Jack safety device
    61.
    发明授权
    Jack safety device 失效
    杰克安全装置

    公开(公告)号:US4635902A

    公开(公告)日:1987-01-13

    申请号:US733503

    申请日:1985-05-13

    申请人: Peter Chou

    发明人: Peter Chou

    IPC分类号: B66F3/30 B66F5/04 B60P1/48

    CPC分类号: B66F5/04 B66F3/30

    摘要: Jack safety device, having a rotation key integral with a pressing spring, a hollow-set key lid, and a spanner fitting the spanner onto a hydraulic tank incorporating a camming bearing surface on the spanner so as to move the key into grooves on the hydraulic jack stem in one position of the spanner and lift the key out of the grooves in another position of the spanner.

    摘要翻译: 千斤顶安全装置,具有与按压弹簧一体的旋转钥匙,中空钥匙盖和扳手将扳手装配到在扳手上结合有凸轮轴承表面的液压箱上,以将钥匙移动到液压 千斤顶杆在扳手的一个位置,并将钥匙从扳手的另一位置从凹槽中提出。

    Hydraulic jack with mechanical safety lock
    62.
    发明授权
    Hydraulic jack with mechanical safety lock 失效
    液压千斤顶带机械安全锁

    公开(公告)号:US4481864A

    公开(公告)日:1984-11-13

    申请号:US400159

    申请日:1982-07-20

    申请人: Armando Peruzzi

    发明人: Armando Peruzzi

    IPC分类号: B66F3/30 F15B15/14 F15B15/26

    摘要: A double-acting hydraulic jack, comprising a hollow piston reciprocable in a surrounding cylinder, includes a tubular shaft extending axially inside and carrying a nut of the circulating-ball type which coacts with a screw coaxially disposed in that shaft. The screw is rigid with the piston whereby an axial displacement of the latter is translated into a rotation of the shaft; a toothed wheel on the shaft, engaged by a spring-loaded detent, acts as a one-way brake enabling such rotation only in one direction and blocking it in the opposite direction unless the detent is withdrawn by a hydraulic servomotor which is pressurized concurrently with the admission of fluid to the cylinder tending to displace the piston in the normally blocked direction. In the case of a double-acting jack, two oppositely effective one-way brakes--possibly including a single toothed wheel on the tubular shaft--normally prevent a displacement in either direction but are respectively deactivated by the admission of fluid into the cylinder at one or the other end thereof.

    摘要翻译: 一种双作用液压千斤顶,包括可在周围气缸中往复运动的中空活塞,包括轴向延伸的管状轴,并且承载与同轴地设置在该轴中的螺杆结合的循环球型螺母。 螺杆与活塞刚性,由此螺杆的轴向位移被转换成轴的旋转; 轴上的齿轮通过弹簧加载的止动件接合,用作单向制动器,其能够在一个方向上进行这种旋转,并且在相反的方向上阻塞它,除非制动器被与液压伺服电机同时加压的液压伺服电机取出 允许流体到缸体倾向于使活塞在正常阻挡的方向上移动。 在双作用千斤顶的情况下,两个相对有效的单向制动器 - 可能在管状轴上可能包括单个齿轮 - 通常防止在任一方向上的位移,但是分别通过一个流体进入气缸中而使其失效 或其另一端。

    Mechanical locking outrigger hydraulic jack for an outrigger assembly
    63.
    发明授权
    Mechanical locking outrigger hydraulic jack for an outrigger assembly 失效
    用于外伸支架组件的机械锁定外伸支架液压千斤顶

    公开(公告)号:US4449734A

    公开(公告)日:1984-05-22

    申请号:US395995

    申请日:1982-07-07

    申请人: William W. Cory

    发明人: William W. Cory

    摘要: A mechanical locking outrigger hydraulic jack for an outrigger assembly for use with cranes and the like includes vertically disposed cylindrical fixed and movable members, the fixed member being secured to a vertically disposed external sleeve. A variable extension chamber is defined by the interiors of the fixed and movable members. A variable retraction chamber is defined exteriorly of the fixed member and interiorly of the movable member. Valve means permit selective raising and lowering of the movable member. A locking nut threadedly engages the threaded exterior of the movable member and is engagable with an external surface of the locking sleeve to mechanically lock the movable member in an extended, lowered position.

    摘要翻译: 用于与起重机等一起使用的外伸支架组件的机械锁定外伸支架液压千斤顶包括垂直设置的圆柱形固定和可移动构件,固定构件固定到竖直布置的外部套筒上。 可变延伸室由固定和可移动构件的内部限定。 可变缩回室被限定在固定构件的外部和可动构件的内部。 阀装置允许可选构件的升高和降低。 锁定螺母螺纹地接合可移动构件的螺纹外部并且可与锁定套筒的外表面接合,以将可动构件机械地锁定在延伸的下降位置。

    Hydraulic jack
    64.
    发明授权
    Hydraulic jack 失效
    液压千斤顶

    公开(公告)号:US4050674A

    公开(公告)日:1977-09-27

    申请号:US754214

    申请日:1976-12-27

    IPC分类号: B66F3/30 B66F3/42 B66F3/24

    CPC分类号: B66F3/42 B66F3/30

    摘要: A hydraulic jack comprising a cylinder, a piston slidable relative to the cylinder, pump means to supply pressurized fluid to the base of the piston, a seal between the piston and the cylinder, means for limiting the stroke of the piston in the cylinder, said means comprising a ring carried by the piston and arranged to expand into a groove in the cylinder wall when the piston reaches the end of its permitted travel, and means for selectively de-activating said stroke limiting means, in order to allow removal of the piston from the cylinder to renew the seal.

    摘要翻译: 一种液压千斤顶,包括一个气缸,一个可相对于气缸滑动的活塞,用于将加压流体供应到活塞底部的泵装置,活塞和气缸之间的密封件,用于限制活塞在气缸中的行程的装置, 装置,包括由活塞承载的环,并且当活塞到达其允许的行程的端部时被布置成扩展到气缸壁中的凹槽中,以及用于选择性地去激活所述行程限制装置的装置,以便允许移除活塞 从气瓶更新密封。

    Double-acting rotary hydraulic jack
    65.
    发明授权
    Double-acting rotary hydraulic jack 失效
    双作用旋转液压千斤顶

    公开(公告)号:US3986437A

    公开(公告)日:1976-10-19

    申请号:US461233

    申请日:1974-04-15

    申请人: Jean Lioux

    发明人: Jean Lioux

    摘要: A double-acting rotary hydraulic jack having two jack compartments, comprising a rotary hydraulic joint for the supply of hydraulic liquid to and the evacuation of hydraulic liquid from the compartments. The two compartments of the jack each communicate with at least one axial boring in a rotary part of the jack which is not axially movable. In this boring a movable piston bears against the head of a guide rod for a spring which itself bears against the rotary part of the jack. The ends of the rods, externally of the borings, are secured to a member coaxial with the jack, for example a sleeve, whose axial position is monitored by a displacement detector, so as to give an indication of the working pressure in the active jack compartment.

    摘要翻译: 具有两个千斤顶隔间的双作用旋转液压千斤顶,包括用于供应液压液体的旋转液压接头以及从隔室排出液压液体。 千斤顶的两个隔间与至少一个不能轴向移动的千斤顶的旋转部分的轴向钻孔连通。 在这种镗孔中,可移动的活塞靠在导向杆的头部上,该导向杆本身承受千斤顶的旋转部分。 杆的端部固定在与千斤顶同轴的构件上,例如套筒,其轴向位置由位移检测器监控,以便给出有源千斤顶中工作压力的指示 隔间

    Resilient supporting column of adjustable length
    66.
    发明授权
    Resilient supporting column of adjustable length 失效
    弹性支撑柱长度可调

    公开(公告)号:US3913901A

    公开(公告)日:1975-10-21

    申请号:US49670474

    申请日:1974-08-12

    申请人: STABILUS GMBH

    发明人: MOLDERS WERNER

    CPC分类号: A47C3/30 B66F3/30

    摘要: A resilient leg for a stool includes a cylinder normally attached to the seat of the stool and a piston rod attached to a piston in the cylinder and normally attached to the stool base. The two compartments in the cylinder axially separated by the piston are filled with compressed gas and may be connected by a manually operated valve. They are also connected automatically by recesses in the axial inner wall of the cylinder when the piston approaches one of the radial end walls of the cylinder. A helical spring then abuttingly engages the end wall and the piston rod to impede further movement of the piston toward the end wall with a force greater than that exerted by the gas in the absence of the recesses.

    摘要翻译: 用于粪便的弹性腿包括通常连接到粪便座上的气缸和连接到气缸中的活塞并且通常附接到粪便基座的活塞杆。 由活塞轴向分离的气缸中的两个室被填充有压缩气体,并且可以通过手动操作的阀连接。 当活塞接近气缸的径向端壁之一时,它们也通过缸体的轴向内壁中的凹部自动连接。 然后螺旋弹簧邻接地接合端壁和活塞杆,以阻止活塞朝向端壁的进一步移动,其力大于在没有凹部的情况下由气体施加的力。

    Safety catch for hydraulic jacks for automobiles
    67.
    发明授权
    Safety catch for hydraulic jacks for automobiles 失效
    汽车液压。。。。。。。。。。。

    公开(公告)号:US3759488A

    公开(公告)日:1973-09-18

    申请号:US3759488D

    申请日:1971-12-16

    申请人: LUKAS P

    发明人: LUKAS P

    CPC分类号: B66F17/00 B66F3/30 B66F5/04

    摘要: A rolling hydraulic auto jack has a shaft which telescopes to raise and lower an auto. The invention provides a metal channel or block which fits around the shaft to preclude a telescoping retraction thereof. This channel or block is a safety stop which keeps the jack from inadvertently lowering the auto, even if the hydraulic system fails.

    摘要翻译: 滚动液压自动千斤顶具有望远镜以升高和降低汽车的轴。 本发明提供一种金属通道或块,该金属通道或块围绕轴安装以防止其伸缩。 该通道或块是一个安全停止,即使液压系统发生故障,也能保持千斤顶无意中降低自动。