US3724607A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic slack adjusting device for a brake lever
Assignee: Westinghouse Bremsen und Apparatebau GmbH
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Filing: 1971-02-22
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Granted: 1973-04-03
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Expires: 1991-02-22
Abstract
Abstract This invention relates to an automatic slack adjuster arrangement for the brake lever of the brake cam shaft of the brake, especially for street vehicles, with the worm wheel arranged on the brake cam shaft and in engagement with the worm that is positioned on the worm shaft that is rotatably mounted in the brake lever which, as soon as wear of the brake shoe occurs, rocks through an angle that exceeds the permissible value. This additional rocking of the brake lever adjusts the position of the brake lever in the manner hereinafter explained.
Inventors
- 👤 E Reinecke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:41
CPC Classifications
F; F16; F16D; F16D65/00; F16D65/38; F16D65/40; F16D65/52; F16D65/60
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
166 words
In an automatic slack adjusTer mechanism for a brake lever that is connected to a brake shoe cam shaft by a worm wheel carried on the cam shaft and a worm mounted on a worm shaft journaled in the lever, a stop member, a slack adjuster lever having limited movement with respect to said stop member, and an overrunning clutch releasably locking said slack adjuster lever to said worm shaft comprising a ring member concentric to said worm shaft and a plurality of locking members interposed between said ring member and said worm shaft operable to lock said ring member to said worm shaft upon rotation of said ring member in only one direction, wherein the improvement comprises: a. a collar formed integral with said ring member, and b. a first manually operable screw-threaded means for releasably securing said slack adjuster lever to said collar whereby said lever is rotatable relative to said collar when released therefrom to move said lever relative to said stop member.
Claim 2
Dependent Claim
166 words
In an automatic slack adjusTer mechanism for a brake lever that is connected to a brake shoe cam shaft by a worm wheel carried on the cam shaft and a worm mounted on a worm shaft journaled in the lever, a stop member, a slack adjuster lever having limited movement with respect to said stop member, and an overrunning clutch releasably locking said slack adjuster lever to said worm shaft comprising a ring member concentric to said worm shaft and a plurality of locking members interposed between said ring member and said worm shaft operable to lock said ring member to said worm shaft upon rotation of said ring member in only one direction, wherein the improvement comprises: a. a collar formed integral with said ring member, and b. a first manually operable screw-threaded means for releasably securing said slack adjuster lever to said collar whereby said lever is rotatable relative to said collar when released therefrom to move said lever relative to said stop member.
Claim 3
Dependent Claim
55 words
An automatic slack adjuster mechanism, as recited in claim 1, further characterized in that said slack adjuster lever comprises two parts, each of which is rotatable with respect to said ring member when released therefrom by said manually operable screw-threaded means, and rotatable simultaneously with said ring member when secured thereto by said screw-threaded means.
Claim 4
Dependent Claim
108 words
An automatic slack adjuster mechanism, as recited in claim 2, further characterized in that said stop member and each of said parts of said slack adjuster lever is provided with a pair of contact surfaces, each of said surfaces on said lever parts movable into contact with one of said contact surfaces formed on said stop member, and by a second manually operable screw-threaded means for securing said two parts of said slack adjuster lever together while each is released from said collar by said first manually operable screw-threaded means to enable simultaneous rotation of said two parts of said slack adjuster lever relative to said ring member.
Claim 5
Dependent Claim
110 words
An automatic slack adjuster mechanism, as recited in claim 3, further characterized in that one of said slack adjuster lever parts is provided with a pair of parallel spaced-apart arcuate slots and the other is provided with a pair of screw-threaded bores, each in alignment with one of said slots, and that said first manually operable screw-threaded means passes through one of said slots and has screw-threaded engagement with that one of said screw-threaded bores that is in alignment therewith, and said second manually operable screw-threaded means passes through the other of said slots and has screw-threaded engagement with that one of said screw-threaded bores that is in alignment therewith.
Claim 6
Dependent Claim
63 words
An automatic slack adjuster mechanism, as recited in claim 4, further characterized in that each of said slack adjuster lever parts comprises an annular member disposed about said ring member, said annular members being disposed on the respective opposite sides of said collar and each having integral therewith and extending from one side thereof an annular flange that overlies and abuts said collar.
Claim 7
Dependent Claim
114 words
An automatic slack adjuster mechanism, as recited in claim 5, further characterized in that one of said slack adjuster lever parts has formed integral therewith an arm, the outer end of which is provided with a recess having a pair of parallel spaced-apart walls each of which constitute a contact surface movable into contact with said stop member to thereafter respectively cause operation of said overrunning clutch to release said slack adjuster lever from said worm shaft upon rocking of said brake lever in one direction through more than a chosen angle and to lock said slack adjuster lever to said worm shaft upon subsequent rocking of said brake lever in an opposite direction.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |