US2683277A - Combined foot and roller - Google Patents

Combined foot and roller Download PDF

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Publication number
US2683277A
US2683277A US207131A US20713151A US2683277A US 2683277 A US2683277 A US 2683277A US 207131 A US207131 A US 207131A US 20713151 A US20713151 A US 20713151A US 2683277 A US2683277 A US 2683277A
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United States
Prior art keywords
leg
shaft
swinging
footplate
pin
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Expired - Lifetime
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US207131A
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Henricus F J Bernaerts
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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
    • B66F13/00—Common constructional features or accessories
    • 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
    • Y10S254/00—Implements or apparatus for applying pushing or pulling force
    • Y10S254/01—Jack bases

Definitions

  • the invention refers to a lifting jack with a central lifting column, said column being supported of three or more legs, each leg being provided with a footplate (see e. g. U. S. specifications 2,341,542 and 2,487,792).
  • Such lifting jacks are used for lifting heavy objects, particularly aircraft for control, repair
  • An object of the invention consists in increasing the handability of such lifting jacks which often have to be transported over large distances in repairshops, booths or hangars.
  • the lifting jack is constructed in such a way that it can be wheeled by means of one or more of the footplates in a during transport they function as wheels which,
  • one or more footplates consist of a wheel disk said disk being rotatably connected with a swinging shaft, said shaft being carried by the leg.
  • the swinging connection between shaft and leg may be constructed in different ways. It is possible to use a ball and socket joint which enables universal positioning of the footplate. It is also possible to use a double joint or cardan joint which provides the same possibilities. In some cases it is sufilcient to use a single joint. In this case the swinging shaft and the leg are mutually connected by means of a cylindrical cross-member of the one part, said member being inserted in a cylindrical socket of the other part.
  • the leg may be provided with a locking pin said pin engaging a corresponding bore in a lug of the shaft. Said arrangement shows advantages over, an arrangement in which the shaft carries a pin engaging a bore of the leg, for by such a bore the leg would be weakened.
  • the pin of the leg may be provided with a notch for a latch carried by the shaft.
  • the swinging shaft and the leg may be mutually supported in the vertical position of the wheel disk by means of a rib and a corresponding slot.
  • the drawing shows some embodiments of a lifting jack according to the invention.
  • Fig. 1 gives a longitudinal section of a leg with a footplate in the form of a wheel disk.
  • Fig. 2 shows the parts of Fig. l in a position in which the footplate is swung downwards.
  • Figs. 3 and 4 give longitudinal sections of a second and third embodiment of the invention.
  • FIG. 5 gives a front view of the inner side of the footplate.
  • Fig. 1 the leg I of a lifting jack, the central column of it is not shown in the drawing, said central column being supported by three of such legs.
  • the footplate 2 When the lifting jack is in use for supporting a heavy object, the footplate 2 is positioned as indicated in Fig. 2. From this position the swinging shaft 3 may be swung with respect to the leg I in such a way that the axle 4 of the footplate 2 which has the shape of a wheeldisk comes ina horizontal position (Figs. 1, 3 and 4) In this position the shaft may be latched by means of a latch 6 snapping into a notch of a locking pin 7, said pin engaging a bore of a lug ti of the shaft 3.
  • the latch 6 may be lifted against pressure of the spring 5 by means of a handle 9 in order to unlock the latch t and to swing back the footplate '12 in the horizontal
  • a handle 9 in order to unlock the latch t and to swing back the footplate '12 in the horizontal
  • said legs enclosing a lug ll of the axle 4.
  • the leg I carries a cylindrical cross-member it which is inserted in a corresponding socket of the shaft 3 which is locked by means of a closing disk 13'.
  • the described embodiments have a footplate, which shows in unlocked position a limited adaptability to unevennesses of the ground.
  • the embodiment of Fig. 4 shows a universal adaptability to such unevennesses for in this case a ball and socket joint is used.
  • the ball shaped end M of the leg I is supported in a socket of the shaft 3 which is closed by means of a closing disk I5
  • the leg is provided with a rib l6 joining the pin 7, said rib engaging a corresponding groove of the shaft 3'.
  • the foot plate 2 which has a shape of a wheel disk may be locked against shifting on the axle 4', respectively the shaft 3 by means of a locking plate H, which is secured to the axle 4 of Figs. 1 and 2 or to the shaft 3 of Fig. 3 or to the shaft 3 of Figs. 4 and 5 by any conventional means, as by spot welding.
  • a leg of a lifting jack and a supporting structure therefor said supporting structure comprising a swinging shaft, swinging connection means between the said swinging shaft and the lower end of the said leg, a foot plate formedas a wheel disc rotatably mounted on the said swinging shaft, swinging together with the said swinging shaft into a horizontal position of the footplate for supporting the jack and into a vertical position of the footplate for wheeling the jack, respectively, and means disposed adjacent to the lower end of the said leg for releasably securing the said foot plateinvertical wheeling position.
  • the said swinging connection means between the said swingingnshaft and the lower end of the said leg comprises a single joint which includes a U-shapedformat-ion havingtwo parallelly disposed arms at.the:lower.end of'the said leg, said arms of the U-shaped formation having aligned bores, a lug *extending'fromthe said axle and received in the space between the said arms, the said lug having a bore beingaligned with the said bores of the said arms, and a second ,shaft extending through. the said bores of the arms and of the lug and connectingithe said axle with the said leg for rotation'upon said second shaft.
  • the said means disposed adjacent the lower end of the said leg for releasably securing the said foot plate in vertical wheeling position comprises a pin extending from the said leg, the said swinging shaft has a lug disposed opposite the said pin of the leg in vertical wheeling position of the said swinging shaft, the said lug has a bore to receive the said pin ofthe leg, the said lug has pivotally secured thereto a latch and the said pin has a notch receiving the said latch in order to lock the swinging shaft in vertical wheeling position.

Description

July 13, 1954 H. F. J. BERNAERTS COMBINED FOOT AND- ROLLER Filed Jan. 22, 1951 Fae. 362 was;
' and maintenance.
Patented July 13, 1954 COMBINED FOOT AND ROLLER Henricus F. J. Bernaerts, Weert, Netherlands Application January 22, 1951, Serial No. 207,131
Claims priority, application Netherlands February 2, 1950 7 Claims. (01. 16-18) The invention refers to a lifting jack with a central lifting column, said column being supported of three or more legs, each leg being provided with a footplate (see e. g. U. S. specifications 2,341,542 and 2,487,792).
Such lifting jacks are used for lifting heavy objects, particularly aircraft for control, repair An object of the invention consists in increasing the handability of such lifting jacks which often have to be transported over large distances in repairshops, booths or hangars.
According to the invention the lifting jack is constructed in such a way that it can be wheeled by means of one or more of the footplates in a during transport they function as wheels which,
enable an easy transport over large distances.
Preferably one or more footplates consist of a wheel disk said disk being rotatably connected with a swinging shaft, said shaft being carried by the leg. The swinging connection between shaft and leg may be constructed in different ways. It is possible to use a ball and socket joint which enables universal positioning of the footplate. It is also possible to use a double joint or cardan joint which provides the same possibilities. In some cases it is sufilcient to use a single joint. In this case the swinging shaft and the leg are mutually connected by means of a cylindrical cross-member of the one part, said member being inserted in a cylindrical socket of the other part.
The leg may be provided with a locking pin said pin engaging a corresponding bore in a lug of the shaft. Said arrangement shows advantages over, an arrangement in which the shaft carries a pin engaging a bore of the leg, for by such a bore the leg would be weakened. The pin of the leg may be provided with a notch for a latch carried by the shaft. The swinging shaft and the leg may be mutually supported in the vertical position of the wheel disk by means of a rib and a corresponding slot. I
The drawing shows some embodiments of a lifting jack according to the invention.
Fig. 1 gives a longitudinal section of a leg with a footplate in the form of a wheel disk. I
Fig. 2 shows the parts of Fig. l in a position in which the footplate is swung downwards.
Figs. 3 and 4 give longitudinal sections of a second and third embodiment of the invention.
. position.
'a'sm l'e 'joint is used with ashaft. IE] inserted Fig. 5 gives a front view of the inner side of the footplate.
In Fig. 1 the leg I of a lifting jack, the central column of it is not shown in the drawing, said central column being supported by three of such legs. When the lifting jack is in use for supporting a heavy object, the footplate 2 is positioned as indicated in Fig. 2. From this position the swinging shaft 3 may be swung with respect to the leg I in such a way that the axle 4 of the footplate 2 which has the shape of a wheeldisk comes ina horizontal position (Figs. 1, 3 and 4) In this position the shaft may be latched by means of a latch 6 snapping into a notch of a locking pin 7, said pin engaging a bore of a lug ti of the shaft 3.
As may be seen from Fig. 5 the latch 6 may be lifted against pressure of the spring 5 by means of a handle 9 in order to unlock the latch t and to swing back the footplate '12 in the horizontal In the embodiment of Figs. 1 and 2 through bores of legs of the U-shapd'end of the leg I, said legs enclosing a lug ll of the axle 4.
In the embodiment of Figs. 3 and 4 the leg I carries a cylindrical cross-member it which is inserted in a corresponding socket of the shaft 3 which is locked by means of a closing disk 13'. The described embodiments have a footplate, which shows in unlocked position a limited adaptability to unevennesses of the ground. However, the embodiment of Fig. 4 shows a universal adaptability to such unevennesses for in this case a ball and socket joint is used. The ball shaped end M of the leg I is supported in a socket of the shaft 3 which is closed by means of a closing disk I5 In order to improve the connection between the leg I and the shaft 3' in the locked position of the shaft (Fig. 3), the leg is provided with a rib l6 joining the pin 7, said rib engaging a corresponding groove of the shaft 3'.
In the described embodiments the foot plate 2 which has a shape of a wheel disk may be locked against shifting on the axle 4', respectively the shaft 3 by means of a locking plate H, which is secured to the axle 4 of Figs. 1 and 2 or to the shaft 3 of Fig. 3 or to the shaft 3 of Figs. 4 and 5 by any conventional means, as by spot welding.
What I claim is:
1. In combination; a leg of a lifting jack and a supporting structure therefor, said supporting structure comprising a swinging shaft, swinging connection means between the said swinging shaft and the lower end of the said leg, a foot plate formedas a wheel disc rotatably mounted on the said swinging shaft, swinging together with the said swinging shaft into a horizontal position of the footplate for supporting the jack and into a vertical position of the footplate for wheeling the jack, respectively, and means disposed adjacent to the lower end of the said leg for releasably securing the said foot plateinvertical wheeling position.
2. The leg and supporting structure, as set forth in claim 1, in which the said swinging connection means between the said swingingnshaft and the lower end of the said leg comprises a single joint which includes a U-shapedformat-ion havingtwo parallelly disposed arms at.the:lower.end of'the said leg, said arms of the U-shaped formation having aligned bores, a lug *extending'fromthe said axle and received in the space between the said arms, the said lug having a bore beingaligned with the said bores of the said arms, and a second ,shaft extending through. the said bores of the arms and of the lug and connectingithe said axle with the said leg for rotation'upon said second shaft.
3. The leg and supporting structure, as set forth in claim 1, in whicliithe said swinging connection means between the said swinging shaft and the lower endof'the said leg comprises a cylindrical cross-member secured to Y the lower end of the'said leg, the said swinging shaft includes a socket receiving the said cylindrical cross-member, and a closingdisc secured to the said swinging shaft to "lock the said cylindrical cross-member in the said socket.
4. The leg and supporting structure,. as set forth in claim 1, in which the said swinging con nection means between the said swinging shaft and the lower end of the said leg comprises a ball secured to the lowerend'of the said leg, the said swinging shaft includes. a socket receiving the said ball, and a closing disc secured to the" said swinging shaft to lock the said ball in'the said socket.
- said pin inthe said lug of the swinging shaft.
6. The leg and supporting structure, as set forth in claim 1, in which the said means disposed adjacent the lower end of the said leg for releasably securing the said foot plate in vertical wheeling position comprises a pin extending from the said leg, the said swinging shaft has a lug disposed opposite the said pin of the leg in vertical wheeling position of the said swinging shaft, the said lug has a bore to receive the said pin ofthe leg, the said lug has pivotally secured thereto a latch and the said pin has a notch receiving the said latch in order to lock the swinging shaft in vertical wheeling position.
7. The leg and supportingstructure, as set forth in claim 1, in which the said foot plate has arecess, and a locking plate disposed in the said recess to secure the-said foot plate to the said swinging shaft.
. References Cited. inv the .file of this patent UNITED STATES PATENTS Number Name Date 887,663 Lee May 12, 1908 1,358,092 Millard Nov. 9, 1920 1,396,128 Kopplin Nov. 8, 1921 1,638,725 Chestnutt Aug. 9, 1927 2,487,792 Custer Nov. 15, 1949 2,572,348 Y Johnson Oct. 23, 1951
US207131A 1950-02-02 1951-01-22 Combined foot and roller Expired - Lifetime US2683277A (en)

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2885181A (en) * 1956-08-13 1959-05-05 Sperry Rand Corp Support-jack
US2937003A (en) * 1956-10-12 1960-05-17 John L Croll Hydraulic lift
US2995771A (en) * 1959-05-11 1961-08-15 Arthur J Mullikin Gimbaled caster
US2995770A (en) * 1959-03-18 1961-08-15 Arthur J Mullikin Gimbaled caster
US4150813A (en) * 1977-08-25 1979-04-24 Amado Mena Jack system for vehicle
US4763868A (en) * 1986-10-17 1988-08-16 Whirlpool Corporation Levelling combination wheel and leg assembly for a refuse compactor
US4824136A (en) * 1987-05-11 1989-04-25 The Binkley Company Landing gear for a vehicle
US20090114782A1 (en) * 2006-03-22 2009-05-07 De'longhi S.P.A. Electric grill support foot for the cooking of food products and electric grill having such support foot
US20090159863A1 (en) * 2007-09-28 2009-06-25 Scott Gary M Retractable jack foot
US9333823B2 (en) 2013-12-23 2016-05-10 Hossein Shahroodi Gravitationally aligning wheels
USD879514S1 (en) 2018-04-16 2020-03-31 Playground Store Limited Desk
USD895325S1 (en) 2018-04-16 2020-09-08 Playground Store Limited Desktop with stowed legs
US11051611B2 (en) 2018-04-16 2021-07-06 Playground Store Limited Desk system
US11466808B2 (en) * 2020-02-03 2022-10-11 David Klein Apparatus for holding a container on an uneven surface

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US887663A (en) * 1907-07-26 1908-05-12 Charles Lee Chair-leg attachment.
US1358092A (en) * 1920-04-29 1920-11-09 James H Millard Folding axle
US1396128A (en) * 1921-02-03 1921-11-08 Otto E Kopplin Stub-axle adjustment device
US1638725A (en) * 1925-04-24 1927-08-09 Walter Raleigh Darnell Glide caster
US2487792A (en) * 1946-11-07 1949-11-15 Randall M Custer Arced-lift jack
US2572348A (en) * 1948-11-22 1951-10-23 Lee D Johnson Portable pallet mounting structure

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US887663A (en) * 1907-07-26 1908-05-12 Charles Lee Chair-leg attachment.
US1358092A (en) * 1920-04-29 1920-11-09 James H Millard Folding axle
US1396128A (en) * 1921-02-03 1921-11-08 Otto E Kopplin Stub-axle adjustment device
US1638725A (en) * 1925-04-24 1927-08-09 Walter Raleigh Darnell Glide caster
US2487792A (en) * 1946-11-07 1949-11-15 Randall M Custer Arced-lift jack
US2572348A (en) * 1948-11-22 1951-10-23 Lee D Johnson Portable pallet mounting structure

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2885181A (en) * 1956-08-13 1959-05-05 Sperry Rand Corp Support-jack
US2937003A (en) * 1956-10-12 1960-05-17 John L Croll Hydraulic lift
US2995770A (en) * 1959-03-18 1961-08-15 Arthur J Mullikin Gimbaled caster
US2995771A (en) * 1959-05-11 1961-08-15 Arthur J Mullikin Gimbaled caster
US4150813A (en) * 1977-08-25 1979-04-24 Amado Mena Jack system for vehicle
US4763868A (en) * 1986-10-17 1988-08-16 Whirlpool Corporation Levelling combination wheel and leg assembly for a refuse compactor
US4824136A (en) * 1987-05-11 1989-04-25 The Binkley Company Landing gear for a vehicle
US7874532B2 (en) * 2006-03-22 2011-01-25 De'longhi S.P.A. Foot support for vertically changing the incline of an electric grill apparatus
US20090114782A1 (en) * 2006-03-22 2009-05-07 De'longhi S.P.A. Electric grill support foot for the cooking of food products and electric grill having such support foot
US20090159863A1 (en) * 2007-09-28 2009-06-25 Scott Gary M Retractable jack foot
US8500102B2 (en) * 2007-09-28 2013-08-06 Progress Mfg. Inc. Retractable jack foot
US20140158960A1 (en) * 2007-09-28 2014-06-12 Progress Mfg. Inc. Retractable jack foot
US9321434B2 (en) * 2007-09-28 2016-04-26 Progress Mfg. Inc. Retractable jack foot
US9333823B2 (en) 2013-12-23 2016-05-10 Hossein Shahroodi Gravitationally aligning wheels
USD879514S1 (en) 2018-04-16 2020-03-31 Playground Store Limited Desk
USD895325S1 (en) 2018-04-16 2020-09-08 Playground Store Limited Desktop with stowed legs
US11051611B2 (en) 2018-04-16 2021-07-06 Playground Store Limited Desk system
US11466808B2 (en) * 2020-02-03 2022-10-11 David Klein Apparatus for holding a container on an uneven surface

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