2515results about "Low internal friction springs" patented technology

A high polymer resin material is configured into a shoe sole component having a plurality of inwardly extending indentations in one or both of the top and bottom members of the component. The indentations extend into the interval between the members and adjacent to the opposite member to provide support members for the sole component. The sole component can be constructed by molding upper and lower sole component halves wherein the molds are configured to provide indentations in the top and bottom members. The upper and lower sole component halves are then joined to complete the sole component.

A holding device for medical instruments, having a bracket on which at least one medical instrument can be affixed, at least one joint to position the bracket and a weight-relieving system to compensate the bracket load. The holding device is of compact and light structure and for cleaning purposes is completely autoclavable together with the bracket. The weight-relieving system is configured as a resetting element that is coupled with the bracket and is made of a material that essentially includes a plateau stress.

A prosthetic spinal disc uses a stiff spring or springs for resiliency between two plates that attach to adjacent vertebrae. When the disc has multiple springs, they may be adjacent, concentric or nested. Multiple springs may be spaced around the periphery of the plates. A foil metal bellows may surround the plates to prevent material from entering or exiting the space between the plates. Alternatively, the ends of the spring(s) may be machined with spikes to engage the vertebrae directly without plates.

A damping element (1) comprising (a) two spring elements (2, 4) which are coaxial with or parallel to a longitudinal axis (3) and two axially end-wise connectors (5, 6) which can be linked to the spring elements (2, 4), where (b) the first spring element (2) exhibits a spring rate F, (c) the second spring element (4) exhibits a spring rate f, and (d) the spring rates F and f are different. A system stabilizing adjacent vertebras includes: (a) N pedicle screws or pedicle hooks (12), with N≧3, and (b) at least one pedicle screw or one pedicle hook having a receiving device (13) which simultaneously allow receiving two parallel affixation devices (7), and where (c) an element (14) acting as a spring is used for affixation between the minimum of one pedicle screw or pedicle hook (12) including a receiving device (13) and a further adjacent pedicle screw or pedicle hook (12).

An electrically powered hydraulic fracturing system having pumps for pressurizing fracturing fluid, piping for carrying fracturing fluid, and vibration reducing equipment for use with the piping. The vibration reducing equipment includes helical coils that support the piping. The coils are made of a wire rope made of strands of steel cable twisted together. Grooved fittings are provided on some piping connections, and which allow pivoting between adjacent fluid conveyance members. Swivel joints are strategically located in the piping which allow rotational flexing between adjacent sections of the piping; thereby attenuating vibration in the piping but without stressing the piping.

An adjustable coil spring system placed within a leg of a vehicle such as a mountain bicycle fork. The spring system comprises an adjustable first soft spring seated on top of a second firm spring having greater length than the first soft spring. A coupler assembly is positioned between two springs comprised of a threaded bolt threadedly received within a coupler. A spring adjustment means may comprise a knob connected to the threaded bolt through a non-round shaped shaft, wherein the threaded bolt is disposed within the first soft spring. As the knob rotates, the coupler is moved up along the threaded bolt, decreasing the length of the first soft spring, thereby increasing firm spring characteristics of the spring system. As the knob rotates in an opposite direction, the coupler moves down, increasing the length of the first soft spring, thereby increasing soft spring characteristics of the spring system.

Cushioning elements having a top cushioning surface and a bottom base surface include an elastomeric cushion member and a stabilizing material. The elastomeric cushion member includes a first plurality of interconnected buckling walls having a first mean height and a second plurality of buckling walls having a second mean height. Each buckling wall of the second plurality intersects and connects to at least two buckling walls of the first plurality. A surface of the stabilizing material on a side thereof opposite the elastomeric cushion member defines the bottom base surface of the cushioning element. The first ends of the first plurality of interconnected buckling walls and the first ends of the second plurality of buckling walls define the top cushioning surface of the cushioning element. Methods of forming cushioning elements include securing a stabilizing material to ends of the first plurality of interconnected buckling walls.

A damping element includes: two spring elements which are coaxial with or parallel to a longitudinal axis and two axially end-side connectors, where the first spring element exhibits a spring rate F, the second spring element exhibits a spring rate f, and the spring rates F and f are different. A device stabilizing adjacent vertebrae, including N pedicle screws or hooks, where N is greater than or equal to 3 and where each pedicle screw or pedicle hook includes a receiving device receiving a longitudinal affixation device and where an element acting as a spring is inserted between two adjacent pedicle screws or pedicle hooks.

An improved composite for absorbing and dispersing impacting forces is disclosed. The composite includes a flexible plastic enclosure defining an internal cavity. The flexible enclosure is generally impermeable to air and capable of having its internal pressure changed. The composite further includes a foam core filling the cavity and retained within the cavity and adhered on substantially all of its external surface to the internal surface of the cavity. The cavity can be pressurized for higher impact absorbance. Methods for fabricating the composites are disclosed, as well.

A bedding or seating product comprises a pocketed spring assembly having a plurality of parallel strings of springs joined to each other. Each of said strings of springs comprises a row of interconnected pockets, each of the pockets containing at least one spring encased in a fabric pocket. An inflatable member is sandwiched between a lower scrim sheet and some strings of springs. When inflated, the inflatable member preloads select areas of the product.

A spring mattress comprising a plurality of interconnected coil springs (1) enclosed in covers (2), known as a pocket-spring mattress, is described, wherein at least two springs that are located adjacent to one another are spaced apart by an interjacent separation distance (SA), said separation distance exceeding approximately 10% of the diameter of the largest one of the spiral turns of the adjacent springs. Also described is a method of manufacturing a corresponding mattress.

Various structures, such as microstructures and wall-like structures, can include parts or surfaces that are oblique. In some implementations, a cantilevered element includes a spring-like portion with a uniformly oblique surface or with another artifact of an oblique radiation technique. In some implementations, when a deflecting force is applied, a spring-like portion can provide deflection and spring force within required ranges. Various oblique radiation techniques can be used, such as radiation of a layer through a prism, and structures having spring-like portions with oblique radiation artifacts can be used in various applications, such as with downward or upward deflecting forces.

The present invention is directed to a gelastic cushion. The gelastic cushion is made from a conventional gelastic composition. The gelastic cushion has a structure having a first wall that defines an opening area and buckles when a force is applied to the first wall. When the first wall buckles a predetermined amount, a second wall, interconnected to the first wall, also buckles. The second wall decreases the chance that the first wall bottoms out. Bottoming out increases the pressure on the patient (a.k.a., the force) overlying the gelastic cushion. That increased pressure is undesirable.

An impact-absorbing shock module comprises two pylons telescopingly engaged to permit axial and rotational motion therebetween. A resilient element, such as a spring-fluid combination, a plurality of interconnected disks, or a Belleville spring, provides axial shock absorption. A tubular torque-resisting cuff provides rotational resistance, or torsion-resistance. A fluid valve is optionally provided so that the fluid pressure may be varied to adjust the torsion resistance.

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.

A gripping device for a set of pinch rollers used in a wire feeder that supplies a welding operation with a consumable welding wire. The welding wire passes between the pinch rollers whereby the pinch rollers engage the wire with a gripping force and incrementally rotate to control the outflow of the wire to the welding operation. The gripping device has a first member which is displaceable relative to a second member and a spring mechanism extending between the first and second members which has at least a first and a second spring modulus. The spring mechanism produces the gripping force as the first and the second members are displaced toward one another. The gripper urges one roller of the set of pinch rollers toward the other roller of the set to engage the wire and to apply the gripping force. By including a spring with a first and second spring modulus, the gripper can apply a first range of gripping forces with the force produced by the first spring modulus and a second range of gripping forces with the force produced by the second spring modulus.

By providing an elongated profile which incorporates a plurality of indentations formed therein, a load bearing / cushioning / supporting element is realized. By employing this construction, the element accommodates large strain under force, and shows good resiliency and repeated recovery. The element can be produced from a continuous extrusion process with immediate manipulation to re-shape the extrusion profile, or secondary thermal forming process which follows the extrusion process, or blow molding process, or injection molding process.

A prosthetic spinal disc uses a stiff spring or springs for resiliency between two plates that attach to adjacent vertebrae. When the disc has multiple springs, they may be adjacent, concentric or nested. Multiple springs may be spaced around the periphery of the plates. A foil metal bellows may surround the plates to prevent material from entering or exiting the space between the plates. Alternatively, the ends of the spring(s) may be machined with spikes to engage the vertebrae directly without plates.

A tunable vibration isolation device comprising a magneto-rheological elastomer (MRE), and methods of using such a device, are provided. By manipulating a magnetic field within the MRE the device's stiffness is controlled. The vibration isolator can be constructed to provide shock absorption in one, two and three dimensions. Coupling the tunable device to a sensor feedback and a control system provides fast and accurate vibration isolation and energy dissipation for shock events in a variety of applications.

A spring assembly including a helical coil formed from a multi-strand cord.

An ortho-planar spring has a platform movably coupled to a base and being movable linearly with respect to the base along at least a portion of an axial direction perpendicular to both a base surface and a platform surface. A resilient and flexible connecting structure is connected to and between the base and platform. The connecting structure is bendable to develop (i) an axial force along the axial direction to bias the platform in a stable position with respect to the base, and (ii) non-axial forces which substantially sum to zero to preserve the orientation of the platform with respect to the base. Thus, the spring is very compact and does not have rotation between the deflecting ends. The spring may be associated with a valve opening, and a button for restricting flow through the valve opening, to bias the button at a position with respect to the valve opening.

The object of the invention is to provide sound insulating members exhibiting both high vibration damping performance and high sound insulation performance, a vibration damping material for affording such members and a resin composition for forming the vibration damping material. The invention provides a first resin composition for vibration damping materials which contains 100 parts by weight of a chlorine-containing thermoplastic resin, and 20 to 200 parts by weight of a chlorinated paraffin having 12 to 16 carbon atoms on average. The thermoplastic resin contains preferably 20 to 70 wt. %, more preferably 30 to 70 wt. %, of chlorine. The chlorinated paraffin is preferably 30 to 70 wt. %, more preferably 35 to 65 wt. %, in chlorination degree.

One example embodiment includes a resistance chamber for use in an exercise system. The resistance chamber includes a first chamber and a second chamber. The second chamber is configured to attach to the first chamber and rotate relative to the first chamber. The resistance chamber also includes a core rod. The core rod resides within the first chamber and the second chamber and is attached to the interior of the second chamber. The resistance chamber further includes a resistance tube, where at least of a portion the resistance tube is configured to be placed between the interior surface of the first chamber and the core rod.

A vibration damper for a tubular propeller shaft in the drive train of a motor vehicle having a mass body mounted concentrically, in the propeller shaft or in a sleeve attached in the propeller shaft, by way of at least one rubber spring element. Metal and / or flexible rubber stop elements that limit the vibration travel of the mass body at least in the radial direction are arranged between the mass body and the sleeve. Alternatively, the mass body and / or the sleeve are configured at least locally, in mutually opposite regions, as stop elements that limit the vibration travel of the mass body at least in the radial direction.

A bicycle with a torsional shock absorber comprised of a torsion spring assembly. The elements of the torsion spring assembly include: housing, a shaft positioned within the housing, a rubbery substance positioned between the interior surface of the housing and the outer surface of the shaft. The torsional shock absorber is mounted on the bicycle such that shock forces are converted into rotational forces tending to rotate the shaft within the housing. These rotational forces are resisted by the spring force created by the rubbery substance within the torsion spring assembly; thereby absorbing the shock forces. In a preferred embodiment, the rubbery substance is bonded to the interior surface of the housing and the outer surface of the shaft. In a preferred embodiment, the front and rear portions of the bicycle frame pivot about the pedal spindle axis. Also, in a preferred embodiment, the housing of the torsion spring assembly is rigidly connected to the front portion of the bicycle frame in-between the top tube and middle brace and just in front of the seat tube. The rear portion of the bicycle frame is pivotally connected to two torsion arms rigidly connected to the shaft.

An elastomeric spring suspension is described for supporting a longitudinally extending vehicle frame rail above first and second axles forming a tandem axle configuration. The suspension includes a frame hanger assembly mounted to the vehicle frame rail. The frame hanger assembly has two full spring modules, each of which includes two elastomeric shear springs, an elastomeric progressive spring rate load cushion having a pyramidal shape with a flattened top surface and a spring mount for mounting the springs. A saddle assembly is connected to the spring mount, and an equalizing beam is connected to the saddle assembly and further connected to the axles. The spring rate for the suspension increases almost linearly as a function of sprung load, resembling a pneumatic suspension. Accordingly, the suspension exhibits excellent ride quality, without sacrificing roll stability.