IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0604990
(2003-08-29)
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발명자
/ 주소 |
- Kozma, Timothy Grant
- Justice, Joseph B.
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대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
8 인용 특허 :
3 |
초록
▼
An aircraft ground power unit (GPU) is equipped with a device that warns personnel with a flashing light and a siren when the unsafe condition exists of the GPU being connected to both the tug and the aircraft at the same time. Similar devices can be used on other towed vehicles that can cause damag
An aircraft ground power unit (GPU) is equipped with a device that warns personnel with a flashing light and a siren when the unsafe condition exists of the GPU being connected to both the tug and the aircraft at the same time. Similar devices can be used on other towed vehicles that can cause damage to vehicles or structures if towed away while still attached to the vehicle or structure.
대표청구항
▼
1. On a service vehicle having a means for attaching to a towing vehicle and a means for attaching to an article, an attachment warning apparatus, comprising:a source of electric power; an alarm; means for detecting attachment of the service vehicle to the towing vehicle; means for detecting attachm
1. On a service vehicle having a means for attaching to a towing vehicle and a means for attaching to an article, an attachment warning apparatus, comprising:a source of electric power; an alarm; means for detecting attachment of the service vehicle to the towing vehicle; means for detecting attachment of the service vehicle to the article; and means for actuating the alarm when both the towing vehicle detection means detects a towing vehicle and the article detection means detects an article. 2. The attachment warning apparatus of claim 1, wherein:said towing vehicle detection means further comprises a first switch mounted on said towing vehicle attachment means; said article detection means comprises a second switch mounted on a receiver for said article attachment means, the receiver being mounted on said service vehicle; and said means for actuating said alarm comprises an electric circuit containing said source of electric power connected in series with said alarm, the first switch, and the second switch. 3. The attachment warning apparatus of claim 2, wherein:said first switch is normally closed and is opened when said towing vehicle attachment means is detached from said towing vehicle; said second switch is normally closed and is opened when said article attachment means is attached to said receiver. 4. The attachment warning apparatus of claim 3, wherein:said service vehicle is an aircraft ground power unit; said article is an aircraft; said towing vehicle attachment means is a towbar, the towbar being in a first position when attached to said towing vehicle and in a second position when not attached to said towing vehicle, said first switch being opened by the towbar in the second position; said article attachment means is a ground power unit plug; and said receiver is a holster shaped to accept the plug and having said second switch affixed thereto so that said second switch is opened by the plug inserted into the holster. 5. The attachment warning apparatus of claim 4, wherein:said alarm is an electric light and an electric horn connected in parallel to each other. 6. The attachment warning apparatus of claim 5, wherein:said electric light is a strobe light. 7. On an aircraft ground power unit having a towbar; a battery, an umbilical cord, and an aircraft attachment plug on the end of the umbilical cord, an apparatus for alarming the simultaneous connection of the towbar to a towing vehicle and the plug to an aircraft, comprising;a first switch affixed to the ground power unit in an orientation that opens the switch when the towbar is not connected to the towing vehicle; a holster affixed to the ground power unit, the holster having a cavity, the cavity having internal walls and shaped to hold the plug when it is not attached to the aircraft; a second switch affixed to the holster through one of the internal walls in an orientation that opens the second switch when the plug is inserted into the cavity; and an alarm wired in series with the battery, the first switch, and the second switch, the alarm consisting of either: a) a light, b) a horn, or c) both a light and a horn. 8. A service vehicle capable of being towed, comprising:means for attachment to a towing vehicle; means for attachment to an article being serviced; a source of electric power; an alarm; means for detecting attachment of the service vehicle to the towing vehicle; means for detecting attachment of the service vehicle to the article; and means for actuating the alarm when both the towing vehicle detection means detects a towing vehicle and the article detection means detects an article. 9. The service vehicle of claim 8, wherein:said towing vehicle detection means further comprises a first switch mounted on said towing vehicle attachment means; said article detection means comprises a second switch mounted on a receiver for said article attachment means, the receiver being mounted on the service vehicle; and said means for actuating said alarm comprises an electric circuit containing said source of electric power connected in series with said alarm, the first switch, and the second switch. 10. The service vehicle of claim 9, wherein:said first switch is normally closed and is opened when said towing vehicle attachment means is detached from said towing vehicle; said second switch is normally closed and is opened when said article attachment means is attached to said receiver. 11. The service vehicle of claim 10, wherein:the service vehicle is an aircraft ground power unit; said article is an aircraft; said towing vehicle attachment means is a towbar, the towbar being in a horizontal position when attached to said towing vehicle and in a vertical position when not attached to said towing vehicle, said first switch being opened by the towbar in the vertical position; said article attachment means is a ground power unit plug; and said receiver is a holster shaped to accept the plug and having said second switch affixed thereto so that said second switch is opened by the plug inserted into the holster. 12. The service vehicle of claim 11, wherein:said alarm is an electric light and an electric horn connected in parallel. 13. The service vehicle of claim 12, wherein:said electric light is a strobe light. 14. An aircraft ground power unit capable of being towed by a towing vehicle, the ground power unit having a towbar;a battery, an umbilical cord, and an aircraft attachment plug on the end of the umbilical cord, the ground power unit further comprising; a first switch affixed to the ground power unit in an orientation that opens the switch when the towbar is not connected to the towing vehicle; a holster affixed to the ground power unit, the holster having a cavity, the cavity having internal walls and shaped to hold the plug when it is not attached to the aircraft; a second switch affixed to the holster through one of the internal walls in an orientation that opens the second switch when the plug is inserted into the cavity; and an alarm wired in series with the battery, the first switch, and the second switch, the alarm consisting of either: a) a light, b) a horn, or c) both a light and a horn.
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