US3462028A - Apparatus for reeving conduits in extendible uprights - Google Patents

Apparatus for reeving conduits in extendible uprights Download PDF

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Publication number
US3462028A
US3462028A US645367A US3462028DA US3462028A US 3462028 A US3462028 A US 3462028A US 645367 A US645367 A US 645367A US 3462028D A US3462028D A US 3462028DA US 3462028 A US3462028 A US 3462028A
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United States
Prior art keywords
mast
fluid
conduits
upright
conduit
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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
US645367A
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English (en)
Inventor
Alberto E Pi
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.)
Doosan Bobcat North America Inc
Original Assignee
Clark Equipment Co
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Filing date
Publication date
Application filed by Clark Equipment Co filed Critical Clark Equipment Co
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Publication of US3462028A publication Critical patent/US3462028A/en
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Expired - Lifetime legal-status Critical Current

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    • 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
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075—Constructional features or details
    • B66F9/20—Means for actuating or controlling masts, platforms, or forks
    • B66F9/205—Arrangements for transmitting pneumatic, hydraulic or electric power to movable parts or devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S414/00—Material or article handling
    • Y10S414/131—Transmission-line guide for a shiftable handler

Definitions

  • the field of art to which the invention pertains includes elevators, and more specifically portable elevators.
  • a principal object of my invention is to provide apparatus for reeving fluid conduits and electrical conductors .in an upright which is compact,- light weight, utilizes only static type fittings and is located generally within the margins of the upright.
  • I provide a three-stage upright having a mast, an intermediate slide, an inner slide, a carriage and an extendible fluid motor for elevating the slides and carriage.
  • a pair of chains are connected to the mast and fluid motor and reeved under a pair of sprockets mounted at the bottom of the intermediate slide.
  • a pair of flexible fluid conduits Connected to and looped between the mast and inner slide is a pair of flexible fluid conduits which are disposed in guides that are connected to the mast and intermediate slide.
  • Each guide is U-shaped in cross section, having an elongated opening which is disposed closely adjacent one of the chains so that the fluid conduit disposed therein cannot come out of the guide through the elongated opening.
  • FIGURE 1 is a rear-quarter perpsective view of a portion of a lift truck with the upright extended and showing to advantage my invention
  • FIGURE 2 is an elevational view from the rear of a three-stage upright in the fully collapsed position and which embodies my invention
  • FIGURE 3 is similar to FIG. 2, except that the carriage has been elevated to the full extent of the free lift available in the upright,
  • FIGURE 4 is similar to FIGS. 2 and 3 on a somewhat reduced scale and shows the upright fully extended
  • FIGURE 5 is a vertical section taken along the line 55 in FIG. 2 with certain parts removed for the sake of clarity, and
  • FIGURE 6 is a fragmentary plan view on an enlarged scale of the upright shown in the previous figures and with certain parts shown in section.
  • the reference numeral 10 denotes generally a portion of a lift truck which includes a cowl 12 on which are mounted various control levers 14 and a steering control wheel 16. Mounted on lift truck 10 forwardly of cowl 12 is an upright 18 which is shown extended.
  • upright 18 includes a mast 20, an intermediate slide 22 telescoped in and' movable vertically relative to mast 20, an inner slide telescoped in and movable vertically relative to intermediate slide 22 and a carriage 26 movable vertically along inner slide 24.
  • Mast 20 includes a pair of spaced apart C-shaped channels 28 which are connected by a pair of cross braces 30 to form a rigid unitary structure.
  • Intermediate slide 22 includes a pair of spaced apart I-shaped beams or rails 32 which are connected by means of a plurality of cross braces 34 to form a rigid unitary structure, and similarly inner slide 24 includes a pair of spaced apart I-shaped beams or rails 36 connected by a plurality of cross braces 38 to form a rigid unitary structure.
  • Upright 18 also includes a multiple ram type extendible fluid motor 40 having an outer cylinder portion 42 fixed to inner slide 24. Fluid motor40' is disposed intermediate the channels and rails, as shown, in a longitudinally extending position relative to the rails and channels.
  • a cross arm 44 Mounted on an extendible portion of fluid motor 40 is a cross arm 44 on which a pair of sprockets 46 are mounted for rotation on each side of fluid motor 40.
  • a pair of chains 48 are connected to carriage 26, trained over sprockets 46 and then connected to an anchor plate 50 mounted on cylinder 42 of fluid motor 40.
  • a pair of sprockets 52 are mounted for rotation on intermediate slide 22 adjacent the bottom thereof.
  • Apair of chains 54 are connected to different ones of channels 28 of mast 20, reeved under different ones of sprockets 52 and then connected to anchor plate 50, as shown.
  • Each chain 54 includes a run 56 which is substantially parallel to and adjacent one of channels 28 and a run 58 which is substantially parallel to and adjacent cylinder 42.
  • Valve 60 Mounted on carriage 26 is a valve 60 which, although it is shown mounted on carriage 26, could just as well be mounted on an attachment carried by the carriage.
  • Valve 68 includes a spool which is actuatable from a first posi tion to a second or third position by means of solenoids 62 and 64.
  • Valve 40 also includes a pair of ports 66 and 68. Thus, by shifting the valve spool between the three positions thereof ports 66 and 68 can be connected to three different pairs of motor ports so that three separate fluid motors can be operated independently from a single pair of fluid supply and return conduits.
  • a rigid fluid conduit 70 is connected to port 66 at one end and is connected at the other end to a junction block 72 on carriage 26 which is mounted as shown in FIG. 6.
  • a rigid conduit 74 is connected to port 68 and a junction block 76.
  • junction block 72 and hence conduit 70 Connected at one end thereof to junction block 72 and hence conduit 70 is a flexible fluid conduit 78 which is reeved over a dual sheave assembly 80 that is mounted on cross arm 44 outwardly of sprocket 46, and then connected to a fitting 82 mounted on anchor plate 50.
  • a dual sheave assembly suitable for use here is described and claimed in a copending U.S. patent application Ser. No. 631,002, filed on Apr. 14, 1967, in the name of James H. Newhouse and assigned to the same assignee as this anplication is assigned.
  • a flexible fluid conduit 84 is connected at one 4 end thereof to junction block 76 and hence conduit 74, reeved over a dual sheave assembly 86 mounted for rotation on cross arm 44 outwardly of sprocket 46 and then connected to a fitting 88 mounted on anchor plate 50.
  • conduits 78 and 84 which has been described thus far acommodates the relative movement between carriage 26 and inner slide 24, as can be seen from a comparison of FIGS. 2 and 3.
  • An elongated conduit guide 90 is connected to cross braces 34 of intermediate slide 22.
  • Guide 90 is generally U-shaped in cross section and is disposed with the elongated opening thereof facing the run 58 of the adjacent chain 54 so that run 58 is partially disposed within guide 90 and substantially covers the elongated opening thereof.
  • another elongated conduit guide 92 is connected to cross braces 34 of intermediate slide 22.
  • Guide 92 is generally U-shaped in cross section and is disposed with the elongated opening thereof facing run 58 of the other chain 54 so that adjacent run 58 is partially disposed within guide 92 and substantially covers the elongated opening thereof.
  • an elongated conduit guide 94 which includes a section on each side of one of cross braces 30.
  • Guide 94 is generally U-shaped in cross section and includes an elongated opening.
  • Guide 94 is disposed so that run 56 of the adjacent chain 54 is partially disposed in guide 94 and substantially covers the elongated opening.
  • an elongated conduit guide 96 which includes a section on each side of one of cross braces 30 is connected to the other channel 28 of mast 20.
  • Guide 96 is generally U-shaped in cross section and disposed so that run 56 of the adjacent chain 54 is partially disposed in guide 96 and substantially covers the elongated opening of guide 96.
  • a flexible fluid conduit 98 is connected at one end to fitting 82 and hence conduit 78, looped under one of sprockets 52 and then connected to a fitting 100 mounted on one of channels 28 of mast 20 adjacent the top thereof.
  • Another conduit 102 is connected to fitting 100 and hence conduit 98 and is run down along channel 28 to the bottom thereof and from there to a control valve, not shown, mounted on truck 10.
  • Conduit 98 includes a run 104 which is disposed in guide 90 and prevented from moving out of guide 90 through the elongated opening thereof by run 58 of the adjacent chain 54.
  • conduit 98- includes a run 106 which is disposed in guide 94 and is prevented from coming out of guide 94 through the elongated opening thereof by run 56 of the adjacent chain 54.
  • a flexible fluid conduit 108 is connected at one end to fitting 88 and hence conduit 84, looped under the other of sprockets 52 and connected at the other end to a fitting 110 mounted on the other of channels 28 of mast 20.
  • Another conduit 112 is connected to fitting 110 and hence conduit 108 and run down along channel 28 to the bottom thereof and then over to a control valve, not shown, mounted on truck 10.
  • Conduit 108 includes a run 114 which is disposed in guide 92 and prevented from coming out of guide 92 through the elongated opening thereof by run 58 of the adjacent chain 54 and a run 116 which is disposed in guide 96 and is prevented from coming out of guide 96 through the elongated opening thereof by run 56 of the adjacent chain 54.
  • conduits 102 and 112 are connected to a control valve to which conduits 102 and 112 are connected so that one of the conduits is connected to a pump mounted on the truck and the other is connected to a reservoir mounted on a truck or vice versa or neither of them are connected to the pump and reservoir.
  • valve 60 it will be recalled that a pair of solenoids 62 and 64 were connected thereto for actuating the valve spool to connect ports 66 and 68 with various pairs of motor ports so that more than one fluid motor can be operated from a single pair of supply and return conduits.
  • solenoids 62 and 64 must be connected by electrical conductors to a control switch which in turn opens and closes a circuit between each solenoid and a source of electrical power, such as a battery or a generator.
  • solenoid 62 Connected to solenoid 62 is an electrical conductor 118 which is reeved over sheave assembly 80, fastened to anchor plate 50, run down to an anchor block 120, and then back up and over a sheave or pulley 122 mounted for rotation on a downwardly depending bracket 124 which is connected to the top cross brace 34 of intermediate slide 22.
  • Conductor 118 is then trained under another sheave or pulley 126 which is connected for rotation to a bracket 128 which is mounted on a cross brace 30 of mast 20, as shown, connected to one of channels 28 of mast 20 by means of a clip 130 and then trained down alongside channel 28 to a point adjacent the lower end thereof from where it is run over to an on-ofi switch mounted on truck 10.
  • sheave 126 is spring loaded by a tension spring 132 so that sheave 126 pulls on conductor 128, and thereby maintains it taut.
  • solenoid 64 Connected to solenoid 64 is an electrical conductor 134 which is reeved over sheave assembly 86, connected to anchor plate 50, run down to anchor block 120 and back up over a sheave or pulley 136 mounted for rotation on a downwardly depending bracket 138 which is connected to the top cross brace 34 of intermediate slide 22. From sheave 136 conductor 134 is run under another sheave or pulley 140 which is mounted for rotation on a bracket 142 connected to a cross brace 30 of mast 20, connected to the adjacent channel 28 of mast 20 by means of a clip 144 and from there down along channel 28 to a point near the bottom thereof from where it is run over to an off-on switch mounted on truck 10. Also, sheave 140 is spring loaded by means of a spring 146 to pull on conductor 134, and thus maintain the conductor taut.
  • my invention provides an extremely simple and compact reeving of both fluid conduits and electrical conductors in a triplestage upright having a carriage with full free lift, and further interferes only very slightly with operator visibih'ty through the upright since the fluid conduits and conduit guides are for the most part located behind the mast, slides and fluid motor.
  • an extendible upright having a mast, an intermediate slide connected to and movable along the mast, an inner slide connected to and movable along the intermediate slide, a fluid motor for extending the upright, the fluid motor including an outer cylinder fixed to the inner slide, a pair of sheaves connected to the intermediate slide adjacent to the bottom thereof and a pair of chains connected at opposite ones of their ends to the mast and outer cylinder and reeved under diflerent ones of the pair of sheaves, the improvement comprising first and second guides connected to the mast, third and fourth guides connected to the intermediate slide and first and second flexible fluid conduits, the said first conduit being looped between and connected to the mast and outer cylinder and disposed in the said first and third guides and the said second conduit being looped between and connected to the mast and outer cylinder and disposed in the said second and fourth guides, each guide including an elongated opening disposed adjacent one of the chains so that the adjacent chain prevents the conduit disposed -'in the guide from coming out of the guide through the elongated opening.

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Forklifts And Lifting Vehicles (AREA)
US645367A 1967-06-12 1967-06-12 Apparatus for reeving conduits in extendible uprights Expired - Lifetime US3462028A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US64536767A 1967-06-12 1967-06-12

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US3462028A true US3462028A (en) 1969-08-19

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US (1) US3462028A (forum.php)
BE (1) BE715129A (forum.php)
BR (1) BR6898584D0 (forum.php)
DE (1) DE1756526A1 (forum.php)
FR (1) FR1565862A (forum.php)
GB (1) GB1181586A (forum.php)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3768595A (en) * 1970-07-15 1973-10-30 White Equipment Co Lift truck mast
US3777853A (en) * 1972-04-05 1973-12-11 Allis Chalmers Hose guide for lift truck
US3871494A (en) * 1970-07-15 1975-03-18 Jr Wilfred H Kelly Lift truck mast
US3899046A (en) * 1974-07-03 1975-08-12 Clark Equipment Co Coupling electric line inside of fluid conduit
US3968859A (en) * 1974-12-23 1976-07-13 Allis-Chalmers Corporation Multiple hose guide arrangement for a lift truck
US3987870A (en) * 1975-11-03 1976-10-26 Towmotor Corporation Mast assembly
US4051970A (en) * 1975-11-07 1977-10-04 K-D Manufacturing Company Lift truck load handling mast
US4215622A (en) * 1978-09-22 1980-08-05 Clark Equipment Company Hydraulic control system
USRE30815E (en) * 1970-07-15 1981-12-08 White Farm Equipment Lift truck mast
US4355703A (en) * 1979-03-08 1982-10-26 Clark Equipment Company Upright for lift truck
WO1984000149A1 (en) * 1982-06-25 1984-01-19 Towmotor Corp High-visibility mast assembly for lift trucks
US4503936A (en) * 1982-10-04 1985-03-12 Towmotor Corporation Hydraulic hose mounting arrangement for high-visibility mast assembly
US4683987A (en) * 1984-11-12 1987-08-04 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Hydraulic power piping unit for a lift truck
FR2845981A1 (fr) * 2002-10-18 2004-04-23 Linde Ag Structure de levage equipee de tuyaux hydrauliques pour un equipement hydraulique
US20080196976A1 (en) * 2003-08-05 2008-08-21 Robert Lewis Mast construction for a lift truck

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2815024C2 (de) * 1978-04-07 1986-05-07 O & K Orenstein & Koppel Ag, 1000 Berlin Spann- und Arbeitsstreckenausgleichsanordnung für Hydraulikschläuche an Hubmasten von Gabelstaplern
GB2234311B (en) * 1989-07-04 1992-12-02 Lansing Linde Ltd Industrial lift trucks and hose guides therefor

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2791293A (en) * 1953-11-02 1957-05-07 Baker Raulang Co Industrial truck
US2979162A (en) * 1957-01-28 1961-04-11 Yale & Towne Mfg Co Upright assembly for industrial trucks
US3298463A (en) * 1964-05-18 1967-01-17 Clark Equipment Co Triple stage upright for lift truck

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2791293A (en) * 1953-11-02 1957-05-07 Baker Raulang Co Industrial truck
US2979162A (en) * 1957-01-28 1961-04-11 Yale & Towne Mfg Co Upright assembly for industrial trucks
US3298463A (en) * 1964-05-18 1967-01-17 Clark Equipment Co Triple stage upright for lift truck

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE30815E (en) * 1970-07-15 1981-12-08 White Farm Equipment Lift truck mast
US3871494A (en) * 1970-07-15 1975-03-18 Jr Wilfred H Kelly Lift truck mast
US3768595A (en) * 1970-07-15 1973-10-30 White Equipment Co Lift truck mast
US3777853A (en) * 1972-04-05 1973-12-11 Allis Chalmers Hose guide for lift truck
US3899046A (en) * 1974-07-03 1975-08-12 Clark Equipment Co Coupling electric line inside of fluid conduit
US3968859A (en) * 1974-12-23 1976-07-13 Allis-Chalmers Corporation Multiple hose guide arrangement for a lift truck
US3987870A (en) * 1975-11-03 1976-10-26 Towmotor Corporation Mast assembly
US4051970A (en) * 1975-11-07 1977-10-04 K-D Manufacturing Company Lift truck load handling mast
US4215622A (en) * 1978-09-22 1980-08-05 Clark Equipment Company Hydraulic control system
US4355703A (en) * 1979-03-08 1982-10-26 Clark Equipment Company Upright for lift truck
WO1984000149A1 (en) * 1982-06-25 1984-01-19 Towmotor Corp High-visibility mast assembly for lift trucks
US4503936A (en) * 1982-10-04 1985-03-12 Towmotor Corporation Hydraulic hose mounting arrangement for high-visibility mast assembly
US4683987A (en) * 1984-11-12 1987-08-04 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Hydraulic power piping unit for a lift truck
FR2845981A1 (fr) * 2002-10-18 2004-04-23 Linde Ag Structure de levage equipee de tuyaux hydrauliques pour un equipement hydraulique
US20040134715A1 (en) * 2002-10-18 2004-07-15 Klaus Rieder Lifting frame with hydraulic lines for an accessory hydraulic system
US7255201B2 (en) 2002-10-18 2007-08-14 Linde Aktiengesellschaft Lifting frame with hydraulic lines for an accessory hydraulic system
US20080196976A1 (en) * 2003-08-05 2008-08-21 Robert Lewis Mast construction for a lift truck
US7984793B2 (en) * 2003-08-05 2011-07-26 The Raymond Corporation Mast construction for a lift truck

Also Published As

Publication number Publication date
BE715129A (forum.php) 1968-09-30
FR1565862A (forum.php) 1969-05-02
BR6898584D0 (pt) 1973-01-02
GB1181586A (en) 1970-02-18
DE1756526A1 (de) 1971-09-02

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