US3685405A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extrusion moulding
Assignee: Individual
•
Filing: 1970-04-14
•
Granted: 1972-08-22
•
Expires: 1990-04-14
Abstract
Abstract A moulding machine for the continuous extrusion moulding of concrete comprising a hopper for the concrete to be moulded, a mould opening into the hopper, immersion vibrators in the hopper and concentrated mainly in the region of the hopper above the top of the mould, a further vibrator attached to the mould to prevent adhesion of the moulding to the mould, said hopper and mould being movable to extrude the concrete through the mould.
Inventors
- 👤 Dean Barry Mcdonald
- 👤 Albert James Mcbride
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:06
CPC Classifications
E; E01; E01C; E01C19/00; E01C19/48; E01C19/4886; E01C19/4893
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
148 words
A moulding machine for the continuous extrusion of a relatively large size moulding comprising a hopper open at the top and bottom for containing the material to be moulded, an elongate mould member, substantially narrower than said hopper, opening through one wall of the hopper having parallel sides and being open at the bottom thereof, a plurality of immersion vibrators positioned in the hopper, said hopper and mould being movable in the longitudinal direction of the mould member to extrude the material in the hopper through the mould member, at least those parts of said one hopper wall adjacent either side of the mould opening being flat and substantially perpendicular to the longitudinal axis of the mould member and to the walls of said mould member at said one wall, and the upper side of said mould member having a vertically extending substantial taper opening to said hopper.
Claim 2
Dependent Claim
148 words
A moulding machine for the continuous extrusion of a relatively large size moulding comprising a hopper open at the top and bottom for containing the material to be moulded, an elongate mould member, substantially narrower than said hopper, opening through one wall of the hopper having parallel sides and being open at the bottom thereof, a plurality of immersion vibrators positioned in the hopper, said hopper and mould being movable in the longitudinal direction of the mould member to extrude the material in the hopper through the mould member, at least those parts of said one hopper wall adjacent either side of the mould opening being flat and substantially perpendicular to the longitudinal axis of the mould member and to the walls of said mould member at said one wall, and the upper side of said mould member having a vertically extending substantial taper opening to said hopper.
Claim 3
Dependent Claim
42 words
A moulding machine as claimed in claim 1, wherein a majority of the plurality of said vibrators are positioned in an upper part of said hopper above the level of the top of the opening of the mould member into the hopper.
Claim 4
Dependent Claim
43 words
A moulding machine as claimed in claim 2, wherein said vibrators are mounted on the wall of the hopper opposite said one wall by meanS of mounting devices which allow a limited amount of free movement of the mounted end of the vibrators.
Claim 5
Dependent Claim
45 words
A moulding machine as claimed in claim 2, wherein there is at least one vibrator mounted below the level of the top of the opening of the mould member into the hopper, the or each such vibrator projecting a small amount into the mould member.
Claim 6
Dependent Claim
18 words
A moulding machine as claimed in claim 1, wherein a further vibrator is attached to the mould member.
Claim 7
Dependent Claim
35 words
A moulding machine as claimed in claim 5, wherein said further vibrator is attached to the top of the mould member and is closer to the hopper than to the outlet of the mould member.
Claim 8
Dependent Claim
50 words
A moulding machine as claimed in claim 1, wherein the mould member is vertically extended at the opening to the hopper by about one third of the height of the moulded section, said extension tapering substantially uniformly, in the vertical direction, to nothing at the outlet of the mould member.
Claim 9
Dependent Claim
30 words
A moulding machine as claimed in claim 6, wherein said further vibrator is attached to the mould member closer to the hopper than to the outlet of the mould member.
Claim 10
Dependent Claim
46 words
A moulding machine as claimed in claim 8, wherein there are at least six vibrators in a V-shaped pattern when viewed in the longitudinal direction of the machine, at least five of the vibrators being located above the level of the top of the mould opening.
Claim 11
Dependent Claim
36 words
A moulding machine as claimed in claim 1, wherein the mould member is elongate in the vertical dimension and all of the immersion vibrators are located above the level of the top of the mould opening.
Claim 12
Dependent Claim
38 words
The device of claim 1 wherein said one wall of the hopper is vertical along the portion to which the mould side wall is attached so that a vertical substantially right angle joint is formed between said walls.
Claim 13
Independent Claim
144 words
A device for extrusion moulding a monolithic material into a longitudinally extending upstanding shape of relatively large dimension without fixed forms, comprising: a. a hopper to receive the material to be moulded; b. means within the hopper to vibrate said material; c. an opened bottomed mould positioned adjacent the end wall of said hopper, said mould having parallel side walls conforming to said shape and having a cross-section substantially narrower than said hopper with its longitudinal axis parallel to the axis of said shape; d. means to move the mould and hopper along their longitudinal axis; e. an opening between said hopper and said mould defined by a joint between said mould side walls and said hopper end wall, said walls being substantially perpendicular to each other; f. the upper side of said mould having a vertically extending substantial taper opening to said hopper.
Claim 14
Independent Claim
144 words
A device for extrusion moulding a monolithic material into a longitudinally extending upstanding shape of relatively large dimension without fixed forms, comprising: a. a hopper to receive the material to be moulded; b. means within the hopper to vibrate said material; c. an opened bottomed mould positioned adjacent the end wall of said hopper, said mould having parallel side walls conforming to said shape and having a cross-section substantially narrower than said hopper with its longitudinal axis parallel to the axis of said shape; d. means to move the mould and hopper along their longitudinal axis; e. an opening between said hopper and said mould defined by a joint between said mould side walls and said hopper end wall, said walls being substantially perpendicular to each other; f. the upper side of said mould having a vertically extending substantial taper opening to said hopper.
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) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |