公开(公告)号：US4412758A

公开(公告)日：1983-11-01

申请号：US265206

申请日：1981-05-19

申请人： Herbert Heitkamp ,  Walter Hohn

发明人： Herbert Heitkamp ,  Walter Hohn

IPC分类号： E21D9/06 ,  F15B11/22 ,  F15B11/08

CPC分类号： E21D9/0692

摘要： A tunnel knife shield has a support frame, and a plurality of knives positioned side-by-side on the support frame. Each of the knives is associated with a double-acting hydraulic ram, the rams being used for advancing the knives, and for causing the support frame to follow up the advance of the knives. Hydraulic control means are provided for controlling the extension and retraction of the rams. Each ram has first and second working chambers, pressurization of which is effective to extend and retract that ram. The hydraulic control means comprises respective first supply lines for supplying pressurized hydraulic fluid to the first working chambers, respective second supply lines for supplying pressurized hydraulic fluid to the second working chambers, and respective discharge lines for discharging hydraulic fluid from the first working chambers. Each discharge line is provided with a flow-regulation valve and a pilot-operated non-return valve. The flow-regulation valves control the rate of retraction of the rams. The pilot lines of the non-return valves are connected to the associated second supply lines, so that these valves open automatically when the second working chambers are pressurized.

摘要翻译： 隧道刀护罩具有支撑框架，并且在支撑框架上并排定位的多个刀具。 每个刀具与双作用液压柱塞相关联，用于推动刀的柱塞，以及使支撑框架跟随刀的前进。 提供液压控制装置用于控制公柱的伸缩。 每个压头具有第一和第二工作室，其加压可有效地延伸和缩回该压头。 液压控制装置包括用于向第一工作室供应加压液压流体的各自的第一供应管线，用于向第二工作室供应加压液压流体的相应第二供应管线，以及用于从第一工作室排出液压流体的相应排出管线。 每个排放管路设有流量调节阀和先导式止回阀。 流量调节阀控制柱塞的回缩速度。 止回阀的先导管路连接到相关联的第二供应管线，使得当第二工作室被加压时这些阀门自动打开。

公开(公告)号：US20080009592A1

公开(公告)日：2008-01-10

申请号：US11791693

申请日：2005-11-28

申请人： Klaus Becker-Weimann ,  Walter Hohn ,  Michael Fahrlander

发明人： Klaus Becker-Weimann ,  Walter Hohn ,  Michael Fahrlander

IPC分类号： C08G18/70

CPC分类号： C08G18/4202 ,  C08G18/12 ,  C08G18/7671 ,  C08G2170/20

摘要： Proposed is a process for preparing a reactive polyurethane composition that is characterized in that in a first process stage, from an isocyanate-reactive polymer or mixture of isocyanate-reactive polymers with a fraction of at least 90%, preferably at least 95%, more preferably at least 99% by weight of linear molecules, by reaction with a polyisocyanate having a molecular weight

摘要翻译： 提出了一种制备反应性聚氨酯组合物的方法，其特征在于在第一工艺阶段中，由异氰酸酯反应性聚合物或异氰酸酯反应性聚合物的混合物，其分数至少为90％，优选至少95％ 优选至少99重量％的线性分子，通过与多异氰酸酯的异氰酸酯基相对于聚合物或聚合物混合物的异氰酸酯反应性端基的摩尔量的不足，与分子量<500的多异氰酸酯反应， 制备无单体的热塑性聚氨酯，其在第二工艺阶段与低单体含量的异氰酸酯末端预聚物以热塑性聚氨酯的异氰酸酯反应性端基与异氰酸酯基团的摩尔比与 预聚物为1：1.1至1：5，得到异氰酸酯反应性聚氨酯组合物。

公开(公告)号：US4084386A

公开(公告)日：1978-04-18

申请号：US753514

申请日：1976-12-22

申请人： Walter Hohn

发明人： Walter Hohn

IPC分类号： E02D5/04 ,  E21D9/06 ,  E21D11/10

CPC分类号： E21D11/10 ,  E21D9/0692

摘要： A drive shield of a tunnelling apparatus has elongate drive members supported and guided for longitudinal movement in a manner known per se. The drive members are connected to rear members or tails forming a rear shield and fluid concrete is introduced into a reception space within the rear shield to create a permanent lining for the tunnel. The rear members are shaped or profiled to provide recesses which are closed-off over a certain zone with the aid of covers. Reinforcing bars or the like can be inserted into the recesses to become cast into the concrete lining and means for delimiting the front end of the concrete reception space, such as a ring component, engages on the covers which form a smooth continuous bearing surface therefor.

摘要翻译： 隧道装置的驱动屏蔽具有细长的驱动构件，其以本身已知的方式被支撑和引导以用于纵向移动。 驱动构件连接到形成后挡板的后部构件或尾部，并且流体混凝土被引入到后护罩内的接收空间中以形成用于隧道的永久衬里。 后部构件成形或成型以提供在盖的帮助下在特定区域封闭的凹部。 可以将加强筋等插入到凹部中以铸造到混凝土衬里中，并且限定诸如环形构件的混凝土接收空间的前端的装置接合在盖上，从而形成平滑的连续的支承表面。