CA1267394A - Ladder support - Google Patents
Ladder supportInfo
- Publication number
- CA1267394A CA1267394A CA000601322A CA601322A CA1267394A CA 1267394 A CA1267394 A CA 1267394A CA 000601322 A CA000601322 A CA 000601322A CA 601322 A CA601322 A CA 601322A CA 1267394 A CA1267394 A CA 1267394A
- Authority
- CA
- Canada
- Prior art keywords
- cradle
- machine
- ladder
- frame
- proximal end
- 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
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C1/00—Ladders in general
- E06C1/02—Ladders in general with rigid longitudinal member or members
- E06C1/38—Special constructions of ladders, e.g. ladders with more or less than two longitudinal members, ladders with movable rungs or other treads, longitudinally-foldable ladders
- E06C1/397—Special constructions of ladders, e.g. ladders with more or less than two longitudinal members, ladders with movable rungs or other treads, longitudinally-foldable ladders characterised by having wheels, rollers, or runners
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C7/00—Component parts, supporting parts, or accessories
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C7/00—Component parts, supporting parts, or accessories
- E06C7/42—Ladder feet; Supports therefor
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ladders (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A machine for the disposition of a ladder includes a frame having front leg means at the proximal end thereof, rear leg means and ladder fixing means at the distal end thereof and cradle fixing means between said proximal end thereof and said distal end thereof. A
cradle is also included having means for rotatable attachment to opposite sides of said proximal end of said frame. Longitudinal cradling means are disposed between said means for rotatable attachment of said cradle and the distal end of said cradle and have means for rotatable attachment of a ladder therebetween near said distal end of said cradle.
A machine for the disposition of a ladder includes a frame having front leg means at the proximal end thereof, rear leg means and ladder fixing means at the distal end thereof and cradle fixing means between said proximal end thereof and said distal end thereof. A
cradle is also included having means for rotatable attachment to opposite sides of said proximal end of said frame. Longitudinal cradling means are disposed between said means for rotatable attachment of said cradle and the distal end of said cradle and have means for rotatable attachment of a ladder therebetween near said distal end of said cradle.
Description
2~ 3~i4 The ~resent invention relates to devices Eor the disposition of ladders and more specifically to a device for the transportation, raisinq and lowerinq of a ladder.
Prior art devices Eor the disposition of ladders qenerally ~rovide either for the upriqht mountinq of a ladder on a trolley or for sup~ortinq a ladder in a horizontal position for transport, with means ~rovided for deployina a ladder into a vertically upriqht position, and thereafter su~orting the ladder by various systems employinq struts, braces and similar mechanisms. ~lthouqh some prior art devices for the disposition of ladders provide for the pivoting of ladders once about a single fulcrum on a support frame, such devices commonly either emDloy a winch to effect that ~ivotina or necessitate that the support frame have a hiqh ~rofile to ~rovide adequate support to the lower end of the ladder.
The above-described disadvan-taqes of prior art for the dis~osition of ladders may be reduced by orovidinq a device for the two stage rotational disposition of ladders about two se~arate Eulcrums.
Accordingly, the present invention provides a machine for supporting a ladder. The machine com~rises a frame having front leq means at the ~roximal end thereoE, rear leg means and ladder fixinq means at the distal end thereof and cradle fixina means between the proximal end thereof and distal end thereof. A cradle is also included having means -Eor rotatable attachmen-t to op~osite sides of said proximal end of said frame. ~ongitudinal cradlina means are disposed between said means for rotatable attachment of said cradle and the distal end of said cradle and have means for rotatable attachment of a ladder therebetween near said distal end of said cr~dle.
In drawings which illustrate embodiments of the invention, Fiqure 1 is an exploded ~erspective view of one embodiment of the machine oE the present invention, Fiqures 2 throuqh 4 are, respectively, detailed top, side and end views of the cradle shown in the `7~
embodiment of the invention depicted in Fiqure 1, Fiqure 5 is a side view of an emhodiment of the Erame of the ~resent invention, Fiqure 6 is a detailed cross-sectional view taken alonq the Line B-B' in Fiqure 5, Fiqure 7 is a detailed side view the up~er portion of the o~oosite side of the Erame shown in Fiqure 5, Fiqure 8 is a detailed cross-sectional view of the embodiment shown in Fiqure 7, taken about the line A-A', and Figure 9 is a detailed cross-sec-tional view of a latching mechanism present in an embodiment o~ the invention.
Referrinq to Eiqure 1, lon~itudinal su~ort means 5 and 6 of frame 100 may join front le~ means 110 to rear leq means 120. Frame 100 may further include transverse su~ort means 7 and 25 between opposite sides of frame 100. The rotatable attachment of cradle 200 to frame 100 may be near the top of the ~roximal end of the frame 100.
Ladder fixinq means 8 at the distal end of frame 100 may comprise a C-sha~ed bracket between the opposite sides, for example between the rear leg means l20, and openinq towards the proximal end oE Erame 100 and ~urposed to en~age a ladder. Such a C-shaped bracke-t may, for example, include one or more lockinq floor ~ads 19 on the base thereof. In the alternative thereto, or in addition thereto, the C-sha~ed bracket may be pur~osed, for example by means of a floor piece ]40 ~urposed to maintain the bottom of a ladder above the surface on which other parts of the frame 100 rest. In the alternati~e to such a C-shaped bracket the ladder fixinq means 8 may comPriSe known latchinq means purposed to enqaqe a ladder.
Either or both oE front leq means 110 and rear leq means 120 may have lockable wheels, such as rigid casters 17 or swivel casters 18, at the base thereof, such wheels may, for e~ample, be three or four in number. If the number oE such wheels is three they may, for example, be arranged such that two of such three lockable wheels are at the proximal end of the base and one oE three such lockable wheels is at the distal end of the base.
The frame 100 may further comorise stabili~ina arms 9 capable of engaqing the surface on which other parts of the frame 100 may be restinq. Such stabilizinq arms 9 may be rotatably attached to the frame 100 and may, for example, be capable of rotating outwardly and downwardly to enqage the surface and upwardly and inwardly to enqaqe the frame 100. Such stabilizing arms 9 may comprise a fin 150, ~ro~ectinq from the proximal end of a central member 160, and a Eoot pad 170 at the distal end of the central member 1~0.
The frame 100 may Eurther comprise locking means 16 capable of releasably enqaqing such stabili~inq arms 9 proximally to the fin 150 and the ~roximal end of the central member 160. Each such lockinq means 16 may, for example, com~rise a Plate rotatably enqaqin~ the outer surface of front leg means llO and adjustable in heiqht therealonq by means of for example, a thumbscrew toqether with a clasP encirclinq the corresPonding front leg means 110 and a-ttached to such a plate.
The cradle 200 may include su~port brackets ~1 between longitudinal cradlinq means 130 and the proximal end of the cradle 200, which may also include means for raising a ladder to provide sufficient clearance from the surface on which other parts of the Erame 100 are restinq, so that upon a ladder beinq rotatably attached to the distal end of the cradle 200 and the cradle 200 beinq rotated, contact oE an end of that ladder wi-th the surface on which the frame 100 is restinq does not impede the cradle fixing means from engaqinq. Such means for raisinq the ladder to provide sufficient clearance may, for example, comprise a lever 23 rotatably attached to the proximal end of the cradle 200 and purposed to enqage a ladder runq.
The cradle 200 may further comPrise means for slowly lowering the cradle 200. Such means may comprise a shock absorber 14 and means, such as for example, a bracket 13 near the top of the proximal end oE the frame 100 and a slat 3 extending downwardly from the proximal end of the cradle 200, the slat 3 having therethrough a hole for the insertion of a pin (not shown) through the slat 3 and through the shock absorber 14.
The cradle fixing means may comprise a latch/lever 12, a latch spring 2, a lever/safety pin 3, a safety pin plate 11 and latch spring positioning blocks 20. The elements of such cradle fixing means are arranged as follows. When the cradle fixing means is not engaged the latch spring 2 projects below the latch/lever 12. ~s the cradle 200 is raised upwardly and forwardly the latch spring 2 climbs onto and over a tapered surface of latch/lever 12. (Such tapered surface would present an upwardly and outwardly projecting surface). The latch 12 then engages a non-tapered portion of latch/lever 12.
Turning latch/lever 12 through 1~0 enables reversal of the orientation of the tapered surface and hence permits the latch spring 2 to climb onto and down the tapered surface and hence permits the cradle 200 (and thereby a ladder therein) to be lowere~d.
The means for rotatable attachment oE a ladder may comprise, for example, a guide 300 having longitudinal guide means 4A and 4B and, between opposite sides of said guide 300, transverse guide means 4C, the transverse guide means 4C including means, such as for example~ clamps or sets of nuts and bolts, for attaching a ladder to the guide 300. Such means 4C may also include, for example, plates attachable to guide means 4~ and 4B specially adapted to engage ladders of various cross-sections.
The frame 100 may further comprise storage means 15 attached, for example, to the underside of longitudinal support means 5 and 6 and to rear leg means 120 as shown in Figure 5.
In use, an ordinary or extendable ladder may be releasably attached to the cradle 200 or guide 300. If J~
the ladder is attached directly to the cradle 200 such attachment may be by means of clamps or of sets o~ nuts and bolts that permit rotation of the ladder about the distal end of the cradle 200. In the alternative, the ladder may be attached to the guide 300 by means of, for example, clamps or sets oE nu-ts and bolts, the guide 300 havinq been rotatably mounted near the distal end of the cradle 200. ~ith its lonqitudinal axis substantially parallel to and sliqhtly above the up~er surEaces of the cradle, the ladder may be placed in the guide with the upper and lower ends of the ladder extending past the proximal and distal ends of the cradle 200 and frame 100.
The proximal end of the ladder may then be pushed downward until the cradle fixing means enqages. The distal end of the ladder may then be pushed downward until the distal end of the ladder is enqaqed by ladder fixinq means 8.
~ter -the cradle 200 has been rotated about its rotatable attachment to the frame 100, the distal end of -the ladder or, if the guide 300 is present, both the distal end of the guide 300 and the distal end of the ladder, may be rotated rearwardly and downwardly to be enqaqed by ladder engaqing means 8~ ~he distance between lonqitudinal cradling means 130 may, for example, be less than the distance between lonqitudinal support means 5 and 6.
~5 It will be obvious to those skilled in the art that the scope of the present invention is not restricted to the embodiments disclosed above, but may instead be varied within the scove of the followinq claims without departing from the spirit and sco~e of the invention. For example, the embodiments described above may be operated wholly or partly by hydraulics or may be adapted to outdoor use by being equipped with larger wheels and/or a larger wheelbase than would be used for indoor use. It will also now be obvious that the above-described embodiments may be enlarqed and/or strenqthened to enable them to be used to erect a free standinq surface such as a ladder or a platform.
Prior art devices Eor the disposition of ladders qenerally ~rovide either for the upriqht mountinq of a ladder on a trolley or for sup~ortinq a ladder in a horizontal position for transport, with means ~rovided for deployina a ladder into a vertically upriqht position, and thereafter su~orting the ladder by various systems employinq struts, braces and similar mechanisms. ~lthouqh some prior art devices for the disposition of ladders provide for the pivoting of ladders once about a single fulcrum on a support frame, such devices commonly either emDloy a winch to effect that ~ivotina or necessitate that the support frame have a hiqh ~rofile to ~rovide adequate support to the lower end of the ladder.
The above-described disadvan-taqes of prior art for the dis~osition of ladders may be reduced by orovidinq a device for the two stage rotational disposition of ladders about two se~arate Eulcrums.
Accordingly, the present invention provides a machine for supporting a ladder. The machine com~rises a frame having front leq means at the ~roximal end thereoE, rear leg means and ladder fixinq means at the distal end thereof and cradle fixina means between the proximal end thereof and distal end thereof. A cradle is also included having means -Eor rotatable attachmen-t to op~osite sides of said proximal end of said frame. ~ongitudinal cradlina means are disposed between said means for rotatable attachment of said cradle and the distal end of said cradle and have means for rotatable attachment of a ladder therebetween near said distal end of said cr~dle.
In drawings which illustrate embodiments of the invention, Fiqure 1 is an exploded ~erspective view of one embodiment of the machine oE the present invention, Fiqures 2 throuqh 4 are, respectively, detailed top, side and end views of the cradle shown in the `7~
embodiment of the invention depicted in Fiqure 1, Fiqure 5 is a side view of an emhodiment of the Erame of the ~resent invention, Fiqure 6 is a detailed cross-sectional view taken alonq the Line B-B' in Fiqure 5, Fiqure 7 is a detailed side view the up~er portion of the o~oosite side of the Erame shown in Fiqure 5, Fiqure 8 is a detailed cross-sectional view of the embodiment shown in Fiqure 7, taken about the line A-A', and Figure 9 is a detailed cross-sec-tional view of a latching mechanism present in an embodiment o~ the invention.
Referrinq to Eiqure 1, lon~itudinal su~ort means 5 and 6 of frame 100 may join front le~ means 110 to rear leq means 120. Frame 100 may further include transverse su~ort means 7 and 25 between opposite sides of frame 100. The rotatable attachment of cradle 200 to frame 100 may be near the top of the ~roximal end of the frame 100.
Ladder fixinq means 8 at the distal end of frame 100 may comprise a C-sha~ed bracket between the opposite sides, for example between the rear leg means l20, and openinq towards the proximal end oE Erame 100 and ~urposed to en~age a ladder. Such a C-shaped bracke-t may, for example, include one or more lockinq floor ~ads 19 on the base thereof. In the alternative thereto, or in addition thereto, the C-sha~ed bracket may be pur~osed, for example by means of a floor piece ]40 ~urposed to maintain the bottom of a ladder above the surface on which other parts of the frame 100 rest. In the alternati~e to such a C-shaped bracket the ladder fixinq means 8 may comPriSe known latchinq means purposed to enqaqe a ladder.
Either or both oE front leq means 110 and rear leq means 120 may have lockable wheels, such as rigid casters 17 or swivel casters 18, at the base thereof, such wheels may, for e~ample, be three or four in number. If the number oE such wheels is three they may, for example, be arranged such that two of such three lockable wheels are at the proximal end of the base and one oE three such lockable wheels is at the distal end of the base.
The frame 100 may further comorise stabili~ina arms 9 capable of engaqing the surface on which other parts of the frame 100 may be restinq. Such stabilizinq arms 9 may be rotatably attached to the frame 100 and may, for example, be capable of rotating outwardly and downwardly to enqage the surface and upwardly and inwardly to enqaqe the frame 100. Such stabilizing arms 9 may comprise a fin 150, ~ro~ectinq from the proximal end of a central member 160, and a Eoot pad 170 at the distal end of the central member 1~0.
The frame 100 may Eurther comprise locking means 16 capable of releasably enqaqing such stabili~inq arms 9 proximally to the fin 150 and the ~roximal end of the central member 160. Each such lockinq means 16 may, for example, com~rise a Plate rotatably enqaqin~ the outer surface of front leg means llO and adjustable in heiqht therealonq by means of for example, a thumbscrew toqether with a clasP encirclinq the corresPonding front leg means 110 and a-ttached to such a plate.
The cradle 200 may include su~port brackets ~1 between longitudinal cradlinq means 130 and the proximal end of the cradle 200, which may also include means for raising a ladder to provide sufficient clearance from the surface on which other parts of the Erame 100 are restinq, so that upon a ladder beinq rotatably attached to the distal end of the cradle 200 and the cradle 200 beinq rotated, contact oE an end of that ladder wi-th the surface on which the frame 100 is restinq does not impede the cradle fixing means from engaqinq. Such means for raisinq the ladder to provide sufficient clearance may, for example, comprise a lever 23 rotatably attached to the proximal end of the cradle 200 and purposed to enqage a ladder runq.
The cradle 200 may further comPrise means for slowly lowering the cradle 200. Such means may comprise a shock absorber 14 and means, such as for example, a bracket 13 near the top of the proximal end oE the frame 100 and a slat 3 extending downwardly from the proximal end of the cradle 200, the slat 3 having therethrough a hole for the insertion of a pin (not shown) through the slat 3 and through the shock absorber 14.
The cradle fixing means may comprise a latch/lever 12, a latch spring 2, a lever/safety pin 3, a safety pin plate 11 and latch spring positioning blocks 20. The elements of such cradle fixing means are arranged as follows. When the cradle fixing means is not engaged the latch spring 2 projects below the latch/lever 12. ~s the cradle 200 is raised upwardly and forwardly the latch spring 2 climbs onto and over a tapered surface of latch/lever 12. (Such tapered surface would present an upwardly and outwardly projecting surface). The latch 12 then engages a non-tapered portion of latch/lever 12.
Turning latch/lever 12 through 1~0 enables reversal of the orientation of the tapered surface and hence permits the latch spring 2 to climb onto and down the tapered surface and hence permits the cradle 200 (and thereby a ladder therein) to be lowere~d.
The means for rotatable attachment oE a ladder may comprise, for example, a guide 300 having longitudinal guide means 4A and 4B and, between opposite sides of said guide 300, transverse guide means 4C, the transverse guide means 4C including means, such as for example~ clamps or sets of nuts and bolts, for attaching a ladder to the guide 300. Such means 4C may also include, for example, plates attachable to guide means 4~ and 4B specially adapted to engage ladders of various cross-sections.
The frame 100 may further comprise storage means 15 attached, for example, to the underside of longitudinal support means 5 and 6 and to rear leg means 120 as shown in Figure 5.
In use, an ordinary or extendable ladder may be releasably attached to the cradle 200 or guide 300. If J~
the ladder is attached directly to the cradle 200 such attachment may be by means of clamps or of sets o~ nuts and bolts that permit rotation of the ladder about the distal end of the cradle 200. In the alternative, the ladder may be attached to the guide 300 by means of, for example, clamps or sets oE nu-ts and bolts, the guide 300 havinq been rotatably mounted near the distal end of the cradle 200. ~ith its lonqitudinal axis substantially parallel to and sliqhtly above the up~er surEaces of the cradle, the ladder may be placed in the guide with the upper and lower ends of the ladder extending past the proximal and distal ends of the cradle 200 and frame 100.
The proximal end of the ladder may then be pushed downward until the cradle fixing means enqages. The distal end of the ladder may then be pushed downward until the distal end of the ladder is enqaqed by ladder fixinq means 8.
~ter -the cradle 200 has been rotated about its rotatable attachment to the frame 100, the distal end of -the ladder or, if the guide 300 is present, both the distal end of the guide 300 and the distal end of the ladder, may be rotated rearwardly and downwardly to be enqaqed by ladder engaqing means 8~ ~he distance between lonqitudinal cradling means 130 may, for example, be less than the distance between lonqitudinal support means 5 and 6.
~5 It will be obvious to those skilled in the art that the scope of the present invention is not restricted to the embodiments disclosed above, but may instead be varied within the scove of the followinq claims without departing from the spirit and sco~e of the invention. For example, the embodiments described above may be operated wholly or partly by hydraulics or may be adapted to outdoor use by being equipped with larger wheels and/or a larger wheelbase than would be used for indoor use. It will also now be obvious that the above-described embodiments may be enlarqed and/or strenqthened to enable them to be used to erect a free standinq surface such as a ladder or a platform.
Claims (21)
EXCLUSIVE PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS
FOLLOWS:
1. A machine for supporting a ladder above a surface, said machine comprising:
a frame having front leg means at the proximal end thereof, rear leg means and ladder fixing means at the distal end thereof and cradle fixing means between said proximal end thereof and said distal end thereof and a cradle having means for rotatable attachment thereof to opposite sides of said proximal end of said frame, and longitudinal cradling means between said means for rotatable attachment of said cradle and the distal end of said cradle, said longitudinal cradling means having means for rotatable attachment of a ladder therebetween near the distal end of said cradle.
a frame having front leg means at the proximal end thereof, rear leg means and ladder fixing means at the distal end thereof and cradle fixing means between said proximal end thereof and said distal end thereof and a cradle having means for rotatable attachment thereof to opposite sides of said proximal end of said frame, and longitudinal cradling means between said means for rotatable attachment of said cradle and the distal end of said cradle, said longitudinal cradling means having means for rotatable attachment of a ladder therebetween near the distal end of said cradle.
2. A machine as claimed in claim 1, wherein said frame further comprises longitudinal support means connecting said front leg means with said rear leg means.
3. A machine as claimed in claim 1, wherein said frame further comprises transverse support means between said opposite sides of said frame.
4. A machine as claimed in claim 1, wherein said rotatable attachment of said cradle is near the top of said proximal end of said frame.
5. A machine as claimed in claim 1, wherein said cradle fixing means comprises a latch/lever and a latch spring such that when said cradle fixing means is not engaged said latch spring projects below said latch/lever, and such that said latch spring is purposed to climb onto and over an upwardly and outwardly projecting tapered surface of said latch/lever, when said cradle is raised upwardly and forwardly, and to then releasably engage a non-tapered portion of said latch/lever, such engagement being releasable by means of said latch/lever being purposed to allow reversal of the Orientation of said tapered surface and hence to allow the latch spring to climb onto and down said tapered surface.
6. A machine as claimed in claim 1, wherein said ladder fixing means comprises a C-shaped bracket between said opposite sides of said frame and opening towards said proximal end of said frame and purposed to engage a ladder.
7. A machine as claimed in claim 1, wherein said ladder fixing means comprises a latch means purposed to engage a ladder.
8. A machine as claimed in claim 6, wherein said C-shaped bracket is further purposed to maintain the bottom of said ladder above said surface.
9. A machine as claimed in claim 1, wherein said means for rotatable attachment of a ladder comprises a guide having longitudinal guide means and, between opposite sides of said guide, transverse guide means, said transverse guide means including means for attaching a ladder to said guide.
10. A machine as claimed in claim 1, wherein said frame further comprises a plurality of lockable wheels at the base thereof.
11. A machine as claimed in claim 10, wherein the number of wheels in said plurality of lockable wheels is 3.
12. A machine as claimed in claim 11, wherein two of said three lockable wheels are at the proximal end of said base and one of said three lockable wheels is at the distal end of said base.
13. A machine as claimed in claim 1, wherein said frame further comprises stabilizing arms capable of engaging said surface.
14. A machine as claimed in claim 13, wherein said stabilizing arms are rotatably attached to said frame.
15. A machine as claimed in claim 14, wherein said stabilizing arms are capable of rotating outwardly and downwardly to engage said surface and upwardly and inwardly to engage said frame.
16. A machine as claimed in claim 15, wherein said stabilizing arms comprise a fin, projecting from the proximal end of a central member, and a foot pad at the distal end of said central member, said frame further comprising locking means capable of releasably engaging such stabilizing arms proximally to said fin and said proximal end of said central member.
17. A machine as claimed in claim 1, further comprising means for raising said ladder to provide sufficient clearance from said surface so that upon a ladder being rotatably attached near the distal end of said cradle and said cradle being rotated, contact of an end of said ladder with said surfaces does not impede said cradle fixing means from engaging.
18. A machine as claimed in claim 1, further comprising means for slowly lowering said cradle.
19. A machine as claimed in claim 18, wherein said means for slowly lowering said cradle comprises a shock absorber and means for attaching said shock absorber to said frame and to said cradle.
20. A machine as claimed in claim 19, wherein said means for attaching said shock absorber to said frame and to said cradle comprises a bracket near the too of the proximal end of said frame and a slat extending downwardly from the proximal end of said cradle.
21. A machine as claimed in claim 20, wherein said slat includes means for inserting a pin through said slat and through said shock absorber.
Priority Applications (10)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000601322A CA1267394A (en) | 1989-05-31 | 1989-05-31 | Ladder support |
| SE8903244A SE8903244L (en) | 1989-05-31 | 1989-10-04 | STAND UP |
| GB8922672A GB2232711B (en) | 1989-05-31 | 1989-10-09 | Ladder support |
| DE3942436A DE3942436A1 (en) | 1989-05-31 | 1989-12-19 | DEVICE FOR SETTING UP LADDERS |
| PL28535490A PL285354A1 (en) | 1989-05-31 | 1990-05-25 | Ladder supporting structure |
| KR1019900007781A KR900018495A (en) | 1989-05-31 | 1990-05-29 | Ladder Support |
| FR9006630A FR2647848B1 (en) | 1989-05-31 | 1990-05-29 | MOBILE MACHINE FOR SUPPORTING A LADDER |
| NL9001236A NL9001236A (en) | 1989-05-31 | 1990-05-30 | DEVICE FOR INSTALLING A LADDER. |
| JP2143246A JPH0396593A (en) | 1989-05-31 | 1990-05-30 | Machine for supporting ladder |
| CN90104033A CN1047719A (en) | 1989-05-31 | 1990-05-30 | Ladder support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000601322A CA1267394A (en) | 1989-05-31 | 1989-05-31 | Ladder support |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1267394A true CA1267394A (en) | 1990-04-03 |
Family
ID=4140135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000601322A Expired CA1267394A (en) | 1989-05-31 | 1989-05-31 | Ladder support |
Country Status (10)
| Country | Link |
|---|---|
| JP (1) | JPH0396593A (en) |
| KR (1) | KR900018495A (en) |
| CN (1) | CN1047719A (en) |
| CA (1) | CA1267394A (en) |
| DE (1) | DE3942436A1 (en) |
| FR (1) | FR2647848B1 (en) |
| GB (1) | GB2232711B (en) |
| NL (1) | NL9001236A (en) |
| PL (1) | PL285354A1 (en) |
| SE (1) | SE8903244L (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996021791A1 (en) * | 1995-01-12 | 1996-07-18 | Eckhard Klein | Ladder-supported working platform |
| FR2738280A1 (en) * | 1995-08-29 | 1997-03-07 | Hognon Sa | Ladder with ladder foot locking system |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006284365A (en) * | 2005-03-31 | 2006-10-19 | Casio Comput Co Ltd | Wristwatch, and program, technique, and system for wristwatch design |
| CN104060939B (en) * | 2014-05-05 | 2016-08-24 | 浙江浙能嘉兴发电有限公司 | A kind of ladder for large-scale grab bucket maintenance |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2586531A (en) * | 1950-04-20 | 1952-02-19 | Donald L Gordon | Wheeled support having ladder assembly |
| US2899010A (en) * | 1957-10-28 | 1959-08-11 | Rol Away Truck Mfg Company Inc | Transfer truck |
| CH430985A (en) * | 1964-10-07 | 1967-02-28 | Spoerle Geb | Mobile stairs or ladder |
| US3327810A (en) * | 1966-05-10 | 1967-06-27 | Up Right Inc | Self-supported ladder |
| US3731947A (en) * | 1971-06-03 | 1973-05-08 | L Fontaine | Ladder trolley |
| GB1440804A (en) * | 1973-06-27 | 1976-06-30 | Simon Eng Dudley Ltd | Access equipment |
| FR2427458A1 (en) * | 1978-06-01 | 1979-12-28 | Alaux Jean | Industrial folding step ladder - has articulated inclined and vertical uprights on chassis with wheels and skids |
| LU84556A1 (en) * | 1982-12-24 | 1984-10-22 | Leon Parent | RETRACTABLE LADDER OR STAIRCASE |
-
1989
- 1989-05-31 CA CA000601322A patent/CA1267394A/en not_active Expired
- 1989-10-04 SE SE8903244A patent/SE8903244L/en not_active Application Discontinuation
- 1989-10-09 GB GB8922672A patent/GB2232711B/en not_active Expired - Fee Related
- 1989-12-19 DE DE3942436A patent/DE3942436A1/en not_active Withdrawn
-
1990
- 1990-05-25 PL PL28535490A patent/PL285354A1/en unknown
- 1990-05-29 FR FR9006630A patent/FR2647848B1/en not_active Expired - Lifetime
- 1990-05-29 KR KR1019900007781A patent/KR900018495A/en not_active Application Discontinuation
- 1990-05-30 NL NL9001236A patent/NL9001236A/en not_active Application Discontinuation
- 1990-05-30 JP JP2143246A patent/JPH0396593A/en active Pending
- 1990-05-30 CN CN90104033A patent/CN1047719A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996021791A1 (en) * | 1995-01-12 | 1996-07-18 | Eckhard Klein | Ladder-supported working platform |
| FR2738280A1 (en) * | 1995-08-29 | 1997-03-07 | Hognon Sa | Ladder with ladder foot locking system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1047719A (en) | 1990-12-12 |
| SE8903244L (en) | 1990-12-01 |
| KR900018495A (en) | 1990-12-21 |
| DE3942436A1 (en) | 1990-12-06 |
| FR2647848B1 (en) | 1994-01-21 |
| GB8922672D0 (en) | 1989-11-22 |
| GB2232711A (en) | 1990-12-19 |
| NL9001236A (en) | 1990-12-17 |
| FR2647848A1 (en) | 1990-12-07 |
| JPH0396593A (en) | 1991-04-22 |
| SE8903244D0 (en) | 1989-10-04 |
| PL285354A1 (en) | 1991-02-11 |
| GB2232711B (en) | 1993-07-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |