10-28 2020-10-06 3M Innovative Properties Company Centrifugal brake assembly
US9488235B2 (en) 2011-10-28 2016-11-08 D B Industries, Llc Centrifugal brake assembly
US12005276B2 (en) * 2011-10-28 2024-06-11 D B Industries, Llc Centrifugal brake assembly
US20200353298A1 (en) * 2011-10-28 2020-11-12 D B Industries, Llc Centrifugal Brake Assembly
US9889322B2 (en) 2011-10-28 2018-02-13 D B Industries, Llc Centrifugal brake assembly
US10016638B2 (en) 2013-02-08 2018-07-10 D B Industries, Llc Energy absorber assembly and components thereof
US9174073B2 (en) 2013-02-08 2015-11-03 D B Industries, Llc Energy absorber assembly and components thereof
US10065053B2 (en) 2013-08-05 2018-09-04 Evacuator International Property B.V. Device for evacuating individuals
US20200129792A1 (en) * 2014-10-02 2020-04-30 Honeywell International Inc. Sealed self-retracting lifeline
US11938354B2 (en) * 2014-10-02 2024-03-26 Honeywell International Inc. Sealed self-retracting lifeline
US20160096048A1 (en) * 2014-10-02 2016-04-07 Honeywell International Inc. Sealed self-retracting lifeline
US10556138B2 (en) * 2014-10-02 2020-02-11 Honeywell International Inc. Sealed self-retracting lifeline
US20180015312A1 (en) * 2015-01-28 2018-01-18 Latchways Plc Energy Absorber Arrangement and Fall Arrest Device
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Also Published As

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FI55774A7 (enrdf_load_stackoverflow) 1975-03-08
SE7411289L (enrdf_load_stackoverflow) 1975-03-10
GB1480958A (en) 1977-07-27
DE2442690A1 (de) 1975-03-13
SE383606B (sv) 1976-03-22

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