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US 6,553,892 B1Granted
Mounting structure for piston packing
AssigneeSMC Corporation
InventorJunya Kaneko
Life of this patent
Estimating the term…
Abstract
A piston packing has a mounting surface and a seal surface. The seal surface and the mounting surface are fitted with a head and an annular groove portion, respectively, of a piston.
Claims5
A mounting structure for a piston packing for use in an actuator, said actuator comprising:
- a cylinder tube;
- end plates to seal openings on both ends of said cylinder tube;
- a piston to reciprocate along a bore in said cylinder tube, said piston having an annular groove portion, a head portion and a stepped surf ace between said annular groove and said head portion;
- and
- said piston packing being fitted into said piston and slidably coming into contact with an inner circumferential surface of said cylinder tube,
- wherein said piston packing is provided with a seal surface having a seal function to block the communication of one and the other sides of the bore and a mounting surface engageably attached to said piston to hold the piston packing, said seal surface and said mounting surface being separated by said stepped surface and being independent of each other such that said mounting surface is fitted in said annular groove of said piston and the entirety of said seal surface is fitted on and in contact with said head portion.
3 more elements
Dependencies are inferred from the claim text.