Flexible coupling including a flexible diaphragm element contoured with its thinnest thickness near the center thereof

A flexible coupling, comprising:

• a plurality of annular diaphragm elements arranged in axial spaced relation on a common axis;
• each of said diaphragm elements being analytically optimized to include a contoured section having first and second portions, a circumferential rim section and an attachment section;
• the first portion of the contoured section merging with the circumferential rim section and extending radially-inwardly therefrom with a decreasing taper to near the center of the contoured section;
• and
• the second portion of the contoured section merging with the first portion thereof near the center of the contoured section and extending radially-inwardly therefrom with an increasing taper and merging with the attachment section.

A flexing coupling for two rotating shafts which are misaligned, comprising:

• first connector means having structure for attaching to a first of the two shafts;
• second connector means having structure for attaching to a second of the two shafts;
• said first and second connector means being arranged on a common axis;
• flexible diaphragm means arranged between and connecting said first and second connector means;
• said flexible diaphragm means including a plurality of annular diaphragm elements;
• each of said annular diaphragm elements having a circumferential rim and inwardly thereof a contoured section;
• and
• said contoured section being analytically optimized to include a first portion having a radially-inwardly decreasing thickness and extending to near the center of the diaphragm element and a second portion extending therefrom and having a radially-inwardly increasing thickness such that the thinnest section of the diaphragm element is near the center thereof, whereby bending moments developed by axial deflections are minimal at said thinnest section, and torsional stresses are maintained below the fatigue and endurance limits of the diaphragm element material throughout the diaphragm element.

A flexible coupling for two rotating shafts which are misaligned, comprising:

• first connector means having structure for attaching to a first of the two shafts;
• second connector means having structure for attaching to a second of the two shafts;
• said first and second connector means being arranged on a common axis;
• flexible diaphragm means arranged between and connecting said first and second connector means;
• said flexible diaphragm means including a plurality of annular diaphragm elements;
• each of said annular diaphragm elements having a circumferential rim section and an attachment section, and a contoured section extending radially-inwardly from the circumferential rim section to the attachment section;
• and
• said contoured section being analytically optimized to include a first portion having a radially-inwardly decreasing taper and extending from the circumferential rim section to near the center of the diaphragm and a second portion extending therefrom to the attachment section and having a radially-inwardly increasing taper such that the thinnest section of the diaphragm element is near the center thereof, whereby bending moments developed by axial deflections are minimal at said thinnest section, and torsional stresses are below the fatigue and endurance limits of the diaphragm element material throughout the diaphragm element.