Building Lifts TRIZ Cases

An override mechanism with a pulley system moves the stairlift rail during power failures, clearing doorways while keeping drive components concealed.

Coplanar pulleys with decreasing diameters reduce traction power by 4 to 6 times while eliminating lateral guide elements and abrasion.

A mounting slide with counterweight lifts an elevator drive to the shaft head ceiling, preserving car space and eliminating inclined lifting risks.

Attaching the drive motor to the car and positioning the counterweight between suspension strands reduces shaft width while maintaining symmetric ride quality.

Permanent slider bracket assembly with lateral protruding lower part prevents panel derailment in elevator door systems.

Actuator means move the carrier relative to the frame in a vertical plane for precise positioning along segmented guide rails.

A self-climbing elevator arrangement integrates machine room and car decks on guide rails to enable vertical movement during building construction.

A self-climbing elevator machine room uses hydraulic actuators to move vertically along guide rails.

An extraction-based cooling loop transfers heat from stator windings via phase transitions, reducing thermal aging without increasing machinery size.

A cabin door uses counter-shaped profiles driven by linear magnetic induction motors to slide panels between open and closed positions.

A modular stator structure uses stacked coil modules to control elevator car motion via electromagnetic propulsion.

An oblique rail strip positions a stair lift carrier near walls, reducing staircase footprint without complex reversal mechanisms.

A collapsible car apron extends to block shaft gaps while resting on elevator guide rails.

A conveyor frame integrates a movable compensation mass linked via springs to counteract structural oscillations.

A winch and cable assembly lifts heavy items along folding attic stairways, eliminating manual strain.

A lift door locking system uses sensor signals to control the locked state of the car and shaft doors.

Expandable cylinder pneumatic elevator reduces energy consumption and heat generation by eliminating fixed-volume friction through variable volume dynamics.

Segmented saddle mounts and wheeled carts stabilize hand-carryable hoists against turn over moments in confined spaces.

Continuous winch conveyor device forms the elevator car roof to transmit driving force via positive-locking traction elements.

A blocking assembly uses a translation guide and latch to secure elevator doors.

Crossing main ropes within common apertures reduces spacing, avoiding hoisting machine interference during refurbishing.

Presence sensors detect empty cabins to trigger UV-C disinfection, eliminating chemical residues and preventing human radiation exposure.

Telescopic support legs adjust the platform width and depth to match varying shaft dimensions, eliminating dismantling time and improving construction safety.

Actuated pivot panels grant maintenance access from within the car, eliminating the need for mechanics to enter the shaft.

Parallel links and sliding vanes keep the elevator car door stationary until full coupling, preventing lock hook trajectory errors.

Motorized forks traverse a toothed track to transport wheelchairs, eliminating the need for large elevators.

A seal assembly for pneumatic vacuum elevators uses U-shaped corner plates and liner plates to guide cabin movement.

Depth sensors detect spatial positions of waiting objects to group them by features, enabling automated door control that prevents unsafe mixed loading.

Cam profiles engage blocking recesses to lock pivot axes, eliminating electrical energy consumption.

A reversible door interlock uses a pivotally attached keeper and cylinder actuator to lock residential elevator doors.

Mounting sensors on the carrier improves signal-to-noise ratio, preventing oscillations in the control loop while reducing sensor costs.

A disengageable link in an elevator landing door lock assembly engages only when the car aligns with the landing.

A retractable car lift system uses a control unit to move the cabin automatically between levels with a single pulse command.

Displaceable fastening elements on a longitudinal element secure transoms to lift shafts.

A car door bolt system uses a driver element to control locking position.

Radial heat sink fins on the stator shell dissipate winding heat, resolving insufficient cooling efficiency in elevator machine systems.

Position-adjustable drive frame mounting devices enable variable support element spacing while maintaining traction and preventing reverse bending.

Distributed connecting elements join guide rails without increasing installation space, enhancing stability against bending loads.

A door sill unit uses a pivot-mounted support member to rotate between positions, enabling installation from the building landing.

Replacing precise mechanical alignment with magnetic attraction simplifies installation and reduces maintenance frequency for elevator doors.

A reduced balance elevator system uses a second pulley to maintain belt tension, preventing slippage risks while lowering energy consumption.

Linear door drive mechanisms replace heavy crank gears to reduce system complexity and maintenance.

Segmented linkages and asymmetric ratchets control door gap precision while simplifying emergency unlocking mechanisms.

A stair lift seat rotates independently from the footrest via a disconnecting coupling mechanism.

Segmented hoisting systems allow parallel guide rail and landing door installation, eliminating sequential idle time.

Independent top and bottom drive units eliminate machine room constraints while enabling larger car sizes in shared shafts.

A door coupler uses variable skid distance to generate a resultant closing force on the second door during opening.

Dynamic magnetic plates compensate for building subsidence, reducing the door gap from 30 mm to 10 mm while maintaining reliable operation.

Decoupling means with elongated mounting holes allow limited rotation, preventing jamming of the rotation blocking device caused by assembly play.

Adjustable rail sections accommodate different stair angles while a centrifugal brake engages at high speeds to ensure safe operation.