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US 6,231,468 B1Granted
Desmodromic mechanism
OwnerRoger Bajulazinventor
Life of this patent
Estimating the term…
Abstract
A desmodromic mechanism having transmission elements connected to and supported by an intermediate element and a primary and a secondary cam both in permanent contact with the transmission elements. The transmission elements, the intermediate element, the primary and secondary cams are assembled to one another to compulsorily move in rotation or linearly relative to one another. The various elements are also assembled in such a way as to form sealed variable volume chambers.
Claims13
A desmodromic mechanism comprising:
- plural movement transmission members, each having axial ends, said transmission members being connected to and bearing on an intermediate element;
- a primary cam in permanent contact with each of said transmission members;
- a secondary cam in permanent contact with each of said transmission members,
- wherein said transmission members have contact surfaces that are shaped to ensure permanent and simultaneous contact with said primary and secondary cams,
- said primary cam, said secondary cam and said intermediate element being assembled with each other so as to move rotatably and/or linearly relative to each other and with invariable differential speeds for all positions of the desmodromic mechanism,
- said intermediate element having rectilinear guides, said guides having guide axles, said transmission members freely sliding in said guides;
- a space being formed between two adjacent one of said transmission members, a portion of a body of said intermediate element being between said two adjacent transmission members, and a portion of said secondary cam being between said two adjacent transmission members;
- and
- two bearing surfaces in contact with said axial ends of said transmission members and said portion of said body and said portion of said secondary cam defining a sealed variable volume chamber as a function of a relative position of said primary and secondary cams and of said intermediate element.
6 more elements
A desmodromic mechanism comprising:
- plural movement transmission members having a known number of transmission members connected to and bearing on an intermediate element;
- a primary cam in permanent contact with each of said transmission members;
- a secondary cam in permanent contact with each of said transmission members,
- wherein said transmission members have contact surfaces shaped to ensure permanent and simultaneous contact with said primary and secondary cams,
- said primary cam, said secondary cam and said intermediate element being assembled with each other so as to move rotatably and/or linearly relative to each other and with invariable differential speeds for all the positions of the desmodromic mechanism;
- a body forming said intermediate element, said primary cam comprising a ring pivoted about said body, said ring having an internal eccentric surface, said secondary cam and a rod being movable axially in said body;
- a portion of said rod located within said body, said secondary cam having at least one region having an hourglass shape due to the rod being within said body, said body having rectilinear guides having guide axles, said guides being uniformly distributed about a periphery of said body, said guides being offset axially from each other, and
- said transmission members moving radially in said guides perpendicular to the axis of the desmodromic mechanism, said transmission members being permanently in contact with said primary cam and with said secondary cam as well as with said intermediate element.
5 more elements
Dependencies are inferred from the claim text.