US3600773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concrete-forming device
Assignee: Individual
•
Filing: 1969-03-26
•
Granted: 1971-08-24
•
Expires: 1989-03-26
Abstract
Abstract A concrete-forming device that includes an elongated open-ended mold complementary to a shape to be produced, the mold having movable lower side edge portions resiliently biased downwardly to accommodate surface irregularities for confining the concrete in the mold, with adjustable means being provided for obtaining further movement of the lower side edge portions. A hopper communicates with the upper portion of the mold for receiving concrete to flow by gravity into the mold, and a vibrator is introduced into the concrete to cause it to fill the entire section of the mold. Steerable wheels are at the front of the unit, which is powered by an electric motor winding a cable to pull the machine forwardly.
Inventors
- 👤 Leland J Davis
- 👤 Paul T Ogilvie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:13
CPC Classifications
E; E01; E01C; E01C19/00; E01C19/48; E01C19/4886; E01C19/4893
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
134 words
A device for producing an elongated concrete article comprising an elongated mold having a substantially uniform cross section, said mold having an open bottom and rearwarD end, said mold including a duality of sideplates disposed one at either lower edge of said mold, guide means for allowing vertical movement of said sideplates relative to said lower side edges of said mold, resilient means biasing said side plates downwardly for engaging a surface beneath said mold, selectively movable means for moving said sideplates downwardly, a hopper communicating with the upper portion of said mold for introducing concrete therein, a vibrator for insertion into concrete received in said hopper, steerable wheels at the forward end of said mold for controlling the direction of movement thereof, and means for moving said mold in a generally longitudinal direction.
Claim 2
Independent Claim
134 words
A device for producing an elongated concrete article comprising an elongated mold having a substantially uniform cross section, said mold having an open bottom and rearwarD end, said mold including a duality of sideplates disposed one at either lower edge of said mold, guide means for allowing vertical movement of said sideplates relative to said lower side edges of said mold, resilient means biasing said side plates downwardly for engaging a surface beneath said mold, selectively movable means for moving said sideplates downwardly, a hopper communicating with the upper portion of said mold for introducing concrete therein, a vibrator for insertion into concrete received in said hopper, steerable wheels at the forward end of said mold for controlling the direction of movement thereof, and means for moving said mold in a generally longitudinal direction.
Claim 3
Dependent Claim
36 words
A device as recited in claim 1 in which said means for moving said mold includes a drum, a cable wound on said drum and attachable to a stationary object, and means for rotating said drum.
Claim 4
Dependent Claim
19 words
A device as recited in claim 2 in which said means for rotating said drum is an electric motor.
Claim 5
Dependent Claim
36 words
A device as recited in claim 3 in which said vibrator is electrically driven, and in which said vibrator and motor are series connected to allow operation of said motor only upon operation of said vibrator.
Claim 6
Dependent Claim
53 words
A device as recited in claim 1 in which said mold on one side includes a relatively high portion complementary to a curb, the remaining portion of said mold being relatively low and complementary to a gutter, said portions of said mold being in communication for producing an integral curb and gutter combination.
Claim 7
Dependent Claim
36 words
A device as recited in claim 5 in which said hopper includes a diagonal wall portion over said remaining portion of said mold for assisting in directing concrete to said relatively high portion of said mold.
Claim 8
Dependent Claim
46 words
A device as recited in claim 5, including in addition a vertically movable gate for blocking off said relatively high portion of said mold, and means for progressively moving said gate vertically for providing a gradual transition between a curb and gutter at a driveway entrance.
Claim 9
Dependent Claim
45 words
A device as recited in claim 1 including in addition vertically adjustable means along either side of the rearward portion of said mold, said vertically adjustable means having lower portions adapted to engage a surface beneath the same for providing a support for said device.
Claim 10
Dependent Claim
27 words
A device as recited in claim 8 in which said lower portions of said vertically adjustable means are elongated skids, said skids having upwardly inclined forward ends.
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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) | 1974-08-23 | 1975-02-22 | 1975-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-23 | 1979-02-22 | 1979-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-23 | 1983-02-22 | 1983-08-24 | $7700.00 | Window Closed / Lapsed |