Resources Contact Us Home
Chair back height adjuster

Image Number 4 for United States Patent #5725278.

Disclosed is a device for positionally adjusting and releasably locking a chair backrest in any of a plurality of positions on a seat support member between two extreme positions. The device includes a first bracket adapted to be rigidly secured to the backrest and a second bracket adapted to be rigidly secured to the seat support member and slidably receiving the first bracket for sliding movement between two extreme, longitudinally spaced, first and second positions. A locking mechanism is provided for releasably locking the second bracket to the first bracket, the locking mechanism comprising a longitudinal array of lock stop members on the second bracket confronting a lock element secured to the first bracket, the lock stop members each having a locking surface. At least one longitudinal guide track is on the first bracket and defines a first longitudinal path and a second longitudinal path, the guide track having respective ends defining the first and second extreme positions and providing access points at such position between the paths to permit movement of the path tracking elements from one path to the other path. The lock element has a lock tongue for locking association with a locking surface of a selected one of the lock stop members. The lock element further has a path tracking element for sequential engagement with the first and second paths, wherein, when the path tracking element is in engagement with the first path, the lock element is forced into engagement with a selected one of the lock stop members and when the path tracking element is in engagement with the second path, the lock element is held out of engagement from all lock stop members.

  Recently Added Patents
Sampling module device and method
Dual beam dual selectable polarization antenna
Selective undo of editing operations performed on data objects
Pressure assisted variable flow clean throat aerial retardant delivery system
Transportation information systems and methods associated with degradation modes
Charging assembly with over rotation control and electrical switching apparatus employing same
  Randomly Featured Patents
Electrical connector
Housing arrangement with breakaway battery access door
Radiographic image conversion screens
Filler for polyester molding compound and method
Wall-mountable towel bar
Method and apparatus for cutting a belt-shaped member
Data processing system, and method having a server handling output request from a display terminal and forwarding access request to client system
Endotracheal cuff and technique for using the same
Combined beverage container and can cooler
Method and device intended for seismic exploration of an underwater subsurface zone using seismic receivers coupled with the water bottom