US3851856A - Shoring jacking - Google Patents

Shoring jacking Download PDF

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Publication number
US3851856A
US3851856A US00256731A US25673172A US3851856A US 3851856 A US3851856 A US 3851856A US 00256731 A US00256731 A US 00256731A US 25673172 A US25673172 A US 25673172A US 3851856 A US3851856 A US 3851856A
Authority
US
United States
Prior art keywords
cylinder
piston
collar
shoring
surface profiles
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
US00256731A
Other languages
English (en)
Inventor
H Berg
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.)
BERG MARY 33320 BOURQUIN CRESCENT
HB CONTRACTING
Original Assignee
HB CONTRACTING
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 HB CONTRACTING filed Critical HB CONTRACTING
Priority to US00256731A priority Critical patent/US3851856A/en
Priority to AU54130/73A priority patent/AU467065B2/en
Priority to GB1903073A priority patent/GB1403466A/en
Priority to JP48057904A priority patent/JPS5038402B2/ja
Application granted granted Critical
Publication of US3851856A publication Critical patent/US3851856A/en
Assigned to BERG,MARY 33320 BOURQUIN CRESCENT reassignment BERG,MARY 33320 BOURQUIN CRESCENT ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: H.B. CONTRACTING LTD.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
    • B66F3/247—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated pneumatically actuated
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00—Excavations; Bordering of excavations; Making embankments
    • E02D17/06—Foundation trenches ditches or narrow shafts
    • E02D17/08—Bordering or stiffening the sides of ditches trenches or narrow shafts for foundations
    • E02D17/083—Shoring struts
    • 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
    • E04G25/00—Shores or struts; Chocks
    • E04G25/04—Shores or struts; Chocks telescopic
    • E04G2025/047—Shores or struts; Chocks telescopic which telescoping action effected by a piston

Definitions

  • a jack consisting of a piston and cylinder unit which can be expanded by introduction of compressed gas into the cylinder so as to engage two opposed surfaces to be shored.
  • a rotatable collar is mounted on the end of the cylinder receiving the piston and is provided with inclined cam profiles which when rotated engage a pin located in a diametric pair of holes provided in the piston. The collar can be locked against rotation when the cam profiles are in engagement with the pin so as to prevent retraction of the piston and cylinder unit from the shored surfaces if pressure is lost or released from the cylinder.
  • the invention relates to shoring jacks of the kind comprising a piston and cylinder, particularly for the use in shoring trench walls.
  • the invention therefore provides a shoring jack comprising a piston and cylinder unit for location between two surfaces to be shored, the cylinder of said unit having inlet means for connection to a pressure source for expanding the unit into engagement with said surfaces, a collar mounted for rotation on the end of said cylinder receiving said piston, said collar having an end extending axially from said cylinders to surround the piston and being formed with an inclined circumferentially extending cam profile, means for releasably securing the collar against rotation relative to the cylinder, a cam element, and means for selectively locating said cam element at one of a plurality of positions along said piston for cooperating engagement with the cam profile, whereby, subsequent to pressurization of the cylinder, the jack can be retained in the resulting expanded condition by securing the cam on the piston adjacent to the cam profile, rotating the collar to bring the cam profileinto abutment with the cam element, and securing the collar against rotation relative to the cylinder to prevent the cam profile from disengaging from the cam element.
  • FIG. 1 is an exploded view of a jack according to the invention.
  • FIG. 2 is a perspective view of one element of the jack of FIG. 1 and,
  • FIG. 3 is a side elevation showing the jack of FIG. 1 assembled and in use in a trench.
  • the jack 1 comprises a cylinder 2 having a bearing plate 3 closing one end and a gas inlet connector 4 secured in the cylinder wall close to the bearing plate. Vent holes 5 are provided in the wall of the cylinder 2 approximately three quarters of the length of the cylinders from the bearing plate 3.
  • a piston 6 is similarly closed at one end by a bearing plate 3. At its other end, the piston 6 is closed by an end wall 7 to which a rubber sealing cup 8 is secured by a bolt 9 extending through a retainer disc 10.
  • the piston 6 is tubular and along its length is formed with pairs of diammetrically opposed holes 11 in which a pin 12 may be located.
  • the bearing plates 3 are each 6 provided with adjustable set screws 3a for engagement with the shoring boards when the jack is in use, to prevent slippage.
  • a cylindrical collar 13 is provided through which the piston 6 may be introduced into the cylinder 2.
  • One end of the collar 13 has a portion 14 of enlarged diameter extending to a step 15, the end 16 of the cylinder 2 being a slip fit into the portion 14 to abut the step 15.
  • a threaded boss 17 is provided in the wall of the portion 14, with a threaded stud 18 being engaged in this boss.
  • the boss 18 carries a handle 19 whereby. the stud can be tightened into engagement with the cylinder 2 to prevent relative rotation of the collar 13 relative to the cylinder.
  • the handle 19 also carries a flange 20 which retains one end of a chain 21.
  • the pin 12 is secured to the other end of the chain 21.
  • the other end of the collar 13, as best seen in FIG. 2, is formed with a pair of symmetrical inclined circumferential camming surfaces 22 each extending through substantially and each terminating in stop faces 23 and 24 at their upper and lower ends respectively.
  • the jack is assembled by introducing the piston 6 through the collar 13 in the position shown in FIG. 1 and so that the cup 8 enters the cylinder 2. The jack is then collapsed until the end of the cylinder 2 bears on the step 15 and the piston is fully received in the cylinder.
  • FIG. 3 shows the jack in position in a trench supporting shoring boards 25.
  • the inlet connector 4 is first connected to the source of compressed gas 26 which may for example be CO through a pressure pipe 27 having a valve 28 therein.
  • Valve 28 is opened to introduce gas under pressure into the cylinder 2 so that the piston extends until the bearing plates 3 bear against the shoring 25.
  • the set screws 3a bite into the wood of the shoring boards to prevent any vertical movement of the jack. 1
  • the pin 12, which serves as a camming element, is then inserted through the pair of diametric holes 11 in the piston 6 which are nearest to the stop surfaces 24 at the lower ends of the inclined cams 22 on the collar 13.
  • the collar 13 is then rotated until the inclined cams 22 are in firm abutting engagement with the pin and the collar is then locked by rotating the handle 19 to engage the stud 18 with the cylinder 2.
  • the stop faces 23 prevent the pin 12 from overriding the ends of the camming surfaces 22 during rotation of the collar 13. Pres- V sure can then be released from the cylinder 2 by closing the valve 28 and removing the connector 27.
  • the jack is held in the extended position by the abutment of the pin 12 with the cam surfaces.
  • vent holes 5 provided in the wall of the cylinder 2 vent the gas from the cylinder 2 as soon as the piston 6 is ejected from the cylinder sufficiently far for the cup 8 to pass beyond the holes 5. As a result, no further extension of the jack takes place.
  • a pneumatic jack for use in the shoring of trenches, comprising a piston and cylinder unit having a port for separately operable mechanical means engageable between the piston and cylinder for the secural and retention thereof against retraction from a random expanded condition, wherein said mechanical means comprises a collar formed with an internal annular step and rotatably engaging the end of said cylinder receiving said piston, said collar having an end extending axially from said cylinder to surround the piston, said end being formed with a pair of inclined circumferential surface profiles, each extending through substantially 180,
  • the abutting element can be located on the piston adjacent to the surface profiles and the collar rotated to bring the surface profiles into abutting engagement with the abutting element without further extension of the unit, and then secured.
  • a pneumatic jack as claimed in claim 1, wherein said means for selectively locating said cam element comprise a plurality of axially spaced diametric holes formed in said piston, said abutting element comprising a pin engageable selectively in any of said holes.
  • a pneumatic jack as claimed in claim 1 wherein said cylinder is formed with a plurality of circumferentially spaced vent holes to prevent extension of the jack beyond a predetermined amount 5.
  • a pneumatic jack as claimed in claim 1 wherein the piston and cylinder unit is provided with a bearing plate at each end, each of said bearing plates including means for penetrative engagement with said shoring boards.
  • a pneumatic jack for use in the shoring of trenches comprising a cylinder having a bearing plate at a closed first end for engagement with a shoring board lining a wall of a trench to be shored, and a port for the introduction and release of gas under pressure,
  • valve means connected to said port
  • a piston having another bearing plate at a first end for engagement with another shoring board lining an opposite wall of the trench to be shored, and a sealing cup secured at a second end which is received in the open second end of the cylinder, said piston being further provided with a plurality of axially spaced pairs of diametric holes,
  • bearing plates being formed with threaded apertures each receiving axially adjustable set screws for penetrative engagement with said shoring boards
  • a collar formed with a threaded radial aperture, and having an internal step engaging the second end of said cylinder, said collar being rotatable with respect to said cylinder, and having an axially extending end surrounding said piston and formed with a pair of symmetrical surface profiles each extending through substantially a threaded stud provided with a handle and engaging in said threaded radial aperture in said collar for releasably securing the collar against rotation relative to said cylinder, and
  • the piston and cylinder can be secured in the resulting extended condition and the valve means operated to release the gas under pressure after locating the pin in a pair of said holes ad jacent to the surface profiles, rotating the collar to bring the surface profiles into abutment with the pin without further extending the piston and cylinder, and securing the collar against rotation by tightening the threaded stud against the cylinder so as to prevent the surface profiles from disengaging from the pin.
  • line 3 should read: --a piston and cylinder unit having a port for the introduction and release of gas under pressure,-.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Structural Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
US00256731A 1972-05-25 1972-05-25 Shoring jacking Expired - Lifetime US3851856A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US00256731A US3851856A (en) 1972-05-25 1972-05-25 Shoring jacking
AU54130/73A AU467065B2 (en) 1972-05-25 1973-04-05 Shoring jack
GB1903073A GB1403466A (en) 1972-05-25 1973-04-19 Shoring jack
JP48057904A JPS5038402B2 (en]) 1972-05-25 1973-05-25

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00256731A US3851856A (en) 1972-05-25 1972-05-25 Shoring jacking

Publications (1)

Publication Number Publication Date
US3851856A true US3851856A (en) 1974-12-03

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ID=22973370

Family Applications (1)

Application Number Title Priority Date Filing Date
US00256731A Expired - Lifetime US3851856A (en) 1972-05-25 1972-05-25 Shoring jacking

Country Status (3)

Country Link
US (1) US3851856A (en])
JP (1) JPS5038402B2 (en])
GB (1) GB1403466A (en])

Cited By (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4058983A (en) * 1976-02-09 1977-11-22 Griswold James L Trench shoring assembly with lifting attachment
US4591298A (en) * 1984-06-20 1986-05-27 Japan Speed Shore Co., Ltd. Expansion beam for shoring up sand guards
US4660806A (en) * 1985-09-12 1987-04-28 Masters Scott A Push stick for plumb and line adjustment of stud walls
US4682914A (en) * 1985-12-23 1987-07-28 Isamu Aihara Hydraulic trench support
US4787781A (en) * 1987-05-14 1988-11-29 Walter Lipscomb Shoring device
AU603455B2 (en) * 1987-06-23 1990-11-15 Polyform Pty. Ltd. Flexible load cell
EP0477451A1 (en) * 1990-09-28 1992-04-01 Speed Shore Corporation New and improved shoring shield
US5232312A (en) * 1992-04-24 1993-08-03 Jennings Charles B Shoring device
US5310290A (en) * 1993-03-12 1994-05-10 Spencer Dennis I Protective structure for excavations
US5499890A (en) * 1994-07-08 1996-03-19 Americ Corporation Trench shoring device with locking mechanism
US5513555A (en) * 1994-01-21 1996-05-07 Michael J. Plank Quick-release cam lock with locking pin
US5868060A (en) * 1994-01-24 1999-02-09 Speed Shore Corp. Quick-release cam lock
US6017170A (en) * 1998-06-01 2000-01-25 American Rescue Technologies, Inc. Adjustable self locking shoring strut
US6027102A (en) * 1997-04-21 2000-02-22 Krupa; Richard P. Hydraulic jack stand
US6039522A (en) * 1999-01-19 2000-03-21 Kinedyne Corporation Automatic locking and unlocking shoring bar
US6158705A (en) * 1999-04-09 2000-12-12 Airshore International Direct Equipment West Ltd. Vehicle Stabilization and support tool
US6379084B1 (en) * 1999-12-17 2002-04-30 Jack Kennedy Metal Products And Buildings, Inc. Mine stopping
US6585231B1 (en) * 2002-06-12 2003-07-01 Anthony R. Fratoni, Jr. Pneumatic jack
US6616133B1 (en) * 2001-07-18 2003-09-09 Norgren Automotive, Inc. Linear actuator having an adjustable piston rod
US6682263B2 (en) 1999-12-17 2004-01-27 Jack Kennedy Metal Products & Buildings, Inc. Multiple tier stopping and method of constructing stopping
US6746183B1 (en) * 2002-09-23 2004-06-08 James G. Sullivan Shoring device with outer ratcheting collar
US6821057B1 (en) 2000-04-05 2004-11-23 Maksim Kadiu Magnetic shoring device
US6846132B2 (en) 2002-02-01 2005-01-25 Jack Kennedy Metal Products & Buildings, Inc. Mine stopping and braces therefor
RU2274594C1 (ru) * 2004-11-30 2006-04-20 Евгений Антонович Сеноедов Конвейер пластинчатый передвижной с изменяемой высотой подъема
US7048471B2 (en) 2000-04-05 2006-05-23 Maksim Kadiu Shoring device
US7056067B2 (en) 2003-10-03 2006-06-06 Max Kadiu Trench shoring device
US20070264089A1 (en) * 2006-05-12 2007-11-15 Mccracken Robert Stackable concrete forming apparatus components
US7309190B1 (en) * 2002-09-23 2007-12-18 Sullivan James G Shoring device with removable swivel side plates containing detente sphere attachments
US20090058117A1 (en) * 2007-09-05 2009-03-05 Tandemloc, Inc. Load Spreader Bar System
US20090101774A1 (en) * 2007-10-23 2009-04-23 Lung Ching Shih Prop
WO2009077793A1 (en) * 2007-12-14 2009-06-25 Petar Kunic Improved structure of hydraulic sheeting support
US7837413B1 (en) * 2008-01-23 2010-11-23 Kundel Sr Robert Adjustable trench box and spreader bar
NL2004821C2 (nl) * 2010-06-04 2011-12-06 Holmatro Ind Equip Inrichting met een cilinder, zoals een spreidvijzel.
US20120080579A1 (en) * 2010-10-03 2012-04-05 Gray Manufacturing Company Inc. Air-assisted heavy equipment support stand
US8616519B2 (en) 2010-08-23 2013-12-31 Titan Formwork Systems, Llc Shoring post with supplemental beam support
US8662476B2 (en) 2011-01-31 2014-03-04 Weddle Tool Company Post ram
US9132993B1 (en) 2014-07-03 2015-09-15 Tandemloc, Inc. Load spreader bar pipe connecting sleeve with offset end plate

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57270B2 (en]) * 1974-07-01 1982-01-06
JPS5640799Y2 (en]) * 1976-07-05 1981-09-24
US4581979A (en) * 1983-07-01 1986-04-15 Automotive Products Plc Shipping and installation restraining clip for master cylinder input member
GB2190962A (en) * 1986-05-30 1987-12-02 Marco Romeo Sarra Lifting jacks
CN112681139B (zh) * 2020-12-17 2022-04-15 何陆灏 一种土木工程安全施工砂箱装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1590830A (en) * 1924-03-20 1926-06-29 Jewkes Spencer Pneumatic lifting jack
US2691503A (en) * 1950-03-18 1954-10-12 Goodman Mfg Co Mine prop
FR1445633A (fr) * 1965-06-01 1966-07-15 Devin & C Lemarchand F Procédé et dispositif pour le serrage temporaire des étaiements de fouille
US3321182A (en) * 1965-03-26 1967-05-23 Walker Neer Mfg Co Combination hydraulic jack and load holding mechanism
US3393521A (en) * 1966-11-02 1968-07-23 Francis S. Cammisa Excavation shoring frame assemblies
US3470699A (en) * 1968-05-16 1969-10-07 Andrew J Cox Safety device for trenches and the like

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1590830A (en) * 1924-03-20 1926-06-29 Jewkes Spencer Pneumatic lifting jack
US2691503A (en) * 1950-03-18 1954-10-12 Goodman Mfg Co Mine prop
US3321182A (en) * 1965-03-26 1967-05-23 Walker Neer Mfg Co Combination hydraulic jack and load holding mechanism
FR1445633A (fr) * 1965-06-01 1966-07-15 Devin & C Lemarchand F Procédé et dispositif pour le serrage temporaire des étaiements de fouille
US3393521A (en) * 1966-11-02 1968-07-23 Francis S. Cammisa Excavation shoring frame assemblies
US3470699A (en) * 1968-05-16 1969-10-07 Andrew J Cox Safety device for trenches and the like

Cited By (50)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4058983A (en) * 1976-02-09 1977-11-22 Griswold James L Trench shoring assembly with lifting attachment
US4591298A (en) * 1984-06-20 1986-05-27 Japan Speed Shore Co., Ltd. Expansion beam for shoring up sand guards
US4660806A (en) * 1985-09-12 1987-04-28 Masters Scott A Push stick for plumb and line adjustment of stud walls
US4682914A (en) * 1985-12-23 1987-07-28 Isamu Aihara Hydraulic trench support
US4787781A (en) * 1987-05-14 1988-11-29 Walter Lipscomb Shoring device
GB2204621B (en) * 1987-05-14 1991-09-04 George Bradberry Shoring device
AU603455B2 (en) * 1987-06-23 1990-11-15 Polyform Pty. Ltd. Flexible load cell
EP0477451A1 (en) * 1990-09-28 1992-04-01 Speed Shore Corporation New and improved shoring shield
US5232312A (en) * 1992-04-24 1993-08-03 Jennings Charles B Shoring device
US5310290A (en) * 1993-03-12 1994-05-10 Spencer Dennis I Protective structure for excavations
US5513555A (en) * 1994-01-21 1996-05-07 Michael J. Plank Quick-release cam lock with locking pin
US5868060A (en) * 1994-01-24 1999-02-09 Speed Shore Corp. Quick-release cam lock
US5499890A (en) * 1994-07-08 1996-03-19 Americ Corporation Trench shoring device with locking mechanism
US6027102A (en) * 1997-04-21 2000-02-22 Krupa; Richard P. Hydraulic jack stand
US6017170A (en) * 1998-06-01 2000-01-25 American Rescue Technologies, Inc. Adjustable self locking shoring strut
US6039522A (en) * 1999-01-19 2000-03-21 Kinedyne Corporation Automatic locking and unlocking shoring bar
US6158705A (en) * 1999-04-09 2000-12-12 Airshore International Direct Equipment West Ltd. Vehicle Stabilization and support tool
US6379084B1 (en) * 1999-12-17 2002-04-30 Jack Kennedy Metal Products And Buildings, Inc. Mine stopping
US6682263B2 (en) 1999-12-17 2004-01-27 Jack Kennedy Metal Products & Buildings, Inc. Multiple tier stopping and method of constructing stopping
US6715961B2 (en) 1999-12-17 2004-04-06 Jack Kennedy Metal Products & Buildings, Inc. Method of supporting mine walls and installing a mine stopping
US7309191B2 (en) 2000-04-05 2007-12-18 Max Kadiu Shoring system
US7048471B2 (en) 2000-04-05 2006-05-23 Maksim Kadiu Shoring device
US6821057B1 (en) 2000-04-05 2004-11-23 Maksim Kadiu Magnetic shoring device
US6616133B1 (en) * 2001-07-18 2003-09-09 Norgren Automotive, Inc. Linear actuator having an adjustable piston rod
US6846132B2 (en) 2002-02-01 2005-01-25 Jack Kennedy Metal Products & Buildings, Inc. Mine stopping and braces therefor
US6585231B1 (en) * 2002-06-12 2003-07-01 Anthony R. Fratoni, Jr. Pneumatic jack
US6746183B1 (en) * 2002-09-23 2004-06-08 James G. Sullivan Shoring device with outer ratcheting collar
US6964542B1 (en) * 2002-09-23 2005-11-15 Sullivan James G Pin and collar shoring device
US7309190B1 (en) * 2002-09-23 2007-12-18 Sullivan James G Shoring device with removable swivel side plates containing detente sphere attachments
US7056067B2 (en) 2003-10-03 2006-06-06 Max Kadiu Trench shoring device
RU2274594C1 (ru) * 2004-11-30 2006-04-20 Евгений Антонович Сеноедов Конвейер пластинчатый передвижной с изменяемой высотой подъема
US20070264089A1 (en) * 2006-05-12 2007-11-15 Mccracken Robert Stackable concrete forming apparatus components
US7387470B2 (en) * 2006-05-12 2008-06-17 Mccracken Robert Stackable concrete forming apparatus components
US20090058117A1 (en) * 2007-09-05 2009-03-05 Tandemloc, Inc. Load Spreader Bar System
US7967352B2 (en) * 2007-09-05 2011-06-28 Tandemloc, Inc. Load spreader bar end cap
US20110206451A1 (en) * 2007-09-05 2011-08-25 Tandemloc, Inc. Load Spreader Bar Pipe Connection Sleeve
US8382175B2 (en) 2007-09-05 2013-02-26 Tandemloc, Inc. Load spreader bar pipe connection sleeve
US20090101774A1 (en) * 2007-10-23 2009-04-23 Lung Ching Shih Prop
US7584932B2 (en) * 2007-10-23 2009-09-08 Lung Ching Shih Construction prop
WO2009077793A1 (en) * 2007-12-14 2009-06-25 Petar Kunic Improved structure of hydraulic sheeting support
EA016191B1 (ru) * 2007-12-14 2012-03-30 Петар Куник Усовершенствованная конструкция гидравлической опоры для опалубки
US7837413B1 (en) * 2008-01-23 2010-11-23 Kundel Sr Robert Adjustable trench box and spreader bar
WO2011152727A1 (en) * 2010-06-04 2011-12-08 B.V. Holmatro Industrial Equipment Device comprising a cylinder, such as a spreader
NL2004821C2 (nl) * 2010-06-04 2011-12-06 Holmatro Ind Equip Inrichting met een cilinder, zoals een spreidvijzel.
CN103003186A (zh) * 2010-06-04 2013-03-27 荷马特罗有限公司 包括缸体的例如扩张器的装置
CN103003186B (zh) * 2010-06-04 2015-06-24 荷马特罗有限公司 包括缸体的装置
US8616519B2 (en) 2010-08-23 2013-12-31 Titan Formwork Systems, Llc Shoring post with supplemental beam support
US20120080579A1 (en) * 2010-10-03 2012-04-05 Gray Manufacturing Company Inc. Air-assisted heavy equipment support stand
US8662476B2 (en) 2011-01-31 2014-03-04 Weddle Tool Company Post ram
US9132993B1 (en) 2014-07-03 2015-09-15 Tandemloc, Inc. Load spreader bar pipe connecting sleeve with offset end plate

Also Published As

Publication number Publication date
JPS4942110A (en]) 1974-04-20
JPS5038402B2 (en]) 1975-12-09
GB1403466A (en) 1975-08-28
AU5413073A (en) 1974-10-10

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Legal Events

Date Code Title Description
AS Assignment

Owner name: BERG,MARY 33320 BOURQUIN CRESCENT, ABBOTSFORD, BRI

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:H.B. CONTRACTING LTD.;REEL/FRAME:004165/0166

Effective date: 19830812