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    • 1. 发明授权
    • Knock-down open riser stairway
    • 敲门打开立管楼梯
    • US4106591A
    • 1978-08-15
    • US787089
    • 1977-04-13
    • Allen CohenHoward CohenRonald Cohen
    • Allen CohenHoward CohenRonald Cohen
    • E04F11/028E04F11/12
    • E04F11/028
    • A stairway capable of being shipped in a knock-down condition and erected with a minimum of labor and without special tools is disclosed. The stairway comprises a square tubular elongated support member having mounting brackets at each end enabling it to be mounted in inclined relation between different levels of a structure. A plurality of step assemblies are clamped in spaced relation onto the support member. Each step assembly includes a tread support having a horizontal load bearing portion and an angulated integral strut portion both fastened to a mounting flange which engages the topside of the support member. A locking sleeve surrounds the bottom and side walls of the support member and has outturned flanges which are fastened to the mounting plate by bolts. In one embodiment, the bottom of the locking sleeve has a slight upward convexity which flexes elastically when the bolts are tightened to maintain clamping pressure against the support member. In another embodiment the bottom of the locking sleeve engages flush against the bottom of the support member and the locking sleeve flanges are spaced from the mounting flange and flexed to provide the clamping action.
    • 公开了能够以击倒状态运输并且以最少劳动力并且没有专用工具架设的楼梯。 楼梯包括一个方形管状细长的支撑件,每个端部都有安装支架,使其能够以不同层次的结构之间的倾斜关系安装。 多个台阶组件被间隔地夹紧在支撑构件上。 每个步骤组件包括具有水平承载部分和角度一体的支柱部分的胎面支撑件,两者均固定到与支撑构件的顶侧接合的安装凸缘。 锁定套筒围绕支撑构件的底壁和侧壁,并且具有通过螺栓紧固到安装板的翻转凸缘。 在一个实施例中,锁定套筒的底部具有稍微向上的凸起,当螺栓被紧固时,该弹性弹性地弯曲以保持对支撑构件的夹持压力。 在另一个实施例中,锁定套筒的底部与支撑构件的底部相接合,并且锁定套筒凸缘与安装凸缘间隔开并弯曲以提供夹紧动作。
    • 10. 发明授权
    • Filtering suction nozzle
    • 过滤吸嘴
    • US5078603A
    • 1992-01-07
    • US410914
    • 1989-09-22
    • Howard Cohen
    • Howard Cohen
    • A61C17/08A61M1/00
    • A61C17/043A61M1/008A61M1/0056
    • A filtering suction nozzle particularly adapted for use in connection with a dental or medical suction system. The nozzle is suited for use as a high speed suction tip and/or a saliva ejector formed of an elongate tube defining a fluid flow path therethrough. Filtering means are arranged within the tube in the flow path of any fluid passing therethrough, and coupling means are arranged at one end of the tube to connect the tube to a suction line from a suction source. The tube may be formed with flexible pleats to facilitate bending. According to the method of the invention, filtering means are arranged in the flow path of any existing suction nozzles to thereby reduce debris collection in the suction system and minimize possible patient infection from previously collected debris.
    • 特别适用于牙科或医疗吸引系统的过滤吸嘴。 该喷嘴适合用作高速吸嘴和/或唾液喷射器,其由限定通过其的流体流动通道的细长管形成。 过滤装置设置在通过其中的任何流体的流动路径内的管内,并且联接装置布置在管的一端以将管连接到来自吸入源的吸入管线。 管可以形成有柔性褶以便于弯曲。 根据本发明的方法,过滤装置布置在任何现有抽吸喷嘴的流动路径中,从而减少抽吸系统中的碎屑收集,并将来自先前收集的碎片的可能的患者感染减到最小。