公开(公告)号：US4273498A

公开(公告)日：1981-06-16

申请号：US92439

申请日：1979-11-07

Applicant: William W. Dickhart, III ,  Richard H. Marvin

Inventor： William W. Dickhart, III ,  Richard H. Marvin

IPC: B60R3/00 ,  A61G3/06 ,  B60P3/00 ,  B61D23/00 ,  B61D47/00 ,  B60P1/44 ,  B60P3/06 ,  B61D3/06

CPC classification number: B61D47/00 ,  A61G3/062 ,  B61D23/00 ,  A61G2220/12 ,  Y10S414/134

Abstract: A railway car includes conventional steps leading from a lower station platform to the floor level in a vestibule. A lift platform adapted to receive a seat or wheel chair is provided to lift a handicapped person who has difficulty going up or down steps. A motor is provided for moving the lift platform over the steps between the lower level and floor level while maintaining it in a horizontal position.

Abstract translation: 铁路车辆包括从前台站平台前进到前庭楼层的常规步骤。 提供适于接收座椅或轮椅的升降平台，以提升难度上升或下降步骤的残疾人。 提供电动机用于在升降平台在水平位置上保持水平位置时将升降平台移动到较低水位和地板水平面之间的台阶上。

公开(公告)号：US4295428A

公开(公告)日：1981-10-20

申请号：US29720

申请日：1979-04-13

Applicant: William W. Dickhart, III ,  Richard H. Marvin

Inventor： William W. Dickhart, III ,  Richard H. Marvin

IPC: B61F5/40 ,  B61F3/04 ,  B61F5/38 ,  B61F5/44 ,  B61F3/08 ,  B61F5/20 ,  B61F5/30

CPC classification number: B61F3/04 ,  B61F5/38 ,  B61F5/44

Abstract: A forced steering mechanism is connected to a truck to steer an axle and associated wheels. Coupling means are provided for loosely connecting the car body of a vehicle to the truck and the forced steering mechanism. The coupling means permits relative lateral movement between the car body and truck while maintaining the forced steering mechanism in a position so as to permit self steering, but no forced steering when the vehicle is moving over tangent or rectilinear tracks. At the same time the degree of such lateral movement and amount of self steering is limited. The coupling means causes the forced steering mechanism to become operative when the vehicle is moving over sharply curved tracks.

Abstract translation: 强制转向机构连接到卡车以转向轴和相关联的车轮。 提供了用于将车辆的车身松散地连接到卡车和强制转向机构的联接装置。 联接装置允许车身和卡车之间的相对横向运动，同时将强制转向机构保持在允许自行转向的位置，但是当车辆在切线或直线轨道上移动时没有强制转向。 同时，这种侧向运动的程度和自动转向的数量是有限的。 当车辆在急剧弯曲的轨道上移动时，联接装置使得强制转向机构变得可操作。

公开(公告)号：US4621756A

公开(公告)日：1986-11-11

申请号：US627303

申请日：1984-07-02

Applicant: Michael K. Bullock ,  Dennis R. Hedrick ,  Richard H. Marvin ,  Edmund H. James, III

Inventor： Michael K. Bullock ,  Dennis R. Hedrick ,  Richard H. Marvin ,  Edmund H. James, III

IPC: B65H20/20 ,  B41J15/04 ,  B41J15/16 ,  B65H5/06 ,  B65H20/36 ,  B65H23/038 ,  B65H27/00 ,  B65H20/02 ,  B65H20/40 ,  B65H23/14

CPC classification number: B41J15/16

Abstract: A printer includes a print mechanism for performing printing operations and a print medium feeding mechanism for feeding a print medium past the print mechanism so that printing operations can be performed on the print medium. The print medium feeding mechanism includes a forward feed apparatus located downstream of the print mechanism for feeding the print medium in the forward direction past the print mechanism and a print medium tensioning apparatus. The tensioning apparatus includes at least one pair of pressure wheels rotatably mounted on the frame and located on opposite sides of a print medium being fed by the forward feed apparatus and means for restricting the rotation of at least one of the pressure wheels, whereby the pressure wheels exert a retarding force on the print medium tending to tension the print medium. Each pressure wheel is constructed so that it is flexible in the axial direction so as to permit lateral movement of a print medium as it passes between the pair of pressure wheels.The print medium feeding mechanism also includes drive means for rotating at least one of the pressure wheels in the reverse direction so as to provide for reverse feed of the print medium. This drive means is coupled through a one way coupling so as not to affect the ability of the pressure wheel to rotate during forward feed of the print medium.

Abstract translation: 打印机包括用于执行打印操作的打印机构和用于将打印介质馈送通过打印机构的打印介质进给机构，使得能够对打印介质进行打印操作。 打印介质进给机构包括位于打印机构下游的用于沿打印机构向前方传送打印介质的正向进给装置和打印介质张紧装置。 张紧装置包括至少一对压力轮，其可旋转地安装在框架上并且位于由正向进给装置供给的打印介质的相对侧上，以及用于限制至少一个压力轮的旋转的装置，由此压力 轮对打印介质施加阻滞力，倾向于张紧打印介质。 每个压力轮被构造成使得其在轴向方向上是柔性的，以便当打印介质通过一对压力轮之间时允许打印介质的横向运动。 打印介质进给机构还包括驱动装置，用于使相对方向上的至少一个压力轮旋转，以提供打印介质的反向进给。 该驱动装置通过单向连接联接，以便在打印介质的向前进给期间不影响压力轮旋转的能力。