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
Motor control system, motor control device, and brushless motor
Resuming piecewise calibration of a real-time-clock unit after a measured offset that begins at the next calibration period
Gate timing for short servo wedge in disk memory systems
Tread portion of an automobile tire
Method of producing probabilities of being a template shape
Measurement and uses of oxidative status
Method and system for the assignment of security group information using a proxy
  Randomly Featured Patents
Pre-burner for low temperature turbine applications
Muteins of IFN-.beta.
Expansion card fixture
Cardiac valve with flaps pivoting on balls
Shower enclosure
Method and apparatus for performing high-speed traffic shaping
Unitary wheel and tire assembly
Power amplifier
Trash compactor with cover mounted packing blade
gC1q receptor, HIV-1 gp120 region binding thereto, and related peptides and targeting antibodies