Abstract: A carpentry block is provided to support a remote end of a board or work piece to be cut with a table saw or chop saw. The block has a triangular body which can be positioned on any base to define three different heights to support the remote work piece end. The block can also be positioned on the one end to define a fourth height for work piece support. An extension member can be added to the block to provide additional heights with the block, the outer end of the work piece is level with the saw table, thereby assuring an accurate cut of the work piece by the saw blade.

Abstract: Mounting blocks for attaching reducing elements to a rotary drum of a comminuting apparatus are disclosed. The mounting blocks may be mounted in multiple positions to vary the bite of the reducing elements of the rotary drum.

Abstract: Embodiments of the present invention are generally related to a multi-sided ladder assembly and methods of utilizing the same. More specifically, embodiments of the present invention relate to a multi-sided ladder assembly with substantially improved stability, providing for a wide range of applications. In one embodiment of the present invention, a multi-faced ladder assembly comprises: a plurality of individual ladders, a top platform positioned over a top of each of the plurality of ladders, and a plurality of support platforms, each support platform positioned at a bottom end of each of the individual ladders.

Abstract: A two-part roof hook is described, which has a base part (1) and a hook part (2) which can be connected to the base part (1) and which has a connecting element (6) on its end (4) for mounting an assembly. The base part (1) is a cut-off portion (X) of an angle section, one angle leg (8) of which is provided with connecting elements (7) for making a connection to the roof substructure. A section wall (10) extending in the longitudinal direction of the section is arranged within the angle between the two angle legs (8, 9), which section wall includes an obtuse angle (?) jointly with the angle leg area of the connecting elements (7), serves as a support surface for the end (3) of the hook part (2), and can be connected to the end (3) of the hook part (2).

Abstract: A system of increased safety when performing work using a ladder is described. The system includes a ladder bracket for temporarily attachment of a ladder to a structure to stabilize or secure the ladder. The bracket is easy to install and acts to limit or prevent slippage of the ladder laterally or away from the structure and generally promotes a greater margin of safety. In addition, the system includes a bracket for temporarily, yet securely, attaching a safety railing to a ladder. A guardrail carriage for securing a person to a rail via a tether is further provided.

Abstract: A dual-use ladder and bridge modular system preferably includes tubes, gussets, flanges, and/or joints. In a preferred embodiment, the tubes, gussets, flanges, and/or joints are made of carbon fiber. A method connects and disconnects modular carbon fiber ladder segments. Another method creates a lightweight carbon-fiber beam with exceptionally high stiffness and strength using a combination of carbon-fiber braid material, uni-directional cloth, and pultruded carbon-fiber strips. A carbon fiber ladder segment and tube connectors are also disclosed.

Abstract: A scaffold including a right end frame access ladder having a right rail and a left rail in spaced relation with the right rail, and a plurality of horizontals attached to the right rail and the left rail. The scaffold includes a left end frame access ladder having a right rail and a left rail in spaced relation with the right rail, and a plurality of horizontals attached to the right rail and left rail. The scaffold includes a first adjustable platform support truss attached to the right end frame access ladder and the second end frame access ladder. The scaffold includes a second adjustable platform support truss attached to the right end frame access ladder and the second end frame access ladder and essentially in parallel and spaced relation with the first adjustable platform support truss. The scaffold includes a removable support having a first bracket, a second bracket and a center portion connected to the first and second brackets.

Abstract: A telescoping ladder jack supports a scaffolding plank and comprises a main member. A telescoping beam includes longitudinally spaced holes on each side of the telescoping beam and is inserted into or extracted from the main member. A locking mechanism is mounted to the main member and inserted into one of the holes to fix the telescoping beam at a desired length extracted from the main member. Ladder rung hooks are attached to a first bracket, which receives and is pivotally attached to the main member and has one of the hooks attached to each opposing end of the first bracket. A device for adjusting incline includes a second bracket mounted to a bottom of the main member (the second bracket including at least one series of recessed locking joints) and a bracing arm movably fastened to the second bracket by a locking pin oriented through a first end of the bracing arm and pivotally mounted to the first bracket at a second end of the bracing arm.

Abstract: A system of increased safety when performing work using a ladder is described. The system includes a ladder bracket for temporarily attachment of a ladder to a structure to stabilize or secure the ladder. The bracket is easy to install and acts to limit or prevent slippage of the ladder laterally or away from the structure and generally promotes a greater margin of safety. In addition, the system includes a bracket for temporarily, yet securely, attaching a safety railing to a ladder.

Abstract: A ladder platform and safety rail device is provided for mounting on one or more ladders and includes a U-shaped bracket with an insert leg for extending through a hollow ladder rung. The bracket also includes a rail leg, which is releasably connected to a rail. The bracket legs extend through a bracket leg plate, which secures their ends together with the device mounted on one or more ladders. A working deck is formed by a plank supported on a ladder jack attached to each ladder. A rail support strut extends between the rail and the plank.

Abstract: An improved ladder-supported scaffolding technique and system using a pair of horizontally spaced vertical ladders for supporting staging planks therebetween and held vertically and rigidly by top brackets parallely in front of, along, and spaced from a building structure, and having adjustable brackets attachable to intermediate ladder rungs with staging plank-supporting legs perpendicularly extending toward or away from the building structure.

Abstract: A mounting system mounts a work platform to a ladder that includes a plurality of rungs, such that the work platform is elevated a distance above the ground. The mounting system includes a support system, a rod, and a suspension mount. The support system includes a plurality of members, wherein the members include at least a first member and a second member. The first member is mounted substantially perpendicularly to the second member and includes a first end and a second end. The first member first and second ends include a plurality of first openings that extend therethrough. The second member is configured to attach to the work platform, and includes a first end and a second end. The second member first and second ends include a plurality of second openings that extend therethrough. The support system is configured to attach to the ladder. The rod is configured to secure the support system to the ladder, and is further configured to extend through one of the ladder rungs.

Abstract: A worker back support which is laterally and slidably attached to a scaffold plank. The back support has a grip which is releasably attached about the waist of the worker. The back support provides the worker with backward support and a safe attachment to the scaffold. A high pressure hose used for washing or sand blasting a wall surface may be attached to and braced by the back support, thereby reducing the working pressure on a worker.

Abstract: An improved ladder-supported scaffolding technique and system using a pair of horizontally spaced vertical ladders for supporting staging planks therebetween and held vertically and rigidly by top brackets parallely in front of, along, and spaced from a building structure, and having adjustable brackets attachable to intermediate ladder rungs with staging plank-supporting legs perpendicularly extending toward or away from the building structure.

Abstract: Raisable and lowerable platforms for use with ladders that are laid against exterior and interior walls, and against other inclined surfaces such as pitched roof surfaces. Two or more ladders can each include the platforms which are controlled by motors to raise and lower in unison. The platforms can be attached by rollers about exterior sides of the ladders or on the interior sides of the ladders, as needed. Single, two, or more ladder applications can include platforms being expandable to have enlarged surfaces. A longitudinal member such as a board, deck, etc., can also be positioned on the platform(s) so it can be used as a raisable and lowerable scaffolding system.

Abstract: A mounting system mounts a work platform to a ladder that includes a plurality of rungs, such that the work platform is elevated a distance above the ground. The mounting system includes a support system, a rod, and a suspension mount. The support system includes a plurality of members, wherein the members include at least a first member and a second member. The first member is mounted substantially perpendicularly to the second member and includes a first end and a second end. The first member first and second ends include a plurality of first openings that extend therethrough. The second member is configured to attach to the work platform, and includes a first end and a second end. The second member first and second ends include a plurality of second openings that extend therethrough. The support system is configured to attach to the ladder. The rod is configured to secure the support system to the ladder, and is further configured to extend through one of the ladder rungs.

Abstract: A mounting system for mounting a work platform to a ladder includes a support system, a rod, and a suspension mount. The support system includes a plurality of members which attach to the work platform and attach to the ladder. The rod is configured to attach the support system to the ladder and is further configured to extend through one of the ladder rungs. The suspension mount attaches to the support system and includes a locking mechanism, a hook assembly, and an adjustable telescoping member. The hook assembly fits over and around the ladder rung.

Abstract: The ladder scaffold assembly of the present invention for releasable mounting on two spaced apart ladders placed side by side comprises a scaffold platform having opposing first and second lateral ends and a ladder attachment bracket disposed on the opposing ends of the platform for supporting the platform in an elevated horizontal position intermediate two spaced apart ladders. Step engagement means are disposed on each ladder attachment bracket, wherein the step engagement means comprise an upward sloping surface to releasably engage and securely hook onto a step from underneath the step. The step engagement means is rigidly attached to the ladder attachment bracket and is incapable of independent movement in relation to the platform. The upward sloping surface permits releasable engagement to a step that may comprise a step of a step ladder or adjacent side by side rungs of an extension ladder.

Abstract: A ladder scaffold is suspended from rods inserted through the hollow rungs of a ladder. The ladder scaffold includes at least two ladders, at least two platform braces, and a platform. Each platform brace has three rods, two long members, and two short members. Two of the rods are inserted through the hollow rungs of a ladder. The long members are attached to the ends of one of the rods and extend downwards from the ladder. The short members are attached to the ends of the second rod. The short members extend horizontally from the ladder towards the surface against which the ladders are leaning. The third rod serves as a pivot point between the long members and the short members. The platform is supported by the short members and extends between the ladders. The long and short members can be attached to the rods at various points, so that the platform can be leveled. The ladder scaffold folds for easy transport. The ladder scaffold may or may not include a safety bar.

Abstract: The multi-purpose Combo Jack.TM. tool combines the functions of a ladder jack, a roof bracket and a roof hooks into one piece of equipment. There are a pair of hooks attached to a rail supporting arm which is pivotably connected to a bracket body arm. The bracket body arm includes the plank stop lever and a retractable nailing blade. A combination support arm is connected to the rail support arm at either the tri-function setting or the steep roof bracket setting, and is also connected to the upward or downward slots in the bracket body arm (or at the end but not in a slot). The tool includes a safety stop as part of the retractable nailing blade, a ladder lock, and a safety protrusion to prevent collapse of the tool because of slippage along the bracket body arm by the combination support arm.

Abstract: A ladder support device is secured to a scaffold by two base arms. At one end of the base arms the device forms a "channel" in which the ladder can move vertically but not horizontally. This secures the ladder so that it cannot fall away from the scaffold or to either side. In addition, it allows the scaffold to be raised or lowered without having to detach the ladder from the scaffold.

Abstract: Safety scaffold or platform foldable structures for ladders are disclosed. The scaffold structure embodies an elongated expandable scaffold floor section which is removably connected to two spaced apart upstanding ladders. Male and female floor sections are expanded to the desired length and locked in place by a locking pin. Spaced apart double hook hinges are releasably secured to one rung on each ladder. Wedge mechanisms work in conjunction with the hook hinges engaging the ladder rails to secure the scaffold structure in the horizontal open working position. The platform structure in the form of the letter H is removably connected to two adjacent rungs of a single ladder. The pair of hook arms hook around the upper rung and a pair of bottom arms support the structure on the lower rung. Descending wedge mechanisms engage the ladder rails in supporting the platform structure in the horizontal open working position.

Abstract: A ladder support bracket for staging in which a pair of ladders are supported in a vertical position spaced from a wall and having a staging element supported by the ladder rungs. The support bracket is a rigid A-frame and the ladder is tightly clamped between the apex portion of the frame and the crossbar.

Abstract: A scaffold support comprises a beam fabricated in the form of a rectangular steel tube having width less than its height, and a pair of legs each fabricated in the form of a rectangular steel tube. The legs are welded to opposite sides of the beam so as to diverge from one another at an acute angel and so as to angle outward and downward from the beam at an acute angle from the vertical when the beam is oriented horizontally. An angle bar welded to each leg and extending between the legs to stabilize the legs and to provide a step. A steel scaffolding retainer welded to an outer end of the beam and extended above a top edge of said the so as to prevent scaffolding from moving beyond the outer end, and a steel mounting plate is welded to an inner end of the beam so as to provide a bearing surface for the inner end.

Abstract: A scaffold jig including a first T-bar that has a first horizontal bar with a first vertical bar extending therefrom. The first vertical bar has a plurality of adjustment holes. Also included is a second T-bar that has a first horizontal U-iron with a second vertical bar extending therefrom. The first U-iron has an opening passing therethrough. The second vertical bar has a bracket with a bracket opening projecting therefrom. The second vertical bar receives the first vertical bar therein to form a support bar. Included is a third T-bar that has a second horizontal U-iron with a third vertical bar extending therefrom. The second U-iron has an opening therethrough and is supported by a step of a ladder. Lastly, a straight bar is included that has a first end positioned between the support bracket, and a second end positioned within the third vertical bar, and a plurality of adjustment holes. The straight bar forms a support brace to support the support bar.

Abstract: A portable telescoping platform system. The platform system includes a plurality of telescoping poles, each pole having a removable lower bracket and a removable upper bracket. A plurality of legs extend from each telescoping pole, each leg extending in angular relation to the telescoping pole. A plurality of braces are provided with each brace extending between pairs of adjacent upper brackets. A platform is supported by and on the braces.

Abstract: A system for servicing and maintaining an aircraft includes a fuselage dock assembly having a first ground-supported column, a second ground-supported column and a walkway section supported by the first and second columns. The system also includes a tail dock assembly having a recess defined therein for receiving a tail section of an aircraft, and an engine stand for servicing an engine of the aircraft that is not readily accessible from the fuselage dock assembly or the tail dock assembly. Structure is also provided for adjusting the height and inclination of the walkway section relative to a horizontal plane, so that the walkway section will conform to the natural inclination of a particular aircraft. The system includes serveral other novel and advantageous features for increasing the safety and efficiency of aircraft maintenance.

Abstract: A scaffold bracket for mounting on a ladder. The bracket comprises at least two legs, which are connected at one end to define a junction, said legs divergingly extending from the junction to their free ends. A plurality of first rung engaging members are distributed along the legs from their free ends and terminate short of the junction. A link is attached at the junction and terminates in a second rung engaging member. The bracket is so constructed and arranged that the legs are placed over a selected rung of the ladder and are engaged thereon by engagement of a first rung engaging member, the second rung engaging member is engaged over an upper located rung, a second bracket is similarly mounted on a second ladder placed side by side relative to the first ladder, and a wood plank is placed on the two brackets to constitute a scaffold.

Abstract: A pair of attachments for use with ladders constructed with hollow rungs to stabilize the ladder and to protect the gutter. These attachments when used with ladders also provide for a scaffold plank. The attachments when used with a ladder on a pitched roof allows the ladder to be used to access that roofs peak. Previously the ladder would rest on the rain gutter when the user was to access the roof of a building. Previously a work platform had to be built from wood or metal resulting in time consuming construction. Previously when accessing the roof peak of a building a means of providing a positive foothold had to be constructed from rope and ladder or from wood. The present invention provides steel flat bars bent to fit the rung spacing of the ladder with a steel tube welded at each end sized to fit snuggly into the opening of any two consecutive rungs in that ladder. The ladder can now be used to access the roof of a building without resting on the gutter.

Abstract: A wall scaffold using a pair of ladders equipped with ladder jacks for supporting a horizontal work platform. The invention includes numerous safety features such as a safety railing on standards attached to the outboard ends of the ladder jacks, a paint bucket trolley for the railing, an adjustable anti-flexing brace between the central part of the ladder and the wall to prevent bouncing of the ladder and platform, a unique safety clamp for tightly securing components to the ladder rungs, a ladder level adjuster, an auxiliary step to assist in mounting and dismounting the work platform, and a safety stake attachable to the lowest ladder rung to prevent bottom "slip-out".

Abstract: A firefighting roof ladder accessory that is designed to be supported between two roof ladders. The accessory comprises a beam, having two foot supprot surfaces that are perpendicular to each other, and end boxes each extending over a ladder rail and provided at its outer edge with hooks that go over the rungs of the roof ladders.

Abstract: A firefighters' roof scaffolding is disclosed which is used by firefighters for standing upon the roof of a burning building in order to make a ventilation hole in the roof for ventilating the gases, and the like, from the interior of the building. The scaffolding has a cross beam of hollow construction, which mounts at one end a ladder attaching device to attach one end of the cross beam between two adjacent rungs of a conventional roof ladder suspended from the peak of the roof. The other end of the cross beam is provided with a roof attaching device for suspending that end from the roof itself. Each of the ladder attaching device and roof attaching device is secured to a respective end of the cross beam by a mounting block, which is juxtaposed adjacent a mounting plate positioned in the hollow interior of the respective end of the cross beam.

Abstract: A work supporting and holding stackable step stool is formed of plastic material, and includes a plurality of vertical and horizontal apertures provided in the step stool body sides for supporting and holding lumber material therewith for providing low and medium height scaffolding, as well as for securely retaining lumber material to be cut, drilled, sanded and the like. Further holes are provided in each step stool for securely holding tubing or pipe to be worked upon. Planar support surfaces provide a user with both steps as well as work supporting surfaces and each step is provided with a shallow V-shaped recess for holding material of round configuration during work thereupon. A raised lip on the upper step on one edge thereof provided with measuring indicia can be used for measuring material to be cut, drilled, and the like. Electric power outlet receptacle structure, a storage box, a pencil sharpener and nail suspension apertures are additional features of the present step stool arrangement.

Abstract: In the art of scaffolding, temporarily utilizing elevated planks, stages or platforms for supporting workmen and materials through use of two or more leaning ladders, a compact ladder jack has a tubular, scaffold-supporting arm for storing a suspension chain when not in use. The arm hooks over a ladder rung and the chain is looped over a higher rung. The chain has a snap hook for receiving a preselected chain link to permit mounting of the jack in a position where the arm is disposed horizontally to accommodate variances in ladder inclinations. A latch on the arm guards against accidental displacement of the hook end of the arm from the lower rung.

Abstract: A scaffold assembly including a ladder unit having an outside vertical member with a hollow top end and bottom end, an inside vertical member connected to the outside vertical member by horizontal steps, the top step and the bottom step having a hollow end adjacent to the point at which they are connected to the inside vertical member, the hollow top end and bottom end of the outside vertical member being adapted for connecting to another ladder unit by placing a pin in the hollow portions of the two vertical ladder units, the ladder unit being adapted for joining side by side to another ladder unit by placing a horizontal joining member in the open ends of the top and bottom steps to join the two ladder units horizontally side by side.

Abstract: A track supported mobile ladder-scaffolding system with self-adjusting lateral supporting structure at the top for engaging a roof by means of a vehicle which engages track structure attachable to a roof by clamping: safety hook structure prevents support failure at the top at roof-engaging and ladder engaging points of the mobile portion of the system.

Abstract: A strong lightweight hanging scaffold for four or more workmen with heavy materials has a wide range of adjustability adapting it for a variety of uses on many types of one and two story buildings including buildings with gable ends. The scaffold features strong top and bottom truss arms or beams which are vertically adjustable on end vertical ladder-type frames. A sturdy walkway of box form has a non-slip metal walking surface and may be employed in both level and inclined positions while resting on the bottom truss arms. Top spiked engaging bars of the upper truss arms have swiveled connections therewith so as to be compatible with various roof contours. The lower truss arms have extension bars with feet adapted for stable engagement with building walls.

Abstract: A portable collapsible scaffold structure is adapted to be supported in use upon and transported by a truck or other self-powered ground vehicle, and includes a pair of extensible ladders adapted to be mounted in use adjacent to the vehicle and coupled thereto by extensible support means for raising and lowering the ladders simultaneously, the ladders supporting between their upper ends a work platform. Extensible support posts support the ladders intermediate the ends thereof and are coupled to extensible carriage means which support the lower ends of the ladders for movement along the ground or other support surface during raising and lowering of the ladders. The entire structure is hydraulically operated and control means coupled to the ladders and the platform maintain the platform substantially horizontal during raising and lowering of the ladders. The entire scaffold structure can be readily disassembled and stored on the associated vehicle for transportation thereby.