Abstract:
An accumulator assembly for managing pressurized fluid includes a housing and a partition provided in the housing moveable in response to fluid pressure imparted on the partition. A deflection member is disposed in the housing and is displaceable between a first position and a second position. The deflection member includes at least one deflection element including a first end and a second end and a flexing portion therebetween. The deflection member provides a resistive force between the first and the second positions of the deflection member in response to movement of the partition. The resistive force is substantially constant between the first and said second positions of the deflection member.
Abstract:
A method of forming a floating piston includes fabricating a piston cup, wherein the piston cup includes a top, a sidewall void of any seal-gripping irregularities, and an open end, and forming an elastomer seal over the sidewall of the piston cup. A floating piston includes a piston cup having a top, a sidewall extending about the periphery of the top and an open end, wherein the sidewall is void of any seal-gripping irregularities; and an elastomer seal formed about the sidewall of the piston cup.
Abstract:
Disclosed is an accumulator comprising a cylindrical shell including a cylindrical portion, a partitioning member for partitioning the interior of the shell into a hydraulic chamber and a gas chamber, and a port including a hydraulic fluid flow path for communicating the exterior of the shell and the hydraulic chamber. The variation of the pressure of a hydraulic fluid flowing into the hydraulic chamber is accommodated by expansion and compression of a gas in the gas chamber according to expansion and contraction of the partitioning member. The port is approximately airtightly inserted into the cylindrical portion of the shell, and is welded to an outer circumference of the cylindrical portion by means of welding.
Abstract:
Disclosed is an accumulator comprising: a pressure vessel; an elastic bellows in which a compressed gas is sealed, an end of the bellows being fixed to an interior of the pressure vessel; a flow path having an opening communicating with the interior and an exterior of the pressure vessel; a valve connected to a movable end of the bellows to operatively close the opening according to elastic motion of the bellows; and a hydraulic chamber partitioned from a gas chamber formed in an interior of the bellows containing the compressed gas. The valve comprises an upper surface which can cover the opening, and plural circular protrusions which surround the entire circumference of the opening and can closely contact the circumference of the opening.
Abstract:
A device to save energy for hydraulically-operated tool shanks uses a piston-type accumulator having a housing in which at least two longitudinally displaceable pistons are arranged and are connected to by a coupling part. The coupling part is guided to be longitudinally displaceable in a partition wall of the housing which bounds two fluid chambers with the two pistons. At least one of the pistons bounds at least partially, a fluid chamber and a pre-loaded chamber with presettable internal gas pressure on the opposite sides. A wider range of possible applications is achieved for hydraulically-operated tool shanks using this energy saving device.
Abstract:
A media divider has a divider piston, which is received in a cylinder bore and embodied as a tubular deep-drawn part. Two pairs of a sealing ring and an annular guide part disposed side by side are provided, whose axial spacing is defined by at least one spacer bushing disposed coaxially with the divider piston. The two pairs comprising the sealing ring and guide part as well as the spacer bushing may be axially fixed either in the cylinder bore or on the divider piston. The media divider may be used in the form of a plunger or as a reservoir in a fluid-carrying brake system.
Abstract:
A compact hydraulic unit for slip-controlled brake systems with several hydraulically, mechanically and/or electrically operable functional elements (e.g. accumulator, valve elements, pressure generating and driving elements) arranged in an accommodating member, with several pressure fluid channels connecting the functional elements. The pressure fluid channels create a hydraulically operable connection between at least one pressure fluid supply means and one pressure fluid consumer. A control device can be connected with the valve and the driving elements by means of electrical conductors. The valve elements are arranged in several valve accommodating bores of the valve accommodating member in a first and a second row. Pressure fluid bores are provided between the two diametrically extending valve rows which connect the valve elements and location bores containing the pressure generating element and the driving element. Outside the two valve rows, there are further location bores in the valve accommodating member in which pressure accumulator pistons are positioned.
Abstract:
A piston-type accumulator has a cylindrical outer case, a piston slidably fitted in the cylindrical outer case, and a cap mounted in an open end of the outer case. The piston-type accumulator includes a cap attachment structure in which said cap has two larger- and smaller-diameter steps on an outer circumferential surface. The cylindrical outer case is deformed by staking on said larger- and smaller-diameter steps. The piston has an annular recess defined in an outer circumferential surface thereof axially between two seals thereon. The annular recess communicates with the atmosphere through a collapsible tube.
Abstract:
A hydraulic pump composed of a pump and an accumulator combined therewith has an outer shell divided into an accumulator cylinder of metal and a tank of resin. The accumulator cylinder and said tank have thicker side portions, respectively, which define therein an outlet oil passage and an inlet oil passage, respectively.
Abstract:
A pressure fluid reservoir having at least an approximately vertically disposed cylinder with a displaceably guided divider piston therein. The piston divides a pressure fluid reservoir chamber of the cylinder, located below the piston from a gas chamber located above the piston. The divider piston has a hollow chamber, which is covered with respect to the gas chamber by a cap having an opening. The cap has a fluid seal for lubricating piston sealing rings. A riser pipe that begins at an opening in the cap extends as far as a bottom of the hollow chamber that contains fluid. In an expansion of a gas cushion located in the gas chamber in the riser pipe and in the hollow chamber, fluid is pumped through the riser pipe to the fluid seal, to regenerate it the fluid seal. The pressure fluid reservoir is particularly well suited to vehicle brake systems, where long functional reliability of a piston seal is crucial.