# US 5,707,048 A · Vibration dampening device with an elastic body and viscous liquid

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- Number: US 5,707,048 A
- Document ID: US5707048A
- Status: Granted
- Kind: A
- Application number: 08/659,233
- Filed: 1996-06-05
- Granted: 1998-01-13
- Earliest claimed: 1994-02-15
- Assignees: Fukoku Co., Ltd.
- Inventors: Mitsuo Kuzukawa; Tatsuo Tanaka
- Web page: https://patentgrep.com/patent/US5707048A

## CPC

- F16F 13/08: the plastics spring forming at least a part of the wall of the fluid chamber of the damper (F16F13/20 - F16F13/24 take precedence)
- B60G 2202/14: Plastic spring, e.g. rubber
- B60G 2202/24: Fluid damper
- F16F: SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- B60G: VEHICLE SUSPENSION ARRANGEMENTS (air-cushion vehicles B60V; {cycle suspensions B62K25/00})

## Abstract

A fluid-filled mount using an elastic body and a viscous fluid to obtain a great damping force has for its object to facilitate the filling of the viscous fluid and to considerably improve the sealability, and comprises a case having a mounting plate with mounting holes and fixing claws together with a cup, a cylindrical case having a mounting plate with mounting holes together with a cylinder, a stud having an axial through hole for viscous fluid filling and also having a tapped hole provided in one end of its axial through hole and a damping plate fixed to its other end, and an elastic body having the said cylindrical case embedded in it and the said stud secured in its center hole.

## Claims

### Claim 1

A fluid-filled mount having a case (13) having a mounting plate (13D) with mounting holes (13B) and fixing claws (13C), and also having a cup (13A) containing a high viscous fluid (4), and the case (13) receiving vibrations from outside;
a cylindrical case (16) having a mounting plate (16) with mounting holes (16B) and also having a cylinder (16A);
a stud (14) having an axial through hole (14A) for filling of said high viscous fluid (4), and also having a tapped hole (4B) provided in one end of said axial through hole (14A) and a damping plate (15) fixed to another end of stud (14);
an elastic body (17) having the said cylindrical case (16) embedded in the elastic body (17) and the stud (14) secured in a center hole in said elastic body (17), and said elastic body (17) having a tapered outside surface; and
said high viscous fluid (4) filled in said cup (13A) of the case (13); further characterized in that said elastic body (17) integrated with said stud (14) having said damping plate (15) fixed to an end of stud (14) and said cylindrical case (16) is locked in the cup (13) of the case (13), and fixing claws (13C) of said mounting plate (13D) of said case (13) are bent onto the mounting plate (16C) of said cylindrical case (16) to fix these cases together, and said high viscous fluid (4) is filled into said cup (13A) of said case (13) through said axial through hole (14A) of said stud (14) so that said damping plate (15) is provided in said high viscous fluid (4), and said mounting holes (13B) in said mounting plate (13D) of said case (13) are in register with said mounting holes (16B) in said mounting plate (16C) of said cylindrical case (16) so that mount can be fitted to the bracket (3) by inserting bolts (128) through said mounting holes (13B) and (16B);
characterized in that a top surface area of said damping plate (15) is larger than a bottom surface area of damping plate (15) whereby the pressure of said high viscous fluid (4) is equalized when vibrating.

### Claim 2

A fluid-filled mount having a case (13) having a mounting plate (13D) with mounting holes (13B) and fixing claws (13C), and also having a cup (13A) containing a high viscous fluid (4), and the case (13) receives vibrations from outside, a cylindrical case (16) having a mounting plate (16C) with mounting holes (16B) and also having a cylinder (16A); a stud (14) having an axial through hole (14A) for filling of said high viscous fluid (4) and also having a tapped hole (14B) provided in one end of axial through hole (14A) in said stud (14) and a damping plate (15) fixed to another end of said stud (14); an elastic body (17) having said cylindrical case (16) embedded in said elastic body (17) and the stud (14) secured in a center hole in said elastic body (17), said elastic body (17) also having a tapered outside surface; and
said high viscous fluid (4) filled in said cup (13A) of the case (13);
further characterized in that said elastic body (17) is integrated with said stud (14) having said damping plate (15) fixed to an end of said stud (14); said elastic body (17) also integrated with said cylindrical case (16) such that said elastic body (17) is locked in the cup (13A) of the case (13), and that the fixing claws (13C) of said mounting plate (13D) of said case (13) are bent onto the mounting plate (16C) of said cylindrical case (16) to fix these cases together, and that said high viscous fluid (4) is filled into said cup (13A) of said case (13) through said axial through hole (14A) of said stud (14) so that said damping plate (15) is provided in said high viscous fluid (4), and that said mounting holes (13B) in said mounting plate (13D) of said case (13) are in register with said mounting holes (16B) in said mounting plate (16C) of said cylindrical case (16) so that mount can be fitted to the bracket (3) by inserting bolts (128) through said mounting holes (13B) and (16B):
characterized in that said damping plate (15) has a plurality of openings (15B); and also has valves (20B) which are made of spring material which usually shut said opening (15B) and open said opening (15B) when high impact is received, thereby preventing abrupt rising of the pressure of said high viscous fluid (4).