US3849834A - Lockable hinge joint - Google Patents

Lockable hinge joint Download PDF

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Publication number
US3849834A
US3849834A US00330900A US33090073A US3849834A US 3849834 A US3849834 A US 3849834A US 00330900 A US00330900 A US 00330900A US 33090073 A US33090073 A US 33090073A US 3849834 A US3849834 A US 3849834A
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United States
Prior art keywords
arm
locking
release lever
peripheral edge
joint
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Expired - Lifetime
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US00330900A
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English (en)
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O Mayer
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Individual
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Individual
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Priority claimed from DE19722206681 external-priority patent/DE2206681C3/de
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    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
    • E05D11/00—Additional features or accessories of hinges
    • E05D11/10—Devices for preventing movement between relatively-movable hinge parts
    • E05D11/1028—Devices for preventing movement between relatively-movable hinge parts for maintaining the hinge in two or more positions, e.g. intermediate or fully open
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
    • E05D11/00—Additional features or accessories of hinges
    • E05D11/08—Friction devices between relatively-movable hinge parts
    • E05D11/081—Friction devices between relatively-movable hinge parts with both radial and axial friction, e.g. conical friction surfaces

Definitions

  • a hinge joint having two arms rotatable about a common axis is lockable in at least one predetermined position.
  • the apparatus includes a locking ratchet engaging locking detents formed on the peripheral edge of one of the arms.
  • a spring tensions the ratchet towards the locking detents.
  • a release lever tensioned against an arm side, rotates about the common axis.
  • Said lever includes a cam profile substantially eccentric in relation to its center and rises to a first release face ending at a high point outside said peripheral edge. It then slopes downward forming a blocking sector.
  • the blocking sector is substantially concentric and slightly below said peripheral edge.
  • the cam profile then turns inward forming a second release face finally droping downward to form abutting surface.
  • a stop bar positioned within one of the rotational arms confines rotation of the release'lever.
  • the locking ratchet engages the detents according to the relative position of said release lever about the common axis so as to lock the joint arm.
  • this invention relates to a rotatable hinge joint capable of being locked in at least one predetermined position by the engagement of a locking ratchet or blade in locking slots located on the peripheral edge a of an arm within the joint.
  • the locking ratchet is urged against the slot or detents by means of a tensioning spring.
  • a release lever positioned concentrically about the common axis regulates the positioning of the locking blade relative to the slots.
  • the release lever comprises a unique cam profile for removing and blockingthe locking ratchet as the lever or the arms or both rotate. This is accomplished at appropriate points in the revolution of one arm relative to the other. Joints of this kind are used, for example, in collapsible baby carriages, in adjustable chain backs, in camp beds, in folding ladders as well as in multi-purpose step ladders.
  • the present invention overcomes the aforementioned disadvantages by providing a lockable hinge joint having a releasing lever with a unique cam profile disposed on its periphery.
  • a locking ratchet thrusts against the peripheral edge of one arm forming the joint.
  • Locking detents or slots are placed on the peripheral edge.
  • a releasing lever including the cam profile either allows or blocks engagement of said locking ratchet in the detents.
  • the apparatus is such that at appropriate positions the movement of said release lever tion with its cam profile allows unlocking of the apparatus and advancement to the next predetermined position.
  • an additional cam profile has been placed on the periphery of the joint arm so as to control the sequence of lockable positions.
  • the present invention deletes the separate unlocking mechanisms of prior apparatus replacing it with a spring-loaded ratchet.
  • This ratchet or blade either follows the release cam profile or the peripheral edge of the arm during appropriate points in the travel of one arm relative to the other.
  • the profile of the release lever is such that at predetermined angles the locking ratchet engages the locking slots or detents.
  • said cam becomes a blocking sector mandat ing a predetermined sequence of positions in opening the arms. This opening sequence locks the arms in the customary A-frame step ladder configuration.
  • the cam arrangement permits a straight line ex-
  • a further embodiment of the present invention equips the peripheral edge of the arm with three locking positions and-without a cam profile on its periphery.
  • the spring-loaded ratchet urging against the high rotation of the arms until the pivoting arm engages the release lever handle as the apparatus is shut.
  • FIG. 1 shows a folded lockable hinge according to the present invention in cross section adapted for use as a ladder hinge
  • FIG. 2 shows the hinge of FIG. 1 in its first open position
  • FIG. 3 shows the hinge of FIG. 2 wherein the release cam profile engages the spring-loaded locking blade, said blade being removed from one of the locking detents;
  • FIG. 4 shows the hinge of FIG. 3 in its extended position wherein the releasing cam permits the locking blade to engage a locking detent and where said cam begins to lift said blade;
  • FIG. 5 shows the hinge of FIG. 4 removing of the locking blade from its slot wherein said lever abuts against a travel stop
  • FIG. 6 shows the hinge according to FIG. 5 wherein a cam profile on the periphery of the joint arm permits overriding a portion of the release cam as the rotating arm assumes an intermediate position;
  • FIG. 7 is another embodiment of the present invention having three lockable positions and showing the hinge rotating between two locking detents, and;
  • FIG. 8 is a cross section taken along the line XII-XII of FIG. 7.
  • Said joint comprises a first arm 10 and a second arm 12 wherein each of said arms comprises respective cross pieces 10a and 12a. Each cross piece having respective sides 10b and 12b. These pieces are easily formed, for example, by stamping or casting.
  • the a lower ends 100 and 120 bend inwards resulting in a substantially closed cross section.
  • the two joint arms pivot about common axial pin 14.
  • the pin support structure of arm 10 is integrally formed by extending the two parallel sides 10b of arm 10 in a concentric disc-shaped array as indicated in FIG. 1.
  • the bearing support structure of arm 12 integrally forms sides 12b of arm 12 in a parallel about pin 14.
  • the width of the pin support of arm 12 is narrow enough to pivot within the array as defined by side members 10b of arm 10.
  • Each of the parallel sides 12b contain correlative detents or locking slots 1 through 4.
  • support discs 12d strengthen the pin supports so that members 12d lie concentric about pin 14 while having the same detent structure as their associated arm members 12b.
  • side members b of arm 10 flare outwardly forming guide 16 for positioning ratchet locking or bolt 18 radially from the periphery of pin support extension of 12b.
  • the flaring comprising guide 16 reaches toward the pivot pin 14 permitting the locking ratchet 18 to engage the various detents 1-4.
  • Support 22 is bent inwardly and perpendicular from the longitudinal axis of arm 10b as shown in FIG. 8.
  • Support 22 contains an aperture 24 slidably supporting guide post 26 which on one end is fastened to locking blade 18.
  • Tensioning spring 28 abuts against one side of stop 22 while on the other tensions blade 18 radially against the periphery of pin support 12b.
  • Spacer 36 mounts about pin 14 and is concentric therewith.
  • release lever 138 mounts about spacer 36 so that it freely rotates. Thus, the movement of release lever 138 is independent of the movement of arm 12.
  • Hand grip 40 extends from release lever 138 so that on closing the hinge, grip 40 positions itself between arms 10 and 12 as seen in FIG. 1.
  • spring 154 tensions the release lever 138 against re-enforcing structure 12d and joint arm 12b.
  • release lever 138 includes cam surfaces 184, 142, 150, 145 and 142'.
  • the peripheral edge 125 of the pin support of 12b comprises detent structures 1, 2, 3 and 4. Detents l, 2 and 3 being cut so as to closely follow the outline of locking blade 18. Each detent or slot is angularly disposed on edge 125 providing lockable positioning of arm 12 when release lever 138 allows locking blade 18 to engage the detents.
  • detents l, 2 and 3 provide various operating positions of the lockable hinge.
  • Detent 4 as shown in FIGS. 1 and 2 comprise an inclined slope 4 joining abutment face 4" allowing arm 12 to rotate into a closed position.
  • FIG. 1 the hinge is shown in its folded position.
  • locking blade 18 abuts against detent face 4" and rides on detent floor 4.
  • a force in the direction of arrow C causes arm 12 to rotate as shown while locking ratchet 18 rides on floor 4.
  • release lever 138 maintains its position relative to arm 10 owing to the abutment of locking ratchet bolt 18 against release face 142".
  • the continuing rotation of arm 12 places detent 1 under ratchet 18 where tensioning spring 128 urges said ratchet into this detent as shown in FIG. 2.
  • the impinging locking ratchet l8 urges against cam surface 142" causing a torque about pivot pin 14 rotating release lever 138 and its protruding handle 40 against joint arm 10.
  • the locked A-frame step ladder configuration of FIG. 2 is achieved.
  • release lever handle 40 urges control surface 142" of release lever 138 to push radially outward against ratchet 18. This displacement causes ratchet 18 to ride on slope 142" to cam high point 145.
  • FIG. 3 shows removal of blade 18 from detent 1 thereby freeing arm 12.
  • FIG. 3 indicates blade 18 exerting a force against the descending surface adjacent to high point 145. This force exhibits a torque about pin 14 urging release lever 138 and its integrally formed protruding arm 40 against arm 12.
  • Cam profile having a slightly smaller radius than peripheral edge 125 of the pin support of 12b allows locking bolt 18 to rest against edge 125 as arm 12 rotates in direction E as shown.
  • Locking ratchet 18 has rounded surfaces denying engagement of the tip of said ratchet in detent structure existing above profile 150. As shown in FIG. 3 arm 12 freely rotates in direction E. Spring 15 causes frictional engagement of release lever 138 maintaining its position relative to rotation of arm 12 while ratchet 18 rides peripheral edge 125.
  • a force on release handle 40 in the direction F as shown causes rotation of release cam 138 until cam surface 184 engages stop 182.
  • This action releases locking ratchet l8 and joint arm 12 again freely rotates.
  • arm 12 can rotate in direction G as shown.
  • This rotation causes a co-relative rotation of release lever 138 wherein blade 18 follows the higher cam profile 131 integrally formed on the periphery of the pin support of 12b thereby overriding release cam point 145.
  • rotating arm 12 in the direction G as shown causes ratchet 18 to engage detent 2.
  • Blade I8 engaging detent 2 locks arm 12 in an intermediate elbow position suitable for scaffolding. It is to be noted that the unique application of the aforementioned cam surfaces provides for the overriding of detent 2 when the lockable joint is open from its folded position.
  • FIG. 6 shows that a force in a direction indicated by arrow H (of FIG. 5) rotates release lever 138 causing lever surface 142" to exhibit a force outwardly and radially against locking ratchet 18. This displaces said ratchet from engagement with locking detents 2.
  • FIG. 6 shows that rotation of release cam 138 causes abutment of grip handle 40 against the inside surface of arm 12.
  • R0- tating arm 12 in the direction I as shown blocks the insertion of blade 18in detent l.
  • the hinge closes as cam slope 142 guides locking ratchet 18 adjacent to stop surface 4". The sequence of locking steps beings again as shown in FIG. 1 and above described.
  • FIG. 7 Another embodiment according to the present invention is shown in FIG. 7. As suggested locking detents 2 and 3 are positioned on the periphery of pin support of 12b.
  • the operation of the invention shown in FIG. 7 proceeds as described above through FIG. 4.
  • a clockwise rotation of handle 40 causes abutment of release cam profile 184 against stop 182.
  • Rotating arm 12 in direction K as shown causes the inside face to contact handle 40. This urges co-relative rotation of the arm and lever.
  • Ratchet 18 slides down release profile 142 entering detent 4 as shown, closing the apparatus.
  • a joint having two arms pivotable about a common axis and lockable with respect to each other in at least one predetermined angular position comprising:
  • a release lever pivotable about the common axis releative to the arms and having a cam profile including an eccentric portion in relation to its center and rising toa first release face to a high point outside said peripheral edge, a blocking sector portion following the high point and substantially concentric and slightly below said peripheral edge, a second release face following the blocking sector portion, and an abutting surface for confining the rotation of said release lever;
  • stop means positioned in the second arm for limiting the movement of said release lever relative to the second arm so that the travel of said release lever ends when the abutting surface strikes said stop means preventing the cam high point from engaging said locking means when an unlocking action is performed by said second release face.
  • a guide integrally formed within the first arm and directed radially towards said peripheral edge
  • means for frictionally coupling comprises a rotatable bushing disposed about the common axis, and spring means for biasing said release lever against the inside of the second arm.
  • said biasing means comprises a tension spring urging said ratchet towards said peripheral edge.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pivots And Pivotal Connections (AREA)
US00330900A 1972-02-11 1973-02-09 Lockable hinge joint Expired - Lifetime US3849834A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722206681 DE2206681C3 (de) 1971-02-11 1972-02-11 Verriegelbares Gelenk

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US3849834A true US3849834A (en) 1974-11-26

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US00330900A Expired - Lifetime US3849834A (en) 1972-02-11 1973-02-09 Lockable hinge joint

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US (1) US3849834A (xx)
BE (1) BE818838A (xx)
CA (1) CA990023A (xx)
FR (1) FR2171732A5 (xx)

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3893206A (en) * 1974-04-10 1975-07-08 Ferro Mfg Corp Seat reclining assembly
US4109344A (en) * 1976-07-19 1978-08-29 Julius Blum Gesellschaft M.B.H. Hinge with closing means
WO1980001493A1 (en) * 1979-01-11 1980-07-24 A Solberg Ratchet device,especially for awnings
US4576411A (en) * 1984-02-02 1986-03-18 Tachikawa Spring Co., Ltd. Vehicle seat
US5647601A (en) * 1995-02-06 1997-07-15 Potter; Michael D. Collapsible infant stroller adapter
AU749138B2 (en) * 1998-01-05 2002-06-20 Benq Mobile Gmbh & Co. Ohg Bearing arrangement
US6591533B2 (en) 2001-08-15 2003-07-15 Blackpoint Engineering, Llc Locking hinge
US20040129497A1 (en) * 2002-05-28 2004-07-08 Yoram Weiss Ladder assemblies
US20040140156A1 (en) * 2002-11-11 2004-07-22 Moss Newell R. Combination ladders, ladder components and methods of manufacturing same
US20050164530A1 (en) * 2004-01-26 2005-07-28 Yates Alan G. Test socket
US20060218750A1 (en) * 2005-03-31 2006-10-05 Hideya Tajima Biaxial hinge device of electrical equipment
US20070045466A1 (en) * 2005-08-31 2007-03-01 Hellis Neil C Foldable, lockable control surface and method of using same
US20100196628A1 (en) * 2008-12-10 2010-08-05 Shooley Bruce A Invertible Christmas tree
WO2015165465A1 (en) * 2014-04-28 2015-11-05 Skov A/S Valve unit, a method of opening and closing such a valve unit and use of such a valve unit
JP2016516952A (ja) * 2013-03-28 2016-06-09 マイクロソフト テクノロジー ライセンシング，エルエルシー 回転可能な部品取付けのためのヒンジ機構
EP2861455B1 (de) 2012-06-18 2017-10-04 CYBEX GmbH Kindersitz oder babyschale zur anbringung auf einem kraftfahrzeugsitz
US9987995B2 (en) 2015-01-21 2018-06-05 Ranger Design Ladder storing and releasing assembly
US10037057B2 (en) 2016-09-22 2018-07-31 Microsoft Technology Licensing, Llc Friction hinge
USD833643S1 (en) 2017-07-07 2018-11-13 Tricam Industries, Inc. Integrated ladder tray hook
US10344797B2 (en) 2016-04-05 2019-07-09 Microsoft Technology Licensing, Llc Hinge with multiple preset positions
US10487580B2 (en) 2013-01-18 2019-11-26 Suzhou Dongrun Ladder Co., Ltd. Thick plate type joint lock for ladder connection
US10606322B2 (en) 2015-06-30 2020-03-31 Microsoft Technology Licensing, Llc Multistage friction hinge
US10638866B2 (en) 2008-12-10 2020-05-05 Balsam International Unlimited Company Invertible Christmas tree
USD935055S1 (en) 2019-08-07 2021-11-02 Tricam Industries, Inc. Hinge for a multi-position ladder
US11509259B2 (en) * 2016-10-31 2022-11-22 Shenzhen Kuang-Chi Space Tech. Co., Ltd. Plate folding and unfolding device and solar panel structure

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US9870066B2 (en) 2012-03-02 2018-01-16 Microsoft Technology Licensing, Llc Method of manufacturing an input device
US9075566B2 (en) 2012-03-02 2015-07-07 Microsoft Technoogy Licensing, LLC Flexible hinge spine
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US9426905B2 (en) 2012-03-02 2016-08-23 Microsoft Technology Licensing, Llc Connection device for computing devices
USRE48963E1 (en) 2012-03-02 2022-03-08 Microsoft Technology Licensing, Llc Connection device for computing devices
US9134807B2 (en) 2012-03-02 2015-09-15 Microsoft Technology Licensing, Llc Pressure sensitive key normalization
US8873227B2 (en) 2012-03-02 2014-10-28 Microsoft Corporation Flexible hinge support layer
US20130300590A1 (en) 2012-05-14 2013-11-14 Paul Henry Dietz Audio Feedback
US10031556B2 (en) 2012-06-08 2018-07-24 Microsoft Technology Licensing, Llc User experience adaptation
US9019615B2 (en) 2012-06-12 2015-04-28 Microsoft Technology Licensing, Llc Wide field-of-view virtual image projector
US8964379B2 (en) 2012-08-20 2015-02-24 Microsoft Corporation Switchable magnetic lock
US9317072B2 (en) 2014-01-28 2016-04-19 Microsoft Technology Licensing, Llc Hinge mechanism with preset positions
US10120420B2 (en) 2014-03-21 2018-11-06 Microsoft Technology Licensing, Llc Lockable display and techniques enabling use of lockable displays
US10324733B2 (en) 2014-07-30 2019-06-18 Microsoft Technology Licensing, Llc Shutdown notifications
US9424048B2 (en) 2014-09-15 2016-08-23 Microsoft Technology Licensing, Llc Inductive peripheral retention device
US9447620B2 (en) 2014-09-30 2016-09-20 Microsoft Technology Licensing, Llc Hinge mechanism with multiple preset positions
US9752361B2 (en) 2015-06-18 2017-09-05 Microsoft Technology Licensing, Llc Multistage hinge

Citations (4)

* Cited by examiner, † Cited by third party
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US2594533A (en) * 1950-01-03 1952-04-29 Craig C Baker Locking hinge
US2812961A (en) * 1955-06-21 1957-11-12 A J Hosmer Corp Prosthetic locking hinge
US3304107A (en) * 1961-08-05 1967-02-14 Bahmuller Wilhelm Adjustable joint, especially for chairs, beds, cots, and the like
US3643292A (en) * 1968-08-23 1972-02-22 Otto Mayer Automatically interlockable hinge fitting

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2594533A (en) * 1950-01-03 1952-04-29 Craig C Baker Locking hinge
US2812961A (en) * 1955-06-21 1957-11-12 A J Hosmer Corp Prosthetic locking hinge
US3304107A (en) * 1961-08-05 1967-02-14 Bahmuller Wilhelm Adjustable joint, especially for chairs, beds, cots, and the like
US3643292A (en) * 1968-08-23 1972-02-22 Otto Mayer Automatically interlockable hinge fitting

Cited By (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3893206A (en) * 1974-04-10 1975-07-08 Ferro Mfg Corp Seat reclining assembly
US4109344A (en) * 1976-07-19 1978-08-29 Julius Blum Gesellschaft M.B.H. Hinge with closing means
WO1980001493A1 (en) * 1979-01-11 1980-07-24 A Solberg Ratchet device,especially for awnings
US4576411A (en) * 1984-02-02 1986-03-18 Tachikawa Spring Co., Ltd. Vehicle seat
US5647601A (en) * 1995-02-06 1997-07-15 Potter; Michael D. Collapsible infant stroller adapter
AU749138B2 (en) * 1998-01-05 2002-06-20 Benq Mobile Gmbh & Co. Ohg Bearing arrangement
US6591533B2 (en) 2001-08-15 2003-07-15 Blackpoint Engineering, Llc Locking hinge
US7424933B2 (en) 2002-05-28 2008-09-16 Norman Miller Ladder assemblies
US20040129497A1 (en) * 2002-05-28 2004-07-08 Yoram Weiss Ladder assemblies
US20040140156A1 (en) * 2002-11-11 2004-07-22 Moss Newell R. Combination ladders, ladder components and methods of manufacturing same
US7364017B2 (en) 2002-11-11 2008-04-29 Wing Enterprises, Inc. Combination ladder, ladder components and methods of manufacturing same
US20080257645A1 (en) * 2002-11-11 2008-10-23 Wing Enterprises, Inc. Combination ladder, ladder components and methods of manufacturing same
US8376087B2 (en) 2002-11-11 2013-02-19 Wing Enterprises, Inc. Combination ladder, ladder components and methods of manufacturing same
US8069948B2 (en) 2002-11-11 2011-12-06 Wing Enterprises, Inc. Combination ladder, ladder components and methods of manufacturing same
US7101209B2 (en) * 2004-01-26 2006-09-05 Gold Technologies, Inc. Test socket
US20050164530A1 (en) * 2004-01-26 2005-07-28 Yates Alan G. Test socket
US20060218750A1 (en) * 2005-03-31 2006-10-05 Hideya Tajima Biaxial hinge device of electrical equipment
US7478458B2 (en) * 2005-03-31 2009-01-20 Katoh Electrical Machinery Co., Ltd. Biaxial hinge device of electrical equipment
US20070045466A1 (en) * 2005-08-31 2007-03-01 Hellis Neil C Foldable, lockable control surface and method of using same
US8062718B2 (en) 2008-12-10 2011-11-22 Schooley Bruce A Invertible christmas tree
US20100196628A1 (en) * 2008-12-10 2010-08-05 Shooley Bruce A Invertible Christmas tree
US11730298B2 (en) 2008-12-10 2023-08-22 Balsam International Unlimited Company Invertible Christmas tree
US10925426B2 (en) 2008-12-10 2021-02-23 Balsam International Unlimited Company Invertible Christmas tree
US10682003B2 (en) 2008-12-10 2020-06-16 Balsam International Unlimited Company Collapsible artificial tree
US10638866B2 (en) 2008-12-10 2020-05-05 Balsam International Unlimited Company Invertible Christmas tree
EP2861455B1 (de) 2012-06-18 2017-10-04 CYBEX GmbH Kindersitz oder babyschale zur anbringung auf einem kraftfahrzeugsitz
US10487580B2 (en) 2013-01-18 2019-11-26 Suzhou Dongrun Ladder Co., Ltd. Thick plate type joint lock for ladder connection
JP2016516952A (ja) * 2013-03-28 2016-06-09 マイクロソフト テクノロジー ライセンシング，エルエルシー 回転可能な部品取付けのためのヒンジ機構
WO2015165465A1 (en) * 2014-04-28 2015-11-05 Skov A/S Valve unit, a method of opening and closing such a valve unit and use of such a valve unit
US9987995B2 (en) 2015-01-21 2018-06-05 Ranger Design Ladder storing and releasing assembly
US10606322B2 (en) 2015-06-30 2020-03-31 Microsoft Technology Licensing, Llc Multistage friction hinge
US10344797B2 (en) 2016-04-05 2019-07-09 Microsoft Technology Licensing, Llc Hinge with multiple preset positions
US10037057B2 (en) 2016-09-22 2018-07-31 Microsoft Technology Licensing, Llc Friction hinge
US11509259B2 (en) * 2016-10-31 2022-11-22 Shenzhen Kuang-Chi Space Tech. Co., Ltd. Plate folding and unfolding device and solar panel structure
USD833643S1 (en) 2017-07-07 2018-11-13 Tricam Industries, Inc. Integrated ladder tray hook
USD935055S1 (en) 2019-08-07 2021-11-02 Tricam Industries, Inc. Hinge for a multi-position ladder

Also Published As

Publication number Publication date
CA990023A (en) 1976-06-01
FR2171732A5 (xx) 1973-09-21
BE818838A (fr) 1974-12-02

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