US1875007A - Brake - Google Patents

Description

Aug. 30, 1932. HUNT 1,875,007

BRAKE Filed Feb. 28, 1929 1 M M I u 1 JNVENTOR. G EORGE H. HUNT B ATTORNEY Patented Aug. 30, 1932 UNITED STATES PATENT OFFICE GEORGE E. HUNT, OF SOUTH BEND, INDIANA, ASSIGNOB TO BENDIX BRAKE COMPANY, OI SOUTH BEND, INDIANA, A CORPORATION OF ILLINOIS BRAKE Applicationfiled February 28, 1929. Serial No. 848,519.

This invention relates to brakes, and is illustrated as embodied in an internal expanding brake for an automobile. An object of the invention is to provide a compact brake,

preferably of a non-servo type, which is effective in retarding both forward and reverse motion.

In one desirable arrangement there are several (preferably three) shoes arranged end to end, and I prefer that the shoes be linked or otherwise operatively connected individually to a common applying device, shown as arranged between the ends of two of the shoes. This permits the shoes to be anchored inus dividually, so that there is no compounding or servo action of one shoe on another. The shoes may overlap each other, and two of them may be cross-anchored,i. e. the anchor of each may be between the ends of !0 the other.

The above and other objects and features of the invention, including various novel and desirable details, will be apparent from the following description of one illustrative embodiment shown in the accompanying drawing, in which:

I Figure 1 is a vertical section through the brake, just inside the head of the brake drum and showing the brake shoes in side eleva- :0 tion;

Figure 2 is a partial section on the line 2-2 of Figure 1, showing the cross-anchored ends of two of the-shoes; and

- Figure 3 is a partial section through the 5 novel applying means, on the line 3-3 of Figure 1.

The illustrated brake includes a rotatable drum 10, at the 0 en side of which is a support such as a bac ing plate 12. Within the drum there are arranged end to end three brake shoes 14, 16, and 18,, individually anchored on three pivots 20, 22, and 24 carried by the backing plate. The unanchored end of shoe 16 overlaps the anchored end of shoe 14, to avoid leaving any considerable ga between the shoes.

hoes 16 and 18 are cross-anchored, the

anchor 22 of shoe 18 being between the ends of shoe 16, and the anchor 24 of shoe 16 being between the ends of shoe 18. Shoe 16 is acting thereon and also having an operating shown with two spaced parallel stiffening webs extended at the right end of the shoe to form a pair of anchor arms straddling the end of shoe 18 and pivotally mounted on the anchor 24. Shoes 14 and 16 are most effective in retarding forward movement of the automobile, when the drum is turning counterclockwise, shoe 18 being most effective in retarding reverse movement of the automobile, when the drum is turning clockwise.

The brake is applied by novel means shown as including a s aft 28 journaled in a bearing 30 secured to the backing plate, and having fixed at its end a fitting 32 formed with three lever arms individually connected to the respective shoes by means such as links 34, 36 and 38. The applying means acts against the resistance of a return spring 40, shown tensioned between link 36 and the backing plate.

While one illustrative embodiment has been described in detail, it is not my intention to limit the scope of the invention to that particular embodiment, or otherwise than by the terms of the appended claims.

I claim:

1. A brake comprising at least three individually anchored shoes, two of which are cross-anchored, and a single applying device acting simultaneously on the three shoes.

2. A brake comprising at least three individually anchored shoes, two of which are cross-anchored, together with applying means adjacent the ends of two of the shoes and connection acting on the third shoe.

3. A brake comprising at least three individually anchored shoes, two of which are cross-anchored, and the third of which overlaps the unanchored end of one of the crossanchored shoes and an applying device for the three shoes acting on the unanchored ends of said cross-anchored shoesand on the third shoe.

4. A brake comprising at least three individually anchored shoes, two of which are cross-anchored, and the third of which overlaps at its anchored end the unanchored end of one of the cross-anchored shoes and a sin- :00

gle applying device acting on the unanchored ends of all three shoes.

5. -A brake comprising three anchored shoes, the anchored ends of two of the shoes being adjacent, together with applying means adjacent the unanchored ends of two of the shoes and acting individually on the three shoes.

6. A brake comprising three anchored shoes, the anchored ends of two of the shoes being adjacent, together with appliing means linked individually to the three s oes.

7 A brake comprising three shoes arranged end to end, and an applying device arranged between and acting on the adjacent ends of two of the shoes and operatively connected directly to the third shoe.

8. A brake comprising three shoes arranged end to end, and an applying device arranged between and acting on the adjacent ends of two of the shoes and linked directly to the third shoe.

9. A brake comprising three shoes arranged end to end, a shaft between the ad- 25 jacent ends of two of the shoes and provided with three arms, and a link connectmg each arm to a different one of the shoes.

10, A brake comprising three individuall anchored shoes arranged end to end, a sha between the adjacent unanchored ends of two of the shoes and provided with three arms, and a link connecting each arm to a different one of the shoes.

In testimony whereof, I have hereunto 3B signed my name.

GEORGE H. HUNT.

Images