Construction of stabilised platform |
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| 申请号 | US28856072 | 申请日 | 1972-09-13 | 公开(公告)号 | US3840265A | 公开(公告)日 | 1974-10-08 |
| 申请人 | INST FOR IND RES & STANDARDS; | 发明人 | STIRLING J; COLGAN J; | ||||
| 摘要 | The platform is mounted for tilting about longitudinal and transverse axes, and a level sensor operates, through an actuator control, to effect operation of an actuator to continually maintain the platform in a horizontally stabilized position. The actuator is further mounted on a vertically extending variable height actuator which, through a motion sensor, maintains the platform at a constant height in space despite movement of the floor of the vehicle on which the platform may be mounted. Thereby a patient riding in an ambulance and lying on the platform is prevented from being subjected to various vibrations resulting from motion of the vehicle. | ||||||
| 权利要求 | 1. A stabilised platform for mounting in a vehicle comprising: a base platform; pivot means supporting the base platform so as to allow the base platform to tilt about a longitudinal axis and a horizontal axis; means controlling the tilt of the base platform in response to lateral forces; a vertical variable height actuator supporting the base platform in a vehicle and comprising a double acting force-balanced pneumatic cylinder; a motion sensor operatively connected between the height actuator and the floor of the vehicle; and means causing the height actuator to raise or lower the base platform in opposition to the motion of the floor. 2. A stabilized platform as claimed in claim 1 in which the means controlling the tilt of the base platform about each axis comprises a tilt actuator; a level sensor; and control means operatively connected between the tilt actuator and the level sensor whereby the resultant forces of gravity and lateral forces acts downwards at right angles to the base platform. 3. A stabilised platform as claimed in claim 2 in which the control means controlling the tilt of the base platform about each axis comprises a double acting force balances pneumatic cylinder. |
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