Abstract: A garter-type axially resilient coil spring includes a plurality of coils canted along a centerline thereof with each coil having a trailing portion and a leading portion. The disposition of the trailing portion is defined by a back angle between the trailing portion and a line normal to the centerline and the disposition of the leading portion is defined by a front angle between the leading portion and a normal line. Specific resilient performance, or load-characteristics, of the springs are obtained by controlling a turn angle of the coil spring. At selected turn angles, springs exhibit a resilient working area bounded by steep load-deflection characteristics.

Abstract: A garter-type axially resilient coil spring includes a plurality of coils canted along a centerline thereof with each coil having a trailing portion and leading portion. The disposition of the trailing portion is defined by a back angle between the trailing portion and a line normal to the centerline and the disposition of the leading portion is defined by a front angle between the leading portion and the normal line. Specific resilient performance, or load-deflection characteristics, of the spring is obtained by controlling the back angle. At selected back angles, the leading portion may be disposed at front angles beyond the range heretofore thought possible.

Abstract: An inhalation/exhalation valve for use in conjunction with a medical respiration apparatus to maintain an adjustable positive end expiration pressure through incorporation of novel valving elements including a novel, adjustable spring for establishing and maintaining the threshhold pressure of exhalation and a novel flow control valve disk structure which utilizes the dynamic pressure of exhalation flow to assist in providing control over and fine adjustability of the valve disk motion and which further permits continuous supply flow during both the inhalation and exhalation portions of the patient's breathing cycle.

Abstract: Vibration-damped spring for dynamic tension rollers, consisting of a tubular vibration damper with freedom of linear movement and a helical spring closely surrounding the damper wherein the helical spring has a middle section with turns of a larger diameter and in that, starting from that section, a continuous transition is provided toward the two ends with turns of a smaller diameter.

Abstract: The torsional vibration damper comprises in apertures in an input part and in an output part rotatable in relation to the input part coil thrust springs which couple the input part and the output part together in torsionally elastic fashion. Over a plurality of turns of the coil spring, the diameter of the wire material varies continuously from a first value to a second value. From one end of the spring to the other, it is possible for the diameter to diminish steadily. The diameter can however also either increase or decrease from the middle of the coil sprng towards the two ends. Springs of this type make it possible with relatively minimal structural expenditure to provide torsional vibration dampers which have a progressive characteristic.

Abstract: It is known that a sectional shape of a spring wire can be formed into an oval made by a semicircle and a semiellipse. However, it has been found that such a shape is not the best obtainable, and that stress distribution can be improved by increasing the diameter of the spring wire slightly in a portion where the stress is greatest, along the semielliptical surface. Parameters are disclosed for determining dimensions that result in increased energy efficiency.

Abstract: A coiled spring includes a plurality of coils with each of the coils being interconnected with one another in a spaced-apart relationship and disposed in a preselected acute angle with the centerline of the coil spring for causing the coil spring to exert a constant force in a loading direction approximately normal to the centerline of the coiled spring in response to a deflection of the coil spring along the loading direction. When placed in an operative relationship with a sealing material, the resulting coil spring seal enables positive sealing between cooperating parts to prevent passage of fluid therepast, despite small changes in the spacing between the parts which may change due to eccentricity and part dimension, wear, temperature, or pressure effects.

Abstract: A clutch pressure control valve for a hydraulically actuated friction clutch which includes a valve spool 5 disposed within a valve bore and having two control collars 6 and 7. The spool is acted upon at one end by a linear compression spring 8 and a speed dependent pressure signal, the spool serving to regulate the clutch pressure by regulating the free cross section at an outlet port disposed between its control collars. To avoid the second order variation of the clutch pressure with speed, the control collars 6 and 7 of the valve spool 5 have two different diameters and the spool 5 is disposed within a stepped bore 2, 3 and 4. The end of the linear compression spring 8, remote from the valve spool 5, abuts a reaction piston 9, which is disposed within the valve bore and is acted upon on one side by the speed dependent pressure signal and on the other side by a second, non-linear compression spring 11, which is compressed between the reaction 9 and a shoulder 12 in the valve bore.

Abstract: Prior to coiling, the wire to be used as the spring insert of twist-on connectors is mechanically worked to form at least two relatively sharp edges. When coiling is accomplished such edges are positioned to extend inwardly into the core of such coils to mechanically engage and retain conductors placed within said core.Similar sharp edges can be formed on spring inserts having a wide range of initial cross-section profiles.

Abstract: A tilt valve for an aerosol can is constructed so that it can be actuated only by transverse tilting forces. An output valve stem assembly is sealed to a valve housing whose inlet communicates with the interior of the aerosol can. A tilt element is biased against the bottom of the output valve assembly so as to seal the interior of the valve housing. A barrel-shaped spring is used to bias the tilt element so that the resistance of the output stem to tilting, and the stroke required for actuation, are reduced. The input stem and the bottom of the tilt element provide a secondary valve which is closed upon the output stem being subject to downward axial forces. Therefore, only transverse forces provided by an automatic actuating device can be used to actuate the tilt valve assembly.

Abstract: A self-telescoping cartridge magazine spring having two-sizes of coils with the smaller ones disposed at various points along the length of the spring, such that on compression they fit completely within the outer ones. The inner and outer coils are connected by straight sections within which the transition from one size to the other is made, so that they can bend laterally in order to conform to the space available without increasing the solid-height of the spring, while providing a substantially longer free-length, and therefore available compression, than that provided by magazine springs of prior designs.

Abstract: A cylindrical helically coiled compression spring made of a length of wire or rod having a circular cross section, the spring having interior windings providing the main spring action and end winding portions at least one of which is arranged to be supported against a spring disc, and the wire rod being formed to have a diameter which is greater in the region of the at least one end winding portion than in the region of the interior windings.

Abstract: A percussive tool has a working tool mounted for reciprocations in a barrel. A collar is arranged between a shank and a working portion of the working tool. The shank of the working tool reciprocates in a guide bushing secured in the barrel to ensure reciprocations of the working tool. There is provide4d a member for determining the angular position of the working tool during the reciprications, the member comprising either the barrel proper in case of concrete breakers, or a hood, e.g. in chipping hammers. For positively controlling the angular position of the working tool, there is provided a spring having two portions of different cross-sectional configuration, a first portion being coupled for a combined rotation to the member determining the angular position of trhe working tool, and a second portion being of a cross-sectional configuration corresponding to the cross-sectional configuration of the working portion of the working tool.

Abstract: An improved single cone coil spring and an improved box spring assembly made from the improved single cone coil springs. The box spring assembly comprises a base frame, a series of the improved small diameter single cone coil springs and a welded wire grid, the coil springs being connected at their bottom ends to the base frame and connected at their top ends to the welded wire grid. The coil springs are established in a plurality of rows and columns throughout the box spring assembly, at least one transverse wire and at least one longitudinal wire of the wire grid span all coil springs within each row and column, respectively. Further, a supplemental transverse wire is positioned between adjacent coil spring rows, and is of a length equal to at least one of the coil springs' transverse wires adjacent thereto. All crossover points of all the grid's transverse and longitudinal wires are welded to establish the welded wire grid.

Abstract: The packing of the present invention is a continuous coil which has at least three turns, and preferably about six turns. Each turn has at least three sides which preferably are generally curved and has a generally rounded vertex between each pair of adjacent sides. Each turn of the packing is rotatably offset at least about 15.degree., and preferably between about 15.degree. and 20.degree., relative to each adjacent turn of the packing. The coil packing preferably is generally cylindrical in cross-section, and defines a generally cylindrical passage which extends axially through the coil packing. The coil packing is suitable for use in columns or towers for absorption, adsorption or rectification.

Abstract: A helical compression spring having a partially progressive characteristic which has a cylindrical portion of constant wire thickness coterminously and integrally joined to a truncoconical portion whose coil of greatest coil diameter is disposed away from the cylindrical portion. The truncoconical portion has inconstant wire thickness with the coils of largest wire diameter being positioned between coils of smaller wire diameter.

Abstract: A tool comprises a body, a hammer accommodated in the body, a working implement removably received in the front end portion of the body, a differential spring having one end connected to the front end part of the body, and the other end of a tapered shape resting with its inner surface against the tapered outer surface of a sleeve, which embraces the working implement, in the direction of the rear end of the body so as to urge the sleeve with its rear end face against the front end face of the body and with the inner surface against the outer surface of the working implement, whereby the sleeve together with the spring form a resilient coupling between the body and the working implement, said coupling allowing the working implement to move forward at the instant of blow, with the working implement being jammed in the material being demolished, due to the expansion of the spring, while after the delivery of a blow said coupling causing the body to move forward under the action of the spring being contracted, w

Abstract: A coil spring guide, for use in connection with the insertion of a catheter into the vessels of a body, that has a coil spring, and a wire core extending within the coil spring and having a distal end welded to the distal end of the coil spring. The coil spring is made from metal wire that in a straightened condition is circular in transverse cross section throughout its length, and that after being coiled, to have adjacent helics abut against one another. Thereafter the radially outer circumferential portion of the coil is ground away to provide a helical radially outer spring coil surface (chordal surface) that is of a substantially constant radius throughout the axial length of the coiled wire and has a helix width of a chord parallel to the central longitudinal axis of the coil spring that is subtended by about a 10.degree.-140.degree. angle of two radii of the coil spring wire.