US3680667A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Braking apparatus
Assignee: Individual
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Filing: 1971-03-15
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Granted: 1972-08-01
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Expires: 1991-03-15
Abstract
Abstract Braking apparatus for use on a railway car including an air cylinder, a piston push rod carried by the air cylinder, a live lever pivotally connected to the piston push rod, first linkage means connected to the live lever and a first pair of brake shoes connected to the linkage means, a slack adjuster connected to the live lever, a center rod actuatable by the live lever, a dead fulcrum lever connected to the center rod, second linkage means connected to the dead fulcrum lever and a second pair of brake shoes connected to the second linkage means, a control rod actuatable by the live lever and an overtravel compensating device mounted on the control rod which is engaged by activating means extending from the slack adjuster.
Inventors
- 👤 Robert L Ludington
- 👤 Robert M Holloway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:06
CPC Classifications
B; B61; B61H; B61H15/00; B61H15/0007; B61H15/0014; B61H15/0028; B61H13/00; B61H13/20
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
120 words
Braking apparatus comprising an air cylinder, a piston push rod carried by said air cylinder, a live lever pivotally connected to said piston push rod, first linkage means connected to said live lever, a first pair of brake shoes connected to said linkage means, a slack adjuster connected to said live lever, a center rod actuatable by said live lever, a dead fulcrum lever connected to said center rod, second linkage means connected to said dead fulcrum lever, a second pair of brake shoes connected to said second linkage means, a control rod actuatable by said live lever, an overtravel compensating device mounted on the control rod, activating means extending from said slack adjuster for engaging said overtravel compensating device.
Claim 2
Dependent Claim
120 words
Braking apparatus comprising an air cylinder, a piston push rod carried by said air cylinder, a live lever pivotally connected to said piston push rod, first linkage means connected to said live lever, a first pair of brake shoes connected to said linkage means, a slack adjuster connected to said live lever, a center rod actuatable by said live lever, a dead fulcrum lever connected to said center rod, second linkage means connected to said dead fulcrum lever, a second pair of brake shoes connected to said second linkage means, a control rod actuatable by said live lever, an overtravel compensating device mounted on the control rod, activating means extending from said slack adjuster for engaging said overtravel compensating device.
Claim 3
Dependent Claim
69 words
Braking apparatus according to claim 1 wherein said overtravel compensating device comprises a cylindrical member, a pair of end caps mounted on the ends of said member respectively, said control rod extending through openings in the end caps, a spring retainer fixedly mounted on said control rod within said member, a spring mounted on the control rod for acting between one of said end caps and said spring retainer.
Claim 4
Dependent Claim
139 words
Braking apparatus comprising an air cylinder, a piston push rod carried by said air cylinder, a live lever pivotally connected to said piston push rod, linkage means connected to said live lever, brake shoes connected to said linkage means, a slack adjuster connected to said live lever, a control rod actuatable by said live lever, an overtravel compensating device mounted on the control rod, activating means extending from said slack adjuster for engaging said overtravel compensating device, said overtravel compensating device including a cylindrical member, a pair of end caps mounted on the ends of said member respectively, said control rod extending through openings in the end caps, a spring retainer fixedly mounted on said control rod within said member, a spring mounted on the control rod for acting between one of said end caps and said spring retainer.
Claim 5
Dependent Claim
139 words
Braking apparatus comprising an air cylinder, a piston push rod carried by said air cylinder, a live lever pivotally connected to said piston push rod, linkage means connected to said live lever, brake shoes connected to said linkage means, a slack adjuster connected to said live lever, a control rod actuatable by said live lever, an overtravel compensating device mounted on the control rod, activating means extending from said slack adjuster for engaging said overtravel compensating device, said overtravel compensating device including a cylindrical member, a pair of end caps mounted on the ends of said member respectively, said control rod extending through openings in the end caps, a spring retainer fixedly mounted on said control rod within said member, a spring mounted on the control rod for acting between one of said end caps and said spring retainer.
Claim 6
Dependent Claim
202 words
Braking apparatus comprising an air cylinder, a piston push rod carried by said air cylinder, a live lever pivotally connected to said piston push rod, first linkage means connected to said live lever, a first pair of brake shoes connected to said linkage means, a slack adjuster having one end connected to said live lever, a center rod having one end connected to the other end of said slack adjuster, a dead fulcrum lever, the other end of said center rod being connected to said dead fulcrum lever, second linkage means connected to said dead fulcrum lever, a second pair of brake shoes connected to said second linkage means, a control roD actuatable by said live lever, an overtravel compensating device mounted on the control rod, activating means extending from said slack adjuster for engaging said overtravel compensating device, said overtravel compensating device including a cylindrical member, a pair of end caps mounted on the ends of said member respectively, said control rod extending through openings in the end caps, a spring retainer fixedly mounted on said control rod within said member, a spring mounted on the control rod for acting between one of said end caps and said lock spring retainer.
Claim 7
Dependent Claim
202 words
Braking apparatus comprising an air cylinder, a piston push rod carried by said air cylinder, a live lever pivotally connected to said piston push rod, first linkage means connected to said live lever, a first pair of brake shoes connected to said linkage means, a slack adjuster having one end connected to said live lever, a center rod having one end connected to the other end of said slack adjuster, a dead fulcrum lever, the other end of said center rod being connected to said dead fulcrum lever, second linkage means connected to said dead fulcrum lever, a second pair of brake shoes connected to said second linkage means, a control roD actuatable by said live lever, an overtravel compensating device mounted on the control rod, activating means extending from said slack adjuster for engaging said overtravel compensating device, said overtravel compensating device including a cylindrical member, a pair of end caps mounted on the ends of said member respectively, said control rod extending through openings in the end caps, a spring retainer fixedly mounted on said control rod within said member, a spring mounted on the control rod for acting between one of said end caps and said lock spring retainer.
Claim 8
Dependent Claim
286 words
Braking apparatus comprising an air cylinder, a piston push rod carried by said air cylinder, a live lever having one end pivotally connected to said piston push rod, a first pull rod having one end connected to the other end of said live lever, first linkage means connected to the other end of said first pull rod, a first pair of brake shoes connected to said linkage means, a slack adjuster having one end connected to a medial portion of said live lever, a center rod having one end connected to the other end of said slack adjuster, a dead fulcrum lever, the other end of said center rod being connected to a medial portion of said dead fulcrum lever, a second pull rod having one end connected to one end of said dead fulcrum lever, second linkage means connected to the other end of said second pull rod, a second pair of brake shoes connected to said second linkage means, an activating lever having one end connected to one end of said live lever, a control rod, a yoke connected to one end of said control rod, said yoke being pivotally mounted on said activating lever, an overtravel compensating device mounted on the control rod, an activating arm extending from said slack adjuster for engaging said overtravel compensating device, said overtravel compensating device including a nipple, a pair of end caps threadably mounted on the ends of said nipple respectively, said control rod having a threaded end portion extending through openings in the end caps, a lock nut mounted on said control rod within said nipple, a spring mounted on the control rod for acting between one of said end caps and said lock nut.
Claim 9
Dependent Claim
286 words
Braking apparatus comprising an air cylinder, a piston push rod carried by said air cylinder, a live lever having one end pivotally connected to said piston push rod, a first pull rod having one end connected to the other end of said live lever, first linkage means connected to the other end of said first pull rod, a first pair of brake shoes connected to said linkage means, a slack adjuster having one end connected to a medial portion of said live lever, a center rod having one end connected to the other end of said slack adjuster, a dead fulcrum lever, the other end of said center rod being connected to a medial portion of said dead fulcrum lever, a second pull rod having one end connected to one end of said dead fulcrum lever, second linkage means connected to the other end of said second pull rod, a second pair of brake shoes connected to said second linkage means, an activating lever having one end connected to one end of said live lever, a control rod, a yoke connected to one end of said control rod, said yoke being pivotally mounted on said activating lever, an overtravel compensating device mounted on the control rod, an activating arm extending from said slack adjuster for engaging said overtravel compensating device, said overtravel compensating device including a nipple, a pair of end caps threadably mounted on the ends of said nipple respectively, said control rod having a threaded end portion extending through openings in the end caps, a lock nut mounted on said control rod within said nipple, a spring mounted on the control rod for acting between one of said end caps and said lock nut.
Claim 10
Dependent Claim
153 words
Braking apparatus comprising an air cylinder, a piston push rod carried by said air cylinder, a live lever connected to said piston push rod, a center rod having one end pivotally connected to said live lever, a slack adjuster having one end connected to said live lever, first linkage means connected to the other end of said slack adjuster, a first pair of brake shoes connected to said linkage means, an activator lever pivotally connected to said one end of said center rod, a control rod actuatable by said activator lever, an overtravel compensating device mounted on said control rod, activating means extending from said slack adjuster for engaging said overtravel compensating device, a dead fulcrum lever, the other end of said center rod being connected to said dead fulcrum lever, second linkage means being connected to said dead fulcrum lever, a second pair of brake shoes connected to said second linkage means.
Claim 11
Dependent Claim
153 words
Braking apparatus comprising an air cylinder, a piston push rod carried by said air cylinder, a live lever connected to said piston push rod, a center rod having one end pivotally connected to said live lever, a slack adjuster having one end connected to said live lever, first linkage means connected to the other end of said slack adjuster, a first pair of brake shoes connected to said linkage means, an activator lever pivotally connected to said one end of said center rod, a control rod actuatable by said activator lever, an overtravel compensating device mounted on said control rod, activating means extending from said slack adjuster for engaging said overtravel compensating device, a dead fulcrum lever, the other end of said center rod being connected to said dead fulcrum lever, second linkage means being connected to said dead fulcrum lever, a second pair of brake shoes connected to said second linkage means.
Claim 12
Dependent Claim
69 words
Braking apparatus according to claim 6 wherein said overtravel compensating device comprises a cylindrical member, a pair of end caps mounted on the ends of said member respectively, said control rod extending through openings in the end caps, a spring retainer fixedly mounted on said control rod within said member, a spring mounted on the control rod for acting between one of said end caps and said spring retainer.
Claim 13
Dependent Claim
287 words
Braking apparatus comprising an air cylinder, a piston push rod carried by said air cylinder, a live lever having one end connected to said piston push rod, a center rod having one end pivotally connected to an intermediate portion of said live lever, a slack adjuster having one end connected to the other end of said live lever, a first pull rod having one end connected to the other end of said slack adjuster, first linkage means connected to the other end of said first pUll rod, a first pair of brake shoes connected to said linkage means, a control rod, a yoke connected to one end of said control rod, an activator lever pivotally connected to said one end of said center rod, said yoke being pivotally connected to said activator lever, an overtravel compensating device mounted on said control rod, an activating arm extending from said slack adjuster for engaging said overtravel compensating device, said overtravel compensating device including a nipple, a pair of end caps mounted on the ends of said nipple respectively, said control rod having a threaded end portion which extends through openings in the end caps respectively, a lock nut mounted on the control rod within the nipple, a spring mounted on the control rod which acts between one of said end caps and said lock nut, a dead fulcrum lever, the other end of said center rod being connected to a medial portion of said dead fulcrum lever, a second pull rod having one end connected to one end of said dead fulcrum lever, second linkage means being connected to the other end of said second pull rod, a second pair of brake shoes connected to said second linkage means.
Claim 14
Dependent Claim
287 words
Braking apparatus comprising an air cylinder, a piston push rod carried by said air cylinder, a live lever having one end connected to said piston push rod, a center rod having one end pivotally connected to an intermediate portion of said live lever, a slack adjuster having one end connected to the other end of said live lever, a first pull rod having one end connected to the other end of said slack adjuster, first linkage means connected to the other end of said first pUll rod, a first pair of brake shoes connected to said linkage means, a control rod, a yoke connected to one end of said control rod, an activator lever pivotally connected to said one end of said center rod, said yoke being pivotally connected to said activator lever, an overtravel compensating device mounted on said control rod, an activating arm extending from said slack adjuster for engaging said overtravel compensating device, said overtravel compensating device including a nipple, a pair of end caps mounted on the ends of said nipple respectively, said control rod having a threaded end portion which extends through openings in the end caps respectively, a lock nut mounted on the control rod within the nipple, a spring mounted on the control rod which acts between one of said end caps and said lock nut, a dead fulcrum lever, the other end of said center rod being connected to a medial portion of said dead fulcrum lever, a second pull rod having one end connected to one end of said dead fulcrum lever, second linkage means being connected to the other end of said second pull rod, a second pair of brake shoes connected to said second linkage means.
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) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |