Formwork system

Claim 2

A framework system for connecting a pair of framework panels in either coplanar or mutually trasnverse relationship, comprising a connecting unit having a single left-hand first attachment shoe having a first front face, a first rear face and a right-hand beveled edge subtending an acute angle with said first rear face, said first shoe being formed with a first groove; a single right-hand second attachment shoe having a second front face, a second rear face, and a left-hand beveled edge subtending an acute angle with said second rear face, said second shoe being formed with a second groove; a first and a second framework panel, each of said panels having at least one edge and at least one major surface; means on said shoes for securing each of said shoes to a respective one of said framework panels, so that the rear surface of each of said shoes is in contact with said major surface of the associated panel; and a pair of alternately usable shoe clamps, including a first shoe clamp for bridging said first and second grooves only when said rear faces of said shoes and therefore said framework panels are substantially coplanar, and a second shoe clamp for bridging said first and second grooves only when said rear faces of said shoes and therefore said framework panels extend transversely to one another, each of said shoe clamps being formed with engaging portions which are spaced apart from each other and receivable in said first and second grooves, respectively, for urging the beveled edges of said shoes together as the respective clamp moves along said grooves, while the engaging portions of said respective clamp are received in said first and second grooves, respectively.

Claim 3

A framework system comprising a left-hand first attachment shoe having a first front face, a first rear face and a right-hand beveled edge subtending an acute angle with said first rear face, said first shoe being formed with a first groove; a right-hand second attachment shoe having a second front face, a secoNd rear face and a left-hand beveled edge subtending an acute angle with said second rear face, said second shoe being formed with a second groove; each of said shoes being additionally formed with a longitudinal passageway in a direction transverse to the elongation of the respective beveled edge and substantially parallel with the rear face of the respective shoe, said passageway intersecting the respective groove; a first and a second framework panel, each of said panels having at least one edge and at least one major surface; means on said shoes for securing each of said shoes to a respective one of said framework panels, so that the rear surface of each of said shoes is in contact with the major surface of the associated panel; a pair of alternately usable shoe clamps, including a first shoe clamp for bridging said first and second grooves when said rear faces of said shoes are substantially coplanar and having engaging portions spaced apart from each other and respectively slidably receivable in said grooves, and a recess behind each of said engaging portions, said recesses being aligned with said passageways when said shoes are clamped together and the rear faces of the respective shoes are substantially coplanar, and a second shoe clamp for bridging said first and second grooves when said rear faces of said shoes extend transversely to each other, and also having engaging portions which are spaced apart from each other and slidably receivable in said first and second grooves, respectively, and a cotter bar slidable into said passageway and into said recesses which are aligned therewith for locking said first clamp onto said shoes.

Claim 4

A framework system comprising a left-hand first attachment shoe having a first front face, a first rear face and a right-hand beveled edge subtending an acute angle with said first rear face, said first shoe being formed with a first groove; a right-hand second attachment shoe having a second front face, a secoNd rear face and a left-hand beveled edge subtending an acute angle with said second rear face, said second shoe being formed with a second groove; each of said shoes being additionally formed with a longitudinal passageway in a direction transverse to the elongation of the respective beveled edge and substantially parallel with the rear face of the respective shoe, said passageway intersecting the respective groove; a first and a second framework panel, each of said panels having at least one edge and at least one major surface; means on said shoes for securing each of said shoes to a respective one of said framework panels, so that the rear surface of each of said shoes is in contact with the major surface of the associated panel; a pair of alternately usable shoe clamps, including a first shoe clamp for bridging said first and second grooves when said rear faces of said shoes are substantially coplanar and having engaging portions spaced apart from each other and respectively slidably receivable in said grooves, and a recess behind each of said engaging portions, said recesses being aligned with said passageways when said shoes are clamped together and the rear faces of the respective shoes are substantially coplanar, and a second shoe clamp for bridging said first and second grooves when said rear faces of said shoes extend transversely to each other, and also having engaging portions which are spaced apart from each other and slidably receivable in said first and second grooves, respectively, and a cotter bar slidable into said passageway and into said recesses which are aligned therewith for locking said first clamp onto said shoes.

Claim 5

A formwork system as claimed in claim 1, further comprising a support beam, and at least one of said shoe clamps including a portion forming a bracket for accomodating said support beam.

Claim 6

A formwork system as claimed in claim 1, wherein said groove of each shoe extends substantially longitudinally of and faces away from the respective beveled edge.

Claim 7

A formwork system as claimed in claim 1, wherein said acute angle of each beveled edge is substantially 45*.

Claim 8

A formwork system as claimed in claim 1, wherein the beveled edges of the respective shoes are in line contact with each other when the respective clamp is in position bridging said first and second grooves.

Claim 9

A formwork system as claimed in claim 1, wherein said engaging portions are formed as ears.

Claim 10

A system as claimed in claim 1, at least one of said clamps having a surface which extends substantially perpendicular to the direction of movement of the respective clamp along said grooves and which does not intersect with said shoes, whereby an impact tool can be brought to bear on said surface for moving the respective clamp along said grooves.