Patent US3580345A successfully refreshed from Google Patents.
US3580345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disc brake for track-driven machine
Assignee: AMERICAN CRANE Corp A CORP OF
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Filing: 1969-06-11
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Granted: 1971-05-25
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Expires: 1989-06-11
Abstract
Abstract A crane equipped with a crawler travel assembly having a pair of endless tracks trained about drive tumblers and idler tumblers. Separate self-contained disc brake units are drivably connected to the axles attached to the idler tumblers. The brake units have torque arms anchoring the units to the track frame.
Inventors
- 👤 Archer W Brown
- 👤 James L Montgomery
- 👤 Walter A Beer
- 👤 Thomas J Mero
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:50
CPC Classifications
F; F16; F16D; F16D55/00; F16D55/24; F16D55/26; F16D55/36; F16D55/40; B; B60; B60T; B60T1/00; B60T1/02; B60T1/06; B60T1/062; B62; B62D; B62D55/00; B62D55/08; B62D55/12; B62D55/125; F16D2055/0004; F16D2055/0058
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
98 words
In a track-driven machine having a track frame, a drive tumbler rotatably mounted on one end of the track frame and an idler tumbler mounted on a transverse rotatable axle at the opposite end of the track frame, an endless track trained about drive tumbler and the idler tumbler, the improvements of: a disc brake meaNs having a movable member mounted on and drivably secured to the said transverse axle, stator means operable to brake the movable member, torque arm means operably secured to the stator means, and means for mounting the torque arm on the track frame.
Claim 2
Dependent Claim
98 words
In a track-driven machine having a track frame, a drive tumbler rotatably mounted on one end of the track frame and an idler tumbler mounted on a transverse rotatable axle at the opposite end of the track frame, an endless track trained about drive tumbler and the idler tumbler, the improvements of: a disc brake meaNs having a movable member mounted on and drivably secured to the said transverse axle, stator means operable to brake the movable member, torque arm means operably secured to the stator means, and means for mounting the torque arm on the track frame.
Claim 3
Dependent Claim
70 words
The structure of claim 1 wherein: the movable member comprises a spur gear mounted on the axle and a plurality of discs carried on the spur gear, said stator means comprising a housing surrounding said movable discs and nonrotatable discs carried by said housing, said nonrotatable discs being located between adjacent rotatable discs, said brake assembly including an actuator means for selectively engaging and disengaging said rotatable and nonrotatable discs.
Claim 4
Dependent Claim
52 words
The structure of claim 2 wherein: said actuator means comprises an actuator member, biasing means for moving the actuator member toward the said discs and fluid motor means for moving the actuator member away from said discs whereby upon release of pressure in said fluid motor said biasing means applies the brake.
Claim 5
Dependent Claim
47 words
The structure of claim 2 wherein: said torque arm means is secured to and extended radially outwardly from the housing, and said mounting means located adjacent the outer end portion of the torque arm means and including means attaching the torque arm means to the mounting means.
Claim 6
Dependent Claim
44 words
The structure of claim 1 including: a bearing block rotatably supporting said axle movably mounted on the track frame, said brake means including a backplate secured to the bearing block whereby said backplate and torque arm anchor the stator means on the track frame.
Claim 7
Dependent Claim
63 words
The structure of claim 1 wherein: the stator means includes a housing, said torque arm means being secured to and extended rearwardly from said housing, said mount means comprising an upper anchor member and a lower anchor member located adjacent the upper and lower sides of the torque arm means and fastening means for securing the torque arm means to said anchor plates.
Claim 8
Dependent Claim
34 words
The structure of claim 6 wherein: said torque arm means and anchor members include longitudinally adjusting structure so that the idler tumbler can be adjusted relative to the track frame to adjust the track.
Claim 9
Dependent Claim
33 words
The structure of claim 6 wherein: said torque arm means has a longitudinal slot accommodating the fastening means whereby the idler tumbler can be adjusted relative to the frame to adjust the track.
Claim 10
Dependent Claim
32 words
The structure of claim 1 wherein: the brake means includes springs cooperating with a brake fluid motor to brake the movable member on reduction of fluid pressure in the brake fluid motor.
Claim 11
Dependent Claim
59 words
The structure of claim 1 wherein: the stator means includes a housing, said torque arm means being secured to and extended outwardly from the housing to increase the length of the brake anchor structure, said mounting means located adjacent the outer end portion of the torque arm means and including means attaching the torque arm to the mounting means.
Claim 12
Dependent Claim
37 words
The structure of claim 10 wherein: said torque arm means and mounting means have coacting longitudinally adjusting structure whereby the idler tumbler can be adjusted relative to the track frame to adjust the tension of the track.
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) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |