Abstract

A rod for a piston and cylinder device has a rod spud having a spiral channel in an outer surface thereof. The spiral channel spirals around the rod spud in a longitudinal direction. The spiral channel provides a hydraulic fluid flow path between an internal volume of a barrel and an internal volume of a spud receiver of the piston and cylinder device when the rod spud is in the spud receiver. At least a portion of the spiral channel has a cross-sectional area that decreases continuously and gradually as the spiral channel spirals longitudinally away from a distal end of the rod spud. The spiral channel provides more controlled deceleration of the hydraulic cylinder rod until the end of the retraction stroke.

IPC Classes  ?

• F15B 15/22 - Other details for accelerating or decelerating the stroke
• F15B 15/14 - Fluid-actuated devices for displacing a member from one position to anotherGearing associated therewith characterised by the construction of the motor unit of the straight-cylinder type

Abstract

A sensing system for determining axial position of a cylindrical rod involves: a tapered rotatable shaft having a rotation axis, the shaft positionable so that the rotation axis is perpendicular to a translation axis of a cylindrical rod, the shaft having a tapered portion that is frictionally engageable with the cylindrical rod to be rotatable by the cylindrical rod when the cylindrical rod moves axially: a biasing element that biases the shaft in a direction parallel to the rotation axis of the shaft to continually maintain frictional engagement of the tapered portion of the shaft with the cylindrical rod when the shaft is engaged with the cylindrical rod: and, a sensor for detecting rotation of the shaft when the shaft is rotated by the cylindrical rod, the rotation of the shaft being correlated to the axial position of the cylindrical rod.

IPC Classes  ?

• G01D 5/14 - Mechanical means for transferring the output of a sensing memberMeans for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for convertingTransducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage

Abstract

A rod for a piston and cylinder device has a rod spud having a spiral channel in an outer surface thereof. The spiral channel spirals around the rod spud in a longitudinal direction. The spiral channel provides a hydraulic fluid flow path between an internal volume of a barrel and an internal volume of a spud receiver of the piston and cylinder device when the rod spud is in the spud receiver. At least a portion of the spiral channel has a cross-sectional area that decreases continuously and gradually as the spiral channel spirals longitudinally away from a distal end of the rod spud. The spiral channel provides more controlled deceleration of the hydraulic cylinder rod until the end of the retraction stroke.

IPC Classes  ?

• F15B 15/22 - Other details for accelerating or decelerating the stroke
• F16F 9/49 - Stops limiting fluid passage, e.g. hydraulic stops
• F16F 9/58 - Stroke limiting stops, e.g. arranged on the piston rod outside the cylinder

Abstract

A sensing system for determining axial position of a cylindrical rod involves: a tapered rotatable shaft having a rotation axis, the shaft positionable so that the rotation axis is perpendicular to a translation axis of a cylindrical rod, the shaft having a tapered portion that is frictionally engageable with the cylindrical rod to be rotatable by the cylindrical rod when the cylindrical rod moves axially; a biasing element that biases the shaft in a direction parallel to the rotation axis of the shaft to continually maintain frictional engagement of the tapered portion of the shaft with the cylindrical rod when the shaft is engaged with the cylindrical rod; and, a sensor for detecting rotation of the shaft when the shaft is rotated by the cylindrical rod, the rotation of the shaft being correlated to the axial position of the cylindrical rod.

IPC Classes  ?

• G01D 5/04 - Mechanical means for transferring the output of a sensing memberMeans for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for convertingTransducers not specially adapted for a specific variable using mechanical means using leversMechanical means for transferring the output of a sensing memberMeans for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for convertingTransducers not specially adapted for a specific variable using mechanical means using camsMechanical means for transferring the output of a sensing memberMeans for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for convertingTransducers not specially adapted for a specific variable using mechanical means using gearing

Abstract

In a piston and cylinder device, such as a hydraulic cylinder, potential or kinetic energy of the piston just before reaching the cylinder head at the end of a stroke can be mitigated using a rod spud/cushion sleeve arrangement where the rod spud and cushion sleeve comprise complementary continuously and gradually tapered portions forming an annular orifice having a cross-sectional area that dynamically, continuously and gradually decreases as an external tapered portion of the rod spud moves through an internal tapered portion of the cushion sleeve to the end of the piston stroke.

IPC Classes  ?

• F16F 9/49 - Stops limiting fluid passage, e.g. hydraulic stops
• F16F 9/58 - Stroke limiting stops, e.g. arranged on the piston rod outside the cylinder

Abstract

In a piston and cylinder device, such as a hydraulic cylinder, potential or kinetic energy of the piston just before reaching the cylinder head at the end of a stroke can be mitigated using a rod spud/cushion sleeve arrangement where the rod spud and cushion sleeve comprise complementary continuously and gradually tapered portions forming an annular orifice having a cross-sectional area that dynamically, continuously and gradually decreases as an external tapered portion of the rod spud moves through an internal tapered portion of the cushion sleeve to the end of the piston stroke.

IPC Classes  ?

• F16F 9/58 - Stroke limiting stops, e.g. arranged on the piston rod outside the cylinder
• F16F 9/18 - Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein
• F16F 9/49 - Stops limiting fluid passage, e.g. hydraulic stops

Abstract

A hydraulic rotary manifold has a core manifold having a barrel and a rotatable spindle inserted in the barrel. The core manifold is common to a variety of different configurations involving removable spindle-mounted and barrel-mounted manifolds, which may be removably mounted on the core manifold and exchanged for other removable manifolds to provide different hydraulic fluid flow paths in the rotary manifold using the common core manifold. The rotary manifold permits retrofitting a secondary fluid flow path to use a secondary fluid in conjunction with a work tool mounted on the rotary manifold. The rotary manifold permits mounting a rotary position encoder on a barrel-side of the rotary manifold permitting the use of the common core manifold when a rotary position encoder is desired. Electronically actuated cartridge valves may be integrated into the core manifold and/or removable manifolds to provide further customization of the hydraulic fluid flow paths in the rotary manifold and/or to provide cross-over relief paths within the rotary manifold itself.

IPC Classes  ?

• F16L 27/00 - Adjustable jointsJoints allowing movement
• F15B 13/02 - Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
• F16K 31/06 - Operating meansReleasing devices electricOperating meansReleasing devices magnetic using a magnet
• F16L 27/093 - Joints with radial fluid passages of the "banjo" type, i.e. pivoting right-angle couplings

Goods & Services

hydraulic swivels, being metal hardware in the nature of double-ended swivels; hydraulic fluid seals; hydraulic fluid fittings; hydraulic swivels; hydraulic manifolds, namely, metal manifolds for use with hydraulic systems; hydraulic fluid fittings, namely, rotary metal manifolds for hydraulic components of powered equipment, such as earth moving, agricultural, forestry and utility equipment; hydraulic swivels, namely, metal hose fittings for hydraulic hose connections that permit swiveling of the hoses relative to one another about a common axis [ hydraulic pumps; hydraulic liner actuators and hydraulic valve actuators ]

Goods & Services

(1) Hydraulic fluid seals; hydraulic fluid fittings; hydraulic swivels; hydraulic manifolds; hydraulic pumps; hydraulic actuators.

Abstract

A hydraulic fluid coupling for attaching two hydraulic hoses that comprises an inline swivel joint to prevent twisting of the hoses. The coupling comprises a first and second coupling portion, with the second coupling portion rotatable relative to the first coupling portion. There are two bearings and a ring shaped piston that slides toward the second bearing in response to fluid pressure inside the coupling. Engagement of the piston with the second bearing urges the second coupling portion towards the first coupling portion, against the action of fluid pressure between the first and second couplings. This reduces the load on the first bearing and transfers some of that load to the second bearing, thereby making it easier to rotate the second coupling portion.

IPC Classes  ?

• F16L 27/087 - Joints with radial fluid passages
• F16L 17/00 - Joints with packing adapted to sealing by fluid pressure