Valve with paired helical ramps
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 25, 1992
Grant Date -
N/A
app pub date -
Jul 17, 1991
filing date -
Feb 1, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Axial displacement between two components of a valve occurs as a result of relative rotation through the cooperation of helical ramps. Preferably another pair of helical ramps is provided concentric with the first but angularly offset 180.degree. with the result that when the components are at maxinum axial separation the residual contact between the ramps of each pair (shaded areas in FIG. 5e) will be on opposite sides of the axis x of rotation and prolongation, thus preventing tilting of the one component out of axial alignment with the other component. In other constructions more than two pairs of ramps are employed. The ramp means of the invention replaces a screw-thread to provide adjustment of the loading of a valve spring and permits the use of more economical manufacturing and assembly techniques.
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