US1705737A - Brake - Google Patents

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Publication number
US1705737A
US1705737A US47666A US4766625A US1705737A US 1705737 A US1705737 A US 1705737A US 47666 A US47666 A US 47666A US 4766625 A US4766625 A US 4766625A US 1705737 A US1705737 A US 1705737A
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US
United States
Prior art keywords
brake
drum
shoes
shoe
pair
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US47666A
Inventor
Roy S Sanford
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bendix Brake Co
Original Assignee
Bendix Brake Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bendix Brake Co filed Critical Bendix Brake Co
Priority to US47666A priority Critical patent/US1705737A/en
Application granted granted Critical
Publication of US1705737A publication Critical patent/US1705737A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D51/00—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like
    • F16D51/46—Self-tightening brakes with pivoted brake shoes, i.e. the braked member increases the braking action
    • F16D51/54—Self-tightening brakes with pivoted brake shoes, i.e. the braked member increases the braking action with three or more brake-shoes, at least two of them being linked or directly interacting
    • F16D51/56—Self-tightening brakes with pivoted brake shoes, i.e. the braked member increases the braking action with three or more brake-shoes, at least two of them being linked or directly interacting mechanically actuated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2125/00—Components of actuators
    • F16D2125/18—Mechanical mechanisms
    • F16D2125/20—Mechanical mechanisms converting rotation to linear movement or vice versa
    • F16D2125/22—Mechanical mechanisms converting rotation to linear movement or vice versa acting transversely to the axis of rotation
    • F16D2125/28—Cams; Levers with cams
    • F16D2125/30—Cams; Levers with cams acting on two or more cam followers, e.g. S-cams

Definitions

  • This invention relates to brakes, and is illustrated as embodied in an internal expanding automobile brake.
  • An objectof the invention is to provide a brake having a pair of shoes connected at opposite ends of a central shoe, and which is of the duo-servo or double-wrapping type, by providing novel anchoring means taking the torque of all three shoes from one end shoe when the drum is turning in one direction and from the other end shoe when the drum is turning 1n the op: posite direction.
  • the figure is a vertical section through the brake just inside the Wheel, showing the shoes in side elevation.
  • the shoes are substantially inclosed by the drum 10 and the backing plate 12.
  • a symmetrical central shoe 14 has pivoted thereto at 16 and 18, some distance from its ends, a pair of end shoes 20 and 22, each of which is forked at its ends to form a 'pair of arms straddling the end of shoe 14, so that shoe 14 overhangs both connections. tially as more fully described in Patent No. 1,640,589, granted Bendix Brake Company on Aug. 30, 1927.
  • Shoes 20 and 22 are forced apart to apply the brake, against the,resistance of a return spring 24, by an expanding device such as a floating double cam 26.
  • the cam may be arranged substantially as more fully described in Patent No. 1,642,844, granted Bendix Brake Company on September 20, 1927
  • Auxiliary springs 28 act on the connected ends of shoe 14 to urge the shoe against one or more eccentric adjustable stops 30.
  • the torque is taken for all three shoes from either by a pair of links 32 or by apair of links 34.
  • the links are inclined in opposite directions to cross each other, and have slots 36 embracing the anchor pins 38, so that the idle pair of links may have the, necessary lost motion.
  • a brake comprising, in combination, a drum, a floating friction device within the drum including pivotally-connected shoes, a stop engaging the. central shoe approximately at its center when the brake is released, and a pair of springs connected to opposite ends of said central shoe and urging ittoward said stop.
  • a brake comprising, in combination, a drum, a floating friction device within the drum including pivotally-connected shoes, 0. normally-stationary but adjustable device within the drum serving as a stop engaging the central shoe approximately at its center when the brake is released, and a pair of springs connected to opposite ends of said central shoe and urging it toward said stop.
  • a brake comprising, in combinatioma drum, a floating friction device Within the drum having adjacent ends, a linkconnected of the drum and inclined to terminate at a point just inside the otherv of said ends, the two links crossing each other, and a stationary anchor-part engaging the inner end of each link, the connection at one end of each link including a slot permitting said end of the friction device to move away from its anchor part.

Description

March 119 1929. 's SANFORD 3,705,737
BRAKE Filed Aug. 5, 1925 INVENTOR RoY 5. SANFORD ATTORNEY Patented Mar. 19, 1929.
UNITED STATES PATENT, OFFICE.
noY s. sANroRn, or SOUTH BEND, INDIANA, ASSIGNOR To BENDIX' BRAKE COMPANY,
' or CHICAGO, ILLINOIS, A CORPORATION or ILLINOIS.
BRAKE.
Application filed August 3,1925. Serial No. 47,666.
This invention relates to brakes, and is illustrated as embodied in an internal expanding automobile brake. An objectof the invention is to provide a brake having a pair of shoes connected at opposite ends of a central shoe, and which is of the duo-servo or double-wrapping type, by providing novel anchoring means taking the torque of all three shoes from one end shoe when the drum is turning in one direction and from the other end shoe when the drum is turning 1n the op: posite direction. The various features of novelty will be apparent from the following description of one illustrative embodiment shown in the accompanying drawing, in which:
The figure is a vertical section through the brake just inside the Wheel, showing the shoes in side elevation.
In this particular embodiment, the shoes are substantially inclosed by the drum 10 and the backing plate 12. A symmetrical central shoe 14 has pivoted thereto at 16 and 18, some distance from its ends, a pair of end shoes 20 and 22, each of which is forked at its ends to form a 'pair of arms straddling the end of shoe 14, so that shoe 14 overhangs both connections. tially as more fully described in Patent No. 1,640,589, granted Bendix Brake Company on Aug. 30, 1927.
Shoes 20 and 22 are forced apart to apply the brake, against the,resistance of a return spring 24, by an expanding device such as a floating double cam 26. The cam may be arranged substantially as more fully described in Patent No. 1,642,844, granted Bendix Brake Company on September 20, 1927 Auxiliary springs 28 act on the connected ends of shoe 14 to urge the shoe against one or more eccentric adjustable stops 30.
I one or the other of the shoes 20 or 22, a'cco'rding to the direction of rotation of drum 10,
. The torque is taken for all three shoes from either by a pair of links 32 or by apair of links 34. The links are inclined in opposite directions to cross each other, and have slots 36 embracing the anchor pins 38, so that the idle pair of links may have the, necessary lost motion.
This construction may besubstan- 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, in combination, a drum, a floating friction device within the drum including pivotally-connected shoes, a stop engaging the. central shoe approximately at its center when the brake is released, and a pair of springs connected to opposite ends of said central shoe and urging ittoward said stop.
2. A brake comprising, in combination, a drum, a floating friction device within the drum including pivotally-connected shoes, 0. normally-stationary but adjustable device within the drum serving as a stop engaging the central shoe approximately at its center when the brake is released, and a pair of springs connected to opposite ends of said central shoe and urging it toward said stop.
3, A brake comprising, in combinatioma drum, a floating friction device Within the drum having adjacent ends, a linkconnected of the drum and inclined to terminate at a point just inside the otherv of said ends, the two links crossing each other, and a stationary anchor-part engaging the inner end of each link, the connection at one end of each link including a slot permitting said end of the friction device to move away from its anchor part.
In testimony whereof I have hereunto signed my name.
ROY SANFORD.
US47666A 1925-08-03 1925-08-03 Brake Expired - Lifetime US1705737A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US47666A US1705737A (en) 1925-08-03 1925-08-03 Brake

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Application Number Priority Date Filing Date Title
US47666A US1705737A (en) 1925-08-03 1925-08-03 Brake

Publications (1)

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US1705737A true US1705737A (en) 1929-03-19

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050023087A1 (en) * 2003-07-31 2005-02-03 Byeong-Wook Kang Drum brake system for vehicle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050023087A1 (en) * 2003-07-31 2005-02-03 Byeong-Wook Kang Drum brake system for vehicle
US6942074B2 (en) * 2003-07-31 2005-09-13 Kia Motors Corporation Drum brake system for vehicle

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