Patent ID: 9664205
Date: 2017-05-30
CPC Classifications: F04B,F15B,F16L

Claim:
1. A hydraulic damper comprising: a bladder made of elastic material and possessing a cylindrical shape, the bladder possessing one end and an other end, the bladder comprising a spherical closed end portion at the one end and an open end portion at the other end, the open end portion including an annular flange portion extending outwardly in the radial direction, the open end portion comprising an end face; a core including an inserted portion positioned within the bladder and an annular flange portion extending outwardly in the radial direction and contacting the end face of the open end portion of the bladder; the inserted portion comprising a large-diameter portion, a small-diameter portion and a gradually-changing diameter portion, the large-diameter portion being fitted in the open end portion of the bladder to seal the open end portion in a liquid-tight manner, the small-diameter portion extending in the bladder from the large-diameter portion toward the spherical closed end portion of the bladder, and the gradually-changing diameter portion being between the large-diameter portion and the small-diameter portion and forming an air chamber in the bladder together with the small-diameter portion, the small-diameter portion of the inserted portion of the core possessing a distal-most end, the distal-most end of the small diameter portion of the inserted portion of the core being spherically shaped; and a plug accommodating the annual flange portion of the bladder and the annual flange portion of the core and binding the bladder to the core at the annual flange portion of the bladder and the annual flange portion of the core, wherein the hydraulic damper is disposed in a discharge-side passage of a hydraulic pump.