CA1143353A - Wheel-ski assembly - Google Patents
Wheel-ski assemblyInfo
- Publication number
- CA1143353A CA1143353A CA000359984A CA359984A CA1143353A CA 1143353 A CA1143353 A CA 1143353A CA 000359984 A CA000359984 A CA 000359984A CA 359984 A CA359984 A CA 359984A CA 1143353 A CA1143353 A CA 1143353A
- Authority
- CA
- Canada
- Prior art keywords
- stem
- piston
- block
- wheel
- bore
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C25/00—Alighting gear
- B64C25/32—Alighting gear characterised by elements which contact the ground or similar surface
- B64C25/52—Skis or runners
Abstract
WHEEL-SKI ASSEMBLY
ABSTRACT OF THE DISCLOSURE
The wheel-ski assembly includes a base upturn-ed at the front end and bifurcated for approximately the last half to define a wheel channel between the two rear and parallel portions. A beam is secured to each side of the base adjacent the outer edges thereof and a wheel mount-ing assembly is mounted on each beam approximately half way along the length thereof and adjacent the front end of the wheel channel. The wheel mounting includes a mounting block supported vertically in each beam having a vertical bore formed therethrough into which a cylindrical support enga-ges in adjustable relationship with the block. An axle bearing surmounts the wheel support and a wheel axle spans the wheel channel and engages within the axle bearings above the plane of the beam with a wheel mounted on the axle. The lower perimeter of the wheel extends below the lower surface of the base. A spreader bar extends transversely between the two rear and parallel portions spanning the wheel channel rearwardly of the wheel and small bogie wheels are mounted inboard of the rear portions adjacent the rear ends thereof.
In one embodiment, the wheel is adjustable vertically by hy-draulic pressure so that the degree of penetration of the wheel can be controlled within limits to suit the landing or take-off surface conditions.
ABSTRACT OF THE DISCLOSURE
The wheel-ski assembly includes a base upturn-ed at the front end and bifurcated for approximately the last half to define a wheel channel between the two rear and parallel portions. A beam is secured to each side of the base adjacent the outer edges thereof and a wheel mount-ing assembly is mounted on each beam approximately half way along the length thereof and adjacent the front end of the wheel channel. The wheel mounting includes a mounting block supported vertically in each beam having a vertical bore formed therethrough into which a cylindrical support enga-ges in adjustable relationship with the block. An axle bearing surmounts the wheel support and a wheel axle spans the wheel channel and engages within the axle bearings above the plane of the beam with a wheel mounted on the axle. The lower perimeter of the wheel extends below the lower surface of the base. A spreader bar extends transversely between the two rear and parallel portions spanning the wheel channel rearwardly of the wheel and small bogie wheels are mounted inboard of the rear portions adjacent the rear ends thereof.
In one embodiment, the wheel is adjustable vertically by hy-draulic pressure so that the degree of penetration of the wheel can be controlled within limits to suit the landing or take-off surface conditions.
Description
WHEEL-SKI ASSEMBLY
BACKGROUND OF THE INVENTION
This invention relates to new and useful im-provements in wheel-ski assemblies for aircraft.
Such assemblies conventionally are extremely unwieldy and heavy in construction. Furthermore, the con-ventional construction causes considerable drag when the aircraft is flying. Conventional devices are not adjust-able vertically making it difficult to utilize the aircraft to its fullest extent during winter conditions.
The present invention overcomes these disadvan-tages by providing a relatively lightweight yet strong wheel-ski assembly which reduces drag due to the construction the-reof and also includes means whereby the wheel can be adjust-ed vertically within limits either mechanically, or prefer-ably hydraulically.
In accordance with the invention, there is pro-vided a wheel-ski assembly for aircraft comprising in combi-nation a substantially planar, elongate base portion having an upturned front end, a wheel channel formed through said base portion spaced rearwardly from the front end thereof, a pair of spaced and parallel longitudinally extending beams :::
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11~3353 secured to the upper side of said base portion one adjacent each side edge thereof, a wheel mounting assembly in said beams, one upon each side of said wheel channel, an axle spanning said wheel mounting assemblies and a ground engag-ing wheel mounted on said axle; each of said wheel mount-ing assemblies including a saddle component over said beam and secured thereto, a mounting block extending vertically through said saddle and said beam and being secured there-to and an axle support in said mounting block and extending upwardly therefrom, said axle engaging said axle support, said mounting block including a vertical bore formed therein, said axle support including a vertical stem engageable with-in said bore and means to secure same therein, and bearing means on the upper end of said stem to receive said wheel axle.
Another advantage of the invention is to provide a device of the character herewithin described which main-tains the desired weight distribution upon the skis when on the ground and which permits easy tracking of the air-craft on the ground when taxiing, landing or taking off.
Yet another advantage of the invention is to pro-vide a device of the character herewithin described which is simple in construction, economical in manufacture and otherwise well suited to the purpose for which it is designed.
~ith the foregoing in view, and other advantages as will become apparent to those skilled in the art to which :.
, .~
~1~3353 this invention relates as this specification proceeds, the invention is herein described by reference to the accompany-ing drawings forming a part hereof, which includes a de-scription of the preferred typical embodiment of the prin-ciples of the present invention, in which:
DESCRIPTION OF THE DRAWINGS
Figure 1 is a side elevation of the wheel-ski :
.
11~33~;3 assembly.
Figure 2 is a top plan view of Figure 1.
Figure 3 is an enlarged cross sectional view substantially along the line 3-3 of Figure 1.
Figure 4 is an isometric view of the mounting block per se.
Figure 5 is an isometric view of the axle sup-port per se.
Figure 6 is a vertical cross section of the >
preferred embodiment of the mounting block assembly.
In the drawings like characters of reference indicate corresponding parts in the different figures. , DETAILED DESCRIPTION
Proceeding therefore to describe the invention in detail, reference character 10 illustrates generally the planar, elongate base of the ski assembly with the front end 11 curving gradually upwardly as is conventional and being rounded at the front as indicated by reference character 12 in Figure 2.
A wheel channel 13 is provided within approxima-tely the rear half of the base and symmetrical about the :
.
" ~ ' longitudinal axis 14 thereof, the base being bifurcated to define the wheel channel having a curved front end 15 when viewed in plan, with the two spaced and parallel reaxward-ly extending side portions 16 being situated one upon each side of the wheel channel 13 as clearly shown in Figure 2.
A support and strengthening beam collectively designated 17 is secured upon each side portion 16 and upon the upper side thereof and extends forwardly to adjacent the front end of the base. Each of the beams comprises an inverted U-shaped channel 18 with out-turned flanges 19 be-ing formed on the lower ends of the sides 20 thereof, with the flanges being rivetted to the base as indicated schema-tically by reference character 21.
The planar upper surface 22 of these beams slo-pes gradually from the front towards the rear thereof with the rear ends 23 of the side portions 16 being angulated up-wardly and secured across the ends of the beams in order to : seal same as clearly shown in Figure 1.
The front end of the beam decreases in depth as it meets the upturned front end 11 thus sealing the beam at the front end thereof.
: ~ A wheel mounting assembly collectively designa-ted 24 is provided on each of the beams adjacent to but spa-ced rearwardly from the front end 15 of the wheel channel and the beam 17 is reinforced by means of an inverted U-shaped saddle assembly 25 secured over the beam by means of rivets 26. This saddle assembly is shaped to fit snugly over the beam configuration and includes the side plates 27, and the planar upper plate 28 which inclines upwardly from the front end 29 thereof to the apex 30 and then inclines downwardly to the rear end 31 thereof as clearly shown in Figure 1.
At the apex 30, a mounting block assembly is provided, said mounting block assembly being indicated in general by reference character 32 and the saddle assembly 25 together with the beam is apertured to receive this mounting block assembly.
Reference to Figure 3 will show the reinforcing structure provided. It includes, in this embodiment, a s~uare cross sectioned tube having sides 33 which engages downwardly through the aperture within the saddle 25 and downwardly through an aperture within the beam. Side shims 34 are placed between the side plates 33 of the mounting block and the side plates 27 of the saddle and further rein-.
~20~ forcing side plates 35 are in turn engaged upon either side of the sides of the saddle as shown in Figures 2 and 3. A
plurality of nut and bolt assemblies 36 extend through the components forwardly and rearwardly of the interior of the block 32 and securely clamp the assembly together as shown.
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~1433S3 A top flange 37 is welded to the top of theblock 32 and in turn is bolted to the upper planar surface of the saddle assembly 25 by means of nut and bolt assemblies 38. Various spacers and shims 39 are provided adjacent the upper ends of the sides 33 of the block as shown in Figure 3 and in the embodiment illustrated in Figures 1, 2 and 3, a main mounting nut and bolt assembly 40 is provided, the purpose of which will hereinafter be described.
Engageable within the bore 41 formed vertically through the block 32, is an axle support component collecti- -vely designated 42. This consists of a vertically situated stem 43 engaging within the bore 41 of the mounting block 32 and being held in the desired position by the aforementioned nut and bolt assembly 40 passing through any one of the pairs of cross drillings 44 formed in the walls of the stem 43 so that the vertical relationship of the axle support can be adjusted within limits.
Alternatively, a quick release type pin assembly (not illustrated) may be substituted for the nut and bolt assembly 40. Such quick release pin assemblies are conven-tional so that details thereof are not believed necessary ex-cept to say that they can be withdrawn and replaced without use of wrenches and other tools.
A transverse bearing shell 45 is secured trans-.
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, -~ ' ~43353 versely within a yoke 45A formed upon the upper end of the stem 43 with a cap or attachment tube section 46 secured on the upper side thereof and a wheel axle 47 extends through the transversely aligned bearing shells as indica-ted by line 48 in Figure 2.
A ground engaging wheel and tire assembly 49 is secured to the axle 47 and is situated within the wheel channel 13 with the lower periphery 49A extending below the lower surface 50 of the base.
This construction gives an extremely rigid yet lightweight support to the wheel assembly and to the ski itself, it being understood that the ski is attached to the aircraft by conventional means (not illustrated).
A spreader bar 51 extends between spreader bar attachments 52 on each beam just rearwardly of the rear ends 31 of the saddles 25 and maintains the parallel relationship of the rearwardly extending side portions 16 of the base.
Bogie wheel assemblies 52A are journalled for rotation with-in wheel support assemblies 53 adjacent the rear ends 54 of the side portions 16, said bogie wheel assemblies being si-tuated on the inner sides 55 of these side supports and with-in the wheel channel 13 rearwardly of the wheel 49 and the lower peripheries 56 of the bogie wheels also extend below the lower surface 50 of the base as clearly shown in Figure 1.
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The degree of penetration of the lower peri-phery of the wheel 49 is adjusted depending upon the sur-face conditions and these engage the ground or snow surface first while the aircraft still has flying speed, allowing it to settle upon the skis as the flying speed decreases.
The wheel 49 together with the bogie wheels 52, also permit the aircraft to be taxied on ice or hard surfaces or to be taxied upon snowy surfaces with the low-er portions of the wheels digging into the soft snow.
Also, the wheels permit the aircraft to take off or land upon hard surfaces such as concrete runways, ice surfaces and the like.
The preferred embodiment illustrated in Figure 6 shows means whereby the relationship of the wheel 49 can be adjusted hydraulically from a position where the wheel assembly is fully retracted relative to the underside of , the skis or can be extended to the fullest amount and, of course, can be placed in any desired position therebetween.
This allows the pilot to select the degree of penetration :~ ~
depending upon landing or take-off surface conditions with the selection being from the pilot cockpit.
In this embodiment, the block 57 is similar to the block 33 and is secured to the base in a manner simi-lar~to that illustrated and described in Figure 3. However, ' ~
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1~43353 g the cylindrical bore 58 is different to the bore 41. It includes an annular shoulder 59 adjacent the upper side thereof and the stem 60 slidably engages within the bore and is sealed at the upper end of the bore by means of O-rings 61 or the like.
The stem 60 is hollow and is provided with a further annular shoulder 62 on the base thereof and ex-tending outwardly from the stem and this shoulder 62 is also provided with O-rings 63 for sealing purposes.
` Inner ring or annular shoulder 63A is provided at the ends of the stem 60 and the bearing shell 45 is se-cured within the yoke 45A in a manner similar to that here-inbefore described, with the cap shell 46 being secured as by welding or the like.
A free floating piston 64 reciprocates within the stem 60 and below the ring 63, and is held clear of the base by means of a plurality of pins 65 extending inwardly from adjacent the lower end of the stem 6~.
~ Hydraulic fluid is pumped through conduit 66 -~ 20 to the underside of the piston 64 which moves the piston upwardly to the ring 63 ahd then raises the stem together , ~ with the axle 47 so that the wheels may be adjusted verti-,~ cally relative to the skis.
An air valve 67 is provided adjacent the upper ::
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` ~ ' ' ~ ' , ' " ' ' ',, ' ~33S3 end of stem 60 so that the volume above piston 64 may be preloaded with compressed air or nitrogen so that the pis-ton 64 commences its lift prior to reaching the ring 63 which acts as a stop. This means that the compressed air or nitrogen can act as a shock absorber when the plane lands although conventional shock absorbers may also be incorporated.
One or more spxing loaded pins 68 extend through the shoulder 62 on the lower end of the stem 60, the spring loading normally urging the pins inwardly thus permitting the stem to reciprocate freely within the cy-linder.
However, when the piston 64 is in the lower-most position shown in Figure 6, the lower chamfered end 69 of the piston moves the pins outwardly against spring pressure so that they engage within recesses 70 in the block 57 thus preventing relative movement between the stem 60 and the block 57. However, as soon as the piston is moved upwardly within the stem 60, these pins retract thus freeing the stem for movement within the block 57.
: Since various modifications can be made in my invention as hereinabove described, and many widely differ-ent embodiments of same made within the spirit and scope of the claims without departing from such spirit and scope, it ':
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11~3353 is intended that all matter contained in the accompanying specification shall be interpreted as illustrative only and not in a limiting sense.
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BACKGROUND OF THE INVENTION
This invention relates to new and useful im-provements in wheel-ski assemblies for aircraft.
Such assemblies conventionally are extremely unwieldy and heavy in construction. Furthermore, the con-ventional construction causes considerable drag when the aircraft is flying. Conventional devices are not adjust-able vertically making it difficult to utilize the aircraft to its fullest extent during winter conditions.
The present invention overcomes these disadvan-tages by providing a relatively lightweight yet strong wheel-ski assembly which reduces drag due to the construction the-reof and also includes means whereby the wheel can be adjust-ed vertically within limits either mechanically, or prefer-ably hydraulically.
In accordance with the invention, there is pro-vided a wheel-ski assembly for aircraft comprising in combi-nation a substantially planar, elongate base portion having an upturned front end, a wheel channel formed through said base portion spaced rearwardly from the front end thereof, a pair of spaced and parallel longitudinally extending beams :::
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11~3353 secured to the upper side of said base portion one adjacent each side edge thereof, a wheel mounting assembly in said beams, one upon each side of said wheel channel, an axle spanning said wheel mounting assemblies and a ground engag-ing wheel mounted on said axle; each of said wheel mount-ing assemblies including a saddle component over said beam and secured thereto, a mounting block extending vertically through said saddle and said beam and being secured there-to and an axle support in said mounting block and extending upwardly therefrom, said axle engaging said axle support, said mounting block including a vertical bore formed therein, said axle support including a vertical stem engageable with-in said bore and means to secure same therein, and bearing means on the upper end of said stem to receive said wheel axle.
Another advantage of the invention is to provide a device of the character herewithin described which main-tains the desired weight distribution upon the skis when on the ground and which permits easy tracking of the air-craft on the ground when taxiing, landing or taking off.
Yet another advantage of the invention is to pro-vide a device of the character herewithin described which is simple in construction, economical in manufacture and otherwise well suited to the purpose for which it is designed.
~ith the foregoing in view, and other advantages as will become apparent to those skilled in the art to which :.
, .~
~1~3353 this invention relates as this specification proceeds, the invention is herein described by reference to the accompany-ing drawings forming a part hereof, which includes a de-scription of the preferred typical embodiment of the prin-ciples of the present invention, in which:
DESCRIPTION OF THE DRAWINGS
Figure 1 is a side elevation of the wheel-ski :
.
11~33~;3 assembly.
Figure 2 is a top plan view of Figure 1.
Figure 3 is an enlarged cross sectional view substantially along the line 3-3 of Figure 1.
Figure 4 is an isometric view of the mounting block per se.
Figure 5 is an isometric view of the axle sup-port per se.
Figure 6 is a vertical cross section of the >
preferred embodiment of the mounting block assembly.
In the drawings like characters of reference indicate corresponding parts in the different figures. , DETAILED DESCRIPTION
Proceeding therefore to describe the invention in detail, reference character 10 illustrates generally the planar, elongate base of the ski assembly with the front end 11 curving gradually upwardly as is conventional and being rounded at the front as indicated by reference character 12 in Figure 2.
A wheel channel 13 is provided within approxima-tely the rear half of the base and symmetrical about the :
.
" ~ ' longitudinal axis 14 thereof, the base being bifurcated to define the wheel channel having a curved front end 15 when viewed in plan, with the two spaced and parallel reaxward-ly extending side portions 16 being situated one upon each side of the wheel channel 13 as clearly shown in Figure 2.
A support and strengthening beam collectively designated 17 is secured upon each side portion 16 and upon the upper side thereof and extends forwardly to adjacent the front end of the base. Each of the beams comprises an inverted U-shaped channel 18 with out-turned flanges 19 be-ing formed on the lower ends of the sides 20 thereof, with the flanges being rivetted to the base as indicated schema-tically by reference character 21.
The planar upper surface 22 of these beams slo-pes gradually from the front towards the rear thereof with the rear ends 23 of the side portions 16 being angulated up-wardly and secured across the ends of the beams in order to : seal same as clearly shown in Figure 1.
The front end of the beam decreases in depth as it meets the upturned front end 11 thus sealing the beam at the front end thereof.
: ~ A wheel mounting assembly collectively designa-ted 24 is provided on each of the beams adjacent to but spa-ced rearwardly from the front end 15 of the wheel channel and the beam 17 is reinforced by means of an inverted U-shaped saddle assembly 25 secured over the beam by means of rivets 26. This saddle assembly is shaped to fit snugly over the beam configuration and includes the side plates 27, and the planar upper plate 28 which inclines upwardly from the front end 29 thereof to the apex 30 and then inclines downwardly to the rear end 31 thereof as clearly shown in Figure 1.
At the apex 30, a mounting block assembly is provided, said mounting block assembly being indicated in general by reference character 32 and the saddle assembly 25 together with the beam is apertured to receive this mounting block assembly.
Reference to Figure 3 will show the reinforcing structure provided. It includes, in this embodiment, a s~uare cross sectioned tube having sides 33 which engages downwardly through the aperture within the saddle 25 and downwardly through an aperture within the beam. Side shims 34 are placed between the side plates 33 of the mounting block and the side plates 27 of the saddle and further rein-.
~20~ forcing side plates 35 are in turn engaged upon either side of the sides of the saddle as shown in Figures 2 and 3. A
plurality of nut and bolt assemblies 36 extend through the components forwardly and rearwardly of the interior of the block 32 and securely clamp the assembly together as shown.
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~1433S3 A top flange 37 is welded to the top of theblock 32 and in turn is bolted to the upper planar surface of the saddle assembly 25 by means of nut and bolt assemblies 38. Various spacers and shims 39 are provided adjacent the upper ends of the sides 33 of the block as shown in Figure 3 and in the embodiment illustrated in Figures 1, 2 and 3, a main mounting nut and bolt assembly 40 is provided, the purpose of which will hereinafter be described.
Engageable within the bore 41 formed vertically through the block 32, is an axle support component collecti- -vely designated 42. This consists of a vertically situated stem 43 engaging within the bore 41 of the mounting block 32 and being held in the desired position by the aforementioned nut and bolt assembly 40 passing through any one of the pairs of cross drillings 44 formed in the walls of the stem 43 so that the vertical relationship of the axle support can be adjusted within limits.
Alternatively, a quick release type pin assembly (not illustrated) may be substituted for the nut and bolt assembly 40. Such quick release pin assemblies are conven-tional so that details thereof are not believed necessary ex-cept to say that they can be withdrawn and replaced without use of wrenches and other tools.
A transverse bearing shell 45 is secured trans-.
. ,~
, -~ ' ~43353 versely within a yoke 45A formed upon the upper end of the stem 43 with a cap or attachment tube section 46 secured on the upper side thereof and a wheel axle 47 extends through the transversely aligned bearing shells as indica-ted by line 48 in Figure 2.
A ground engaging wheel and tire assembly 49 is secured to the axle 47 and is situated within the wheel channel 13 with the lower periphery 49A extending below the lower surface 50 of the base.
This construction gives an extremely rigid yet lightweight support to the wheel assembly and to the ski itself, it being understood that the ski is attached to the aircraft by conventional means (not illustrated).
A spreader bar 51 extends between spreader bar attachments 52 on each beam just rearwardly of the rear ends 31 of the saddles 25 and maintains the parallel relationship of the rearwardly extending side portions 16 of the base.
Bogie wheel assemblies 52A are journalled for rotation with-in wheel support assemblies 53 adjacent the rear ends 54 of the side portions 16, said bogie wheel assemblies being si-tuated on the inner sides 55 of these side supports and with-in the wheel channel 13 rearwardly of the wheel 49 and the lower peripheries 56 of the bogie wheels also extend below the lower surface 50 of the base as clearly shown in Figure 1.
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The degree of penetration of the lower peri-phery of the wheel 49 is adjusted depending upon the sur-face conditions and these engage the ground or snow surface first while the aircraft still has flying speed, allowing it to settle upon the skis as the flying speed decreases.
The wheel 49 together with the bogie wheels 52, also permit the aircraft to be taxied on ice or hard surfaces or to be taxied upon snowy surfaces with the low-er portions of the wheels digging into the soft snow.
Also, the wheels permit the aircraft to take off or land upon hard surfaces such as concrete runways, ice surfaces and the like.
The preferred embodiment illustrated in Figure 6 shows means whereby the relationship of the wheel 49 can be adjusted hydraulically from a position where the wheel assembly is fully retracted relative to the underside of , the skis or can be extended to the fullest amount and, of course, can be placed in any desired position therebetween.
This allows the pilot to select the degree of penetration :~ ~
depending upon landing or take-off surface conditions with the selection being from the pilot cockpit.
In this embodiment, the block 57 is similar to the block 33 and is secured to the base in a manner simi-lar~to that illustrated and described in Figure 3. However, ' ~
"
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.
1~43353 g the cylindrical bore 58 is different to the bore 41. It includes an annular shoulder 59 adjacent the upper side thereof and the stem 60 slidably engages within the bore and is sealed at the upper end of the bore by means of O-rings 61 or the like.
The stem 60 is hollow and is provided with a further annular shoulder 62 on the base thereof and ex-tending outwardly from the stem and this shoulder 62 is also provided with O-rings 63 for sealing purposes.
` Inner ring or annular shoulder 63A is provided at the ends of the stem 60 and the bearing shell 45 is se-cured within the yoke 45A in a manner similar to that here-inbefore described, with the cap shell 46 being secured as by welding or the like.
A free floating piston 64 reciprocates within the stem 60 and below the ring 63, and is held clear of the base by means of a plurality of pins 65 extending inwardly from adjacent the lower end of the stem 6~.
~ Hydraulic fluid is pumped through conduit 66 -~ 20 to the underside of the piston 64 which moves the piston upwardly to the ring 63 ahd then raises the stem together , ~ with the axle 47 so that the wheels may be adjusted verti-,~ cally relative to the skis.
An air valve 67 is provided adjacent the upper ::
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` ~ ' ' ~ ' , ' " ' ' ',, ' ~33S3 end of stem 60 so that the volume above piston 64 may be preloaded with compressed air or nitrogen so that the pis-ton 64 commences its lift prior to reaching the ring 63 which acts as a stop. This means that the compressed air or nitrogen can act as a shock absorber when the plane lands although conventional shock absorbers may also be incorporated.
One or more spxing loaded pins 68 extend through the shoulder 62 on the lower end of the stem 60, the spring loading normally urging the pins inwardly thus permitting the stem to reciprocate freely within the cy-linder.
However, when the piston 64 is in the lower-most position shown in Figure 6, the lower chamfered end 69 of the piston moves the pins outwardly against spring pressure so that they engage within recesses 70 in the block 57 thus preventing relative movement between the stem 60 and the block 57. However, as soon as the piston is moved upwardly within the stem 60, these pins retract thus freeing the stem for movement within the block 57.
: Since various modifications can be made in my invention as hereinabove described, and many widely differ-ent embodiments of same made within the spirit and scope of the claims without departing from such spirit and scope, it ':
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11~3353 is intended that all matter contained in the accompanying specification shall be interpreted as illustrative only and not in a limiting sense.
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Claims
WHAT I CLAIM AS MY INVENTION IS:
(1) A wheel-ski assembly for aircraft comprising in combination a substantially planar, elongate base portion having an upturned front end, a wheel channel formed through said base portion spaced rearwardly from the front end thereof, a pair of spaced and parallel longitudinally ex-tending beams secured to the upper side of said base por-tion one adjacent each side edge thereof, a wheel mounting assembly in said beams, one upon each side of said wheel channel, an axle spanning said wheel mounting assemblies and a ground engaging wheel mounted on said axle; each of said wheel mounting assemblies including a saddle compon-ent over said beam and secured thereto, a mounting block extending vertically through said saddle and said beam and being secured thereto and an axle support in said mounting block and extending upwardly therefrom, said axle engaging said axle support, said mounting block including a vertical bore formed therein, said axle support including a vertical stem engageable within said bore and means to secure same therein, and bearing means on the upper end of said stem to receive said wheel axle.
(2) The invention according to Claim 1 in which said stem is adjustable vertically within limits, within said bore thereby controlling the penetration of the peri-phery of said wheel relative to the underside of said base portion.
(3) The invention according to Claim 1 in which said base portion is bifurcated at the rear portion there-of thereby forming a pair of spaced and parallel rearwardly extending side portions defining said wheel channel there-between, each of said beams extending along one of said side portions.
(4) The invention according to Claim 2 in which said base portion is bifurcated at the rear portion there-of thereby forming a pair of spaced and parallel rearwardly extending side portions defining said wheel channel there-between, each of said beams extending along one of said side portions.
(5) The invention according to Claim 3 which in-cludes a spreader bar assembly extending transversely between said side portions adjacent the rear ends thereof.
(6) The invention according to Claim 4 which in-cludes a spreader bar assembly extending transversely between said side portions adjacent the rear ends thereof.
(7) The invention according to Claim 3 which in-cludes a bogie wheel journalled for rotation adjacent the end of each of said side portions and on the inner side thereof, the lower periphery of said bogie wheels extending below the underside of said side portions of said base.
(8) The invention according to Claim 4 which in-cludes a bogie wheel journalled for rotation adjacent the end of each of said side portions and on the inner side thereof, the lower periphery of said bogie wheels extending below the underside of said side portions of said base.
(9) The invention according to Claim 5 which in-cludes a bogie wheel journalled for rotation adjacent the end of each of said side portions and on the inner side thereof, the lower periphery of said bogie wheels extending below the underside of said side portions of said base.
(10) The invention according to Claim 6 which in-cludes a bogie wheel journalled for rotation adjacent the end of each of said side portions and on the inner side thereof, the lower periphery of said bogie wheels extending below the underside of said side portions of said base.
(11) The invention according to Claim 1 which includes means to adjust the vertical position of said wheel within limits relative to said base.
(12) The invention according to Claim 2 which includes means to adjust the vertical position of said wheel within limits relative to said base.
(13) The invention according to Claim 3 which includes means to adjust the vertical position of said wheel within limits relative to said base.
(14) The invention according to Claim 5 which includes means to adjust the vertical position of said wheel within limits relative to said base.
(15) The invention according to Claim 9 which includes means to adjust the vertical position of said wheel within limits relative to said base.
(16) The invention according to Claim 10 which includes means to adjust the vertical position of said wheel within limits relative to said base.
(17) The invention according to Claim 11 in which said means to adjust the vertical position of said wheels includes said stem having a plurality of spaced apart pairs of apertures therealong, said block having an aper-ture therethrough, and a support pin extending through said apertures in said block and through any pair of apertures in said stems.
(18) The invention according to Claim 12 in which said means to adjust the vertical position of said wheels includes said stem having a plurality of spaced apart pairs of apertures therealong, said block having an aper-ture therethrough, and a support pin extending through said apertures in said block and through any pair of apertures in said stems.
(19) The invention according to Claim 13 in which said means to adjust the vertical position of said wheels includes said stem having a plurality of spaced apart pairs of apertures therealong, said block having an aper-ture therethrough, and a support pin extending through said apertures in said block and through any pair of apertures in said stems.
(20) The invention according to Claim 14 in which said means to adjust the vertical position of said wheels includes said stem having a plurality of spaced apart pairs of apertures therealong, said block having an aper-ture therethrough, and a support pin extending through said apertures in said block and through any pair of apertures in said stems.
(21) The invention according to Claim 15 in which said means to adjust the vertical position of said wheels includes said stem having a plurality of spaced apart pairs of apertures therealong, said block having an aper-ture therethrough, and a support pin extending through said apertures in said block and through any pair of apertures in said stems.
(22) The invention according to Claim 16 in which said means to adjust the vertical position of said wheels includes said stem having a plurality of spaced apart pairs of apertures therealong, said block having an aper-ture therethrough, and a support pin extending through said apertures in said block and through any pair of apertures in said stems.
(23) The invention according to Claim 11 in which said means to adjust the vertical position of said wheels includes an annular shoulder around said bore at the upper end thereof and extending inwardly therefrom, said stem being hollow and having an annular shoulder extending outwardly from the lower end thereof, sealing means between said first mentioned shoulder and said stem and between said second mentioned shoulder and said block, and means to move said stem vertically relative to said block, said last mentioned means including a free floating piston reciprocal within said hollow stem, stop means along the length of the inner surface of said stem restricting the upward move-ment of said piston, a source of hydraulic fluid under pres-sure connected to said bore underneath said piston and means to retain said stem in the lowermost position within said bore when said piston, is at the bottom of said stem.
(24) The invention according to Claim 12 in which said means to adjust the vertical position of said wheels includes an annular shoulder around said bore at the upper end thereof and extending inwardly therefrom, said stem being hollow and having an annular shoulder extending outwardly from the lower end thereof, sealing means between said first mentioned shoulder and said stem and between said second mentioned shoulder and said block, and means to move said stem vertically relative to said block, said last mentioned means including a free floating piston reciprocal within said hollow stem, stop means along the length of the inner surface of said stem restricting the upward move-ment of said piston, a source of hydraulic fluid under pres-sure connected to said bore underneath said piston and means to retain said stem in the lowermost position within said bore when said piston is at the bottom of said stem.
(25) The invention according to Claim 13 in which said means to adjust the vertical position of said wheels includes an annular shoulder around said bore at the upper end thereof and extending inwardly therefrom, said stem being hollow and having an annular shoulder extending outwardly from the lower end thereof, sealing means between said first mentioned shoulder and said stem and between said second mentioned shoulder and said block, and means to move said stem vertically relative to said block, said last mentioned means including a free floating piston reciprocal within said hollow stem, stop means along the length of the inner surface of said stem restricting the upward move-ment of said piston, a source of hydraulic fluid under pres-sure connected to said bore underneath said piston and means to retain said stem in the lowermost position within said bore when said piston is at the bottom of said stem.
(26) The invention according to Claim 14 in which said means to adjust the vertical position of said wheels includes an annular shoulder around said bore at the upper end thereof and extending inwardly therefrom, said stem being hollow and having an annular shoulder extending outwardly from the lower end thereof, sealing means between said first mentioned shoulder and said stem and between said second mentioned shoulder and said block, and means to move said stem vertically relative to said block, said last mentioned means including a free floating piston reciprocal within said hollow stem, stop means along the length of the inner surface of said stem restricting the upward move-ment of said piston, a source of hydraulic fluid under pres-sure connected to said bore underneath said piston and means to retain said stem in the lowermost position within said bore when said piston is at the bottom of said stem.
(27) The invention according to Claim 15 in which said means to adjust the vertical position of said wheels includes an annular shoulder around said bore at the upper end thereof and extending inwardly therefrom, said stem being hollow and having an annular shoulder extending outwardly from the lower end thereof, sealing means between said first mentioned shoulder and said stem and between said second mentioned shoulder and said block, and means to move said stem vertically relative to said block, said last mentioned means including a free floating piston reciprocal within said hollow stem, stop means along the length of the inner surface of said stem restricting the upward move-ment of said piston, a source of hydraulic fluid under pres-sure connected to said bore underneath said piston and means to retain said stem in the lowermost position within said bore when said piston is at the bottom of said stem.
(28) The invention according to Claim 16 in which said means to adjust the vertical position of said wheels includes an annular shoulder around said bore at the upper end thereof and extending inwardly therefrom, said stem being hollow and having an annular shoulder extending outwardly from the lower end thereof, sealing means between said first mentioned shoulder and said stem and between said second mentioned shoulder and said block, and means to move said stem vertically relative to said block, said last mentioned means including a free floating piston reciprocal within said hollow stem, stop means along the length of the inner surface of said stem restricting the upward move-ment of said piston, a source of hydraulic fluid under pres-sure connected to said bore underneath said piston and means to retain said stem in the lowermost position within said bore when said piston is at the bottom of said stem.
(29) The invention according to Claim 17 in which said means to adjust the vertical position of said wheels includes an annular shoulder around said bore at the upper end thereof and extending inwardly therefrom, said stem being hollow and having an annular shoulder extending outwardly from the lower end thereof, sealing means between said first mentioned shoulder and said stem and between said second mentioned shoulder and said block, and means to move said stem vertically relative to said block, said last mentioned means including a free floating piston reciprocal within said hollow stem, stop means along the length of the inner surface of said stem restricting the upward move-ment of said piston, a source of hydraulic fluid under pres-sure connected to said bore underneath said piston and means to retain said stem in the lowermost position within said bore when said piston is at the bottom of said stem.
(30) The invention according to Claim 18 in which said means to adjust the vertical position of said wheels includes an annular shoulder around said bore at the upper end thereof and extending inwardly therefrom, said stem being hollow and having an annular shoulder extending outwardly from the lower end thereof, sealing means between said first mentioned shoulder and said stem and between said second mentioned shoulder and said block, and means to move said stem vertically relative to said block, said last mentioned means including a free floating piston reciprocal within said hollow stem, stop means along the length of the inner surface of said stem restricting the upward move-ment of said piston, a source of hydraulic fluid under pres-sure connected to said bore underneath said piston and means to retain said stem in the lowermost position within said bore when said piston is at the bottom of said stem.
(31) The invention according to Claim 19 in which said means to adjust the vertical position of said wheels includes an annular shoulder around said bore at the upper end thereof and extending inwardly therefrom, said stem being hollow and having an annular shoulder extending outwardly from the lower end thereof, sealing means between said first mentioned shoulder and said stem and between said second mentioned shoulder and said block, and means to move said stem vertically relative to said block, said last mentioned means including a free floating piston reciprocal within said hollow stem, stop means along the length of the inner surface of said stem restricting the upward move-ment of said piston, a source of hydraulic fluid under pres-sure connected to said bore underneath said piston and means to retain said stem in the lowermost position within said bore when said piston is at the bottom of said stem.
(32) The invention according to Claim 20 in which said means to adjust the vertical position of said wheels includes an annular shoulder around said bore at the upper end thereof and extending inwardly therefrom, said stem being hollow and having an annular shoulder extending outwardly from the lower end thereof, sealing means between said first mentioned shoulder and said stem and between said second mentioned shoulder and said block, and means to move said stem vertically relative to said block, said last mentioned means including a free floating piston reciprocal within said hollow stem, stop means along the length of the inner surface of said stem restricting the upward move-ment of said piston, a source of hydraulic fluid under pres-sure connected to said bore underneath said piston and means to retain said stem in the lowermost position within said bore when said piston is at the bottom of said stem.
(33) The invention according to Claim 21 in which said means to adjust the vertical position of said wheels includes an annular shoulder around said bore at the upper end thereof and extending inwardly therefrom, said stem being hollow and having an annular shoulder extending outwardly from the lower end thereof, sealing means between said first mentioned shoulder and said stem and between said second mentioned shoulder and said block, and means to move said stem vertically relative to said block, said last mentioned means including a free floating piston reciprocal within said hollow stem, stop means along the length of the inner surface of said stem restricting the upward move-ment of said piston, a source of hydraulic fluid under pres-sure connected to said bore underneath said piston and means to retain said stem in the lowermost position within said bore when said piston is at the bottom of said stem.
(34) The invention according to Claim 22 in which said means to adjust the vertical position of said wheels includes an annular shoulder around said bore at the upper end thereof and extending inwardly therefrom, said stem being hollow and having an annular shoulder extending outwardly from the lower end thereof, sealing means between said first mentioned shoulder and said stem and between said second mentioned shoulder and said block, and means to move said stem vertically relative to said block, said last mentioned means including a free floating piston reciprocal within said hollow stem, stop means along the length of the inner surface of said stem restricting the upward move-ment of said piston, a source of hydraulic fluid under pres-sure connected to said bore underneath said piston and means to retain said stem in the lowermost position within said bore when said piston is at the bottom of said stem.
(35) The invention according to Claims 23, 24 or 25 in which said last mentioned means includes at least one spring loaded pin within said shoulder at the base of said stem extending radially therefrom, a recess in said block adjacent said spring loaded pin, said spring loaded pin being normally urged inwardly, the base of said piston being chamfered whereby when said piston is in the lower-most position, said pin is extended outwardly into said recess and when said piston moves upwardly from said lower-most position, said pin retracts from said recess thereby freeing said stem for upward movement, and means to pre-load said piston upon the upper side thereof.
(36) The invention according to Claims 26, 27 or 28 in which said last mentioned means includes at least one spring loaded pin within said shoulder at the base of said stem extending radially therefrom, a recess in said block adjacent said spring loaded pin, said spring loaded pin being normally urged inwardly, the base of said piston being chamfered whereby when said piston is in the lower-most position, said pin is extended outwardly into said recess and when said piston moves upwardly from said lower-most position, said pin retracts from said recess thereby freeing said stem for upward movement, and means to pre-load said piston upon the upper side thereof.
(37) The invention according to Claims 29, 30 or 31 in which said last mentioned means includes at least one spring loaded pin within said shoulder at the base of said stem extending radially therefrom, a recess in said block adjacent said spring loaded pin, said spring loaded pin being normally urged inwardly, the base of said piston being chamfered whereby when said piston is in the lower-most position, said pin is extended outwardly into said recess and when said piston moves upwardly from said lower-most position, said pin retracts from said recess thereby freeing said stem for upward movement, and means to pre-load said piston upon the upper side thereof.
(38) The invention according to Claims 32, 33 or 34 in which said last mentioned means includes at least one spring loaded pin within said shoulder at the base of said stem extending radially therefrom, a recess in said block adjacent said spring loaded pin, said spring loaded pin being normally urged inwardly, the base of said piston being chamfered whereby when said piston is in the lower-most position, said pin is extended outwardly into said recess and when said piston moves upwardly from said lower-most position, said pin retracts from said recess thereby freeing said stem for upward movement, and means to pre-load said piston upon the upper side thereof.
(1) A wheel-ski assembly for aircraft comprising in combination a substantially planar, elongate base portion having an upturned front end, a wheel channel formed through said base portion spaced rearwardly from the front end thereof, a pair of spaced and parallel longitudinally ex-tending beams secured to the upper side of said base por-tion one adjacent each side edge thereof, a wheel mounting assembly in said beams, one upon each side of said wheel channel, an axle spanning said wheel mounting assemblies and a ground engaging wheel mounted on said axle; each of said wheel mounting assemblies including a saddle compon-ent over said beam and secured thereto, a mounting block extending vertically through said saddle and said beam and being secured thereto and an axle support in said mounting block and extending upwardly therefrom, said axle engaging said axle support, said mounting block including a vertical bore formed therein, said axle support including a vertical stem engageable within said bore and means to secure same therein, and bearing means on the upper end of said stem to receive said wheel axle.
(2) The invention according to Claim 1 in which said stem is adjustable vertically within limits, within said bore thereby controlling the penetration of the peri-phery of said wheel relative to the underside of said base portion.
(3) The invention according to Claim 1 in which said base portion is bifurcated at the rear portion there-of thereby forming a pair of spaced and parallel rearwardly extending side portions defining said wheel channel there-between, each of said beams extending along one of said side portions.
(4) The invention according to Claim 2 in which said base portion is bifurcated at the rear portion there-of thereby forming a pair of spaced and parallel rearwardly extending side portions defining said wheel channel there-between, each of said beams extending along one of said side portions.
(5) The invention according to Claim 3 which in-cludes a spreader bar assembly extending transversely between said side portions adjacent the rear ends thereof.
(6) The invention according to Claim 4 which in-cludes a spreader bar assembly extending transversely between said side portions adjacent the rear ends thereof.
(7) The invention according to Claim 3 which in-cludes a bogie wheel journalled for rotation adjacent the end of each of said side portions and on the inner side thereof, the lower periphery of said bogie wheels extending below the underside of said side portions of said base.
(8) The invention according to Claim 4 which in-cludes a bogie wheel journalled for rotation adjacent the end of each of said side portions and on the inner side thereof, the lower periphery of said bogie wheels extending below the underside of said side portions of said base.
(9) The invention according to Claim 5 which in-cludes a bogie wheel journalled for rotation adjacent the end of each of said side portions and on the inner side thereof, the lower periphery of said bogie wheels extending below the underside of said side portions of said base.
(10) The invention according to Claim 6 which in-cludes a bogie wheel journalled for rotation adjacent the end of each of said side portions and on the inner side thereof, the lower periphery of said bogie wheels extending below the underside of said side portions of said base.
(11) The invention according to Claim 1 which includes means to adjust the vertical position of said wheel within limits relative to said base.
(12) The invention according to Claim 2 which includes means to adjust the vertical position of said wheel within limits relative to said base.
(13) The invention according to Claim 3 which includes means to adjust the vertical position of said wheel within limits relative to said base.
(14) The invention according to Claim 5 which includes means to adjust the vertical position of said wheel within limits relative to said base.
(15) The invention according to Claim 9 which includes means to adjust the vertical position of said wheel within limits relative to said base.
(16) The invention according to Claim 10 which includes means to adjust the vertical position of said wheel within limits relative to said base.
(17) The invention according to Claim 11 in which said means to adjust the vertical position of said wheels includes said stem having a plurality of spaced apart pairs of apertures therealong, said block having an aper-ture therethrough, and a support pin extending through said apertures in said block and through any pair of apertures in said stems.
(18) The invention according to Claim 12 in which said means to adjust the vertical position of said wheels includes said stem having a plurality of spaced apart pairs of apertures therealong, said block having an aper-ture therethrough, and a support pin extending through said apertures in said block and through any pair of apertures in said stems.
(19) The invention according to Claim 13 in which said means to adjust the vertical position of said wheels includes said stem having a plurality of spaced apart pairs of apertures therealong, said block having an aper-ture therethrough, and a support pin extending through said apertures in said block and through any pair of apertures in said stems.
(20) The invention according to Claim 14 in which said means to adjust the vertical position of said wheels includes said stem having a plurality of spaced apart pairs of apertures therealong, said block having an aper-ture therethrough, and a support pin extending through said apertures in said block and through any pair of apertures in said stems.
(21) The invention according to Claim 15 in which said means to adjust the vertical position of said wheels includes said stem having a plurality of spaced apart pairs of apertures therealong, said block having an aper-ture therethrough, and a support pin extending through said apertures in said block and through any pair of apertures in said stems.
(22) The invention according to Claim 16 in which said means to adjust the vertical position of said wheels includes said stem having a plurality of spaced apart pairs of apertures therealong, said block having an aper-ture therethrough, and a support pin extending through said apertures in said block and through any pair of apertures in said stems.
(23) The invention according to Claim 11 in which said means to adjust the vertical position of said wheels includes an annular shoulder around said bore at the upper end thereof and extending inwardly therefrom, said stem being hollow and having an annular shoulder extending outwardly from the lower end thereof, sealing means between said first mentioned shoulder and said stem and between said second mentioned shoulder and said block, and means to move said stem vertically relative to said block, said last mentioned means including a free floating piston reciprocal within said hollow stem, stop means along the length of the inner surface of said stem restricting the upward move-ment of said piston, a source of hydraulic fluid under pres-sure connected to said bore underneath said piston and means to retain said stem in the lowermost position within said bore when said piston, is at the bottom of said stem.
(24) The invention according to Claim 12 in which said means to adjust the vertical position of said wheels includes an annular shoulder around said bore at the upper end thereof and extending inwardly therefrom, said stem being hollow and having an annular shoulder extending outwardly from the lower end thereof, sealing means between said first mentioned shoulder and said stem and between said second mentioned shoulder and said block, and means to move said stem vertically relative to said block, said last mentioned means including a free floating piston reciprocal within said hollow stem, stop means along the length of the inner surface of said stem restricting the upward move-ment of said piston, a source of hydraulic fluid under pres-sure connected to said bore underneath said piston and means to retain said stem in the lowermost position within said bore when said piston is at the bottom of said stem.
(25) The invention according to Claim 13 in which said means to adjust the vertical position of said wheels includes an annular shoulder around said bore at the upper end thereof and extending inwardly therefrom, said stem being hollow and having an annular shoulder extending outwardly from the lower end thereof, sealing means between said first mentioned shoulder and said stem and between said second mentioned shoulder and said block, and means to move said stem vertically relative to said block, said last mentioned means including a free floating piston reciprocal within said hollow stem, stop means along the length of the inner surface of said stem restricting the upward move-ment of said piston, a source of hydraulic fluid under pres-sure connected to said bore underneath said piston and means to retain said stem in the lowermost position within said bore when said piston is at the bottom of said stem.
(26) The invention according to Claim 14 in which said means to adjust the vertical position of said wheels includes an annular shoulder around said bore at the upper end thereof and extending inwardly therefrom, said stem being hollow and having an annular shoulder extending outwardly from the lower end thereof, sealing means between said first mentioned shoulder and said stem and between said second mentioned shoulder and said block, and means to move said stem vertically relative to said block, said last mentioned means including a free floating piston reciprocal within said hollow stem, stop means along the length of the inner surface of said stem restricting the upward move-ment of said piston, a source of hydraulic fluid under pres-sure connected to said bore underneath said piston and means to retain said stem in the lowermost position within said bore when said piston is at the bottom of said stem.
(27) The invention according to Claim 15 in which said means to adjust the vertical position of said wheels includes an annular shoulder around said bore at the upper end thereof and extending inwardly therefrom, said stem being hollow and having an annular shoulder extending outwardly from the lower end thereof, sealing means between said first mentioned shoulder and said stem and between said second mentioned shoulder and said block, and means to move said stem vertically relative to said block, said last mentioned means including a free floating piston reciprocal within said hollow stem, stop means along the length of the inner surface of said stem restricting the upward move-ment of said piston, a source of hydraulic fluid under pres-sure connected to said bore underneath said piston and means to retain said stem in the lowermost position within said bore when said piston is at the bottom of said stem.
(28) The invention according to Claim 16 in which said means to adjust the vertical position of said wheels includes an annular shoulder around said bore at the upper end thereof and extending inwardly therefrom, said stem being hollow and having an annular shoulder extending outwardly from the lower end thereof, sealing means between said first mentioned shoulder and said stem and between said second mentioned shoulder and said block, and means to move said stem vertically relative to said block, said last mentioned means including a free floating piston reciprocal within said hollow stem, stop means along the length of the inner surface of said stem restricting the upward move-ment of said piston, a source of hydraulic fluid under pres-sure connected to said bore underneath said piston and means to retain said stem in the lowermost position within said bore when said piston is at the bottom of said stem.
(29) The invention according to Claim 17 in which said means to adjust the vertical position of said wheels includes an annular shoulder around said bore at the upper end thereof and extending inwardly therefrom, said stem being hollow and having an annular shoulder extending outwardly from the lower end thereof, sealing means between said first mentioned shoulder and said stem and between said second mentioned shoulder and said block, and means to move said stem vertically relative to said block, said last mentioned means including a free floating piston reciprocal within said hollow stem, stop means along the length of the inner surface of said stem restricting the upward move-ment of said piston, a source of hydraulic fluid under pres-sure connected to said bore underneath said piston and means to retain said stem in the lowermost position within said bore when said piston is at the bottom of said stem.
(30) The invention according to Claim 18 in which said means to adjust the vertical position of said wheels includes an annular shoulder around said bore at the upper end thereof and extending inwardly therefrom, said stem being hollow and having an annular shoulder extending outwardly from the lower end thereof, sealing means between said first mentioned shoulder and said stem and between said second mentioned shoulder and said block, and means to move said stem vertically relative to said block, said last mentioned means including a free floating piston reciprocal within said hollow stem, stop means along the length of the inner surface of said stem restricting the upward move-ment of said piston, a source of hydraulic fluid under pres-sure connected to said bore underneath said piston and means to retain said stem in the lowermost position within said bore when said piston is at the bottom of said stem.
(31) The invention according to Claim 19 in which said means to adjust the vertical position of said wheels includes an annular shoulder around said bore at the upper end thereof and extending inwardly therefrom, said stem being hollow and having an annular shoulder extending outwardly from the lower end thereof, sealing means between said first mentioned shoulder and said stem and between said second mentioned shoulder and said block, and means to move said stem vertically relative to said block, said last mentioned means including a free floating piston reciprocal within said hollow stem, stop means along the length of the inner surface of said stem restricting the upward move-ment of said piston, a source of hydraulic fluid under pres-sure connected to said bore underneath said piston and means to retain said stem in the lowermost position within said bore when said piston is at the bottom of said stem.
(32) The invention according to Claim 20 in which said means to adjust the vertical position of said wheels includes an annular shoulder around said bore at the upper end thereof and extending inwardly therefrom, said stem being hollow and having an annular shoulder extending outwardly from the lower end thereof, sealing means between said first mentioned shoulder and said stem and between said second mentioned shoulder and said block, and means to move said stem vertically relative to said block, said last mentioned means including a free floating piston reciprocal within said hollow stem, stop means along the length of the inner surface of said stem restricting the upward move-ment of said piston, a source of hydraulic fluid under pres-sure connected to said bore underneath said piston and means to retain said stem in the lowermost position within said bore when said piston is at the bottom of said stem.
(33) The invention according to Claim 21 in which said means to adjust the vertical position of said wheels includes an annular shoulder around said bore at the upper end thereof and extending inwardly therefrom, said stem being hollow and having an annular shoulder extending outwardly from the lower end thereof, sealing means between said first mentioned shoulder and said stem and between said second mentioned shoulder and said block, and means to move said stem vertically relative to said block, said last mentioned means including a free floating piston reciprocal within said hollow stem, stop means along the length of the inner surface of said stem restricting the upward move-ment of said piston, a source of hydraulic fluid under pres-sure connected to said bore underneath said piston and means to retain said stem in the lowermost position within said bore when said piston is at the bottom of said stem.
(34) The invention according to Claim 22 in which said means to adjust the vertical position of said wheels includes an annular shoulder around said bore at the upper end thereof and extending inwardly therefrom, said stem being hollow and having an annular shoulder extending outwardly from the lower end thereof, sealing means between said first mentioned shoulder and said stem and between said second mentioned shoulder and said block, and means to move said stem vertically relative to said block, said last mentioned means including a free floating piston reciprocal within said hollow stem, stop means along the length of the inner surface of said stem restricting the upward move-ment of said piston, a source of hydraulic fluid under pres-sure connected to said bore underneath said piston and means to retain said stem in the lowermost position within said bore when said piston is at the bottom of said stem.
(35) The invention according to Claims 23, 24 or 25 in which said last mentioned means includes at least one spring loaded pin within said shoulder at the base of said stem extending radially therefrom, a recess in said block adjacent said spring loaded pin, said spring loaded pin being normally urged inwardly, the base of said piston being chamfered whereby when said piston is in the lower-most position, said pin is extended outwardly into said recess and when said piston moves upwardly from said lower-most position, said pin retracts from said recess thereby freeing said stem for upward movement, and means to pre-load said piston upon the upper side thereof.
(36) The invention according to Claims 26, 27 or 28 in which said last mentioned means includes at least one spring loaded pin within said shoulder at the base of said stem extending radially therefrom, a recess in said block adjacent said spring loaded pin, said spring loaded pin being normally urged inwardly, the base of said piston being chamfered whereby when said piston is in the lower-most position, said pin is extended outwardly into said recess and when said piston moves upwardly from said lower-most position, said pin retracts from said recess thereby freeing said stem for upward movement, and means to pre-load said piston upon the upper side thereof.
(37) The invention according to Claims 29, 30 or 31 in which said last mentioned means includes at least one spring loaded pin within said shoulder at the base of said stem extending radially therefrom, a recess in said block adjacent said spring loaded pin, said spring loaded pin being normally urged inwardly, the base of said piston being chamfered whereby when said piston is in the lower-most position, said pin is extended outwardly into said recess and when said piston moves upwardly from said lower-most position, said pin retracts from said recess thereby freeing said stem for upward movement, and means to pre-load said piston upon the upper side thereof.
(38) The invention according to Claims 32, 33 or 34 in which said last mentioned means includes at least one spring loaded pin within said shoulder at the base of said stem extending radially therefrom, a recess in said block adjacent said spring loaded pin, said spring loaded pin being normally urged inwardly, the base of said piston being chamfered whereby when said piston is in the lower-most position, said pin is extended outwardly into said recess and when said piston moves upwardly from said lower-most position, said pin retracts from said recess thereby freeing said stem for upward movement, and means to pre-load said piston upon the upper side thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000359984A CA1143353A (en) | 1980-09-09 | 1980-09-09 | Wheel-ski assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000359984A CA1143353A (en) | 1980-09-09 | 1980-09-09 | Wheel-ski assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1143353A true CA1143353A (en) | 1983-03-22 |
Family
ID=4117848
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000359984A Expired CA1143353A (en) | 1980-09-09 | 1980-09-09 | Wheel-ski assembly |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1143353A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8915501B2 (en) | 2012-06-27 | 2014-12-23 | Scierie Bois St—Francois Inc. | Wheel-ski system for a vehicle |
-
1980
- 1980-09-09 CA CA000359984A patent/CA1143353A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8915501B2 (en) | 2012-06-27 | 2014-12-23 | Scierie Bois St—Francois Inc. | Wheel-ski system for a vehicle |
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