US5134353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Equipment for transporting a load
Assignee: Daifuku Co Ltd
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Filing: 1991-06-25
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Granted: 1992-07-28
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Expires: 2011-06-25
Abstract
Abstract A load transport equipment having self-propelled trucks travelling on a predetermined route so as to transport a load by the truck, wherein an encoder is connected to a motor and the pulse number from the encoder is counted by a counter, the counted value being optically transmitted toward another self-propelled truck following the front self-propelled truck on the predetermined route, the following self-propelled truck receiving the counted value from the front self-propelled truck to obtain a difference between the received counted value and that of the following truck, so that the travel speed of the rear self-propelled truck is controlled on the basis of the difference so that the running speed is controlled in accordance with the distance between the trucks thereby preventing a rear-end collision.
Inventors
- 👤 Hiroaki Kita
- 👤 Koichi Murata
- 👤 Mamoru Nakano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:57
CPC Classifications
B; B60; B60L; B60L1/00; B61; B61L; B61L23/00; B61L23/34
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
126 words
Load transport equipment provided with a plurality of self-propelled trucks self-propelled along a predetermined route having a base point, said self-propelled trucks each having; means for detecting a distance between said self-propelled truck and said base point, means for transmitting-receiving the distance data between said self-propelled truck and another self-propelled truck behind and/or in front of said truck, and means for transmitting from said transmitting-receiving means the distance data detected by said detecting means, receiving by said transmitting and receiving means the distance data of said front self-propelled truck transmitted therefrom and obtaining a difference between said distance data of said rear self-propelled truck and front self-propelled truck, thereby driving said rear self-propelled truck at high speed when said difference is greater than a predetermined value.
Claim 2
Dependent Claim
126 words
Load transport equipment provided with a plurality of self-propelled trucks self-propelled along a predetermined route having a base point, said self-propelled trucks each having; means for detecting a distance between said self-propelled truck and said base point, means for transmitting-receiving the distance data between said self-propelled truck and another self-propelled truck behind and/or in front of said truck, and means for transmitting from said transmitting-receiving means the distance data detected by said detecting means, receiving by said transmitting and receiving means the distance data of said front self-propelled truck transmitted therefrom and obtaining a difference between said distance data of said rear self-propelled truck and front self-propelled truck, thereby driving said rear self-propelled truck at high speed when said difference is greater than a predetermined value.
Claim 3
Dependent Claim
223 words
Load transport equipment provided with a plurality of self-propelled trucks self-propelled along a predetermined route having a base point, said self-propelled trucks each having; means for detecting a distance between said self-propelled truck and said base point, means for transmitting-receiving the distance data between said self-propelled truck and another self-propelled truck behind and/or in front of said truck, means for transmitting from said transmitting-receiving means the distance data detected by said detecting means, receiving by said transmitting and receiving means the distance data of said front self-propelled truck transmitted therefrom and obtaining a difference between said distance data of said rear self-propelled truck and front self-propelled truck, means for computing a distance between said rear self-propelled truck and front self-propelled truck and a relative speed of said rear self-propelled truck in relation to said front self-propelled truck from said difference between said distance data, means for computing a stopping distance of said rear self-propelled truck at said relative speed and reducing the speed of said rear self-propelled truck when said stopping distance is greater than said distance between the trucks, and means for increasing the speed of said rear self-propelled truck when said relative speed of said rear self-propelled truck is less than zero, indicating that the travel speed of said rear self-propelled truck is less than that of said front self-propelled truck.
Claim 4
Dependent Claim
223 words
Load transport equipment provided with a plurality of self-propelled trucks self-propelled along a predetermined route having a base point, said self-propelled trucks each having; means for detecting a distance between said self-propelled truck and said base point, means for transmitting-receiving the distance data between said self-propelled truck and another self-propelled truck behind and/or in front of said truck, means for transmitting from said transmitting-receiving means the distance data detected by said detecting means, receiving by said transmitting and receiving means the distance data of said front self-propelled truck transmitted therefrom and obtaining a difference between said distance data of said rear self-propelled truck and front self-propelled truck, means for computing a distance between said rear self-propelled truck and front self-propelled truck and a relative speed of said rear self-propelled truck in relation to said front self-propelled truck from said difference between said distance data, means for computing a stopping distance of said rear self-propelled truck at said relative speed and reducing the speed of said rear self-propelled truck when said stopping distance is greater than said distance between the trucks, and means for increasing the speed of said rear self-propelled truck when said relative speed of said rear self-propelled truck is less than zero, indicating that the travel speed of said rear self-propelled truck is less than that of said front self-propelled truck.
Claim 5
Dependent Claim
219 words
Load transport equipment provided with a plurality of self-propelled trucks self-propelled along a predetermined route having a base point, said self-propelled trucks each having; means for detecting a distance between said self-propelled truck and said base point, means for computing a self-propelled speed of said self-propelled truck from said distance data, means for transmitting-receiving said self-propelled speed data and distance data between said self-propelled truck and another self-propelled truck behind and/or in front of said truck, means for comparing the self-propelled speed data and the distance data of said rear self-propelled truck with the self-propelled speed data and the distance data of said front self-propelled truck input from said transmitting-receiving means, thereby computing a distance between said rear self-propelled truck and front self-propelled truck and a relative speed of said rear self-propelled truck in relation to said front self-propelled truck, means for computing a stopping distance of said rear self-propelled truck at said relative speed and reducing the speed of said rear self-propelled truck when said stopping distance is greater than said distance between the trucks, and means for increasing the speed of said rear self-propelled truck when said relative speed of said rear self-propelled truck is less than zero, indicating that the travel speed of said rear self-propelled truck is less than that of said front self-propelled truck.
Claim 6
Dependent Claim
219 words
Load transport equipment provided with a plurality of self-propelled trucks self-propelled along a predetermined route having a base point, said self-propelled trucks each having; means for detecting a distance between said self-propelled truck and said base point, means for computing a self-propelled speed of said self-propelled truck from said distance data, means for transmitting-receiving said self-propelled speed data and distance data between said self-propelled truck and another self-propelled truck behind and/or in front of said truck, means for comparing the self-propelled speed data and the distance data of said rear self-propelled truck with the self-propelled speed data and the distance data of said front self-propelled truck input from said transmitting-receiving means, thereby computing a distance between said rear self-propelled truck and front self-propelled truck and a relative speed of said rear self-propelled truck in relation to said front self-propelled truck, means for computing a stopping distance of said rear self-propelled truck at said relative speed and reducing the speed of said rear self-propelled truck when said stopping distance is greater than said distance between the trucks, and means for increasing the speed of said rear self-propelled truck when said relative speed of said rear self-propelled truck is less than zero, indicating that the travel speed of said rear self-propelled truck is less than that of said front self-propelled truck.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-07-28 | 1996-01-27 | 1996-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-07-28 | 2000-01-27 | 2000-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-07-28 | 2004-01-27 | 2004-07-28 | $7700.00 | Window Closed / Lapsed |