Damper With Two-Piece Shell
US-2020124129-A1 · Apr 23, 2020 · US
Manufacturing method for cylinder device
US11661994B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11661994-B2 |
| Application number | US-201816766763-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 25, 2018 |
| Priority date | Nov 28, 2017 |
| Publication date | May 30, 2023 |
| Grant date | May 30, 2023 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
A manufacturing method for a cylinder device which includes a cylinder, a piston, a piston rod, a seal member, and an installing member, the method includes: a welding step for fixing the installing member to the cylinder through electrical resistance welding; a demagnetizing step for demagnetizing at least an opening portion of the cylinder; and an assembling step for assembling the piston, the piston rod, and the seal member in the cylinder through the opening portion.
First claim
Opening claim text (preview).
The invention claimed is: 1. A manufacturing method for a cylinder device which includes: a cylinder having one side having an opening portion provided therein; a piston provided in the cylinder; a piston rod having one side coupled to the piston and the other side extending from the cylinder; a seal member provided in the opening portion of the cylinder and configured to seal a working fluid sealed in the cylinder; and a mounting member provided on an outer circumferential side of the cylinder, the method comprising: a welding step for fixing the mounting member to the cylinder through electrical resistance welding; a demagnetizing step for demagnetizing at least the opening portion of the cylinder; a coating step for coating the outer circumferential side of the cylinder, performed between the welding step and the demagnetizing step; and an assembling step for assembling the piston, the piston rod, and the seal member to the cylinder through the opening portion, wherein in a duration from the coating step to the demagnetizing step, coating and demagnetizing of the cylinder are performed without removing the cylinder from a hanger. 2. The manufacturing method for a cylinder device according to claim 1 , further comprising: a drying step for drying the cylinder after the coating step, wherein the demagnetizing step is performed after the drying step. 3. The manufacturing method for a cylinder device according to claim 1 , further comprising: a swaging step for reducing a diameter of the opening portion of the cylinder performed before the demagnetizing step.
Assignees
Inventors
Classifications
Tubular or hollow articles · CPC title
pistons · CPC title
Welding · CPC title
Spot welding · CPC title
Sealings for elements other than pistons or piston rods, e.g. valves · CPC title
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- What does patent US11661994B2 cover?
- A manufacturing method for a cylinder device which includes a cylinder, a piston, a piston rod, a seal member, and an installing member, the method includes: a welding step for fixing the installing member to the cylinder through electrical resistance welding; a demagnetizing step for demagnetizing at least an opening portion of the cylinder; and an assembling step for assembling the piston, th…
- Who is the assignee on this patent?
- Hitachi Automotive Systems Ltd
- What technology area does this patent fall under?
- Primary CPC classification F16F9/54. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue May 30 2023 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).