Abstract: A storage shelf reduces vibration while maintaining load-carrying capacity and includes placement units on which a FOUP is placed, and a frame unit that supports the placement units. The placement units include frames that are arranged on the frame unit with first elastic bodies interposed therebetween, and a shelf plate that is arranged on the frames with second elastic bodies interposed therebetween and is configured to place thereon the FOUP.

Abstract: A wrench and nut combination, including: a wrench lug including: a wrench lug feature that substantially mates with a nut feature of a nut of a shock absorber during a first rotation of said nut, relative to external body threads on a body of the shock absorber, in a first direction, wherein the wrench lug feature and the nut feature release during a second rotation of said nut, relative to the external body threads, in a second direction, wherein at least one of the first rotation and the second rotation causes an adjustment to a compressive coil spring pre-load of a set of coil springs disposed in the shock absorber.

Abstract: A spring structure includes a clockwise spring and a counterclockwise spring that are coaxially arranged under a state in which a spring seat is interposed between a lower end portion of the clockwise spring and an upper end portion of the counterclockwise spring. An upper end portion of the clockwise spring is supported on an upper spring seat portion, and a lower end portion of the counterclockwise spring is supported on a lower spring seat portion.

Abstract: A linkage comprises a first rounded end providing a complimentary profile configured to mate with an inner radius of a loop element in a first drawbar spring, and a second rounded end opposite the first rounded end. The second rounded end provides a complimentary profile configured to mate with an inner radius of a loop element in a second drawbar spring. The linkage is configured to be positioned between the loop element in the first drawbar spring and the loop element in the second drawbar spring such that the first rounded end is mated with the loop element in the first drawbar spring and the second rounded end is mated with the loop element in the second drawbar spring to mechanically couple the first drawbar spring in series with the second drawbar spring.

Abstract: The present invention comprises a suspension spring and snubber arrangement for reducing transmitted noise from a reciprocating compressor at ?-octave frequency band of 500 Hz and preventing the occurrence of resonance frequency during the reciprocating compressor operation, the arrangement comprising: the suspension spring having a plurality of coils and two opposing open ends; at least one snubber for maintaining the integrity and shape of the suspension spring and for preventing displacement of the suspension spring from their intended position; wherein at least one open end of the suspension spring is loosely fitted over the at least one snubber; and further wherein an internal diameter of the suspension spring is larger than a outer diameter of the snubber so that a gap is defined between the suspension spring and the snubber for minimizing physical contact between the suspension spring and the snubber.

Abstract: A spring system for relatively displacing elements attached to end mounts of the rod assembly comprises a housing having a rod member movable between extended and retracted positions relative thereto, and a first compression spring in the housing surrounded by a second compression spring for biasing the rod member to one of an extended or retracted position relative to the housing. The two springs are oppositely wound whereby, from a compressed condition, the spring rod exerts an expansion force which increases at a linear rate. The spring system includes a valve arrangement to control the rate at which the spring rod moves from a retracted position to an extended position.

Abstract: A lift spring assembly has a compression spring rod with a housing having a longitudinal axis and axially opposite ends, and having a rod member coaxial with the axis and having an inner end in the housing and an outer end axially outwardly of one of the opposite ends. A guide member is provided on the inner end of the rod member for supporting the rod member during movement of the rod member. A first stage spring assembly extends between one of the opposite ends of the housing and the guide member. A second stage spring assembly extends between the other of the opposite ends of the housing and the guide member. A mounting member extending from one of the opposite ends of the housing for mounting the spring rod assembly to a hood assembly. A locking member is pivotally connected to the mounting member and pivots into locking engagement with one of the ends of the housing.

Abstract: A spare tire dynamic damper for a vehicle comprises a mounting frame, at least one support plate, and a moveable spare tire attachment plate spaced between the at least one support plate and the mounting frame, wherein the spare tire attachment plate is configured to move in the space between the mounting frame and the at least one support plate. In this embodiment, the spare tire dynamic damper comprises a pair of coil springs, wherein each coil spring is extended from opposite faces of the spare tire attachment plate, and one or both of the coil springs is configured to oscillate upon the movement of the spare tire attachment plate.

Abstract: A force control strut including a housing having first and second ends and an internal chamber, a rod member having an inner end reciprocally movable inside the housing and along the internal chamber, a guide member forming a bushing allowing reciprocation of the rod member in the housing, a bottom plug fixed in the internal chamber, a guide piston secured to an inner end of the rod and slidable along an inner surface of the internal chamber, a first coil spring positioned between the guide piston and one end of the housing to bias the rod member in a given direction in the housing, a first external connector fixed to the rod member, a second connector fixed to the bottom plug, and a damper that includes a plunger reciprocally mounted in a force controlling passageway inside the rod member and movable in a passageway of the rod member.

Abstract: A compression spring rod for relatively displacing elements attached to end mounts of the rod assembly comprises a housing having a rod member moveable between extended and retracted positions relative thereto, and a first compression spring in the housing surrounded by a second compression spring for biasing the rod member to one of an extended or retracted position relative to the housing. The two springs are oppositely wound, of different length, of different outside diameter, and of different wire diameter whereby, from a compressed condition, the spring rod exerts an expansion force which increases at a linear rate. Two sets of the springs can be arranged for biasing the rod member to a central position relative to the housing.

Abstract: A long travel, varying spring rate combination spring includes two differing rate springs connected end-to-end in such a way that the lower rate spring is compressed until positive engagement of a plunger with an intermediate flange member occurs with the higher rate spring thereafter compressed. Each spring may be assembled separately and connected together with a coupling to create a combination spring, allowing various springs to be combined to meet the requirements of a particular application.

Abstract: A lift spring assembly has a compression spring rod with a housing having a longitudinal axis and axially opposite ends, and having a rod member coaxial with the axis and having an inner end in the housing and an outer end axially outwardly of one of the opposite ends. A guide member is provided on the inner end of the rod member for supporting the rod member during movement of the rod member. A first stage spring assembly extends between one of the opposite ends of the housing and the guide member. A second stage spring assembly extends between the other of the opposite ends of the housing and the guide member. A mounting member extending from one of the opposite ends of the housing for mounting the spring rod assembly to a hood assembly. A locking member is pivotally connected to the mounting member and pivots into locking engagement with one of the ends of the housing.

Abstract: A pretensioned spring track tensioning system provides a two stage loading of a tension roller on the interior of a vehicle drive track. The two stage loading first loads the track under a lower tension load for normal operation, but when the track is highly loaded, such as when digging, or when debris is forced between the track member and its drive sprocket or guide rollers, the compression of the lighter spring will be stopped mechanically and a second heavier compression spring will provide the tension loading. The additional spring tension under unusual conditions prevents detracking of the track and buckling of the track. A lighter tension load during normal operations reduces the loads on bearings, particularly in relation to a drive motor. The tensioning system has particular adaptability to “high” drive type tracks which have a drive sprocket elevated above the tension roller.

Abstract: A self-centering mechanical strut has first and second housing members. The second housing member telescopically receives the first housing member. Spring assemblies are mounted within each of the housing members. The spring assembly in the first tube is compressed when the first housing is pushed into the second housing. The spring assembly in the second tube is compressed when the first housing is pulled out of the second housing. Each housing is spring-biased to return to its respective neutral position.

Abstract: A shock absorber comprising: a cylinder body has a piston rod movably received therein, a shock absorbing spring is mounted to the cylinder body and biased between the piston rod and the cylinder body, a buffering spring is mounted to an end of the piston rod in the cylinder body and biased between the inner edge of the cylinder body and the end of the piston rod.

Abstract: An air damper suitably used in the glove box of an automobile comprises a cylinder having a first open end and a second end, a guide cap covering the first open end, and a piston moveable in the cylinder. A compression coil spring is inserted into the cylinder between the piston and the guide cap. The coil spring forces the piston toward the second end of the cylinder in the free state. The piston has a hook piece, which is threaded with a string. At least one end of the string is taken out of the cylinder via the guide cap, and connected to the glove box. The guide cap has a stopper means projecting inside the coil spring and toward the piston. When the glove box is opened and the string is pulled out of the cylinder, the piston moves toward the guide cap. The piston then strikes the stopper means of the guide cap before the coil spring is fully compressed.

Abstract: A pressure cylinder for a hydraulic actuation device in motor vehicles includes a housing (1) with an internal cylinder (2,3). A piston (6) is displaceable in the internal cylinder for forming a pressure space (12) for a hydraulic fluid. The piston includes a hemispherical socket (10) in an indentation (9). A spring (18) is arranged in the pressure space (12), and a tappet (7) is connected by a transmission part with a hemispherical cap (8). The tappet (7) is in a frictional and swivelable engagement in the socket (10) in an indentation (9) by the force of the spring (18). The piston is a deep-drawn, cup-shaped part and includes a filling piece (13) in the interior of the piston (6). An annular space (15) is disposed at a piston surface (14) facing toward the pressure space (12). The annular space (15) is for receiving the spring (18) in a compressed state when the piston (6) is in a top dead center position.

Abstract: A device for compensating the weight of a robot arm of a robot with a spring cylinder and having at least one helical spring is characterized in that there is at least one mechanism for the insertion and removal of at least one further, replaceable helical spring and preferably a pretension of at least the replaceable helical spring is adjustable. The device according to the invention makes it possible to modify the spring constant of the spring cylinder in order to individually adjust the compensating force desired for compensating the weight of the robot.

Abstract: An air damper of the present invention is provided with a cylinder whose one end is closed and other end is open; a piston which is movable along an axial direction of the cylinder within the cylinder in a state where an end of a string is connected to the piston; a recess groove formed in a peripheral surface of the piston; an O-ring seal between the cylinder and the piston and movably fitted to the recess groove; a coil spring butted against one of a pair of flanges defining the recess groove of the piston for biasing the piston toward the one end of the cylinder; a hook provided on one of the pair of flanges, the end of the string being attached to the hook; and opposed notches formed by notching portions of the pair of flanges of the piston corresponding to opposite sides of the hook.

Abstract: A twist-correcting device for a wire rope isolator, the retaining bars of which may become twisted in the process of installing the conventional wire rope isolator between a platform and an apparatus, which makes it difficult to assemble the wire rope isolator and prevents the isolator from performing fully. The twist-correcting device includes a pair of clamps for correcting the twisting of the retaining bars of the isolator by holding the retaining bars closely parallel to each other at both end portions of the wire rope isolator. The twist-correcting device is capable of simplifying the installation of a wire rope isolator between a platform and an apparatus and enabling the wire rope isolator to perform at its best.

Abstract: The conical disc spring column has a central shaft with retention shields at both ends thereof and with aligned superposed conical discs positioned about the shaft, the shaft being formed of two coaxial telescopic sections having a sliding connection therebetween for controlled retraction and extension of the shaft.

Abstract: A spring guide retainer is provided for preventing buckling of a spring during spring compression as an upper die moves toward a lower die in a stamping operation. The spring guide retainer comprises a spring guide housing to hold the spring location, a spring guide holder fixed to the upper die to promote spring alignment, and a spring guide pin to maintain alignment of the spring. A screw associated with the spring guide pin is receivable through a pocket of the spring guide housing to secure the spring guide pin and the spring guide housing to the pad.

Abstract: A mechanism for absorbing impacts encountered by a mower deck coupled with a vehicle, including an arm operatively coupled with the vehicle, a longitudinally extending first tube member coupled with the arm and defining a generally linear axis which extends rearwardly and inwardly toward the vehicle, a second tube member operatively coupled with the mower deck, the first tube being slideably received within the second tube for allowing the second tube to shift linearly along the axis as the mower deck encounters frontal impact loads, a compression spring positioned within the tubes for biasing the second tube and mower deck forwardly with respect to the first tube, and the second tube member is allowed to pivot with respect to the first tube member for allowing the mower deck to pivot from side to side to follow undulating ground contours.

Abstract: The vertical stack of trays in a movable tray sorter for sheets of paper exiting a copies is moved in a manner to enlarge the spacing between consecutive pairs of the trays to accept consecutive sheets of paper by moving the trays along a pair of helical coils, each of which has a turn of relatively coarse pitch. The turns of relatively coarse pitch are located at the copier paper chute and causes an increased separation of adjacent trays only at that position as the coils are turned.

Abstract: A suspension system for isolating a platform from external vibrations includes spring assemblies suspending the platform. In each spring assembly an elongated outer coil spring is suspended at an upper end thereof from a support structure. A tube is disposed loosely within the outer spring and is attached to a lower end of the spring so as to extend upwardly. An elongated inner coil spring is disposed loosely within the tube and is suspended from an upper point of the tube. The inner spring has a lower end attached to the platform. For friction dampening, o-rings are fitted on the inner spring in sliding contact with the tube.

Abstract: A handlebar including a shank, a ring formed integral in the shank, a number of teeth formed in the ring, a rod slidably engaged in the ring, a number of teeth formed on the rod for engagement with the teeth of the ring so as to prevent the rod from rotating relative to the shank, a disc fixed to one end of the rod and a tube coupled to the other end of the rod, and a spring biased between the ring and the disc for cushioning shocks transmitted to the handlebar.

Abstract: The invention is a hitch device for interconnecting two mobile apparatus, such as a hospital gurney and an IV stand. The hitch device comprises a body having first and second ends, each end having a coupling for attachment to a mobile apparatus, and a monoplanarly flexible intermediate portion disposed between the first and second ends. The intermediate portion includes a chain, which is oriented so that only lateral flexing is permitted when the device is in use. The intermediate portion also includes a resilient tube or spring for biasing the intermediate portion to an axial position. A stop located on the first end prevents upward rotation of the intermediate portion beyond a horizontal position when the device is in use.

Abstract: A shock absorber for use in toys comprising a rod for supporting a wheel, a retainer slidably along the rod, and a spring interposed between the lower section of the rod and the retainer which forces the retainer upwardly. These members can be pre-assembled as unit kit. When the shock absorber is mounted on a chassis member, the retainer is depressed downwardly against the biasing force of the spring and the rod is inserted into a bore formed on a chassis member through a opening side groove thereon. After that, the retainer is held in a recess on the bottom of the chassis member so that the rod is reciprocable along the retainer and the bore of the chassis member to absorb the vibration or shock from the wheel.

Abstract: A hood tilt control mechanism includes a hood support brakcet having one hinge leaf attached to the chassis including a longitudinally extending slot for slidably receiving one end of a telescoping hood tilt assist mechanism and a second hinge leaf attached to the hood and providing a pivotal mount for the other end of the assist mechanism. The assist mechanism telescopes or extends respectively against the bias of opening or closing springs disposed adjacently on the assist mechanism so that when the hood is closed, the closing spring exerts a counterbalancing force on the hood to assist its opening. As the hood opens the closing spring force goes to zero and, as the hood moves to the open position, the opening spring is engaged by the mechanism to dampen the motion of the hood, ultimately stops the hood by interference of the spring coils, and counterbalances the hood weight in the open position to assist closing.

Abstract: An anti-vibration damping device for the main spring of a piston air gun comprises an insert body extending longitudinally within the spring coils and a locating portion at one end on which an end of the spring seats, the insert body including resilient limb formations which are radially expanded to engage the interior of some of the spring coils.

Abstract: A sub assembly for connecting a power swivel to a drill string. The assembly includes a telescopic sub having a preloaded spring. The telescopic sub has three discrete positions enabling it to travel in either direction from a normal position. This capability prevents thread damage for both when connecting and disconnecting a drill pipe to the drill string.

Abstract: The vertical stack of trays in a movable tray sorter for sheets of paper exiting a .?.copies.!. .Iadd.copier .Iaddend.is moved in a manner to enlarge the spacing between consecutive pairs of the trays to accept consecutive sheets of paper by moving the trays along a pair of helical coils, each of which has a turn of relatively coarse pitch. The turns of relatively coarse pitch are located at the copier paper chute and causes an increased separation of adjacent trays only at that position as the coils are turned. .Iadd.The coils support the trays approximately midway between the ends of the trays in a sheet feeding direction and the sorter has vertically extended guides at opposite sides of the trays adjacent one end in which side portions of said trays slide to maintain the trays substantially parallel. .Iaddend.