Abstract: A metal bellows for downhole use includes: a bellows capsule with a first end and a second end; an inner diameter side and an outer diameter side arranged between the first end and the second end; where the bellows capsule comprises a first bellows convolution and second bellows convolution and optionally additional bellows convolutions; and each bellows convolution comprises: a root on the inner diameter side of the bellows capsule; a first sidewall extending from the root toward the outer diameter side of the bellows capsule with a first connection point at the distal end; a second sidewall extending from the root toward the outer diameter side of the bellows capsule with a second connection point at the distal end and wherein the second sidewall is on the opposite side of the root as the first sidewall; wherein: the bellows convolutions are formed as a single piece; and the second sidewall connection point of the first bellows convolution is permanently affixed to the first sidewall connection point of the

Abstract: A vibration isolating thermally conductive connector includes a first thermally conductive element configured to draw heat from a heat source, a second thermally conductive element separated from the first thermally conductive element, and a flexible seal connected with the first and second thermally conductive elements and defining an enclosed cavity between the elements. The enclosed cavity contains a thermally conductive liquid, and allows limited movement of the second and first thermally conductive elements with respect to each other while maintaining thermal connection.

Abstract: A cantilever feedback mechanism includes an upper cantilever and a lower cantilever. The upper cantilever and lower cantilever have a resistance spring rate to facilitate movement of the bellows over a selected range of resistances. The upper cantilever has downwardly oriented upper cantilever stops. The lower cantilever has upwardly oriented lower cantilever stops that engage the upper cantilever stops. Mean are provided for applying a preload to maintain the lower cantilever stops and the upper cantilever stops engaged until a force urging movement exceeds the preload.

Abstract: Underspringing arrangements for mattresses are known, in particular for mattresses of furniture for sleeping on, which have resilient slats that act as support elements for the mattress and that at opposite ends are mounted with elastic bearing means on a frame. The bearing means and the resilient slats yield elastically when the mattresses are subjected to a load. Otherwise, however, the bearing means and the resilient slats are passive. The invention relates to stimulation actuators that exert any desired movements on the underspringing arrangement. The underspringing arrangement has lifting members (11) that are mounted elastically by means of elastic elements (14). The elastic elements (14) are arranged such that at least a main direction of work extends at an angle with respect to the direction of the movement of the lifting member. In this way, the lifting member (11) can have a particularly low overall height.

Abstract: An evacuated and hermetically sealed bellows assembly has a bellows core assembly for mechanical movement versus pressure differential requirements. Mechanical attachment means are secured to the opposite ends of the bellows assembly. Vibrational optimization is provided to the bellows assembly to reduce predetermined frequencies.

Abstract: The invention relates to a device for the movable connection of pipe ends, particularly of motor vehicle exhaust systems, with a flexible pipe element, such as a metal bellows, hose or the like, and with damped, spring elastic elements acting between the connection ends of the flexible pipe element. Such a device must have a simple construction, but must on the one hand compensate the relative movements acting between said connection ends and on the other ensure the necessary restoring forces for restoring the pipe element to its central position. In such a device, the invention provides for the elements to be held in expanding fastenings of supports parts, so that the linear spring characteristic of the elements is progressively modified by the expanding fastenings.

Abstract: A double-acting hydraulic piston-and-cylinder unit adapted to constitute a damper for movements in a human joint prosthesis has a boot sealingly connected to the cylinder and the piston rod to receive the hydraulic fluid under pressure as the hydraulic fluid is displaced from one or the other of two cylinder chambers upon displacement of the piston rod. The boot has a conically widening region or segment sealingly secured to the rod and adjoining the cylindrical segment of the boot surrounding the cylinder in a transition segment formed as an outwardly convex bulge and designed to ensure that initial inward movement of the piston rod will give rise to a plate membrane deformation of the elastic boot while only further displacement will result in a rolling action of the membrane. This ensures a generally cylindrical uniform configuration of the boot in all positions of the rod as is essential for effective use in a prosthesis.

Abstract: An improved vibration damping bellows mount or interconnection is disclosed. In one aspect, the bellows is compressively prestressed along its length to offset vacuum-generated tensile loads and thereby improve vibration damping characteristics.

Abstract: The invention relates to a universally movable suspension member for a direction indicating display system, especially for a gyro system (2), in which a bellows unit (1) is provided between a revolving disk (3) and the gyro system (2). The suspension member is designed as a double-bellows unit including two oppositely folded bellows (5, 6) so that, while a reliable and accurate indication is obtained, the volume of construction is decreased and the manufacturing costs are reduced.

Abstract: A hermetic seal, primarily for compressors for use in refrigeration or air conditioning systems but having use in apparatus wherein a seal is required between two elements reciprocating substantial distances relative to each other, comprising a bellows having a plurality of sections of convolutions with positive displacement means associated therewith that assures simultaneous movement of most of the convolutions upon rapid acceleration of relative movement between the two elements. This prevents excess stress and strain on any one or more convolutions, or on the end convolutions in particular, that could cause failure thereof by distributing the stress over a large number of the convolutions rather than just a few at any one instant. The stress in each convolution of the bellows depends upon the natural frequency and spring rates of any given bellows diameter and number of convolutions.

Abstract: Fatigue fractures in the bellows capsule of a bellows-type pressure sensor are prevented by wrapping the capsule with a vibration damping material such as an open cell polyurethane foam saturated with a fluid. In the preferred embodiment, wherein the sensor is employed in a gas turbine engine fuel control, the fluid may conveniently comprise liquid jet engine fuel.

Abstract: A pressure switching valve device including: a valve adapted to open and close an orifice defined in a valve seat; a diaphragm cooperating with the valve and so loaded as to maintain the valve in its open or closed position; and an atmospheric density compensating mechanism in engagement with the diaphragm to compensate for the opening and closing operations of the valve in response to the variation in atmospheric density, whereby the valve is opened and closed by impressing a given pressure on the diaphragm. This valve device features that the direction of a force exerted on the diaphragm so as to maintain the valve in its normally open or closed position is in coincidence with the direction of a force exerted by the atmospheric density compensating mechanism.