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US 6,644,172 B1Granted
Sliding device
AssigneeTaiho Kogyo Co., Ltd.
InventorsSeiichi Nakayama, Shogo Muramatsu, Akira Takenaka
Life of this patent
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AssigneeTaiho Kogyo Co., Ltd.
InventorsSeiichi Nakayama, Shogo Muramatsu, Akira Takenaka
Estimating the term…
A semi-spherical shoe 1 includes a semi-spherical surface 1A and a flat end face 1B. The semi-spherical surface 1A comprises a sliding contact region 1a which is disposed in sliding contact with a semi-spherical recess 2B formed in a piston 2, and a lead-in 1b which is located above the sliding contact region 1a or disposed toward a top (recess 1C) of the semi-spherical shoe. The lead-in 1b has a diameter D2 which is greater than the diameter D1 of the sliding contact region 1a, thereby allowing a clearance 8 to be produced between lead-in 1b and an opposing portion of the semi-spherical recess 2B in the piston 2. A reservoir of lubricant oil in a space 4 formed between the semi-spherical recess 2B and the recess 1C of the semi-spherical shoe 1 is introduced into the sliding contact region 1a through the clearance 8. A sliding system having an excellent sliding response over the prior art is provided.
A sliding system including a first movable member having a flat surface and a semi-spherical recess, a second movable member having a flat surface and a semi-spherical shoe having a semi-spherical surface which is fitted into the semi-spherical recess of the first movable member and an end face which is disposed in sliding contact with the flat surface of the second movable member, wherein an annular sliding contact region is formed on the semi-spherical surface in a region provided between the top of the shoe and the end face, the semi-spherical surface having a lead-in provided in a region located above the annular sliding contact region, the semi-spherical surface being arranged in the semi-spherical recess such that a clearance is formed between the lead-in and an opposing portion of the semi-spherical recess which gradually increases toward the top of the semi-spherical surface, the end face of the shoe comprising a flat annular sliding portion in slidable contact with the flat surface of the second movable member and a concave portion extending from the flat annular sliding portion and away from the second movable member and the outer perimeter of the flat annular sliding portion being located closer to the vertical axis line of the shoe than the inner perimeter of the annular sliding contact region.
A sliding system including a first movable member having a semi-spherical recess, a second movable member having a flat surface and a semi-spherical shoe having a semi-spherical surface which is fitted into the semi-spherical recess of the first movable member and an end face which is disposed in sliding contact with the flat surface of the second movable member, wherein a sliding contact region is formed on the semi-spherical surface in a region provided between the top of the shoe and the end face, the semi-spherical surface having a lead-in provided in a region located above the sliding contact region, the semi-spherical surface being arranged in the semi-spherical recess such that a clearance is formed between the lead-in and an opposing portion of the semi-spherical recess which gradually increases toward the top of the semi-spherical surface, a recess being formed in the top of the semi-spherical surface so that a space for serving as a reservoir for a lubricant is formed between the semi-spherical recess and the recess formed in the top of the semi-spherical surface and an opening being formed in the end face of the shoe so that a space for serving as a reservoir for a lubricant is formed between the flat surface of the second movable member and the opening formed in the end face of the shoe, wherein the recess formed in the top of the semi-spherical surface has a depth of about one-third the depth of the opening formed in the end face of the shoe.
Dependencies are inferred from the claim text.