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US 4,054,259 AGranted
Waler-stiffback bracket
AssigneeNone recorded
InventorCalvin R. Johnson
Life of this patent
Estimating the term…
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AssigneeNone recorded
InventorCalvin R. Johnson
Estimating the term…
A bracket is provided including first and second elongated upper horizontal and lower upstanding flanges joined at adjacent inner and upper ends. The outer end of the first horizontal flange terminates in an upstanding waler retaining flange and the upper end of the waler retaining flanges terminates in an outwardly directed horizontal extension flange. The second upstanding flange is provided with an opening formed therethrough closely below the horizontal flange and rod tensioning structure is supported from the waler retaining flange on the outer side thereof for engaging and tensioning a rod projecting through the opening. Further, the outer end of the extension flange includes a transverse marginal edge portion whose opposite ends are provided with vertical openings formed therethrough and a stiffback camming structure is provided and includes hooked portions removably engaged in the openings formed through the extension flange and is operable, in a first form thereof, to cam a single stiffback into tight abutting engagement with the outer end of the extension flange. A second form of stiffback camming structure is operable to cam a pair of stiffbacks against the outer side of a waler retained in position by means of the waler retaining flange.
A waler and stiffback bracket including a first elongated upper horizontal flange and a second lower upstanding flange, said flanges being joined at adjacent inner and upper ends thereof, respectively, the outer end of said first horizontal flange terminating in an upstanding waler retaining flange, said second flange including an opening formed therethrough closely below said first flange for receiving a horizontal tie rod therethrough, and rotary cam means supported from said waler retaining flange on the outer side thereof for angular displacement about an axis generally normal to said waler retaining flange, said cam means including a cam portion thereof swingable into position below said first flange and including cam surfaces for engaging a head portion on the end of said rod projecting through said opening, an elongated horizontal abutment member supported from and extending lengthwise beneath said first flange and registered with said opening, one end of said abutment member being abutted against the adjacent side of said second flange and the other end of said abutment member being at least substantially coplanar with the outer side of said waler retaining flange, said other end of said abutment member and said cam portion including coacting thrust bearing surfaces for transferring tension forces applied to said rod by said cam means directly lengthwise through said abutment member to said second flange, said first, second and waler retaining flanges comprising first end, intermediate and second end sections of a single elongated metal strap member oppositely right angularly oriented along transverse zones spaced along said strap member.
A waler and stiffback bracket including a first elongated upper horizontal flange and a second lower upstanding flange, said flanges being joined at adjacent inner and upper ends thereof, respectively, the outer end of said first horizontal flange terminating in an upstanding waler retaining flange, said second flange including an opening formed therethrough closely below said first flange for receiving a horizontal tie rod therethrough, and rod tensioning means supported from said waler retaining flange on the outer side thereof for engaging and tensioning a rod projecting through said opening, an elongated horizontal abutment member supported from and extending lengthwise beneath said first flange and registered with said opening, one end of said abutment member being abutted against the adjacent side of said second flange and the other end of said abutment member being at least substantially coplanar with the outer side of said waler retaining flange, said other end of said abutment member and said rod tensioning means including coacting thrust bearing surfaces for transferring torsional forces applied to said rod by said tensioning means lengthwise through said abutment member to said second flange, said first, second and waler retaining flange comprising first end, intermediate and second end sections of a single elongated metal sharp member oppositely right angularly oriented along transverse zones spaced along said strap member.
A waler and stiffback bracket including a first elongated upper horizontal flange and a second lower upstanding flange, said flanges being joined at adjacent inner and upper ends thereof, respectively, the outer end of said first horizontal flange terminating in an upstanding waler retaining flange, said second flange including an opening formed therethrough closely below said first flange for receiving a horizontal tie rod therethrough, and rod tensioning means supported from said waler retaining flange on the outer side thereof for engaging and tensioning a rod projecting through said opening, the upper end of said waler retaining flange terminating in an outwardly directed horizontal extension flange, the outer transverse marginal edge portion of said extension flange including opposite end portions defining anchor portions thereon, and a stiffback clamp including a horizontal U-shaped frame including a pair of parallel legs interconnected at one pair of corresponding ends by means of a bight portion extending therebetween and spaced horizontally outwardly from said outer transverse marginal edge portion, the other pair of corresponding ends of said legs including anchor means removably engaged with said anchor portions, a cam lever having one end rotatably engaged with said bight portion and including a cam surface for engaging and caming a stiffback disposed between said legs into tight abutting engagement with the outer end of said extension flange.
A waler and stiffback bracket including a first elongated upper horizontal flange and a second lower upstanding flange, said flanges being joined at adjacent inner and upper ends thereof, respectively, the outer end of said first horizontal flange terminating in an upstanding waler retaining flange, said second flange including an opening formed therethrough closely below said first flange for receiving a horizontal tie rod therethrough, and rod tensioning means supported from said waler retaining flange on the outer side thereof for engaging and tensioning a rod projecting through said opening, the upper end of said waler retaining flange terminating in an outwardly directed horizontal extension flange, the outer transverse marginal edge portion of said extension flange including opposite end portions defining anchor portions thereon, and a double stiffback clamp comprising a U-shaped frame including a pair of generally parallel arms interconnected at one pair of corresponding ends by means of a transverse member extending therebetween and spaced horizontally outwardly from said outer transverse marginal edge portion, the central portion of said transverse member having elongated anchor rod means pivotally secured thereto at one end for angular displacement of said transverse member relative to said anchor rod means, the other end of said anchor rod means including anchor means removably engaged with said anchor portions, the opposite end portions of said transverse member including eccentric cam portions projecting outwardly of the side of said transverse member from which said arms project, the free ends of said arms including means for anchoring said arms to a waler supported from said first flange.
A waler and stiffback bracket including a first elongated upper horizontal flange and a second lower upstanding flange, said flanges being joined at adjacent inner and upper ends thereof, respectively, the outer end of said first horizontal flange terminating in an upstanding waler retaining flange, said second flange including an opening formed therethrough closely below said first flange for receiving a horizontal tie rod therethrough, and rod tensioning means supported from said waler retaining flange on the outer side thereof for engaging and tensioning a rod projecting through said opening, a horizontally outwardly projecting extension flange also supported from said waler retaining flange and generally horizontally registered with the upper marginal edge of said waler retaining flange, the outer transverse marginal edge portion of said extension flange including opposite end portions defining anchor portions thereon, a double stiffback clamp comprising a U-shaped frame including a pair of generally parallel arms interconnected at one pair of corresponding ends by means of a transverse member extending therebetween and spaced horizontally outwardly from said outer transverse marginal edge portion, the central portion of said transverse member having elongated anchor rod means pivotally secured thereto at one end for angular displacement of said transverse member relative to said anchor rod means, the other end of said anchor rod means including anchor means removably engaged with said anchor portions, the opposite end portions of said transverse member including eccentric cam portions projecting outwardly of the side of said transverse member from which said arms project, the free ends of said arms including means for anchoring said arms to a waler supported from said first flange.
Dependencies are inferred from the claim text.
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No related US applications are recorded in the indexed filing history.
Connecting or other auxiliary members for forms, falsework structures, or shutterings: connecting or fastening means for non-metallic forming or…
One-piece elements: remaining completely or partially embedded in the cast material
Scaffolding
Term ended 18 Oct 1994 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
When constructing concrete forms a contractor has in the past been forced to use different types of brackets for piecemeal forms, gang forms, five thousand pound forms and three thousand pound forms. In addition, in some different lengths of ties are required when stiffbacks are utilized. Accordingly, a considerable inventory of different types of brackets and different length ties must be maintained at all times representing a considerable expense.
The waler and stiffback bracket of the instant invention has been specifically designed to be used either with walers alone, walers and single stiffbacks and walers used in conjunction with double stiffbacks. Further, the bracket is constructed in a manner whereby the same length ties may be used in each instance.
The main object of this invention is to provide a universal type of bracket designed to utilize only one length of tie in substantially all applications of the bracket.
FIG. 1 is a fragmentary, prospective view of the bracket of the instant invention utilized in a double stiffback installation through the use of a special double stiffback clamp.
FIG. 2 is an enlarged fragmentary vertical sectional view taken substantially upon the plane indicated by the section line 2--2 of FIG. 1;
FIG. 3 is an exploded prospective view of the bracket illustrated in FIGS. 1 and 2;
Referring now more specifically to the drawings the numeral 10 generally designates a concrete form including an outer wall 12. The wall 12 has an opening 14 formed therethrough and a rod 16 including an enlarged outer end 18 projects through the opening 14.
A first form of bracket is referred to in general by the reference numeral 20 and includes first and second upper horizontal and lower vertical flanges 22 and 24 joined as at 26 at adjacent ends. The flange 24 includes a vertical downwardly opening slot 28 formed therein and the upper end of the slot defines an opening immediately beneath the flange 22 which in alignment with the opening 24 when the bracket 20 is applied to the wall 12.
The outer end of the flange 22 terminates in an upwardly directed waler retaining flange 30 and the upper end of the flange 30 terminates in an outwardly directed extension flange 32 whose outer end includes a transverse marginal portion 34 whose opposite ends are provided with vertical openings 36 formed therethrough.