Bladder and accumulator using the same
First Claim
Patent Images
1. A bladder for an accumulator, said bladder being adapted for mounting to an accumulator body and comprising:
- an elastic bag portion substantially defined by a wall having a first thickness, said bag portion having an opening at an end;
an integral stress concentration preventing wall section about said bag portion adjacent said opening, said wall section being substantially cylindrical about an axis and having an axial length with a substantially uniform second thickness less than said first thickness; and
a mounting flange around the opening and integrally connected to the wall section by a base portion having a third thickness greater than said second thickness;
wherein expansion of said bladder first expands said stress concentration preventing wall section in a circumferential direction into close contact with an inner surface of said accumulator body.
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Abstract
A mounting flange is formed at the opening of the bladder formed into the shape of a bag from elastic material such as rubber; and a thin wall section is formed to prevent stress concentration near the base of the mounting flange.
24 Citations
18 Claims
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1. A bladder for an accumulator, said bladder being adapted for mounting to an accumulator body and comprising:
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an elastic bag portion substantially defined by a wall having a first thickness, said bag portion having an opening at an end; an integral stress concentration preventing wall section about said bag portion adjacent said opening, said wall section being substantially cylindrical about an axis and having an axial length with a substantially uniform second thickness less than said first thickness; and a mounting flange around the opening and integrally connected to the wall section by a base portion having a third thickness greater than said second thickness; wherein expansion of said bladder first expands said stress concentration preventing wall section in a circumferential direction into close contact with an inner surface of said accumulator body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A bladder for an accumulator, said bladder being adapted for mounting to an accumulator body and comprising:
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an elastic bag portion substantially defined by a wall having a thickness A, said bag portion having an opening at an end; an integral stress concentration preventing wall section about said bag portion adjacent said opening, said wall section being substantially cylindrical about an axis and having an axial length with a substantially uniform thickness B; and a mounting flange around the opening and integrally connected to the wall section by a base portion having a thickness C; wherein B<
0.65 A; andwherein expansion of said bladder first expands said stress concentration preventing wall section in a circumferential direction into close contact with an inner surface of said accumulator body. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification