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
Method for olympic event hospitality program management
Identification wristband
Systems and methods for building axes, co-axes and paleo-geographic coordinates related to a stratified geological volume
Image processing apparatus, image registering method, program causing computer to execute image registering method, and recording medium in which program is recorded
Signal processing device and method for providing oscillating signal in the signal processing device
Quinoline compounds and their use for treating viral infection
Vehicle having power supply apparatus
  Randomly Featured Patents
Method and system for identifying an object located among a number of multiple interconnected computing systems
Reservation of transmission bandwidth and channel reservation for IEEE 1394 bus
System and method of restarting a switched reluctance motor after a rapid cycling of power
Control handle for a material handling vehicle
Balancing bracket for fly casting tackle
Reduction of classification error rates and monitoring system using an artificial class
Wrapping control system for film wrapping machine
Output method and apparatus
Moving object detection apparatus and method
Test system and method for parallel modulation error measurement of transceivers