Abstract:
A mine door installation has a frame installed in a mine passageway. At least one door leaf is mounted on the frame for swinging movement between open and closed positions. Movement of the door leaf is powered by a pneumatic actuator. A pneumatically-powered control system may be provided to control the door installation. The pneumatic control system may comprise a calibrated vent to shorten the delay in the response of the door leaf to direction from the control system to stop moving. The pneumatic control system may also comprise a limit valve to prevent the door installation from opening when a second door installation is open, thereby preventing both door installations in an air lock from being open at the same time.
Abstract:
A damper includes a cylindrical housing; a rotor rotationally housed in the cylindrical housing; a biasing member for applying a biasing force to the rotor; viscous fluid filled in the cylindrical housing; and a spare winding setting device for setting the biasing force of the biasing member. When the rotor rotates, the rotation is damped by a shear resistance of the viscous fluid filled in the cylindrical housing. The damper may include an open position lock mechanism having a first engaging projection disposed on an inner circumferential surface of the cylindrical housing and a second engaging projection disposed on an outer circumferential surface of the rotor. The first and second engaging projections can engage or move over with each other.
Abstract:
A rotary damper includes a cylindrical member having walls on an inner peripheral surface of a cylindrical chamber along a radial line, and a rotor member having vanes moving along the inner peripheral surface of the cylindrical chamber. A resistance force of a viscous fluid filled in the cylindrical chamber is applied to the vanes when the cylindrical member rotates relative to the rotor member. The rotor member is formed of a thermoplastic resin containing inorganic filler or fiber. Thus, the rotor member having high strength can be obtained.
Abstract:
The invention relates to a damping device for movable furniture parts, for example for doors or drawers, comprising a piston or plunger which is slidably guided in a hollow body, e.g. a cylinder, with said piston or plunger being impinged upon by spring force into its pushed-out position. According to the invention, the hollow body comprises at least one section of a spiral-shaped stay of the internal screw thread, and/or the piston or plunger comprises at least one section of a spiral-shaped stay of the external screw thread. The stays of the screw threads are glidingly supported one on top of the other, or cams or journals of the hollow body or of the piston or plunger are supported on a screw-thread section of the other component. The pitch of the stays of the screw threads is greater than the pitch at which self-locking occurs.
Abstract:
In an item of furniture having a movable furniture part, such as a drawer, door or folding part, a damping apparatus damps movement of the movable furniture part. The damping apparatus is constructed as a negative-pressure damping apparatus or combined pressurized and negative-pressure damping apparatus. It has a piston (3) and a resiliently deformable piston part (6) in the piston rod (4). This resiliently deformable piston part (6) is pressed against the cylinder wall during the damping procedure.
Abstract:
A sliding resistance member (3) is interposed between a glove box (B) and a rod type air damper (21). It is assumed that when a glove box lid (L) corresponding to a open-close member starts opening, the rod type air damper (21) rotates while running idle in conjunction therewith, in a relation in which the rotary type oil damper (3) is positively interposed between the glove box (B) corresponding to the mounting shaft and the rod type air damper (21). However, since a braking force of the sliding resistance member (3) is applied to the side of the open-close member in a rotating section of the rod type air damper (21), an sufficient damper effect can be obtained even when the open-close member starts opening.
Abstract:
In an arrangement for damping the pivot movement of a furniture component which is supported by a pivot joint on a stationary furniture part and which includes a damping element for slowing the movement of the furniture component near one of its end positions, the damping element includes a cylinder and piston unit forming part of a hinge, which includes a hinge housing in which a piston operating member is slidably supported and operatively connected to the piston, and a hinge lever extends between the movable component and the stationary furniture part in such a way that it engages the piston operating member in the hinge housing when the movable component approaches one of its end positions so as to slow down the movable component.
Abstract:
In an original pressing plate hinge including a fixing member, an original pressing plate supporting member pivotably installed via a hinge pin to the fixing member, a slider slidably housed in the supporting member, a cam member fixed between the slider and the free end of the supporting member in contact with the slider, and a coil spring provided resiliently between the slider and the free end of the supporting member, the cam member is omitted to prevent an original or document set on the platen glass for copying or printing from being stained with or spoiled by a lubricant when the original touches the cam member to which the lubricant sticks, and instead a pressure receiving pin is used and a cam slider is used in place of the slider. To prevent a heavy original pressing plate from abruptly falling, a fluid damping member is housed in the coil spring and disposed between the cam slider and the top plate or free end of the supporting member.
Abstract:
A damping mechanism for an opening and closing member that opens and closes an opening while changing a center of rotation has an arm with damped rotational speed to support a shaft part of the opening and closing member. A position of the shaft part with respect to the arm is changed along with the opening and closing operation of the opening and closing member by a guide member. The arm is urged toward an opening direction of the opening and closing member by a forcing member, and the opening and closing member is maintained in a closed state against the force of the forcing member by a locking member.
Abstract:
A sliding resistance member (3) is interposed between a glove box (B) and a rod type air damper (21). It is assumed that when a glove box lid (L) corresponding to a open-close member starts opening, the rod type air damper (21) rotates while running idle in conjunction therewith, in a relation in which the rotary type oil damper (3) is positively interposed between the glove box (B) corresponding to the mounting shaft and the rod type air damper (21). However, since a braking force of the sliding resistance member (3) is applied to the side of the open-close member in a rotating section of the rod type air damper (21), an sufficient damper effect can be obtained even when the open-close member starts opening.