US3901472A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable apparatus for sliding form construction
Assignee: Individual
•
Filing: 1973-12-10
•
Granted: 1975-08-26
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Expires: 1993-12-10
Abstract
Abstract In an apparatus for sliding form construction of vertical structures of variable cross-section, the sliding form comprises a number of sliding form portions associated with relatively movable beams. The sliding form is associated with a rigid structure movably mounted to the structure as cast. The rigid structure is provided with pressure medium actuated engaging means which are adapted, for guiding the structure, to engage the cast and hardened section of the structure. The rigid structure is provided with a mast structure connected thereto, which is intended for a crane and/or a hoist. The mast structure is suspended in the rigid structure by means of jacks to permit shifting of it independently of the sliding form.
Inventors
- 👤 Nils Harald Ahlgren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:55
CPC Classifications
E; E04; E04G; E04G11/00; E04G11/06; E04G11/20; E04G11/22
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
196 words
An apparatus for sliding form construction of vertical structures of concrete having variable cross-section, wherein the sliding form comprises: a plurality of sliding form portions; a plurality of beam members in fixed angular relationship one to another, but mounted for movement relative to one another while retaining said fixed angular relationship, the relative movement one to another of said beam members being substantially horizontal; said sliding form portions being arranged with said beam members so that said sliding form portions may be inclined to the vertical by aDjusting their relative positions with respect to said beam members; guide members associated with each pair of beam members having fixed angular relationship between them, so as to retain said fixed angular relationship as the beams are moved relative to each other; corner-shaping sliding form elements connected to said guide members; and a rigid structure associated with said movable beam members and having support means therefor; so that said movable beam members are movable on said support means relative to said rigid structure; said rigid structure being mounted so as to be raised by cooperation of climbing jack means secured thereto with climbing rods placed in said concrete structure.
Claim 2
Independent Claim
196 words
An apparatus for sliding form construction of vertical structures of concrete having variable cross-section, wherein the sliding form comprises: a plurality of sliding form portions; a plurality of beam members in fixed angular relationship one to another, but mounted for movement relative to one another while retaining said fixed angular relationship, the relative movement one to another of said beam members being substantially horizontal; said sliding form portions being arranged with said beam members so that said sliding form portions may be inclined to the vertical by aDjusting their relative positions with respect to said beam members; guide members associated with each pair of beam members having fixed angular relationship between them, so as to retain said fixed angular relationship as the beams are moved relative to each other; corner-shaping sliding form elements connected to said guide members; and a rigid structure associated with said movable beam members and having support means therefor; so that said movable beam members are movable on said support means relative to said rigid structure; said rigid structure being mounted so as to be raised by cooperation of climbing jack means secured thereto with climbing rods placed in said concrete structure.
Claim 3
Dependent Claim
23 words
An apparatus as claimed in claim 1, wherein said movable beam members cooperate with horizontally extending sliding surfaces carried by said rigid structure.
Claim 4
Dependent Claim
26 words
An apparatus as claimed in claim 2, wherein said movable beam members are mounted so as to be moved on said horizontally extending surfaces by jacks.
Claim 5
Dependent Claim
28 words
An apparatus as claimed in claim 1, wherein said corner-shaping sliding form elements are resilient so to permit them being pressed against their respective adjacent sliding form portions.
Claim 6
Dependent Claim
26 words
An apparatus as claimed in claim 4, wherein pressure absorbing adjustable connecting means are provided for connecting said resilient corner-shaping form elements to said guide members.
Claim 7
Dependent Claim
38 words
An apparatus as claimed in claim 4, wherein the edges of said corner-shaping form elements are provided with contact elements of a material such as sheet metal, which contact elements are movable relative to said corner-shaping form elements.
Claim 8
Dependent Claim
13 words
An apparatus as claimed in claim 6, wherein said contact elements are flexible.
Claim 9
Dependent Claim
21 words
An apparatus as claimed in claim 6, wherein said contact elements are slidable along the edges of said corner-shaping form elements.
Claim 10
Dependent Claim
31 words
An apparatus as claimed in claim 1, wherein said rigid structure is mounted for engagement with a surface of an already cast and hardened portion of the concrete structure being constructed.
Claim 11
Dependent Claim
49 words
An apparatus as claimed in claim 1, wherein said rigid structure is further provided with a mast structure connected thereto, and wherein said mast structure is suspended from said rigid structure by means of suspension jacks so that said mast structure may be raised independently of said rigid structure.
Claim 12
Dependent Claim
34 words
An apparatus as claimed in claim 10, wherein said mast structure is provided with resilient surface engaging elements which frictionally engage a surface of the concrete structure being constructed, below said sliding form portions.
Claim 13
Dependent Claim
22 words
An apparatus as claimed in claim 11, wherein a plurality of resilient surface engaging elements are provided, facing in several different directions.
Claim 14
Dependent Claim
21 words
An apparatus as claimed in claim 10, wherein said suspension jacks have pressure systems which are connected to overload protection means.
Claim 15
Dependent Claim
33 words
An apparatus as claimed in claim 10, wherein the said suspension jacks have pressure systems which are connected to the same pressure medium system so as to assure uniform loading of said jacks.
Claim 16
Dependent Claim
13 words
An apparatus as claimed in claim 3 wherein said jacks are screw-type jacks.
Claim 17
Dependent Claim
25 words
An apparatus as claimed in claim 9, wherein said rigid structure engages said concrete structure by pressureabsorbing cylinder and piston means having a pressure medium.
Claim 18
Dependent Claim
31 words
An apparatus as claimed in claim 1, where said rigid structure is adapted to engage a surface of the concrete structure being constructed at a place below said sliding form portions.
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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) | 1978-08-25 | 1979-02-24 | 1979-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-25 | 1983-02-24 | 1983-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-25 | 1987-02-24 | 1987-08-26 | $7700.00 | Window Closed / Lapsed |