US3828688A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dynamic stop
Assignee: FKI Industries Inc
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Filing: 1972-11-24
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Granted: 1974-08-13
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Expires: 1992-11-24
Abstract
Abstract A dynamic stop for an operator-less railway transportation system consisting of an arm positioned between the tracks of the transportation system and pivotably mounted so that it does not interfere with the passage of the cars of the railway transportation system when not in use, but may be rotated up so that an absorbent stop plate mounted thereon will contact an absorbent bumper mounted on the front of the car which it is desired to stop. The dynamic stop may be mounted on a reciprocating device to further absorb the energy of contact.
Inventors
- 👤 B Bradbury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:16
CPC Classifications
B; B61; B61K; B61K7/00; B61K7/16; B61K7/18; B61K7/02; B61K7/04; B61K7/08
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
98 words
A dynamic stop for selectively stopping the cars of a unit transporation system having a plurality of cars which travel along tracks, said dynamic stop comprising: 1. a pivot shaft adapted to be pivotably mounted adjacent to the tracks of a unit transportation system in a direction generally perpendicular to the direction of movement of the cars on the tracks; 2. a pivot arm mounted for pivoting around said pivot shaft; 3. a stop arm pivotably connected to said pivot arm about an axis parallel to said pivot shaft at a point thereon remote from said pivot shaft;
Claim 2
Dependent Claim
98 words
A dynamic stop for selectively stopping the cars of a unit transporation system having a plurality of cars which travel along tracks, said dynamic stop comprising: 1. a pivot shaft adapted to be pivotably mounted adjacent to the tracks of a unit transportation system in a direction generally perpendicular to the direction of movement of the cars on the tracks; 2. a pivot arm mounted for pivoting around said pivot shaft; 3. a stop arm pivotably connected to said pivot arm about an axis parallel to said pivot shaft at a point thereon remote from said pivot shaft;
Claim 3
Dependent Claim
10 words
a pivot arm mounted for pivoting around said pivot shaft;
Claim 4
Dependent Claim
10 words
a pivot arm mounted for pivoting around said pivot shaft;
Claim 5
Dependent Claim
78 words
A dynamic stop as claimed in claim 1 in which the piston of said dual-action fluid cylinder is connected to said pivot arm by means of a cam arm which acts as a linkage therebetween, said cam arm being pIvotably connected to said pivot arm at a point thereon remote from said pivot shaft and the piston of said dual-action fluid cylinder being pivotably connected to said cam arm at a point thereon remote from said pivot arm.
Claim 6
Dependent Claim
25 words
A roller bearing rotatably mounted on said cam arm in a position to cooperate with said cam track during actuation of said dual-action fluid cylinder.
Claim 7
Dependent Claim
25 words
A roller bearing rotatably mounted on said cam arm in a position to cooperate with said cam track during actuation of said dual-action fluid cylinder.
Claim 8
Dependent Claim
11 words
A dynamic stop as claimed in claim 2 and further comprising:
Claim 9
Dependent Claim
26 words
a stop arm pivotably connected to said pivot arm about an axis parallel to said pivot shaft at a point thereon remote from said pivot shaft;
Claim 10
Dependent Claim
26 words
a stop arm pivotably connected to said pivot arm about an axis parallel to said pivot shaft at a point thereon remote from said pivot shaft;
Claim 11
Dependent Claim
39 words
A shock absorber operatively connecting said stop arm to said pivot arm so as to resist pivoting movement of said stop arm with respect to said pivot arm in the direction of movement of the cars on the tracks;
Claim 12
Dependent Claim
39 words
A shock absorber operatively connecting said stop arm to said pivot arm so as to resist pivoting movement of said stop arm with respect to said pivot arm in the direction of movement of the cars on the tracks;
Claim 13
Dependent Claim
39 words
A shock absorber operatively connecting said stop arm to said pivot arm so as to resist pivoting movement of said stop arm with respect to said pivot arm in the direction of movement of the cars on the tracks;
Claim 14
Dependent Claim
39 words
A shock absorber operatively connecting said stop arm to said pivot arm so as to resist pivoting movement of said stop arm with respect to said pivot arm in the direction of movement of the cars on the tracks;
Claim 15
Dependent Claim
59 words
A dynamic stop as claimed in claim 3 and comprising at least two sub-assemblies each one of which comprises a pivot arm, a stop arm, and a shock absorber connected together in the manner previously recited, whereby each sub-assembly acts separately, thereby compensating for slight variations in the direction of motion of the cars of the unit transportation system.
Claim 16
Dependent Claim
59 words
A dynamic stop as claimed in claim 1 and comprising at least two sub-assemblies each one of which comprises a pivot arm, a stop arm, and a shock absorber connected together in the manner previously recited, whereby each sub-assembly acts separately, thereby compensating for slight variations in the direction of motion of the cars in the unit transportation system.
Claim 17
Dependent Claim
72 words
A dual-action fluid cylinder having a piston which is pivotably connected to said pivot arm at a point thereon remote from said pivot shaft for causing said pivot arm to pivot about said pivot shaft to shift said stop arm between operative and inoperative positions, said fluid cylinder being adapted to be pivotably mounted adjacent to the tracks of a unit transportation system about an axis generally parallel to said pivot shaft.
Claim 18
Dependent Claim
72 words
A dual-action fluid cylinder having a piston which is pivotably connected to said pivot arm at a point thereon remote from said pivot shaft for causing said pivot arm to pivot about said pivot shaft to shift said stop arm between operative and inoperative positions, said fluid cylinder being adapted to be pivotably mounted adjacent to the tracks of a unit transportation system about an axis generally parallel to said pivot shaft.
Claim 19
Dependent Claim
72 words
A dual-action fluid cylinder having a piston which is pivotably connected to said pivot arm at a point thereon remote from said pivot shaft for causing said pivot arm to pivot about said pivot shaft to shift said stop arm between operative and inoperative positions, said fluid cylinder being adapted to be pivotably mounted adjacent to the tracks of a unit transportation system about an axis generally parallel to said pivot shaft.
Claim 20
Dependent Claim
72 words
A dual-action fluid cylinder having a piston which is pivotably connected to said pivot arm at a point thereon remote from said pivot shaft for causing said pivot arm to pivot about said pivot shaft to shift said stop arm between operative and inoperative positions, said fluid cylinder being adapted to be pivotably mounted adjacent to the tracks of a unit transportation system about an axis generally parallel to said pivot shaft.
Claim 21
Dependent Claim
60 words
A dynamic stop as claimed in claim 1 and further comprising means for biasing said stop arm with respect to said pivot arm in the direction opposite to the movement of the cars on the track, whereby said stop arm will have a tendency to return to an initial position after one of the cars has been stopped by it.
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) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |