The invention relates to a fan unit (1) for mobile use for ventilating an area in which it is deployed, in particular for circulating fresh air in areas contaminated by smoke or gases, which comprises a main frame (2), having a lifting frame (4) mounted thereon and an axial fan (3). A first pivot arrangement (8) for the lifting frame (4) is disposed on the one hand in the region of a frame part (7) extending up from a base frame (6) and on the other hand in a first end region (14) of the lifting frame (4) facing the frame part (7). The lifting frame (4) can be adjusted in terms of its vertical distance from the base frame (6) from a non-operating position lying closer thereto into a raised deployment position. A second pivot arrangement (17) is disposed on the lifting frame (4) about which a support frame (19) is mounted so as to be pivotable in terms of its relative position with respect to the base frame (6). The axial fan (3) is retained on the lifting frame (4) with the support frame (19) connected in between.

The invention relates to a fan unit (1) for mobile use for ventilating an area in which it is deployed, in particular for circulating fresh air in areas contaminated by smoke or gases, which comprises a main frame (2), having a lifting frame (4) mounted thereon and an axial fan (3). A first pivot arrangement (8) for the lifting frame (4) is disposed on the one hand in the region of a frame part (7) extending up from a base frame (6) and on the other hand in a first end region (14) of the lifting frame (4) facing the frame part (7). The lifting frame (4) can be adjusted in terms of its vertical distance from the base frame (6) from a non-operating position lying closer thereto into a raised deployment position. A second pivot arrangement (17) is disposed on the lifting frame (4) about which a support frame (19) is mounted so as to be pivotable in terms of its relative position with respect to the base frame (6). The axial fan (3) is retained on the lifting frame (4) with the support frame (19) connected in between.

A collapsible stand mainly includes a support unit including two stand legs pivotally connected together in a crossed manner and a support arm set pivotally connected to one stand leg, a positioning unit including an abutment member and a bearing member respectively mounted at one stand leg and the support art set and so configured that when the collapsible is extended out or collapsed, the abutment member is engaged with a different part of the bearing member, and a control unit mounted at one stand leg and operable to bias the abutment member, moving the abutment member into engagement or away from the bearing member. Thus, the collapsible stand has a simple structure, facilitates operation and ensures a high level of operational safety and structural stability.

A chimney liner removal apparatus including a main chassis, a first telescoping front arm, a second telescoping front arm, a rear telescoping arm, a movable mass and an extendible excavator. The first telescoping front arm is fixedly connected to the main chassis and includes a first hollow member and a first extendible member within the first hollow member. The second telescoping front arm is fixedly connected to the main chassis and includes a second hollow member and a second extendible member within the second hollow member. The rear telescoping arm is fixedly connected to the main chassis and includes a third hollow member and a third extendible member within the third hollow member. The movable balance mass is arranged on the third hollow member. The extendible excavator assembly is pivotally connected to the main chassis opposite the rear telescoping arm.

A rotational coupling device may include a housing which may be coupled to a stationary coupler. The stationary coupler may be used to engage or couple the device to a machinery stand. A motivator shaft may be positioned on one side of the housing and a rotational drive shaft may be positioned on the other side of the housing. The motivator shaft and the rotational drive shaft may be operably connected together with a gear arrangement with rotation of the motivator shaft resulting in rotation of the rotational drive shaft that is of a reduced rate compared to the motivator shaft. The rotational drive shaft may be coupled or connected to the rotational assembly via a rotational coupler thereby allowing rotational motion provided by the motivator shaft to be transferred through the rotational drive shaft to the rotational assembly of the machinery stand to which the device is engaged.

An engine-driven working machine 10 is a generator where a working unit 15 including an engine 37 and a power generating unit 38 is housed in an outer case 12. A plurality of lower support means 25 are included in the generator 10. The lower support means 25 includes a first vibration isolating support portion 73 disposed between the working unit 15 and the outer case 12, a second vibration isolating support portion 74 formed integrally with the first vibration isolating support portion 73, and a groove portion 75 formed between the first vibration isolating support portion 73 and the second vibration isolating support portion 74. The working unit 15 is supported with the first vibration isolating support portion 73. The outer case 12 is supported with the second vibration isolating support portion 74. A fitting portion 81 of the outer case 12 is fitted to the groove portion 75.

An engine-driven working machine 10 is a generator where a working unit 15 including an engine 37 and a power generating unit 38 is housed in an outer case 12. A plurality of lower support means 25 are included in the generator 10. The lower support means 25 includes a first vibration isolating support portion 73 disposed between the working unit 15 and the outer case 12, a second vibration isolating support portion 74 formed integrally with the first vibration isolating support portion 73, and a groove portion 75 formed between the first vibration isolating support portion 73 and the second vibration isolating support portion 74. The working unit 15 is supported with the first vibration isolating support portion 73. The outer case 12 is supported with the second vibration isolating support portion 74. A fitting portion 81 of the outer case 12 is fitted to the groove portion 75.

A collapsible stand mainly includes a support unit including two stand legs pivotally connected together in a crossed manner and a support arm set pivotally connected to one stand leg, a positioning unit including an abutment member and a bearing member respectively mounted at one stand leg and the support art set and so configured that when the collapsible is extended out or collapsed, the abutment member is engaged with a different part of the bearing member, and a control unit mounted at one stand leg and operable to bias the abutment member, moving the abutment member into engagement or away from the bearing member. Thus, the collapsible stand has a simple structure, facilitates operation and ensures a high level of operational safety and structural stability.

A drive module which is a self-supporting structure being transferable and hoistable as an integral entity. The drive module includes a self-supporting framework having a shape of a rectangular parallelepiped. The self-supporting framework defines an inner space within the self-supporting framework. The drive module also includes at least two drive units. The drive units are supported to the self-supporting framework in the inner space of the self-supporting framework. The drive units are connectable to an external rotatable shaft for the rotation of the rotatable shaft located outside the drive module.

The present invention provides support frames for positive pressure blowers having one or more wheels mounted at a lower corner of the frame, wherein the wheels are mounted to roll in a direction that is perpendicular to the flow of air through the blower. This sideways orientation of the wheels allows a frame carrying a blower to be easily moved from side to side, such as when placed into or removed from a side compartment on an emergency vehicle, and allows such a frame carrying a blower to be easily tilted, turned and rolled around at the scene of a fire in much the same manner as a wheelbarrow. Embodiments of the invention may include an upper handle or grip which allows a user to control the frames by tilting and rolling them around on the wheels. Embodiments of the invention may include a support bracket for holding a battery or other power supply.