US3738284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Longitudinally and transversally movable truck
Assignee: Komatsu Ltd
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Filing: 1971-04-23
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Granted: 1973-06-12
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Expires: 1991-04-23
Abstract
Abstract A longitudinally and transversally moving bolster truck is provided with two sets of wheels for use in the two different travelling directions respectively. Wheel lifting means are arranged to bring alternatively one set of wheels into contact with rails. Each of wheel lifting means comprises a wheel. The wheel is journaled in an arm pivoted on the body of the truck so as to permit vertical oscillation. Links are pivoted at the free end of said arm so as to permit oscillation in the same direction. A screw shaft which can be rotated by means of a motor is horizontally journaled in the body of the truck. Said links reciprocally engage at the free ends thereof with said screw shaft through a female screw member.
Inventors
- 👤 H Atsuta
- 👤 Y Koetsuka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:08
CPC Classifications
B; B30; B30B; B30B15/00; B30B15/02; B30B15/028; B21; B21D; B21D37/00; B21D37/14; B60; B60S; B60S9/00; B60S9/14; Y; Y10; Y10S; Y10S100/00; Y10S100/918
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
410 words
In a vehicle, frame means including a horizontal wall, a first set of rotary wheels carried by said frame means beneath said wall thereof and respectively having parallel axes of rotation, said first set of wheels supporting the vehicle for movement in a direction perpendicular to said axes of rotation, a second set of wheels having parallel axes of rotation perpendicular to the axes of rotation of said first set of wheels, said second set of whEels supporting the vehicle for movement in a direction perpendicular to the direction of movement provided by said first set of wheels, a plurality of lever means respectively supporting said second set of wheels for rotary movement, said plurality of lever means respectively being swingably carried by said frame means beneath said wall thereof at one end region of each of said lever means, said frame means supporting said plurality of lever means for swinging movement respectively about axes parallel to the axes of rotation of said second set of wheels, a plurality of link means pivotally connected respectively to said plurality of lever means at end regions thereof opposite from said end regions which are swingably carried by said frame means, a plurality of nuts pivotally connected respectively to said plurality of link means at end regions of the latter distant from said lever means, said nuts and link means being located beneath said wall of said frame means, a plurality of horizontally extending screw means respectively threaded through said nuts and extending beneath said wall of said frame means while supported thereby for rotary movement, said plurality of screw means when rotating advancing said nuts horizontally to act through the latter on said plurality of link means to bring about swinging of said plurality of lever means for lowering said second set of wheels to an elevation beneath said first set of wheels when the vehicle is to be supported on said second set of wheels and for raising said second set of wheels to an elevation higher than said first set of wheels when the vehicle is to be supported on said first set of wheels, and drive means operatively connected to said plurality of screw means for simultaneously rotating the latter to bring about simultaneous lowering of said second set of wheels when the vehicle is to travel thereon and simultaneous raising of said second set of wheels when the vehicle is to travel on said first set of wheels.
Claim 2
Dependent Claim
410 words
In a vehicle, frame means including a horizontal wall, a first set of rotary wheels carried by said frame means beneath said wall thereof and respectively having parallel axes of rotation, said first set of wheels supporting the vehicle for movement in a direction perpendicular to said axes of rotation, a second set of wheels having parallel axes of rotation perpendicular to the axes of rotation of said first set of wheels, said second set of whEels supporting the vehicle for movement in a direction perpendicular to the direction of movement provided by said first set of wheels, a plurality of lever means respectively supporting said second set of wheels for rotary movement, said plurality of lever means respectively being swingably carried by said frame means beneath said wall thereof at one end region of each of said lever means, said frame means supporting said plurality of lever means for swinging movement respectively about axes parallel to the axes of rotation of said second set of wheels, a plurality of link means pivotally connected respectively to said plurality of lever means at end regions thereof opposite from said end regions which are swingably carried by said frame means, a plurality of nuts pivotally connected respectively to said plurality of link means at end regions of the latter distant from said lever means, said nuts and link means being located beneath said wall of said frame means, a plurality of horizontally extending screw means respectively threaded through said nuts and extending beneath said wall of said frame means while supported thereby for rotary movement, said plurality of screw means when rotating advancing said nuts horizontally to act through the latter on said plurality of link means to bring about swinging of said plurality of lever means for lowering said second set of wheels to an elevation beneath said first set of wheels when the vehicle is to be supported on said second set of wheels and for raising said second set of wheels to an elevation higher than said first set of wheels when the vehicle is to be supported on said first set of wheels, and drive means operatively connected to said plurality of screw means for simultaneously rotating the latter to bring about simultaneous lowering of said second set of wheels when the vehicle is to travel thereon and simultaneous raising of said second set of wheels when the vehicle is to travel on said first set of wheels.
Claim 3
Dependent Claim
53 words
The combination of claim 1 and wherein said plurality of lever means respectively extend in a generally horizontal direction at an elevation lower than said plurality of screw means, and said plurality of link means respectively extending in a generally vertical direction from said plurality of lever means to said plurality of nuts.
Claim 4
Dependent Claim
33 words
The combination of claim 1 and wherein a torque-limiting means is operatively connected between said drive means and screw means for limiting the torque delivered from said drive means to said screw means.
Claim 5
Dependent Claim
67 words
The combination of claim 1 and wherein said plurality of screw means include at least one pair of coaxial screws and a coupling means releasably coupling said pair of coaxial screws to each other for angular adjustment one with respect to the other to adjust the elevation of at least one of said second set of wheels with respect to another of said second set of wheels.
Claim 6
Dependent Claim
57 words
The combination of claim 1 and wherein said drive means is electrical and wherein a limit switch means is situated in the path of movement of at least one of said link means for limiting the operation of said drive means and thus limiting the extent to which said second set of wheels are raised and lowered.
Claim 7
Dependent Claim
128 words
The combination of claim 1 and wherein a propelling means is operatively connected with both sets of wheels for rotating the latter to propel the vehicle, said propelling means including gear transmissions for both sets of wheels and one of said gear transmissions including at least a first gear coaxially fixed to one of said second set of wheels for rotation therewith and a second gear meshing with said first gear and having an axis of rotation coinciding with the axis of rotation of the lever means which carries that one of said second set of wheels to which said first gear is fixed, so that the transmission remains operatively connected to at least said one wheel of said second set of wheels during raising and lowering thereof.
References Cited (Backward Citations)
US1017290A
Cited
US3269744A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |