Patent US3733141A successfully refreshed from Google Patents.
US3733141A
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US
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Machine for forming curbing
Assignee: Renner Co
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Filing: 1971-12-20
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Granted: 1973-05-15
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Expires: 1991-12-20
Abstract
Abstract A machine for forming curbing consisting of a manually operable steerable device which compacts and shapes asphaltic concrete or portland cement mixes having no slump characteristics into uniform curbing. The machine has a curb forming shoe with a hopper thereabove and communicating therewith and a manually controlled ram to which a closure plate is hinged. Operation of the ram and the closure plate permits the asphaltic or portland cement mix to fall by gravity into the shoe where operation of the ram compacts the mix in the shoe to form the curbing. The reaction force moves the machine away from the newly extruded curbing.
Inventors
- 👤 W James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:52
CPC Classifications
E; E01; E01C; E01C19/00; E01C19/48; E01C19/4886; E01C19/4893
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
123 words
A machine for forming curbing consisting of an elongated curb forming shoe having an opening in the upper portion thereof, a hopper for receiving curbing material mounted on said curb forming shoe and in communication with said opening, a ram disposed within said curb forming shoe and having a cross sectional configuration corresponding substantially thereto, a lever pivoted to said machine and extending outwardly therefrom for manual actuation and a link connecting said ram and said lever whereby said ram may be reciprocally moved in said shoe, a closure member positioned in said hopper and hinged to said ram and extending upwardly on an angle thereabove and adapted when moved by said ram to cover said opening and agitate material in said hopper.
Claim 2
Dependent Claim
123 words
A machine for forming curbing consisting of an elongated curb forming shoe having an opening in the upper portion thereof, a hopper for receiving curbing material mounted on said curb forming shoe and in communication with said opening, a ram disposed within said curb forming shoe and having a cross sectional configuration corresponding substantially thereto, a lever pivoted to said machine and extending outwardly therefrom for manual actuation and a link connecting said ram and said lever whereby said ram may be reciprocally moved in said shoe, a closure member positioned in said hopper and hinged to said ram and extending upwardly on an angle thereabove and adapted when moved by said ram to cover said opening and agitate material in said hopper.
Claim 3
Dependent Claim
35 words
The curb forming machine set forth in claim 1 and wherein side plates are secured to said closure member and moved therewith into and out of vertical slots in said hopper adjacent said closure member.
Claim 4
Dependent Claim
30 words
The curb forming machine set forth in claim 1 and wherein said hopper includes one substantially vertical wall with the free edge of said closure member slidably engaging the same.
Claim 5
Dependent Claim
40 words
The curb forming machine set forth in claim 1 and wherein one end of said curb forming shoe is curved outwardly so as to form an area of gradual separation with respect to curbing shaped therein and moving relative thereto.
Claim 6
Dependent Claim
30 words
The curb forming machine set forth in claim 1 and wherein a bottom member is affixed to said curb forming shoe in the area thereof in which said ram moves.
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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) | 1976-05-14 | 1976-11-13 | 1977-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-14 | 1980-11-13 | 1981-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-14 | 1984-11-13 | 1985-05-15 | $7700.00 | Window Closed / Lapsed |