Abstract: A vehicle seat suspension system is provided which includes, in a seat support comprising an upper housing and a lower housing and a scissors linkage support apparatus, a spring fixed to the upper housing and a cable attached to the spring and wrapping around a pulley attached to the upper housing and downwardly to an arcuate pulley attached at the scissors linkage midway pivot and an actuator knob which allows a seat occupant to tighten or loosen the cable and raise or lower the seat to provide a vehicle seat suspension system.

Abstract: A seat for vehicles, especially commercial vehicles, of which the cushion support is mounted on a swinging frame with two identically configured pairs of levers which intersect and pivot with each other, has on each side of the swinging frame at least one fastening point for a seat belt system. Pivot connections combined with a guide for each one running longitudinally along the seat connect the rear terminal segments of the rocking levers with the lower part and the upper part of the swinging frame. The rocking levers extending from the upper part of the swinging frame obliquely forward and downward are embodied with a diminished carrying capacity as compared with the other rocking levers.

Abstract: A vibration dampening suspension device for isolating a truck cab from the force vibrations of a vehicle frame, which includes an impact plate mounted to the truck cab, and a support plate mounted to the vehicle suspension. The device further includes a link member pivotally interconnected at one end with the support plate at a support pivot, and a lever member with a first end pivotally interconnected with the impact plate at a main pivot. The link member is pivotally interconnected with the lever member for rotation of the lever member with respect to the main pivot during compression of the shock absorber when the supporting body, suspended body and device are in a dynamic condition. A hydraulic shock absorber is provided with a first end pivotally interconnected with the lever member second end at a shock pivot and the second end pivotally interconnected with the impact plate at a pivot spaced from the main pivot.

Abstract: The housing of an air valve, the valve controlling the height of a vehicle seat supported on a suspension having an air spring, is pivotally connected to one of the frames of the suspension supporting the seat. A manual control lever connected to the housing is operative to change the angle of inclination of the housing for selecting a desired height of the seat. A control arm of the valve is connected by a linkage to the other frame of the suspension. These connections to the air valve control the valve for selecting a desired height and for automatically restoring the height for different weights on the seat.

Abstract: A suspension device for automotive seat which is provided with a hydraulic damper and a compression coil spring wound therearound, such that the coil spring is adjusted in elastic repercussion force by way of worm gear and worm wheel so as to permit a fine adjustment of the repercussion force of the coil spring. A casing may be provided for housing the worm gear and worm wheel, and an indicator is formed on the casing. Below the casing, a scale plate having a desired plural graduation lines or marks is provided, to thereby precisely set a desired reprecussion force of the spring.

Abstract: A vibration isolation arrangement, for example for supporting a stretcher in an ambulance, comprises a lever (16) which extends between a base structure (6) and a support frame (4). The lever (16) can pivot about a fulcrum (30) and is acted upon by a spring (28). The fulcrum (30) is displaceable by an actuator (32) along a guide (34). Such displacement not only varies the stress of the spring (28), but also alters the moment arm (h) between the spring (28) and the fulcrum (30). When raising the support frame (4) to a predetermined level, the mechanism automatically adapts to the load on the support frame (4) to provide a constant natural frequency for the system, regardless of the weight of the patent being carried.

Abstract: A suspension device for seat which includes a torsion bar interposed between an upper movable frame and a lower base frame, the torsion bar being adapted to bias the upper movable frame upwardly, and a spring provided on a shock absorber which is extended between the upper movable and lower base frames. The repercussive force of the suspension device is increased by the torsion bar and spring, against a downward load applied on the seat.

Abstract: An air suspension device for a vehicle seat which is capable of automatic adjustment of the height of the seat at a given neutral position. In the device, an air spring is adjusted in flow of air thereinto or therefrom via a directional control valve which is actuated responsive to the vertical movements of link members, so as to adjust the height of the seat. A play is provided in the interlocking relation between the control valve and link members to avoid unnecessary actuation of the valve. Further, a manual control valve is disposed between an air source and the air spring, with a check or shuttle valve provided therein, thereby forming a direct air exhaust circuit, whereby operating the manual valve effects a rapid exhaust of air from the air spring, not via the directional control valve.

Abstract: A system for mounting a device on board ship which experiences normal vibrations of a predetermined frequency and which may be subjected to high intensity shock forces including a plurality of preloaded liquid springs operable in tension and compression and oriented in a truss configuration between the deck of the ship and the device, the casings of the liquid springs having a natural frequency in excess of the normal shipboard vibrational frequencies and by virtue of being preloaded providing rigid linkages for transmitting normal shipboard vibrational frequencies to the device, the preloading being of such a magnitude to permit the liquid springs to yield in either tension or compression when the ship is subjected to high intensity shock forces such as weapons effect pulses, and the liquid springs resetting the device to its normal position relative to the ship after termination of the high intensity shock forces.

Abstract: A mechanical seat suspension inside a housing includes parallel scissor arms and a support arm with a cam connected to suspension springs. The support arm, which carries the substantial majority of the seat load, has a height adjustment assembly and a cam with two arcuate surfaces that define an imaginary pivot point. The use of the cam with the imaginary pivot point permits a more compact structure. A shock absorber attached to the outside of the scissor arms dampens the stroke of the suspension springs connected to the cam. The ratio of the shock stroke travel to the vertical movement of the seat remains generally linear and constant, thus producing a more comfortable rids. Also included is a height adjustment mechanism on the support arm that interlocks with the cam by a pivoting pawl and biasing spring. The height of the seat is adjusted by the relative movement of the top portion of the housing to the lower portion. No external levers, triggers, or other structures are necessary for seat adjustment.

Abstract: A system includes a single snubber and a rigid strut, to support two spaced locations on equipment to a structural support, in a manner that allows each location of the equipment to slowly move independently of the other, as to accommodate changing equipment temperature, while resisting rapid movement of either, as can occur in an earthquake. A linking element is pivotally mounted on the support, and one end of the snubber and one end of the strut are pivotally mounted at spaced locations on the linking element. The opposite ends of the snubber and strut are pivotally mounted at spaced locations on the equipment.

Abstract: A compact seat suspension for an underground mining machine is disclosed in which a vertical suspension is operably connected between a fixed bracket and a sliding bracket for supporting a seat and for reducing and dampening vibration and shock transmitted from the mining machine to the seat. The fixed bracket is attached to a side wall of the mining machine and includes one or more vertical guide members. The sliding bracket is movably mounted on the vertical guide members for relative vertical movement with respect to the fixed bracket. The sliding bracket is attached to the back portion of a seat provided within the mining machine. The entire compact assembly is adapted to be positioned entirely behind rather than beneath the seat, making it possible to utilize the suspension in areas of reduced height.

Abstract: An apparatus for supporting an object on a base for isolating the object from movement of the base, typically an art object, instrument, case, or housing for projection during seismic activity. The apparatus includes a base plate for attachment to the base, with a frame positioned on the base plate and adapted for omni-directional movement over the base plate. A lever is pivotally mounted on the frame and is connected to a spring, typically by a cable. The lever is also connected to the base plate, typically by another cable, with movement of the base plate moving the lever and extending the spring, after which the spring retracts, restoring the apparatus to the rest position.

Abstract: A shock mount for mounting an electrical apparatus to a chassis includes a resilient buffer mounted to the apparatus and to the end of an L-shaped arm. The L-shaped arm is joined to and integral with the chassis and is arranged to support bending and torsional loads to absorb mechanical shock.

Abstract: An adjustable slide in a seat suspension is connected through a plate to a link of a parallel linkage, and one end of a shock absorber is connected to the slide. The other end of the shock absorber is connected either to a support for a seat guided by the parallel linkage of a suspension or to a base to which the parallel linkage is connected. Means for changing the distance of the slide over the plate from an adjacent pivot adjusts stiffness or quality of ride.

Abstract: A seat suspension for resiliently attaching a seat assembly to a support frame on a vehicle so as to cushion the ride for the seat occupant comprises: main biasing springs operatively connected between the seat assembly and support frame to initially absorb energy and limit descent as the seat assembly is forced downward; auxiliary biasing springs, including a "hard" spring and a "soft" spring, to subsequently absorb energy and further limit descent after the main springs have been compressed a predetermined amount; and a shock absorber connected between the seat assembly and support frame to dampen vertical motion. A preloading apparatus is provided for adjusting or preloading the main biasing springs to take into account the weight of the seat occupant. A height adjusting apparatus is provided to adjust the height of the seat assembly and associated biasing springs relative to the support frame.

Abstract: A seat suspension featuring a weight-responsive, height-adjusting mechanism which is advantageously employed in a seat intended to be installed in a smaller sized vehicle is disclosed. The seat suspension includes a pair of shock absorbers arranged at the lower portion of X-shaped links with its height being substantially the same as that of the lower portion of said links.

Abstract: A body-weight adjusting device for a seat suspension is provided including an X-shaped link mechanism constituting the seat suspension, a combination of pinions and rack gears and a pair of tension springs. Vertical movement of an operation lever causes rotation of the pinion gears and simultaneous rotation of the intermeshing rack gears, to thereby increase or decrease the tension of the tension springs. In response to such tension variation in the tension springs, the X-shaped link mechanism is raised or lowered corresponding so as to permit a selective adjustment of the seat suspension to accommodate the weight of a seated occupant.

Abstract: A body-weight adjusting device for a seat suspension is provided including a combination of bell cranks, tension springs and a connecting rod. Vertical movement of an operation lever results in an increase or decrease in the tension of the springs (depending upon the starting position of the lever) in response to which the seat suspension mechanism is raised or lowered correspondingly so as to permit a selective adjustment of the seat suspension in accordance with the weight of a seated occupant.

Abstract: Adjustable damping is provided for the seat bottom cushion of a vehicle seat of the type having a seat frame which is mounted at a stationary position on the vehicle floor. A resilient seat cushion is mounted upon the seat frame and is resiliently compressed relative to the frame by the static occupant load when the occupant sits upon the seat bottom cushion. Occupant movement causes the further resilient movement of the seat bottom cushion above and below the static vertical position. A scissors mechanism acts between the vehicle body and a plate attached to or embedded in the seat bottom cushion to translate the vertical movement of the seat bottom cushion into a horizontal movement of a portion of the scissors mechanism. An adjustable damping device such as a dash pot is operatively connected to the horizontally movable portion of the scissors mechanism whereby the vertical movement of the seat bottom above and below the static vertical position is adjustably damped to provide a desired occupant ride.

Abstract: Low profile resilient suspension utilizes a pair of horizontally positioned, adjustably tensioned springs to support the weight of a seat occupant. The springs are mounted to one of the movable or fixed seat frame members so as to be completely independent of the linkages, such as scissors links, which guide the movable seat frame member for generally vertical parallel movement relative to the base frame member and floor. The tension of the springs can be adjusted by weight adjustment control members fixed to one of their ends to accommodate occupants of differing weights. The adjustment can be made when the seat is either occupied or unoccupied. The weight adjustment control members remain fixed relative to the seat frame as the suspension oscillates vertically. The opposite ends of the springs are mounted to the ends of the short arms on a pair of connected bellcrank levers which are pivoted to one of the seat frame members.

Abstract: The support comprises means for elastic longitudinal positioning of the upper chassis carrying the seat, constituted by a first rigid element (51) which is fixed in the horizontal direction with a lower chassis for fixing on the vehicle and which is situated between two further rigid elements (42A, 42B) fixed in the horizontal direction with an upper chassis (2) carrying the seat, while two opposed elastic elements (52, 53) are interposed respectively between the said first rigid element and the two other rigid elements.

Abstract: A suspension seat has a seat part, which includes a seat support frame and a back rest frame pivoted about a horizontal axis to the seat support frame, the seat part being mounted through a spring suspension on a base part, and a vibration damper of the piston and cylinder type pivotally connected between the seat and base parts. The lower end of the vibration damper is pivoted to the base part.The upper end of the vibration damper is slidably connected to the back rest frame and pivotally connected to the upper closed end of a yoke whose lower ends are pivoted to the seat part as closely as convenient to the pivotal connection between the vibration damper and the base part to allow tilting of the back rest frame without significantly varying the distance between the ends of the vibration damper.

Abstract: A vehicle seat suspension, of the type comprising a seat frame supported on a base frame by two spaced pairs of scissor action linkage arms, has the ends of the linkage arms connected to one of the frames wholly by pivotal connections having freedom for displacement longitudinally of the suspension and a resilient coupling connecting the one frame to one of the linkage arms to damp the transmission of vibrations between the frames in the longitudinal direction.

Abstract: A low profile seat for vehicles features structural geometry which enables the use of an air spring to control seat height and rate in vehicles whose interior dimensions does not provide for the placement of a more conventional air spring vehicle seat. A fore-and-aft vibration absorbing system may be selectively engaged or disengaged to provide for further driver comfort.

Abstract: A boom assembly mountable on a vehicle is provided in which the boom is supported at a lower or working position by a first spring. A manually applied force selectively applies a moment to partially rotate a toggle device and to partially lift the boom to an upper or clearance position. The partial rotation of the toggle device activates a second spring and the boom is raised to a second position by the combined force of the manually applied force and the force of the second spring.

Abstract: A vehicle seat is carried on a frame which is pivotably mounted on a base frame that is secured to the vehicle floor. The seat can pivot around an axis that is essentially horizontal and transverse to the vehicle direction of travel. There is provided at least one damping element for damping pivotations around said axis. In this way disturbing thrusts transferred to the back of a person via the back support portion of the seat are eliminated.

Abstract: A resiliently-mounted vehicle seat has a resilient damped mounting between the seat frame and an underframe. The mounting seeks to avoid a construction which impedes up and down movement of the seat frame and tilting of a back rest pivotally connected to said seat frame.The seat frame is supported from the underframe by a scissors linkage and the scissors linkage includes an extension of one of the links which projects beyond the pivot for that link and carries a shock absorber. A cam surface is formed by the extension and a spring is carried on a shaft movable over the cam surface. The other end of the shock absorber and of the spring are carried on shafts mounted on an extension of the seat frame or the underframe.A feature of the arrangement is the facility to adjust the spring for different occupants with minimal force.

Abstract: A resiliently-mounted vehicle seat is provided with means for adjusting its height.The seat is of the kind having a seat frame supported from an underframe by scissors linkages. A link of each scissor linkage has an extension piece which is engaged by a spring and damping unit. The extension piece is pivotable about a pivot about which the associated link also pivots. The extension piece is releasably securable to the link through an intermediate link.The arrangement affords an adjustment mechanism which gives fine adjustment of the height while not affecting the installation height of the seat.

Abstract: A resiliently-mounted vehicle seat has a spring unit on the linkage between the seat frame and the underframe. The unit is interposed between the linkage and the seat frame and includes springs which extend between an extension of the linkage and the seat frame. The springs are connected to a bar which engages the extension at an adjustable position along its length to vary the restoring force of the springs on the linkage according to the weight of the occupant.Movement of the bar along the extension is controlled by virtue of a selective gripping action of the bar on the extension so that in the unloaded condition of the seat the bar does not grip the extension.As an additional feature a mechanism is provided for selecting the desired position of the bar on the extension when the seat is occupied, the bar moving when vibrations in the seat unload the unit.

Abstract: A vibration isolation system wherein a vibrating mass such as a helicopter rotor-transmission assembly is spring coupled to a body to be isolated, such as the helicopter fuselage, at a plurality of coupling locations. Each coupling location includes a weighted lever arm pivotally connected to the vibrating mass and to the body and a coupling spring connected to the weighted lever arm for transmitting the rotor forces of the rotor-transmission assembly to the fuselage through the pivot connections on the lever arm. The coupling spring is in the form of an elongated spring arm connected at one end to the weighted lever arm and at the other end to the body through a pivot link, the latter being required to accommodate shortening of the spring during flexure. The spring forces transmitted to the fuselage through the coupling springs due to linear vibration forces are cancelled at the characteristic rotor frequency by equal and opposite inertial forces produced by the weighted lever arms.