US3309062A - Hydraulic jack with safety means - Google Patents

Hydraulic jack with safety means Download PDF

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Publication number
US3309062A
US3309062A US454367A US45436765A US3309062A US 3309062 A US3309062 A US 3309062A US 454367 A US454367 A US 454367A US 45436765 A US45436765 A US 45436765A US 3309062 A US3309062 A US 3309062A
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US
United States
Prior art keywords
jack
nut
cylinder
hydraulic
inlet
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
US454367A
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English (en)
Inventor
Jansz Joost Werner
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.)
Richard Costain Ltd
Original Assignee
Richard Costain Ltd
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 Richard Costain Ltd filed Critical Richard Costain Ltd
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Publication of US3309062A publication Critical patent/US3309062A/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/46—Combinations of several jacks with means for interrelating lifting or lowering movements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
    • B66F3/25—Constructional features
    • B66F3/30—Constructional features with positive brakes or locks
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/35—Extraordinary methods of construction, e.g. lift-slab, jack-block
    • E04B1/3511—Lift-slab; characterised by a purely vertical lifting of floors or roofs or parts thereof
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/14—Conveying or assembling building elements
    • E04G21/16—Tools or apparatus
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/14—Conveying or assembling building elements
    • E04G21/16—Tools or apparatus
    • E04G21/163—Jacks specially adapted for working-up building elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/02—Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member
    • F15B15/06—Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member for mechanically converting rectilinear movement into non- rectilinear movement
    • F15B15/061—Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member for mechanically converting rectilinear movement into non- rectilinear movement by unidirectional means

Definitions

  • the present invention relates to hydraulic jack of which the distance through which the jack is raised can be accurately controlled, and is particularly suitable for use where the jack has to perform precise lifting steps, for example in raising a building structure by a plurality of jacks which have to be operated in a manner which will maintain the building structure substantially upright while it is being raised.
  • the present invention consists in a hydraulic jack wherin a nut, rotatably mounted on a screw thread provided on the jack piston rod or a rod movable therewith, is turned by a pawl and ratchet mechanism or the like actuated by an auxiliary hydraulic device which is hydraulically connected with the jack cylinder so that, as the jack is raised, the nut is turned so that it bears against a part which is fixed relative to the jack cylinder, the movement of the pawl and ratchet mechanism actuating means for controlling the stroke of the jack.
  • the means controlling the strokeof the jack conveniently comprise one or more electric switch means which cooperate with the pawl and/ or the ratchet to control a valve regulating the supply of hydraulic fluid to the jack.
  • the nut As the nut continuously bears against the jack cylinder or a part which is fixed relative thereto, the nut also serves as a locking device which safeguards the jack against untimely lowering in the event of failure of the hydraulic pressure.
  • FIGURE 1 shows schematically a longitudinal section of a hydraulic jack according to the invention.
  • FIGURE 2 is a fragmentary plan view, on a larger scale, taken on line IIII in FIGURE 1.
  • the hydraulic jack 1 shown comprises a work-cylinder 2 in which slides a piston 3 secured to a piston rod 4.
  • the jack 1 is of the angle-acting type, liquid under pressure for lifting the load being supplied to one side 5 of the piston 3 from a source 6 through pipes 7, 8.
  • the piston rod 4 is provided with a screw thread on which is threaded a nut 9.
  • the nut 9 is movable by auxiliary mechanism which controls the jack stroke, consisting of ratchet teeth 10 provided around the nut 9 and cooperating with a pawl 11, which is actuated by an auxiliary liquid-actuated single-acting cylinder 12 provided with a piston 13.
  • auxiliary mechanism which controls the jack stroke, consisting of ratchet teeth 10 provided around the nut 9 and cooperating with a pawl 11, which is actuated by an auxiliary liquid-actuated single-acting cylinder 12 provided with a piston 13.
  • a common control valve 16 provides for simultaneous supply of pressure liquid from source 6 through pipes 7 and 8 to the jack cylinder 2, and through pipes 7 and 15 to the auxiliary cylinder 12.
  • the control valve 16 is actuated by electrical switches 17, 18 which respectively cooperate with the pawl 11.
  • the switch 17 is actuated by pawl 11 which latter effects a change over of control valve 16 whereby the pressure liquid is directed into a return conduit and the pressure in pipes 7, 8 and 15 is released.
  • the return movement of the pawl 11 and the piston 13 is effected mechanically by a compression spring 19 which may, for example, be incorporated in the cylinder 12.
  • the switch 18 is actuated by the pawl 11 and changes over the control valve 16 to its previous position whereupon pressure can again be built up in pipes 7, 8. 15.
  • the nut 9 acts as a locking nut and effects a follow-up movement during the jack stroke by the operation of the auxiliary mechanism whereby to control of the jack stroke, and applies itself against the jack cylinder jacket 2 so that the jack 1, whatever be its position is safeguarded from untimely return if the pressure in the system should fail for any reason.
  • a switch as shown at 20 may be used, which is actuated by the angular displacement of the teeth 10 on the nut 9, for example actuated by the respective tips of the teeth to provide a jack stroke corresponding to the rotation of the nut 9 by the pitch of one tooth, or a combination of both switches 17 and 20 is possible, switch 17 then providing an additional safety function.
  • the jack cylinder 2 is connected via a non-return valve 21 with pipes 7, 8 and 15, whereby upon release of the pressure in pipes 7, 8 and 15 the auxiliary piston 13 is allowed to return while the pressure in the jack cylinder 2 is maintained.
  • a switch 22 acts as a safety contact for ensuring firm application of locking nut 9 against the jack cylinder jacket 2.
  • the jack 1 is provided with a relief system (not shown) and means, such as a worm wheel may be provided on a zone of the periphery of nut 9 whereby the nut 9 may be turned backwards, for example by means of a worm fixed in a hand drilling machine or the like, for lowering the jack.
  • the auxiliary mechanism for controlling the jack stroke described above is actuated hydraulically and mechanically. It could also be operated entirely hydraulically by using an auxiliary cylinder 12 which is double-acting.
  • hydraulic jacks may act as a system, with each jack in the system having its individual supply of pressure liquid, and all electrical switch means 18 actuated by the return of the auxiliary pistons being connected in series, so that in all jacks the building up of the pressure in the pipes 7, 8 and 15 starts simultaneously.
  • the jacks which may be hydraulically independent and subject to diflerent loads, at exactly the same average lifting speed.
  • Hydraulic jack comprising a jack cylinder having an inlet for hydraulic pressure fluid, a piston movable in said cylinder, a nut rotatably mounted on a screw thread provided on a rod movable with the piston, drive means for turning said nut, as the jack is raised, in a direction to urge the nut against a part which is fixed relative to the cylinder, means for interrupting the supply of hydraulic pressure fluid to said inlet, and means responsive to the turning of the nut through an angle corresponding to a predetermined increment of lift for actuating said interrupting means to interrupt the supply of hydraulic pressure fluid to said inlet.
  • a jack as claimed in claim 1, wherein said drive means comprises a pawl cooperating with ratchet teeth associated with the nut, and an auxiliary hydraulic motor connected to the supply of hydraulic pressure fluid to the jack cylinder inlet, said auxiliary hydraulic motor being connected to drive the pawl to turn the nut when hydraulic fluid pressure is supplied thereto and to the jack cylinder inlet, and means for moving the auxiliary 3 hydraulic motor and the pawl in the reverse direction when the supply of hydraulic pressure fluid is interrupted.
  • a jack as claimed in claim 2 including at least one electric switch means cooperating with the pawl and rat tribend connected to actuate a control valve in a supply pipe through which hydraulic pressure fluid is supplied to said jack-cylinder inlet and to said auxiliary hydraulic motor.
  • valve is connected between. said supply pipe and the 10 OTHELL M. SIMPSON, Examiner.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • General Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Fluid Mechanics (AREA)
  • Actuator (AREA)
  • Types And Forms Of Lifts (AREA)
  • Accommodation For Nursing Or Treatment Tables (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
US454367A 1964-05-08 1965-05-10 Hydraulic jack with safety means Expired - Lifetime US3309062A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6405158A NL6405158A (enrdf_load_stackoverflow) 1964-05-08 1964-05-08

Publications (1)

Publication Number Publication Date
US3309062A true US3309062A (en) 1967-03-14

Family

ID=19790044

Family Applications (2)

Application Number Title Priority Date Filing Date
US454367A Expired - Lifetime US3309062A (en) 1964-05-08 1965-05-10 Hydraulic jack with safety means
US537975A Expired - Lifetime US3396944A (en) 1964-05-08 1966-03-28 Jacking systems for use in the construction of buildings

Family Applications After (1)

Application Number Title Priority Date Filing Date
US537975A Expired - Lifetime US3396944A (en) 1964-05-08 1966-03-28 Jacking systems for use in the construction of buildings

Country Status (9)

Country Link
US (2) US3309062A (enrdf_load_stackoverflow)
AT (1) AT286551B (enrdf_load_stackoverflow)
CH (1) CH444423A (enrdf_load_stackoverflow)
DK (1) DK111636C (enrdf_load_stackoverflow)
ES (1) ES312682A1 (enrdf_load_stackoverflow)
FI (1) FI46053C (enrdf_load_stackoverflow)
GB (1) GB1102274A (enrdf_load_stackoverflow)
NL (1) NL6405158A (enrdf_load_stackoverflow)
NO (1) NO118871B (enrdf_load_stackoverflow)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3519246A (en) * 1968-06-28 1970-07-07 Hartley Belding Hoisting unit
US3710690A (en) * 1970-11-16 1973-01-16 Gen Motors Corp Accelerator
US4014519A (en) * 1976-01-30 1977-03-29 Fmc Corporation Hydraulic jack with mechanical locking device
US4865293A (en) * 1987-05-08 1989-09-12 Kayaba Kogyo Kabushiki Kaisha Hydraulic jack
US20140061560A1 (en) * 2011-05-06 2014-03-06 Melchor Gabilondo, S.A. Hydraulic jack with locking
US20150224967A1 (en) * 2014-02-12 2015-08-13 Rodney Lee Rensink Trailer Jack
US20160075540A1 (en) * 2014-09-17 2016-03-17 Actuant Corporation Portable self-locking lift system
USD765339S1 (en) 2014-09-17 2016-08-30 Actuant Corporation Base member of a portable lift system
US9568029B2 (en) 2010-12-22 2017-02-14 Actuant Corporation Hydraulic cylinder position sensing and locking system and corresponding method
US9574613B1 (en) * 2014-06-23 2017-02-21 Stephen A. Youngers Machine leveling pedestal

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE363798C (sv) * 1972-05-04 1976-09-27 D V H Johansson Anordning for att stegvis lyfta laster, spec. stora laster
US4251974A (en) * 1979-04-25 1981-02-24 Peter M. Vanderklaauw Sensing and control apparatus for lifting heavy construction elements
SE417082B (sv) 1979-07-05 1981-02-23 Resmastservice Ab Anordning for att stegvis lyfta laster, speciellt stora laster, med hjelp av en eller flera domkrafter
DE3333292A1 (de) * 1983-09-15 1985-04-18 Walter 7290 Freudenstadt Finkbeiner Gleichlaufvorrichtung fuer hebeboecke
US4832315A (en) * 1988-03-01 1989-05-23 Vanderklaauw Peter M System for synchronized lifting of heavy building elements
US4942701A (en) * 1989-07-24 1990-07-24 Complete Hydraulic Building Systems, Inc. Hydraulic winch system for use in erecting clear-span, pole-type buildings
US5970665A (en) * 1996-10-02 1999-10-26 Oudman; Jack A. System and method for maintaining a building a structure in a level condition
CN1080801C (zh) * 1996-10-07 2002-03-13 邓庚厚 一种由上往下建造建筑物的顶升式建筑法
US6860068B2 (en) * 2001-06-26 2005-03-01 John J. Halloran Potential energy storage system
US7392624B2 (en) * 2003-02-05 2008-07-01 Dwight Eric Kinzer Modular load-bearing structural column
RU2333884C1 (ru) * 2006-12-29 2008-09-20 Государственное образовательное учреждение высшего профессионального образования "Пермский государственный технический университет" Домкрат
TWI663378B (zh) * 2018-07-27 2019-06-21 鄭振廷 逆打鋼柱垂直校位裝置
US11346099B2 (en) * 2018-12-31 2022-05-31 Independence Materials Group, Llc Apparatus and method for lifting a concrete slab
SE544032C2 (en) * 2019-08-14 2021-11-09 I & P I Norr Ab An adjustment system, and adjustable support, a method of orienting an element, and use of such system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1223621A (en) * 1916-07-24 1917-04-24 Charles F Scherenzel Lifting-jack.
US2201189A (en) * 1937-12-01 1940-05-21 Makaroff Pneumatic automobile lift
US2875980A (en) * 1954-06-25 1959-03-03 Grace Karl Truck raising and supporting mechanism
US3104593A (en) * 1960-12-28 1963-09-24 Regent Jack Mfg Co Inc Fluid actuators

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2975560A (en) * 1955-09-22 1961-03-21 Lloyd H Leonard Method of and apparatus for lifting pre-formed slabs
US3036816A (en) * 1956-03-20 1962-05-29 Allan H Stubbs Apparatus for lift-slab building construction
US3201088A (en) * 1961-11-13 1965-08-17 Internat Lift Slab Corp System for elevating building components
US3327997A (en) * 1965-02-16 1967-06-27 Zetco Engineering And Tool Com Sensing apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1223621A (en) * 1916-07-24 1917-04-24 Charles F Scherenzel Lifting-jack.
US2201189A (en) * 1937-12-01 1940-05-21 Makaroff Pneumatic automobile lift
US2875980A (en) * 1954-06-25 1959-03-03 Grace Karl Truck raising and supporting mechanism
US3104593A (en) * 1960-12-28 1963-09-24 Regent Jack Mfg Co Inc Fluid actuators

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3519246A (en) * 1968-06-28 1970-07-07 Hartley Belding Hoisting unit
US3710690A (en) * 1970-11-16 1973-01-16 Gen Motors Corp Accelerator
US4014519A (en) * 1976-01-30 1977-03-29 Fmc Corporation Hydraulic jack with mechanical locking device
US4865293A (en) * 1987-05-08 1989-09-12 Kayaba Kogyo Kabushiki Kaisha Hydraulic jack
US9568029B2 (en) 2010-12-22 2017-02-14 Actuant Corporation Hydraulic cylinder position sensing and locking system and corresponding method
US20140061560A1 (en) * 2011-05-06 2014-03-06 Melchor Gabilondo, S.A. Hydraulic jack with locking
US9278837B2 (en) * 2011-05-06 2016-03-08 Melchor Gabilondo, S.A. Hydraulic jack with locking
US20150224967A1 (en) * 2014-02-12 2015-08-13 Rodney Lee Rensink Trailer Jack
US9574613B1 (en) * 2014-06-23 2017-02-21 Stephen A. Youngers Machine leveling pedestal
US20160075540A1 (en) * 2014-09-17 2016-03-17 Actuant Corporation Portable self-locking lift system
USD765339S1 (en) 2014-09-17 2016-08-30 Actuant Corporation Base member of a portable lift system
US10173872B2 (en) * 2014-09-17 2019-01-08 Actuant Corporation Portable self-locking lift system

Also Published As

Publication number Publication date
FI46053C (fi) 1972-12-11
DK111636B (enrdf_load_stackoverflow) 1968-09-23
FI46053B (enrdf_load_stackoverflow) 1972-08-31
ES312682A1 (es) 1965-12-16
AT286551B (de) 1970-12-10
CH444423A (fr) 1967-09-30
US3396944A (en) 1968-08-13
GB1102274A (en) 1968-02-07
NL6405158A (enrdf_load_stackoverflow) 1965-11-09
NO118871B (enrdf_load_stackoverflow) 1970-02-23
DK111636C (da) 1968-09-23

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