Valve

Details Valve Valve

A - Human Necessities

61

M

A61M 16/20 (2006.01) F16K 17/06 (2006.01)

Patent

CA 2045652

11. ABSTRACT (Figs 1 & 5) "A VALVE" Axial displacement between two components (10,17) of a valve occurs as a result of relative rotation through the cooperation of helical ramps (29,31). Preferably another pair of helical ramps (30,38) is provided concentric with the first but angularly offset 180° with the result that when the components (10,17) are at maximum 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 component (17) out of axial alignment with the component (10). In other constructions more than two pairs of ramps are employed. In the embodiment illustrated 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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