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US 3,939,947 AGranted
Dashpot for either push or pull damping
AssigneeAirpot Corporation
InventorsArthur M. Cohen, deceased, Irving Evall, Leonard Zalkin, executors
Life of this patent
Estimating the term…
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AssigneeAirpot Corporation
InventorsArthur M. Cohen, deceased, Irving Evall, Leonard Zalkin, executors
Estimating the term…
A dashpot is disclosed which can exhibit either push or pull damping depending upon the orientation of the valve members thereof. The dashpot includes a cylinder, a piston sealingly slidable within the cylinder and a piston rod operatively connected to the piston to move same. The piston is provided with a fluid flow channel which extends therethrough. A first valve member is operatively connected to the piston rod for movement therewith. A second valve member is mounted on said piston and has a fluid passage which communicates with the fluid flow channel of the piston. The first valve member is received within the second valve member in either a first or a second orientation relative thereto, thereby defining the direction of the damping force. The first and second valve members have parts which are operative, when force is applied to the piston rod in one axial direction or the other, to close or open the fluid passage respectively. One relative orientation of the valve members closes the fluid passage when the piston rod is urged in one axial direction and the other relative orientation of the valve members closes the fluid passage when the piston rod is urged in the other direction.
In a dashpot comprising a cylinder, a piston sealingly slidable in said cylinder, a piston rod operatively connected to said piston for moving the latter and fluid flow means extending through said piston;
In a dashpot comprising a cylinder, a piston sealingly slidable in said cylinder, a piston rod operatively connected to said piston for moving the latter and fluid flow means extending through said piston;
A dashpot or the like comprising a cylinder, a piston slidable within said cylinder, a rod for moving said piston within said cylinder, said piston having a fluid channel therethrough, and means for regulating the flow of fluid through said channel to resist movement of said piston within said cylinder in a given direction, said regulating means comprising a hollow casing mounted on said piston and having a port at each end thereof, one of said ports being in fluid communication with said channel, and valve means situated within said casing, said valve means comprising a body having a passage therethrough, a valve seat at one end of said passage and an aperture at the other end of said passage, said rod extending through one of said ports and being operably connected to a member to move the same, said member being movable within said passage and adapted to seal said seat when placed adjacent thereto due to movement in said given direction, said aperture and said member being shaped to prevent sealing engagement therebetween, said body having a bilaterally symmetrical outer configuration and said casing having a socket mating with said outer configuration of said body into which said body is received in either a first orientation with its valve seat towards said one of said ports or a second orientation with its valve seat toward the other of said ports whereby the selected orientation of said body determines said given direction.
Dependencies are inferred from the claim text.