Damper device

Patent metadata

Field	Value
Publication number	US-2018223782-A1
Application number	US-201615748440-A
Country	US
Kind code	A1
Filing date	Jul 28, 2016
Priority date	Jul 31, 2015
Publication date	Aug 9, 2018
Grant date	—

Abstract

A damper device is provided in a flow passage of a fluid. The damper device includes a plurality of diaphragm dampers that are stacked together. Each of the plurality of diaphragm dampers includes a first flexible portion, a second flexible portion, and a rim including a welded portion. A peripheral edge of the first flexible portion and a peripheral edge of the second flexible portion are welded together in the welded portion. Each of the plurality of diaphragm dampers is configured to seal a gas in an inner region between the first flexible portion and the second flexible portion. A coupler that couples the plurality of diaphragm dampers together includes holders that hold the rims of the plurality of diaphragm dampers. A gap is provided between the holder of the coupler and the welded portion of each of the plurality of diaphragm dampers.

First claim

1 - 4 . (canceled)

5 . A damper device provided in a flow passage of a fluid,
the damper device comprising: a plurality of diaphragm dampers that are stacked together,
each of the plurality of diaphragm dampers including a first flexible portion including a first diaphragm and a first cover member, a second flexible portion including a second diaphragm and a second cover member, and a rim including a welded portion, peripheral edges of the first diaphragm and the first cover member and peripheral edges of the second diaphragm and the second cover member being welded together in the welded portion, each of the plurality of diaphragm dampers being configured to seal a gas in an inner region between the first diaphragm of the first flexible portion and the second diaphragm of the second flexible portion, and
a coupler that couples the plurality of diaphragm dampers together, the coupler including holders that hold the rims of the plurality of diaphragm dampers, a gap being provided between the holder of the coupler and the welded portion of each of the plurality of diaphragm dampers.

6 . The damper device according to claim 5 , wherein a length of the holder is greater than a length of the rim of each of the plurality of diaphragm dampers in a radial direction of the plurality of diaphragm dampers in a cross section including a central axis, where the central axis is a virtual straight line passing through respective centers of the plurality of diaphragm dampers in a stacked state.

7 . The damper device according to claim 5 , wherein the holder includes a first contact portion and a second contact portion, the first contact portion includes a distal end being in contact with the first flexible portion, the second contact portion includes a distal end being in contact with the second flexible portion, and
a distance between the first contact portion and the rim of each of the plurality of diaphragm dampers and a distance between the second contact portion and the rim of each of the plurality of diaphragm dampers each increase from a radially inner side toward a radially outer side of the plurality of diaphragm dampers.

8 . The damper device according to claim 5 , wherein a plurality of the couplers is provided in a circumferential direction of the plurality of diaphragm dampers.

Assignees

• Toyota Motor Co Ltd
• Denso Corp
• Eagle Ind Co Ltd

Inventors

• Yabuuchi Takeyuki
• Sugimoto Shinichi
• Hishinuma Osamu
• Yamada Hiroatsu
• Iwa Toshiaki
• Ogawa Yoshihiro
• Sato Yusuke

Classifications

• F02M55/04 Primary

  Means for damping vibrations {or pressure fluctuations} in injection pump inlets {or outlets} · CPC title

• F02M2200/26

  Fuel-injection apparatus with elastically deformable elements other than coil springs · CPC title

• F02M37/0041

  Means for damping pressure pulsations (equalisation of pulses in positive displacement pumps F04B1/00; devices for damping fluid pulsations in pipes F16L55/04) · CPC title

• F04B11/0016

  with a fluid spring · CPC title

• F02M2200/315

  for damping fuel pressure fluctuations · CPC title