Sliding-wing door for vehicles

Snap lock balance shoe and system for a pivotable window

Special quiet anchor for spring fitting in counterbalancing...

Speed control for revolving door

Speed control system for a linear induction motor

Spindle door operator

Spring actuated hinge

Spring balance assembly

Spring balance assembly

Spring balance assembly

Spring balancer for a roll-up door

Spring closing device for doors or other similar structures

Spring coupler for block and tackle window balance system

Spring cover friction system for sash balance

Spring failure detection system and method

Spring hinge

Spring hinge

Spring hinge

Spring hinge

Spring hinge