An easily attachable and removable self-contained slide in storage, safety and warning light chassis assembly for use by the traffic control industry and others is described. The chassis assembly includes a bed portion that is built to slide into a pickup truck bed. Associated removable jacks can be used to raise and support the chassis while a truck is backed up under it, or where the jacks include castors, the assembly is rolled into the truck. Additionally, a safety platform portion is included on the rear portion of the chassis assembly, so that when installed it is disposed behind the bed of the truck for use in the placement and pickup of traffic control devises. The chassis assembly can be mounted securely to the factory hitch of truck as well as additional locations in the bed.

An aircraft lifting assembly includes a jack, a load cell, and a jack adapter. The jack includes an extendable arm having a distal end portion for exerting a force to lift an object. The distal end portion defines a cavity. The jack adapter couples the extendable arm to the load cell and includes a base portion, a cradle portion, and a projection. The base portion defines a jack arm support surface and a load cell support surface. The jack arm support surface opposes the distal end portion of the extendable arm and the load cell support surface opposes the load cell. The cradle portion extends from the base portion to circumscribe a portion of the load cell to secure the jack adapter to the load cell. The projection extends from the base portion into the cavity to secure the jack adapter to the extendable arm of the jack.

A hydraulic lifting device for a chassis of a mobile device has a valve block, a pump, a tank, a first cylinder device and a second cylinder device. The first cylinder device and the second cylinder device can be selectively pressurized by the pump or connected to tank via the valve block. The first cylinder device is connected to the pump via at least one primary non-return valve disposed in the valve block. The second cylinder device is connected to the pump via at least one secondary non-return valve disposed in the valve block. The valve block has at least one pressure accumulator downstream of the at least one secondary non-return valve in the flow direction from the pump to the second cylinder device. Furthermore, a chassis with such a lifting device and to a mobile device with a chassis is provided.

A hydraulic lifting device for a chassis of a mobile device has a valve block, a pump, a tank, a first cylinder device and a second cylinder device. The first cylinder device and the second cylinder device can be selectively pressurized by the pump or connected to tank via the valve block. The first cylinder device is connected to the pump via at least one primary non-return valve disposed in the valve block. The second cylinder device is connected to the pump via at least one secondary non-return valve disposed in the valve block. The valve block has at least one pressure accumulator downstream of the at least one secondary non-return valve in the flow direction from the pump to the second cylinder device. Furthermore, a chassis with such a lifting device and to a mobile device with a chassis is provided.

A building structure includes a core extending upright through and supporting the weight of one or more stories of the building structure, each story including one or more floor units, at least one story forming an outer peripheral portion, and an inner support portion through which the story is supported by the core via an interface along the perimeter of the core, wherein the horizontal cross-section of the core has a substantially circular external perimeter at the level of the interface, the interface and the inner support portion of the story, wherein at least one story is stiffened by a space frame extending from the inner support portion to the outer peripheral portion and making the story a self-supporting rigid body cantilevered off the core and structurally independent of all other stories, wherein the story transmits gravity-induced loads to the core via the interface only by means of vertical forces.

A foundation lifting method includes the steps of cutting an existing concrete pile below the building foundation, inserting two sleeve portions over ends of the cut pile, placing a lifting device, such as a jack, between the ends of the cut pile and jacking vertically within the cut out section, and then fixing the two sleeve portions to reinforce the cut area. The method can be performed simultaneously or consecutively on plural existing concrete piles below the building foundation. The sleeve portion couples the lower pile portion with the upper pile portion to resist vertical and transverse loads. A computerized interface can coordinate the actuation scheme for multiple piles.

A system and method for leveling a selected surface of a structure. The system includes a handheld mobile device and a platform leveling assembly (PLA) supportable on a structure to be leveled. The PLA includes a PLA controller and a PLA receiver communicatively coupled with the PLA controller. The handheld mobile device includes a tilt sensor configured to sense an attitude of a selected surface on which the handheld mobile device is placed; and a mobile device controller communicatively coupled to the tilt sensor and the transmitter and configured to receive signals from the tilt sensor indicating the attitude of the selected surface on which the handheld mobile device is placed.

A linear jack includes an outer tube, a high speed assembly comprising a first rotating member threadedly coupled to a first translating member, a low speed assembly comprising a second rotating member threadedly coupled to a second translating member, wherein the low speed assembly is coupled to and translates with the first translating member. At least a portion of the high speed assembly is slidable in the outer tube between a first position, wherein the high speed assembly is engaged with a shaft, and a second position, wherein the high speed assembly is disengaged from the shaft. A thread pitch of the high speed assembly is greater than a thread pitch of the low speed assembly.

A lifting device and to a lifting platform for lifting and lowering vehicles or loads, with a base body and with a support moveable up and down relative to the base body, with a drive device for lifting and lowering the support, wherein a guide is provided on the support, which guide is fixedly connected to the support, and the guide has at least one support arm which is mounted at least on one side so as to be extendable in the horizontal direction through the guide.

A lifting device and to a lifting platform for lifting and lowering vehicles or loads, with a base body and with a support moveable up and down relative to the base body, with a drive device for lifting and lowering the support, wherein a guide is provided on the support, which guide is fixedly connected to the support, and the guide has at least one support arm which is mounted at least on one side so as to be extendable in the horizontal direction through the guide.