A vertical joint system for substrates is formed with joints and which engaged by relative motion in a direction perpendicular to major surfaces and of the substrate. The joints are configured to enable relative rotation of up to 3 degrees while maintaining engagement of the joints. The joints and are further configured to form two locking planes one on each of the inner and outer most sides of the joint. Engagement about the locking planes is provided by transverse outward extending surfaces. At least one surface in each pair of engaging surfaces is smoothly curved. The joints and can be further arranged to provide a third locking plane parallel to and between the locking planes. The joints are disengaged by combination of a downward rotation of one joint relative the other then application of a downward force.

A floor stripping machine blade of a blade assembly has a leading edge, when the blade assembly is attached to a floor stripping machine, at an angle that is other than perpendicular to the direction of travel of the floor stripping machine, said angle of the blade's leading edge being fixed or adjustable.

A new athletic floor resiliently retrofit to a worn athletic floor. The worn floor includes a plurality of elongated raised channels spaced from one another and connected to a ground substrate. The new athletic floor includes at least two elongated subfloor panels. At least two elongated raised channels are spaced from one another and have a first set of adjoined elongated subfloor panels located therebetween. At least one elongated raised channel is spaced therefrom and has a second set of adjoined elongated subfloor panels located therebetween. A resilient pad is positioned between each elongated subfloor panel and the ground substrate. A new flooring is located on the first and second sets of elongated subfloor panels, covering at least one elongated raised channel, and a bottom surface of the new flooring is spaced from a top surface of the elongated raised channel by a gap.

A carpet cutting apparatus comprises a bottom plate and a blade-mounting structure. The bottom plate has a rear flat portion, and a front pointed and slanted tip; and the blade-mounting structure comprises a rear base plate and a forward hood portion, the forward hood portion is configured to engage a blade within a blade holder by means of plurality of screws. The forward hood portion is configured to have a hole to engage a cable hook. A system of carpet cutting and removing comprises a winch connected to a first end of a cable, a carpet cutting apparatus, and a diverter. It provides easy cutting of carpet into carpet strips which can be pulled by means of clamps and winch action. During operation, the base plate capable of receiving a foot of an operator at foot area of the carpet cutting apparatus, to avoid lifting from rear portion.

A carpet pulling apparatus and system are disclosed. The apparatus comprises a base plate with a first surface and a second surface. The apparatus comprises a trolley detachably coupled with the base plate, and the trolley comprises a platform having one pair of vertical flanges, one pair of frames detachably coupled with the platform, and one pair of links coupled with the pair of vertical flanges at a first end, and with the pair of frames at a second end. The apparatus further comprises a spring-controlled lever detachably mounted to a main handle and the spring-controlled lever is configured to detach the base plate from the platform. Further, the apparatus includes a remote-controlled winch disposed over the platform, and a cable extending from a first end to a second end, the first end being received by the remote-controlled winch.

Dual-use flooring installation device with interchangeable tool-ends includes a pull bar defining a bend at a proximal end and a first connector at a distal end, the bend configured for engaging an end of a flooring material; and a wedge bar defining a wedge at a proximal end and a second connector at a distal end, the wedge configured for insertion between a wall surface or a cabinet surface and a flat material attached thereto. The device further includes a slide hammer unit comprising a hammer weight slidable about a shaft, the slide hammer unit defining an adaptor at a proximal end that is configured for removably attaching to one of the first connector of the pull bar and the second connector of the wedge bar. In a storage mode, the adaptor is disengaged from the pull bar and the wedge bar.

A walk-behind floor scraper machine for removing floor covering from a floor surface is disclosed. In one aspect, the machine includes a base frame, an electric motor secured to the base frame, and a scraper assembly movably secured to the base frame and driven by the electric motor. The machine also includes a rear wheel arrangement including a pair of wheels having a rotational axis. In one aspect, the machine includes a hydraulic circuit with a hydraulic pump driven by the electric motor and a hydraulic motor powered by the hydraulic pump. The hydraulic motor has a drive axle coupled to the wheels, wherein the drive axle is coaxially aligned with the rotational axis. In one aspect, the machine can include a hydraulic tank-frame integral to the chassis of the machine that simultaneously stores hydraulic fluid and structurally supports the hydraulic motor.

A carpet tack strip removal tool. The carpet tack strip removal tool provides a device for lifting carpet tack strips from a floor surface while remaining allowing a user to remain in a standing position. The carpet tack strip removal tool includes an elongated shaft having a head at an end. The head includes a pry bar arm for placing between the flooring surface and the tack strip to be lifted, and a fulcrum lever for providing mechanical advantage when a lifting force is applied to a lifting arm. When moved from a setup position to the lifting position, the pry bar arm lifts and removed the carpet tack strip from the floor surface.

A blade assembly for removing a membrane from a bridge deck during a road resurfacing project includes a plurality of independently mounted blades that are able to conform to the contours of a bridge deck, separate the membrane from the bridge deck, and form the separated portions of the membrane into narrow strips or rolls.

An uncoupling mat (1) includes a flexible plastic layer (2) made of a film-like plastic with structuring that defines indentations (6) provided with undercuts (5) on the first side (4) and cavities (8) positioned between the indentations (6) on the opposite second side (7). A fleece or fabric (3) is securely connected to the second side (7) and covers the cavities (8). The plastic layer (2) is provided with a plurality of weakening zones (12) which extend continuously between opposing side edges of the plastic layer (2).