Patent US3938786A successfully refreshed from Google Patents.
US3938786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for wet spraying of concrete
Assignee: Individual
•
Filing: 1974-05-02
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Granted: 1976-02-17
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Expires: 1994-05-02
Abstract
Abstract An apparatus for the wet spraying of concrete, comprising a mixer embodying a mixing container incorporating means for closing such in a gastight fashion, a compressed air source connected with the mixing container, said mixing container incorporating a closable concrete outlet opening, a substantially cylindrical concrete containing conduit detachably introduced at one inner end through the concrete outlet opening and in a position substantially in alignment with the inner wall of the mixing container and a number of supplementary air infeed conduits located near the mixer and opening into the concrete containing conduit for the infeed therein of compressed air.
Inventors
- 👤 Jean Bernold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:41
CPC Classifications
B; B28; B28C; B28C5/00; B28C5/46; B28C5/462; B28C5/02; B28C5/026; B28C5/08; B28C5/10; B28C5/12; B28C5/1223; B28C5/123
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
145 words
An apparatus for the wet spraying of concrete, comprising a mixer embodying a mixing container incorporating means for closing such in a gastight fashion, a compressed air source connected with the mixing container, said mixing container incorporating a closable concrete outlet opening defined by a connection pipe, a substantially cylindrical concrete containing conduit of substantially constant diameter detachably introduced at one inner end through the connection pipe and in a position substantially flush with the inner wall of the mixing container, and a number of supplementary air infeed conduits located near the mixer and opening into the concrete containing conduit at locations spaced circumferentially about the periphery thereof for the infeed therein of compressed air to suppress the formation of concrete slugs, the infed compressed air flowing towards the central lengthwise extending axis of the concrete containing conduit to break-up any possibly formed concrete slugs.
Claim 2
Independent Claim
145 words
An apparatus for the wet spraying of concrete, comprising a mixer embodying a mixing container incorporating means for closing such in a gastight fashion, a compressed air source connected with the mixing container, said mixing container incorporating a closable concrete outlet opening defined by a connection pipe, a substantially cylindrical concrete containing conduit of substantially constant diameter detachably introduced at one inner end through the connection pipe and in a position substantially flush with the inner wall of the mixing container, and a number of supplementary air infeed conduits located near the mixer and opening into the concrete containing conduit at locations spaced circumferentially about the periphery thereof for the infeed therein of compressed air to suppress the formation of concrete slugs, the infed compressed air flowing towards the central lengthwise extending axis of the concrete containing conduit to break-up any possibly formed concrete slugs.
Claim 3
Dependent Claim
29 words
The apparatus as defined in claim 1, wherein said number of supplementary air infeed conduits extend substantially transversely with respect to the lengthwise axis of the concrete containing conduit.
Claim 4
Dependent Claim
35 words
The apparatus as defined in claim 1, wherein said number of supplementary air infeed conduits are arranged in a common plane extending substantially radially with respect to the lengthwise axis of the concrete containing conduit.
Claim 5
Dependent Claim
43 words
The apparatus as defined in claim 1, wherein said number of supplementary air infeed conduits are arranged axially offset in the lengthwise direction of the concrete containing conduit and extend substantially radially with respect to the lengthwise axis of the concrete containing conduit.
Claim 6
Dependent Claim
28 words
The apparatus as defined in claim 1, wherein said number of supplementary air infeed conduits are inclined with respect to the lengthwise axis of the concrete containing conduit.
Claim 7
Dependent Claim
26 words
The apparatus as defined in claim 5, wherein the inclined supplementary air infeed conduits are axially offset in the lengthwise direction of the concrete containing conduit.
Claim 8
Dependent Claim
27 words
The apparatus as defined in claim 1, wherein there is provided a compressed air source of the supply of compressed air to the supplementary air infeed conduits.
Claim 9
Dependent Claim
29 words
The apparatus as defined in claim 7, wherein a common compressed air source is employed for the infeed of the supplementary air and the air into the mixing container.
Claim 10
Dependent Claim
36 words
The apparatus as defined in claim 1, further including an annular distributor conduit means for interconnecting the supplementary air infeed conduits with one another, said annular distributor conduit means being connected with said compressed air source.
Claim 11
Dependent Claim
23 words
The apparatus as defined in claim 1, further including a conically tapering concrete conduit section connected with the substantially cylindrical concrete containing conduit.
Claim 12
Dependent Claim
24 words
The apparatus as defined in claim 1, wherein said closable concrete outlet opening possesses a diameter in the order of 90 to 100 mm.
Claim 13
Dependent Claim
25 words
The apparatus as defined in claim 11, wherein the inner diameter of said cylindrical concrete containing conduit is in the order of about 70 mm.
Claim 14
Dependent Claim
33 words
The apparatus as defined in claim 12, wherein the compressed air source provides a pressure in the order of 1 to 3 atmospheres for conveying the concrete through said cylindrical concrete containing conduit.
Claim 15
Dependent Claim
25 words
The apparatus as defined in claim 1, wherein the inner diameter of said cylindrical concrete conveying conduit is in the order of about 70 mm.
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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) | 1979-02-16 | 1979-08-18 | 1980-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-16 | 1983-08-18 | 1984-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-16 | 1987-08-18 | 1988-02-17 | $7700.00 | Window Closed / Lapsed |