Patent US3824055A successfully refreshed from Google Patents.
US3824055A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screeder
Assignee: FLEXICORE CO
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Filing: 1971-04-19
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Granted: 1974-07-16
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Expires: 1991-04-19
Abstract
Abstract Screeding apparatus for smoothing and finishing the upper surface of freshly poured concrete in the manufacture of precast concrete slabs. The screeder comprises a base frame, including a conveyor for carrying concrete filled forms through the screeder, and a vertically reciprocal screeder carriage upon which are mounted a rotatable drum, pairs of inwardly and outwardly directed scraper blades mounted downstream and upstream of the drum, rollers for engaging the upper flanges of the concrete forms passing through the screeder, wipers curved to the configuration of the drum surface and wiping the edges of the drum, and a final trowel positioned downstream of the drum and extending across the screeder to impart a final finishing and smoothing effect to the concrete as it passes through the screeder. All of the various components mounted on the screeder carriage are adjustable to permit the uncured slabs carried by the forms to be screeded level with the upper edge of the form or at depths below the upper edge of the form if somewhat thinner slabs are being manufactured.
Inventors
- 👤 T Shoe
- 👤 M Wise
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:46
CPC Classifications
B; B28; B28B; B28B11/00; B28B11/08; B28B11/0845
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
115 words
Apparatus of the type described comprising: a. a base frame, b. means for conveying a concrete form through said base frame, c. a vertically reciprocal screed carriage, d. means mounting said screed carriage for reciprocal movement on said base frame toward and away from said conveying means, e. a rotatable cylindrical drum having an axial length less than, but substantially equal to, the internal width of concrete forms conveyed through said base frame by said conveying means, and f. means rotatably mounting said drum on said screed carriage with the axis of rotation of said drum extending normal to the direction of travel of concrete forms conveyed through said base frame by said conveying means.
Claim 2
Dependent Claim
115 words
Apparatus of the type described comprising: a. a base frame, b. means for conveying a concrete form through said base frame, c. a vertically reciprocal screed carriage, d. means mounting said screed carriage for reciprocal movement on said base frame toward and away from said conveying means, e. a rotatable cylindrical drum having an axial length less than, but substantially equal to, the internal width of concrete forms conveyed through said base frame by said conveying means, and f. means rotatably mounting said drum on said screed carriage with the axis of rotation of said drum extending normal to the direction of travel of concrete forms conveyed through said base frame by said conveying means.
Claim 3
Dependent Claim
27 words
The apparatus of claim 1 further comprising: a. means for varying the pressure with which said drum engages concrete in forms carried therebeneath by said conveying means.
Claim 4
Dependent Claim
43 words
The apparatus of claim 1 further comprising: a. a fluid actuated piston and cylinder, and b. means attaching said piston and cylinder to said base frame and carriage to cause relative movement therebetween in response to relative movement between said piston and cylinder.
Claim 5
Dependent Claim
40 words
The apparatus of claim 1 further comprising: a. form engaging means mounted on said carriage and engageable with concrete forms conveyed through said base frame to position the surface of said drum with respect to concrete carried by said form.
Claim 6
Dependent Claim
18 words
The apparatus of claim 4 wherein: a. said form engaging means comprises rollers rotatably mounted on said carriage.
Claim 7
Dependent Claim
31 words
The apparatus of claim 4 wherein: a. said form engaging means comprises spaced pairs of rollers, and b. means rotatably mounting said pairs of rollers on opposite sides of said drum.
Claim 8
Dependent Claim
30 words
The apparatus of claim 4 further comprising: a. means for adjusting with respect to each other the height of said drum and said form engaging means above said conveying means.
Claim 9
Dependent Claim
31 words
The apparatus of claim 1 further comprising: a. means for scraping portions of concrete forms being conveyed through said base frame, and b. means mounting said scraping means on said carriage.
Claim 10
Dependent Claim
25 words
The apparatus of claim 8 wherein said scraping means includes: a. a first set of opposed scraper blades mounted on one side of said drum.
Claim 11
Dependent Claim
29 words
The apparatus of claim 9 wherein said scraping means includes: a. a second set of opposed scraper blades mounted on a side of said drum opposite said one side.
Claim 12
Dependent Claim
20 words
The apparatus of claim 1 further comprising: a. wiper means engaging the surface of said drum adjacent each end thereof.
Claim 13
Dependent Claim
41 words
The apparatus of claim 11 further comprising: a. wiper arms each pivotally mounted adjacent one end thereof on said carriage, b. means mounting said wiper means on opposite ends of said wiper arms, and c. means for pivoting said wiper arms.
Claim 14
Dependent Claim
20 words
The apparatus of claim 1 further comprising: a. trowel means extending transversely of said base frame downstream of said drum.
Claim 15
Dependent Claim
39 words
The apparatus of claim 13 further comprising: a. means for varying the angular disposition of said trowel means with respect to the upper surface of concrete contained in a form conveyed through said base frame by said conveying means.
Claim 16
Dependent Claim
29 words
The apparatus of claim 1 further comprising: a. receiving troughs mounted on said base frame for receiving excess concrete screeded from concrete filled forms conveyed through said base frame.
Claim 17
Dependent Claim
35 words
The apparatus of claim 1 wherein said screed carriage mounting means comprises: a. substantially vertically extending trackways on said base frame, and b. portions of said screed carriage engaged with aNd movable along said trackways.
Claim 18
Dependent Claim
18 words
The apparatus of claim 1 further comprising: a. means pivotally attaching said screed carriage to said mounting means.
Claim 19
Dependent Claim
45 words
The apparatus of claim 17 wherein said screed carriage comprises: a. an upper platform pivotally attached to said mounting means by said pivotally attaching means, b. downwardly depending side members, and c. means pivotally attaching said side members to opposite sides of said upper platform.
Claim 20
Dependent Claim
30 words
The apparatus of claim 18 further comprising: a. substantially vertically extending trackways on said base frame, and b. portions of said side members engaged with and movable along said trackways.
Claim 21
Dependent Claim
138 words
Apparatus of the type described comprising: a. a base frame having an upstream end and a downstream end, b. conveyor means mounted in said base frame for conveying concrete filled forms therethrough in a downstream direction, c. a screed carriage mounted on said base frame for movement toward and away from said conveyor means, d. a drum rotatably mounted on said carriage, e. a first pair of scrapers mounted on said carriage upstream of said drum and angularly disposed outwardly in an upstream direction, f. a second pair of scrapers mounted on said carriage downstream of said drum and angularly disposed inwardly in said upstream direction, g. a pair of drum wipers engaging the surface of said drum adjacent each end thereof, and h. a trowel extending across said conveyor means downstream of said second pair of scrapers.
Claim 22
Dependent Claim
138 words
Apparatus of the type described comprising: a. a base frame having an upstream end and a downstream end, b. conveyor means mounted in said base frame for conveying concrete filled forms therethrough in a downstream direction, c. a screed carriage mounted on said base frame for movement toward and away from said conveyor means, d. a drum rotatably mounted on said carriage, e. a first pair of scrapers mounted on said carriage upstream of said drum and angularly disposed outwardly in an upstream direction, f. a second pair of scrapers mounted on said carriage downstream of said drum and angularly disposed inwardly in said upstream direction, g. a pair of drum wipers engaging the surface of said drum adjacent each end thereof, and h. a trowel extending across said conveyor means downstream of said second pair of scrapers.
Claim 23
Dependent Claim
18 words
The apparatus of claim 20 further comprising: a. means for moving said drum wipers axially of said drum.
Claim 24
Dependent Claim
26 words
The apparatus of claim 20 further comprising: a. means for varying the relative vertical positions of said scrapers and said drum with respect to each other.
Claim 25
Dependent Claim
51 words
The apparatus of claim 20 wherein: a. said base frame includes vertical trackways engaged by portions of said screed carriage accommodating said movement toward and away from said conveyor means, and b. piston and cylinder means attached to said base frame and said carriage for moving said carriage along said trackways.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-15 | 1978-01-14 | 1978-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-15 | 1982-01-14 | 1982-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-15 | 1986-01-14 | 1986-07-16 | $7700.00 | Window Closed / Lapsed |