Patent US3874832A successfully refreshed from Google Patents.
US3874832A
Expired / Lapsed
US
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Apparatus for producing precast concrete members
Assignee: Shimizu Construction Co Ltd
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Filing: 1973-01-11
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Granted: 1975-04-01
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Expires: 1993-01-11
Abstract
Abstract An apparatus for producing precast concrete members which is efficient, mobile and cost saving, and comprises at least: a curing chamber having an opening in the portion which faces substantially a concrete placing section and having a plurality of support members to support form members leaving predetermined distance apart, a high temperature curing apparatus which is installed to said curing chamber, a concrete placing section in which necessary work for concrete placing is carried out, and a predetemined number of precast concrete form members which are disposed horizontally or vertically and moved separately between said support members in said curing chamber and said concrete placing section by horizontal transfer means.
Inventors
- 👤 Tohru Ohta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:43
CPC Classifications
B; B28; B28B; B28B15/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
327 words
Apparatus for producing precast concrete members, comprising: a curing chamber having a side facing a concrete placing section; means in said curing chamber for curing concrete; a concrete placing section having a side facing said curing chamber side; concrete form members for receiving concrete while said form members are in said concrete placing section and for forming and shaping the concrete into a predetermined shape and which carry the concrete they receive into said curing chamber; means for supporting and moving said form members into and between said curing chamber and said concrete placing section; said supporting means for said form members comprises a first plurality of vertically spaced layers of supports for concrete form members positioned in said curing chamber; a second plurality of rack means for carrying said members; said rack means being arranged one after the other in a series leading up to said curing chamber side and the last of said rack means being positioned at said curing chamber side; each said rack means being at least the length of a said form member in the dimension along the series thereof; each said rack means including a respective plurality of vertically spaced layers of supports for concrete form members; said rack means nearest said curing chamber side having said first plurality of layers of supports, and each said rack means next in series further away from said curing chamber side having one fewer of said layers of supports, reducing downwardly from the uppermost said layers of supports; each said rack means layer of supports being aligned with a respective said layer of supports being aligned with a respective said layer of supports of said curing chamber, thereby enabling said form members to be moved along said rack means and into said curing chamber; means for reciprocally moving said form members between the said rack means at which each said form member is at the top said layer of supports and said curing chamber.
Claim 2
Dependent Claim
327 words
Apparatus for producing precast concrete members, comprising: a curing chamber having a side facing a concrete placing section; means in said curing chamber for curing concrete; a concrete placing section having a side facing said curing chamber side; concrete form members for receiving concrete while said form members are in said concrete placing section and for forming and shaping the concrete into a predetermined shape and which carry the concrete they receive into said curing chamber; means for supporting and moving said form members into and between said curing chamber and said concrete placing section; said supporting means for said form members comprises a first plurality of vertically spaced layers of supports for concrete form members positioned in said curing chamber; a second plurality of rack means for carrying said members; said rack means being arranged one after the other in a series leading up to said curing chamber side and the last of said rack means being positioned at said curing chamber side; each said rack means being at least the length of a said form member in the dimension along the series thereof; each said rack means including a respective plurality of vertically spaced layers of supports for concrete form members; said rack means nearest said curing chamber side having said first plurality of layers of supports, and each said rack means next in series further away from said curing chamber side having one fewer of said layers of supports, reducing downwardly from the uppermost said layers of supports; each said rack means layer of supports being aligned with a respective said layer of supports being aligned with a respective said layer of supports of said curing chamber, thereby enabling said form members to be moved along said rack means and into said curing chamber; means for reciprocally moving said form members between the said rack means at which each said form member is at the top said layer of supports and said curing chamber.
Claim 3
Dependent Claim
61 words
An apparatus for producing precast concrete members of claim 1, wherein each said rack means layer of supports comprises: a single frame and means on said frame for supporting a single said form member; and pillars projecting away from each said frame to support that said frame spaced apart from the neighboring vertically spaced said frames of that said rack means.
Claim 4
Dependent Claim
301 words
Apparatus for producing precast concrete members, comprising: a curing chamber having a side facing a concrete placing section; means in said curing chamber for curing concrete; a concrete placing section having a side facing said curing chamber side; concrete form members for receiving concrete while said form members are in said concrete placing section and for forming and shaping the concrete into a predetermined shape and which carry the concrete they receive into said curing chamber; means for supporting and moving said form members into and between said cUring chamber and said concrete placing section; said suporting means for said form members comprises a first plurality of vertically spaced layers of supports for concrete form members positioned in said curing chamber; a second plurality of rack means for carrying said form members; said rack means being arranged one after the other in a series leading up to said curing chamber side and the last of said rack means being positioned at said curing chamber side; each said rack means being at least the length of a said form member in the dimension along the series thereof; each said rack means comprising a separate support for said form members; each said support being independently movable; each said support being at the height of a respective said layer of supports in said curing chamber, and each said support having a different respective height; each said support being of a shape which enables it to be passed under all said supports that are taller than itself and above all said supports that are shorter than itself, thereby enabling each said support to be moved up to said curing chamber side and into said curing chamber; moving means for moving each said support between said concrete placing section and the inside of said curing chamber.
Claim 5
Dependent Claim
301 words
Apparatus for producing precast concrete members, comprising: a curing chamber having a side facing a concrete placing section; means in said curing chamber for curing concrete; a concrete placing section having a side facing said curing chamber side; concrete form members for receiving concrete while said form members are in said concrete placing section and for forming and shaping the concrete into a predetermined shape and which carry the concrete they receive into said curing chamber; means for supporting and moving said form members into and between said cUring chamber and said concrete placing section; said suporting means for said form members comprises a first plurality of vertically spaced layers of supports for concrete form members positioned in said curing chamber; a second plurality of rack means for carrying said form members; said rack means being arranged one after the other in a series leading up to said curing chamber side and the last of said rack means being positioned at said curing chamber side; each said rack means being at least the length of a said form member in the dimension along the series thereof; each said rack means comprising a separate support for said form members; each said support being independently movable; each said support being at the height of a respective said layer of supports in said curing chamber, and each said support having a different respective height; each said support being of a shape which enables it to be passed under all said supports that are taller than itself and above all said supports that are shorter than itself, thereby enabling each said support to be moved up to said curing chamber side and into said curing chamber; moving means for moving each said support between said concrete placing section and the inside of said curing chamber.
Claim 6
Dependent Claim
46 words
An apparatus for producing precast concrete members of claim 3, wherein each said support comprises a respective movable truck and said truck being supported on roller means which permits said truck to be rolled toward and away from said curing chamber and into said curing chamber.
References Cited (Backward Citations)
US2640579A
Cited
US1410466A
Cited
US2258133A
Cited
US2645538A
Cited
US3227291A
Cited
US3522954A
Cited
US3610429A
Cited
US3739050A
Cited
US3659986A
Cited
US3603466A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |