Rotor of a rotary cylinder

Abstract

A rotor for a rotary cylinder includes a body having a tube and a plate which has the first end integrally formed to the tube, and the second end of the plate extends radially relative to the tube. The plate is a solid plate and has a curved outer periphery. A first recessed area is defined in each of the top and the bottom of the plate. A waist is formed to the plate and located between the first and second ends of the plate. A resilient coat is coated to the body and includes a Y-shaped seal portion along the curved outer periphery of the plate so as to be movably in contact with the inside of the cylinder.

Claims

1. A rotor for a rotary cylinder, comprising: a body having a tube and a plate which has a first end integrally formed to the tube, a second end of the plate extending radially relative to the tube, the plate being a solid plate and having a curved outer periphery, a first recessed area defined in each of a top and a bottom of the plate, a waist formed to the plate and located between the first and second ends of the plate, and two protrusions extending from each of the two first recessed areas; and a resilient coat coated to the body and including a Y-shaped seal portion along the curved outer periphery of the plate.

2. The rotor as claimed in claim 1, wherein a length of each of the protrusions is substantially the same as an outer diameter of the tube.

3. The rotor as claimed in claim 1, wherein two second recessed areas are defined in each of the first recessed areas, each of the second recessed areas has one of the protrusions extending therefrom, an area of each of the second recessed areas is larger than a cross sectional area of the protrusion corresponding thereto.

4. The rotor as claimed in claim 1, wherein a rib extending from one of the two first recessed areas.

5. The rotor as claimed in claim 1, wherein a keyway is defined axially in an inside of the tube.

6. The rotor as claimed in claim 1, wherein the tube has two slots defined therein.

7. A rotor for a rotary cylinder, comprising: a body having a tube and a plate which has a first end integrally formed to the tube, a second end of the plate extending radially relative to the tube, the plate being a solid plate and having a curved outer periphery, a first recessed area defined in each of a top and a bottom of the plate, a waist formed to the plate and located between the first and second ends of the plate; and a resilient coat coated to the body and including a Y-shaped seal portion along the curved outer periphery of the plate, the seal portion including two lips and a connection portion which is connected between the two lips, each lip having a narrow top and a wide root portion, each lip having a tapered face which faces the first recessed area corresponding thereto.

8. The rotor as claimed in claim 7, wherein a ratio between a thickness of the body and an outer diameter of the tube of the rotary is between to .

9. A rotor for a rotary cylinder, comprising: a body having a tube and a plate which has a first end integrally formed to the tube, a second end of the plate extending radially relative to the tube, the plate being a solid plate and having a curved outer periphery, a first recessed area defined in each of a top and a bottom of the plate, a waist formed to the plate and located between the first and second ends of the plate; and a resilient coat coated to the body and including a Y-shaped seal portion along the curved outer periphery of the plate, a thickness of the resilient coat being between 0.5 mm to 5 mm.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a perspective view to show the rotor of the present invention;

(2) FIG. 2 is a perspective view to show the body of the rotor of the present invention;

(3) FIG. 3 is a top view to illustrate that the resilient coat is coated to the body of the rotor of the present invention;

(4) FIG. 4 is a top view of the rotor of the present invention;

(5) FIG. 5 is a cross sectional view, taken along line B-B in FIG. 4;

(6) FIG. 6 is a partial cross sectional view to show that the lips of the seal portion of the rotor of the present invention contact the inside of the cylinder;

(7) FIG. 7 shows that the lips of the seal portion of the conventional rotor contact the inside of the cylinder;

(8) FIG. 8 is a perspective view to show the conventional rotor with two lips, and

(9) FIG. 9 shows that the conventional rotor includes a hollow body and a side panel is to be connected to the open side of the hollow body.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

(10) Referring to FIGS. 1 to 4, the rotor A for a rotary cylinder of the present invention comprises a body 1 having a tube 11 and a plate 12 which has a first end integrally formed to the tube 11, and a second end of the plate 12 extends radially relative to the tube 11. The plate 12 is a solid plate and has a curved outer periphery 13. A first recessed area 14 is defined in each of the top and the bottom of the plate 12. A waist 15 having a narrower width compared with the second end of the plate 12 is formed to the plate 12 and located between the first and second ends of the plate 12. Two protrusions 16 extend from each of the two first recessed areas 14. The length L between two respective top face of the two protrusions 16 of the top and the bottom of the plate 12 is substantially the same as the outer diameter d of the tube 11 as shown in FIG. 5. Two second recessed areas 17 are defined in each of the first recessed areas 14, and each of the second recessed areas 17 has one of the protrusions 16 extending therefrom. The area of each of the second recessed areas 17 is larger than the cross sectional area of the protrusion 16 corresponding thereto. A rib 18 extends from one of the two first recessed areas 14.

(11) A keyway 111 is defined axially in the inside of the tube 11 and located corresponding to the first end of the plate 12. The tube 11 has two slots 112 defined therein. The ratio between the thickness T of the body 1 and an outer diameter d of the tube 11 of the rotary A is between to .

(12) A resilient coat 2, as shown in FIGS. 4 and 5, is coated to the body 1 and includes a Y-shaped seal portion 21 along the curved outer periphery 13 of the plate 12. The seal portion 21 includes two lips 211 and a connection portion 212 which is connected between the two lips 211. The connection portion 212 is a ridge as shown in FIG. 5, so that the two lips 211 and the connection portion 212 form a W-like shape as disclosed in FIG. 5. Each lip 211 has a narrow top and a wide root portion. Each lip 211 has a tapered face 213 which faces the first recessed area 14 corresponding thereto. The thickness t of the resilient coat 2 is between 0.5 mm to 5 mm.

(13) As shown in FIGS. 5 and 6, the rotor A is a single piece and the resilient coat 2 is easily coated to the rotor A by using a mold set. The lip portion 21 of the rotor A has two lips 211 which snugly and rotatably contact the inside 3 of the cylinder when the rotor A is rotated within the cylinder by pressure. The direction of the rotation of the rotor A is controlled by using an electro-magnetic valve or the like.

(14) The ridge like connection portion 212 reinforces the durability of the seal portion 21. When pressure a is applied to the tapered faces 213 of the two lips 211, the pressure a assists the seal portion 21 to snugly contact the inside 3 of the cylinder.

(15) While we have shown and described the embodiment in accordance with the present invention, it should be clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.