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 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 fluid spring assembly. The spring assembly preferably includes a body that slidably supports a piston that is attached to a piston rod. The piston serves to define a fluid chamber within the body that is charged with a pressurized fluid medium. The piston is retained within the body by a rigid retainer member. A biasing member is provided between the retaining member and the piston for resisting the force generated by the fluid medium within the fluid chamber.

Abstract: A shock absorber for use between the reciprocating member of an oil well pumping mechanism and a polish rod connected to the rod spring and movable along a vertical pumping axis. The shock absorber comprises an upper and lower end plate having a peripheral surface around the plumping axis and defining a polish rod clearance opening. A coil spring is located between the plates and is concentric with and surrounding the pumping axis. A friction reducing centering head secured to at least one of the plates (preferably the lower plates) centers polish rod in the clearance opening and holds the polish rod away from the peripheral wall of the plate.

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 cushion assembly includes a lower end wall which is at least partially enclosed by a tubular cylindrical outer wall. An upper end wall is also partially enclosed by the outer wall. A tubular cylindrical inner wall extends between recesses in the lower end wall and the upper end wall. A piston is disposed within the inner wall and is movable along the inner wall toward the upper end wall under the influence of gas pressure. The piston is movable along the inner wall toward the lower end wall of the influence of force applied against the piston during operation of a press. A passage is formed between an end portion of the inner wall and the lower end wall to conduct a flow of lubrication liquid and gas to lubricate the piston.

Abstract: A spring device comprising at least one annular support plate defining a ring with a central axis; a plurality of circumferentially spaced, parallel oriented coil springs disposed about the at least one annular plate; and, a plurality of lock assemblies spaced about the plate. Each of the lock assemblies being in position within a spring cavity of one of the coil springs to allow additional springs to be provided on the spring device. In addition, the lock assemblies are dimensioned so that the coil spring is retained in a prestressed condition.

Abstract: A spring assembly comprising: an axially extending coil formed from a spring wire and having first and second ends and a length there between with an interior having a generally circular cross-section. The coil includes first end portion with a first diameter and extending inwardly from the first end, a second end portion with a second diameter and extending inwardly from the second end and a center portion with a third diameter between the end portions of the coil. An elongated core is placed within the interior of the coil at the center portion and two spaced lugs formed from the spring wire and extending chordally across the circular cross-section capture the core in the center portion.

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: Apparatus for machining a groove in an arcuate workpiece segment comprises a horizontal milling table, a carriage mounted on the table and supporting a workpiece to be machined, a milling guide mounted on the carriage and including a vertical post, an arm extending radially from the post, and a milling assembly attached to the arm and including a cutting tool overlying a workpiece mounted on the carriage. The table is movable in x and y directions in a horizontal plane to displace the workpiece along an arcuate path relative to the cutting tool, and the milling assembly is displaceable along a vertical axis to move the cutting tool toward and away from the workpiece.

Abstract: A spring device comprising a pair of spaced-apart first and second annular support plates defining a ring with a central axis; a plurality of circumferentially spaced, parallel oriented coil springs disposed between said annular plates; and, a plurality of guide assemblies located at circumferentially spaced positions around said ring, each of the guide assemblies including a first tab extending from one of the plates, a second top extending from the other of the plates to form a generally sliding contact between the first and second tabs as the plates move vertically to compress and/or release the coil springs wherein the first tab has a guide slot extending in a direction perpendicular to the plates and the second tab carries an assembled elongated guide member extending through the slot to guide vertical movement between the plates.

Abstract: A fluid spring assembly. The spring assembly preferably includes a body that slidably supports a piston that is attached to a piston rod. The piston serves to define a fluid chamber within the body that is charged with a pressurized fluid medium. The piston is retained within the body by a rigid retainer member. A biasing member is provided between the retaining member and the piston for resisting the force generated by the fluid medium within the fluid chamber.

Abstract: A fluid spring assembly. The spring assembly preferably includes a body that slidably supports a piston that is attached to a piston rod. The piston serves to define a fluid chamber within the body that is charged with a pressurized fluid medium. The piston is retained within the body by a rigid retainer member. A biasing member is provided between the retaining member and the piston for resisting the force generated by the fluid medium within the fluid chamber.

Abstract: A motor for controlling the elevating and lowering of a load comprises a storage drum, an output drum and a spring member operatively connected therebetween to provide a spring motor therewith, and a pair of cord drums aligned with and respectively adjacent the storage drum and the output drum. A gear train including an idler gear associated with the storage drum drivingly interengages the cord drums with the output drum, whereby the elevating and lowering of a load attached to the cords on the cord drums is balanced regardless of whether the elevating or lowering force is applied centrally between the points of attachment of the cords to the load.

Abstract: Improved membrane valve for transferring fluids or gases in hermetic or semi-hermetic compressors, including a method and system for manufacturing a membrane valve and a membrane valve with applications for use in several motors, particularly in hermetic or semi-hermetic compressors which use, as a refrigeration fluid, an appropriate type of gas thus promoting the refrigeration physical affect. The above mentioned gas is to be transferred from one chamber to the other, according to a pre-determined frequency, when utilized in conjunction with a piston. A body and a membrane are produced from substantially thin metallic plates separately in accordance to an available process and subjected to rounding in order to eliminate live comers, and then juxtaposed thus composing the valve, with the above mentioned membrane on one side, fitted to the body which is fixed through a connection process and, on the other side, left free to oscillate, thus allowing the passage of a fluid such as a refrigeration gas.

Abstract: A motor for controlling the elevating and lowering of a load comprises a storage drum, an output drum and a spring member operatively connected therebetween to provide a spring motor therewith, and a pair of cord drums aligned with and respectively adjacent the storage drum and the output drum. A gear train including an idler gear associated with the storage drum drivingly interengages the cord drums with the output drum, whereby the elevating and lowering of a load attached to the cords on the cord drums is balanced regardless of whether the elevating or lowering force is applied centrally between the points of attachment of the cords to the load.

Abstract: A Belleville spring comprising a thin strip of hardened spring steel coiled into a circular shaped body with a frusto-conical configuration having an inner diameter and an outer diameter, wherein the strip has two free ends and the coiled spring steel body has the free ends joined together.

Abstract: A self-lubricating cylinder assembly for use in a press operable in an upright orientation and in an inverted orientation. The cylinder assembly contains a working fluid under pressure and lubricating oil. The cylinder assembly includes a cylinder body that has sidewalls that terminate in an opening at a first end and an end wall at a second end. The cylinder assembly further includes an interior wall assembly that connects to the cylinder body and has walls that extend within the cylinder body to the end wall. The wall assembly walls are preferably formed of a cylinder liner in connection with an insert. The cylinder liner has a piston mounted for reciprocal motion therebetween. A variable volume wall assembly space is defined as a space between the piston, the wall assembly walls and the housing end wall. An expansion reservoir is defined as a space between the side walls of the cylinder body, the wall assembly walls and the cylinder body end wall.

Abstract: Improvement of the suspension of hermetic compressors for refrigeration in the interior of a hermetically closed shell (A) through a suspension (S) formed by a set of helicoidal springs (1), which extremities have upper (2) and lower (3) means of support and fitting to the corresponding parts of the compressor (C) and the shell (A); said upper and lower means of fixation of each spring (1) presents a truncated conical tip (4) for penetrating the internal diameter of the spring, while on the opposite end, it includes a flange (5) for seat, foreseeing inclusively an upper perforation (6) for the penetration of a pin (P) existent on the corresponding part of the compressor (C) so that the compressor (C) can be fixed in a springy way to the interior of the shell (A), using seating surfaces (7A), helicoidal or spiraled, practically the shape of one coil, where a step (8) that confers fitting and, at the same time, encloses the uneven circular surface that compensates the unevenness resulting from the tip (9) of th

Abstract: A Belleville spring comprising a thin strip of hardened spring steel coiled into a circular shaped body with a frusto-conical configuration having an inner diameter and an outer diameter, wherein the strip has two free ends and the coiled spring steel body has the free ends joined together.