End Member Assemblies and Gas Spring Assemblies Including Same

A gas spring assembly comprising:

• a flexible spring member having a longitudinal axis and including a flexible wall extending peripherally about said longitudinal axis between a first end and a second end of said flexible spring member to at least partially define a spring chamber therebetween;
• an end member secured across said first end of said flexible spring member such that a substantially fluid-tight connection is formed therebetween;
• and,
• an end member assembly secured across said second end of said flexible spring member such that a substantially fluid-tight connection is formed therebetween, said end member assembly including:
• a first end member section including a first section wall extending peripherally about said longitudinal axis, said first section wall including:
• a first end wall portion oriented transverse to said longitudinal axis;
• a mounting wall portion extending from along said first end wall portion in a first axial direction, said mounting wall portion dimensioned to sealingly engage said second end of said flexible spring member;
• a first outer side wall portion extending from along said first end wall portion in a second axial direction that is opposite said first axial direction toward a first outer distal edge that is axially offset from said first end wall portion by a first outer side wall distance, said first outer side wall portion disposed radially outward of said mounting wall portion and at least partially defining a first end member chamber;
• and,
• a first inner side wall portion disposed radially inward of said first outer side wall portion and extending from along said first end wall portion toward a first inner distal edge that is axially offset from said first end wall portion by a first inner side wall distance that is less than said first outer side wall distance of said first outer side wall portion such that a recess extends into said first end member section from along said first outer distal edge, said recess having a frustoconical or concave shape projected between said first inner distal edge and said first outer distal edge;
• and,
• a second end member section including a second section wall extending peripherally about said longitudinal axis, said second section wall including:
• a second end wall portion oriented transverse to said longitudinal axis and including an outer peripheral edge;
• and,
• a second inner side wall portion extending from along said second end wall portion in said first axial direction toward a second inner distal edge that is axially offset from at least one of said second end wall portion and said outer peripheral edge by a second inner side wall distance such that said second end member has a frustoconical or convex shape projected between said second inner distal edge and said outer peripheral edge of said second end wall portion;
• said second end member section at least partially received within said recess of said first end member section such that said first and second inner distal edges are disposed adjacent one another, and said first and second end member sections connected to one another along a flowed-material joint formed between said first outer distal edge and said outer peripheral edge such that a substantially fluid-tight seal is formed therebetween;
• and,
• said gas spring assembly displaceable during use from a design height toward a fully-compressed height at which said end member and said end member assembly are disposed closer to one another than at said design height, said flexible spring member forming a rolling lobe along a first outer side surface portion of said first outer side wall potion of said first section wall with said rolling lobe disposed in a design position at said design height of said gas spring assembly and disposed in a compressed position at said fully-compressed height of said gas spring assembly such that said flowed-material joint of said end member assembly remains axially-offset away from said rolling lobe of said flexible spring member in at least said fully-compressed height of said gas spring assembly.