Abstract: A shock absorber for towbars provides damping forces that reduce forces when stopping and starting during towing operations of aircraft.

Abstract: A shock absorber system may include at least one sensor that is configured to measure an operating parameter of the shock absorber during operation of the shock. The system may be configured to determine Time-Through-Stroke (TTS) and/or Rod Return Time (RRT) utilizing data from the sensor or sensors. The system may be configured to utilize machine learning to detect and/or predict a failure of the shock absorber.

Abstract: A shock absorber system may include at least one sensor that is configured to measure an operating parameter of the shock absorber during operation of the shock. The system may be configured to determine Time-Through-Stroke (TTS) and/or Rod Return Time (RRT) utilizing data from the sensor or sensors. The system may be configured to utilize machine learning to detect and/or predict a failure of the shock absorber.

Abstract: A shock absorber system may include at least one sensor that is configured to measure an operating parameter of the shock absorber during operation of the shock. The operating parameter may comprise one or more of pressure, temperature, a position of a piston rod of the shock absorber, a velocity of the piston rod, and/or an acceleration of the piston rod. The system may be configured to evaluate measured operating parameter data and to predict a lifespan of the shock absorber and/or detect failure.

Abstract: A shock absorber system may include at least one sensor that is configured to measure an operating parameter of the shock absorber during operation of the shock. The operating parameter may comprise one or more of pressure, temperature, a position of a piston rod of the shock absorber, a velocity of the piston rod, and/or an acceleration of the piston rod. The system may be configured to evaluate measured operating parameter data and to predict a lifespan of the shock absorber and/or detect failure.

Abstract: A hydraulic shock absorber has an outer body with a central bore. A first piston is telescopingly received in the central bore adjacent a closed end thereof, and has a generally annular shape with an inner surface defining a central piston bore, and an outer surface disposed adjacent the sidewall of the central body bore to define a first annularly-shaped metering aperture. A second piston is telescopingly received in the central bore of the first piston, and has an outer surface disposed adjacent to the inner surface of the first piston to define a second annularly-shaped metering aperture therebetween. Hydraulic fluid is disposed in the central body bore between the closed end thereof and the pistons, such that inwardly directed impact forces on the pistons displace the hydraulic fluid through the metering apertures to progressively dampen the impact forces.

Abstract: A high frequency dampening apparatus for dampening the travel of a high frequency cycling driver. The present invention provides an enclosed housing having a fluid disposed therein. A piston rod is partially disposed within the housing and is engageable with a high frequency driver wherein the piston rod moves between a rearward position and a forward position relative to the housing. A plurality of fingers are circumferentially spaced and extend radially outward from the piston rod. A piston head retainer is connected to and extends radially outward from the piston rod and provides an orifice extending therethrough.

Abstract: A quick change shock absorber for providing the quick and easy removal of a shock absorber from a fixture of an industrial machine. The quick change shock absorber provides a housing having a bore adaptable to hold a fluid therein. A piston is slidably disposed within the bore of the housing and is engageable with a driver for movement between an extended position, wherein the piston has a portion extending outwardly from the housing, and a retracted position, wherein the piston is disposed within the housing. A connecting member extends from the housing and is engageable with a fixture having a bore therein for releasably connecting and locating the housing to the fixture.

Abstract: An adjustable shock absorber for applying a force to a moving member so as to decelerate the member. The present invention provides a cylindrical outer tube having a plurality of circular, angular grooves formed in the inner surface of the tube. A cylindrical inner tube is rotatably disposed within the outer tube. A piston is slidably disposed within the inner tube and is engageable with the moving member. The piston moves between a compressed position and an extended position. The inner tube has a plurality of apertures extending therethrough and fluidly communicatable with the grooves in the outer tube. A screw thread is formed in the outer surface of the inner tube and is fluidly communicatable with the grooves in the outer tube. The inner tube and the outer tube rotate with respect to each other to adjust the level of fluid communication between the rearward end and the forward end of the shock absorber to adjust the level of force applied to the moving member.

Abstract: A pneumatic cylinder having internal hydraulic dampening device for cushioning the motion of a pneumatic piston (44) at its end of stroke. The hydraulic device includes a pair of hydraulic pistons (50, 52) cooperating with a pair of hydraulic cylinders to form a pair of hydraulic chambers (58, 64), which communicate with each other by a restricted flow passage (74). When the pneumatic piston nears its end of stroke, one of the hydraulic pistons is moved to compress the corresponding hydraulic chamber, forcing hydraulic fluid through the restricted flow passage, to the other hydraulic chamber. The flow of hydraulic fluid through the restricted flow passage slows the pneumatic piston, thereby cushioning the end of stroke motion. The restricted flow passage can include a plurality of flow passages which are sequentially closed by pins (136, 138, 140, 142) connected to one of the hydraulic pistons, as the hydraulic piston moves, to vary the restriction in the flow passage.

Abstract: A nonadjustable shock absorber that can accommodate for variations in weight, and propelling force, and to provide a specific deceleration or reaction force. The shock absorber provides dual function metering that combines soft contact dampening with the self compensating ability to decelerate a wide range of weights.

Abstract: A nonadjustable shock absorber that can accommodate for variations in weight, and propelling force, and to provide a specific deceleration or reaction force. The shock absorber provides dual function metering that combines soft contact dampening with the self compensating ability to decelerate a wide range of weights. The shock absorber includes a low pressure zone, a hydraulic cylinder having a high pressure zone chamber, a piston in said cylinder for movement under a shock load through a predetermined stroke length, a fluid pathway metering control means, having four fluid metering pathways of which the first three fluid metering pathways are approximately linear spaced apart, for controlling high pressure fluid escaping from the high pressure zone chamber into the lower pressure zone, ahead of the piston as the piston moves from an initial position in response to a shock load through a total stroke to a final position, to create five control zones during the compression of the shock absorber.

Abstract: A shock absorber having a tubular body member provided with an accumulator chamber in one end thereof, and an axially aligned piston chamber in the other end thereof. A combination piston and piston rod member is telescopically mounted in the piston chamber. A check valve assembly is mounted in the tubular body member, which permits a metered flow of shock absorber oil from the piston chamber into the accumulator chamber when the combination piston and piston rod member is moved in an inward direction in the tubular body member, and which allows a free flow of the oil from the accumulator chamber when the combination piston and piston rod member is moved in an outward direction in the tubular body member.

Abstract: The invention relates to a hydraulic shock absorber with two-way action, in which two pistons (18, 19), one for each direction of motion, act in a housing (1). The pistons (18, 19) are movable relative to each other in, or with, a pressure tube (6). Equalizing elements (4, 5) are provided at the ends. The pistons (18, 19) are each provided with a piston rod. The piston rods are provided with seals (38, 39) which are nearly completely relieved of pressure.

Abstract: A holding or checking means for holding the control rod of a reciprocating drill feed control apparatus in position after each advancing movement of an automatic drilling machine during a "peck drilling" operation. The holding means includes a cylindrical body adapted to be fastened over the end of a drill feed control apparatus and with the control rod of the feed control apparatus extended through said body. A pair of pivotally mounted yoke arms are mounted on a cylindrical body and have semi-circular recesses adapted for friction holding engagement with the feed control rod to hold it in an advanced position when the reciprocating drill apparatus is retracted. The holding means includes a biasing means for biasing the yoke arms into friction engagement against the control rod.

Abstract: A hydraulic shock absorber having an outer tube which is closed at one end and open at the other end. An inner tube, having a plurality of metering orifices, and having a closed inner end and an open end, is mounted in the outer tube with its closed end against the closed end of the outer tube. A meter tube, having a plurality of metering openings, is rotatably mounted above the inner tube. The inner tube is retained in its longitudinal operative position by the meter tube, a rotatable retainer member, and a wave washer. A locking pin retains the inner tube against rotation. The inner tube, meter tube, and the rotatable retainer member are all assembled into the outer tube through the open end of the outer tube, and they are retained in the outer tube by a retainer member. A meter tube adjusting ring is rotatably mounted on the outer tube, and it is connected to the meter tube for adjusting the position of the metering holes in the meter tube relative to the metering orifices in the inner tube.

Abstract: A heavy duty hydraulic shock absorber having an inner tube in which is slidably mounted an impact receiving piston assembly. Upon application of an impact force on the piston assembly, the piston assembly is moved inwardly of the inner tube and fluid from the inner tube is metered through a plurality of exponentially disposed metering orifices into an accumulator chamber formed between the inner tube and an outer tube which encloses the inner tube. An adjustable, slidable metering spool is operatively mounted in the accumulator chamber, over the metering orifices, for regulating the flow of fluid through the metering orifices into the accumulator chamber.

Abstract: An adjustable hydraulic shock absorber of the dashpot type which includes an elongated outer tube and an inner tube fixed in said outer tube. A piston is movably mounted in the inner tube and has a piston rod extended outwardly of the outer tube for receiving reciprocating actuating loads. A double action, flexible, tubular diaphragm is positioned in the outer tube, with its inner end secured to the outer tube in a position surrounding one end of the inner tube, and with its outer end secured to the piston rod, so as to form an expandable fluid reservoir. The reservoir is connected by passageway means to the inner tube. The reservoir, passageway means and inner tube are normally filled with fluid under pressure so as to normally move the piston to an initial load receiving position.

Abstract: A noise-preventing shock absorber adapted to suppress noise and absorb shock created by moving objects such as moving machine parts engaging mating surfaces and decelerating to zero velocity within a short stroke or travel distance. The shock absorber includes a unitary resilient member which is annularly shaped in plan view and provided with an axial opening, with the peripheral surface of the axial opening comprising an inner force-transmitting surface that is formed with a wavelike configuration in vertical cross section. An upper force-receiving shaft is disposed in the resilient member axial opening and has an exterior peripheral surface which is provided with a wavelike configuration in vertical cross section that mates with and is bonded to the wavelike inner force-transmitting surface of the resilient member.