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US 7,581,485 B2Granted
Working cylinder with terminal position damping
AssigneeNorgren Limited
InventorRalph Riedel
Life of this patent
Estimating the term…
Abstract
A working cylinder with end position damping which has at least one telescoping damping pin, which upon the approach to the corresponding end position of the piston plunges into a receiving opening, which closes off a damping chamber and forms a damping element, in an end part of the working cylinder or in the piston.
Claims21
A working cylinder with end position damping comprising:
- a cylinder body (1) having a cylinder chamber into which a pressure medium is introduced,
- two end parts (2, 3, 52, 53) closing the cylinder chamber at its ends,
- a piston (4) supported for longitudinal displacement in the cylinder chamber between two end positions,
- a damping device for damping the motion of the piston upon the approach to at least one of its end positions, said damping device including two cooperating damping elements (15, 19),
- a throttling device communicating with a dampening chamber for the throttled diversion of pressure medium enclosed within a dampening chamber upon the approach of the piston to its end position,
- one of said damping elements including a receiving opening (15) formed in one of the one end part or the piston, and the other damping element including a telescoping damping pin (11, 19, 59) that is insertable in sealed fashion into the receiving opening upon movement of the piston in a direction toward its end position, the damping pin (19) being supported for limited longitudinal displacement on the other of the one end part (52, 53) or the piston (40) between two terminal positions axially spaced apart from one another with respect to one of the piston (4) or the other end part, and said damping elements cooperate upon the approach of the piston to its end position for adjustably positioning the displaceable damping element to a first terminal position near the piston (4) or end part (52, 53), and upon movement of the piston away from its end position the displaceable damping element is adjustably positioned to a second terminal position which is farther away from the piston (4) or the end part, and
- said damping elements (15,19) having engageable frictional elements therebetween for resisting movement of said damping elements relative to each other from the first position during movement of said piston away from its end position for returning said displaceable damping element to the second position axially spaced from said first position before the damping elements are completely withdrawn from an insertable condition solely by the engagable frictional elements.
4 more elements
A working cylinder with end position damping comprising:
- a cylinder body (1) having a cylinder chamber into which a pressure medium is introduced,
- two end parts (2, 3, 52, 53) closing the cylinder chamber at its ends,
- a piston (4) supported for longitudinal displacement in the cylinder chamber between two end positions,
- a damping device for damping the motion of the piston upon the approach to at least one of its end positions, said damping device including two cooperating damping elements (15, 19),
- a throttling device communicating with a dampening chamber for the throttled diversion of pressure medium enclosed within a dampening chamber upon the approach of the piston to its end position,
- one of said damping elements being axially insertable into the other of said damping elements upon movement of the piston in a direction toward its end position, the one damping element (19) being supported for limited longitudinal displacement between two terminal positions axially spaced apart from one another with respect to the piston, and said damping elements cooperate upon the approach of the piston to its end position for adjustably positioning the displaceable dampening element to a first terminal position near the piston (4), and upon movement of the piston away from its end position the displaceable damping element is adjustably positioned to a second terminal position which is farther away from the piston (4), and
- said damping elements (15,19) having engageable frictional elements therebetween for resisting movement of said damping elements relative to each other from the first position during movement of said piston away from its end position for returning said displaceable damping element to the second position axially spaced from said first position before the damping elements are completely withdrawn from an insertable condition solely by said engagable frictional elements.
4 more elements
Dependencies are inferred from the claim text.