# US 5,352,950 A · Vibration wave driven motor

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- Number: US 5,352,950 A
- Document ID: US5352950A
- Status: Granted
- Kind: A
- Application number: 07/996,862
- Filed: 1992-12-28
- Granted: 1994-10-04
- Earliest claimed: 1990-03-30
- Assignees: Canon Kabushiki Kaisha
- Inventors: Takayuki Shirasaki
- Web page: https://patentgrep.com/patent/US5352950A

## CPC

- H02N 2/163: {Motors with ring stator}
- H02N 2/007: {Materials}
- H02N: ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR

## Abstract

A vibration wave motor, in which the slidable member, constituting the rotor either solely or in combination with a support member, is formed by injection molding of a composite resin, composed of a thermoplastic resin with the glass transition point at least equal to 100.degree. C., preferably at least equal to 140.degree. C., as the matrix resin and a fibrous reinforcing material.

## Claims

### Claim 1

A vibration wave motor comprising:
a vibration member for generating a vibration wave by an applied electric signal; and
a contacting member having a sliding portion which contacts said vibration member and is adapted to receive the vibration wave generated in said vibration member;
wherein said sliding portion is composed of a thermoplastic resin with a glass transition point at least equal to 100.degree. C., containing non-fibrous reinforcing material and formed by injection molding, and wherein said non-fibrous reinforcing material is composed of glass-like carbon beads.

### Claim 2 (depends on 1)

A vibration wave motor according to claim 1, wherein the average diameter of the beads is 10 .mu.m.

### Claim 3

A vibration wave motor comprising:
a vibration member for generating a vibration wave by an applied electrical signal; and
a contacting member having a sliding portion which contacts said vibration member and is adapted to receive the vibration wave generated in said vibration member;
wherein said sliding portion is composed of a thermoplastic resin with a glass transition point greater than or equal to 100.degree. C., containing non-fibrous reinforcing material and formed by injection molding, and wherein said non-fibrous reinforcing material is composed of glass-like carbon beads.

### Claim 4 (depends on 3)

A vibration wave motor according to claim 3, wherein the average diameter of the beads is 10 .mu.m.

### Claim 5 (depends on 3)

A vibration wave motor according to claim 3, wherein the vibration member is composed of stainless steel.

### Claim 6 (depends on 3)

A vibration wave motor according to claim 3, wherein the vibration member is composed of martensite stainless steel.

### Claim 7 (depends on 3)

A vibration wave motor according to claim 3, wherein said resin is composed of liquid crystalline resin.