Cylinder with two concentric pistons actuated by a pressure medium and
extending to three times the length of the cylinder
    1.
    发明授权
    Cylinder with two concentric pistons actuated by a pressure medium and extending to three times the length of the cylinder 失效
    具有由压力介质致动并延伸到气缸长度的三倍的两个同心活塞的气缸

    公开(公告)号:US4991493A

    公开(公告)日:1991-02-12

    申请号:US303762

    申请日:1989-01-23

    申请人: Matti N. Luojus

    发明人: Matti N. Luojus

    CPC分类号: F15B15/16

    摘要: The invention concerns a cylinder-piston combination actuated by a pressure medium, comprising an outstretched cylinder space (1) and a two-part piston assembly (3, 8) movable in opposite directions in the longitudinal direction of the cylinder space (1). The piston rod (6) of the first part (3) of the piston assembly is of a tubular construction. The first part (3) is provided with a sealing between the piston (4) and the inner surface (2) of the cylinder space (1). The cylinder space (1) is provided with a connection (27) through which the pressure medium can be passed into the space (31) limited by the cylinder space (1) and the outer surface of the first part (3). The second part (8) is constructed to dimensions allowing it to fit inside the first part (3) and arranged to be movable relative to the latter. The combination includes an auxiliary piston (14) fitted around the piston rod (13) of the second part and sealed relative to the inner surface (2) of the cylinder space (1). The cylinder space is provided with a connection (25) permitting the passage of the pressure medium into the space (29) limited by the cylinder space (1) and the auxiliary piston end face (20) facing away from the first part (3). The cylinder space (1) is provided with another connection (26) permitting the passage of the pressure medium to the auxiliary piston end face (21) facing towards the first part (3) when the piston (9) of the second part (8) is in engagement with the auxiliary piston (14).

    摘要翻译: PCT No.PCT / FI88 / 00075 Sec。 371日期1989年1月23日 102(e)日期1989年1月23日PCT提交1988年5月18日PCT公布。 公开号WO88 / 09441 日本公报1988年12月1日。本发明涉及一种由压力介质致动的气缸 - 活塞组合件,包括伸出的气缸空间(1)和两部分活塞组件(3,8),两个活塞组件可沿纵向方向 气缸空间(1)。 活塞组件的第一部分(3)的活塞杆(6)是管状结构。 第一部分(3)在活塞(4)和气缸空间(1)的内表面(2)之间设置有密封。 气缸空间(1)设置有连接件(27),压力介质可以通过该连接件进入由气缸空间(1)限定的空间(31)和第一部件(3)的外表面。 第二部分(8)被构造成允许其适配在第一部分(3)内并且布置成相对于第一部分(3)可移动的尺寸。 该组合件包括安装在第二部分的活塞杆(13)周围并相对于气缸空间(1)的内表面(2)密封的辅助活塞(14)。 气缸空间设置有允许压力介质通过由气缸空间(1)和辅助活塞端面(20)限制的空间(29)的连接(25),该空间(29)背离第一部分(3) 。 当第二部分(8)的活塞(9)与第二部分(8)的活塞(9)相对时,气缸空间(1)设置有允许压力介质通向辅助活塞端面(21) )与辅助活塞(14)接合。