# US 2021/0277919 A1 · Linear actuator

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2021/0277919 A1
- Document ID: US20210277919A1
- Status: Published application
- Kind: A1
- Application number: 17/179,616
- Filed: 2021-02-19
- Published: 2021-09-09
- Earliest claimed: 2020-03-03
- Assignees: SMC Corporation
- Applicants: Smc Corporation
- Inventors: Yoshihiro TOSHIMORI; Toshio SATO; Atsumi TSUKADA
- Web page: https://patentgrep.com/patent/US20210277919A1

## CPC

- F15B 15/1404: {in clusters, e.g. multiple cylinders in one block}
- F15B 15/20: Other details {, e.g. assembly with regulating devices}
- F15B 15/1471: {Guiding means other than in the end cap (F15B15/1466 takes precedence)}
- F15B 21/00: Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B: SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR

## Abstract

In a linear actuator, a slide table is attached to a cylinder body via a guide mechanism so as to be movable along the longitudinal direction of the cylinder body. The slide table includes a table body arranged above the cylinder body and extending in the longitudinal direction, and an end plate joined to an end of the table body in the longitudinal direction so as to be substantially orthogonal to the table body. The end plate includes a storage chamber provided on one surface thereof in the longitudinal direction facing a guide mechanism and depressed from the one surface in a direction away from the guide mechanism. For example, when the linear actuator is used in an environment where powder dust and the like is scattered, the storage chamber stores therein a solidified matter made up of the powder dust and the like.

## Claims

### Claim 1

A linear actuator, comprising:
a cylinder body containing therein a cylinder chamber to which a pressure fluid is supplied;
a slide table configured to be movable along a longitudinal direction of the cylinder body;
a cylinder mechanism having a piston arranged in the cylinder chamber and configured to be movable along the cylinder chamber; and
a guide mechanism attached to the cylinder body and configured to guide the slide table along the longitudinal direction of the cylinder body under rolling action of a plurality of rolling elements circulating a passage, the linear actuator being configured to reciprocate the slide table relative to the cylinder body under moving action of the piston, wherein:
the slide table includes a main body extending in the longitudinal direction of the cylinder body, and an end part arranged substantially orthogonal to the main body so as to face an end portion of the cylinder body in the longitudinal direction; and
the end part is configured to have a storage portion that is opened on an end surface, of the end part, that faces the cylinder body, the storage portion extending in the longitudinal direction, the storage portion being configured to store dust and dirt therein.

### Claim 2 (depends on 1)

The linear actuator according to claim 1, wherein the storage portion is formed at a position facing the guide mechanism when viewed from the longitudinal direction.

### Claim 3 (depends on 1)

The linear actuator according to claim 1, wherein the storage portion is formed so as to penetrate through the end part in the longitudinal direction.

### Claim 4 (depends on 1)

The linear actuator according to claim 1, wherein the storage portion is formed so as not to penetrate through the end part in the longitudinal direction.

### Claim 5 (depends on 3)

The linear actuator according to claim 3, wherein the end part has a work hole extending in a direction substantially orthogonal to an extending direction of the storage portion, the work hole being configured to establish communication between the storage portion and outside.

### Claim 6 (depends on 4)

The linear actuator according to claim 4, wherein the end part has a work hole extending in a direction substantially orthogonal to an extending direction of the storage portion, the work hole being configured to establish communication between the storage portion and outside.

### Claim 7 (depends on 3)

The linear actuator according to claim 3, further comprising a cover member configured to cover an opening of the storage portion, the cover member being detachably attached to the end part.