A - Human Necessities – 47 – C
Patent
A - Human Necessities
47
C
A47C 7/00 (2006.01) A47C 1/027 (2006.01) F16H 25/24 (2006.01)
Patent
CA 2138364
A jerk arresting mechanism for use particularly to prevent adjustable chair back rests from jerking forwardly. A shaft extends through a housing and has a nut assembled to it within the housing. The nut has limited axial movement into a locking position and is normally held out of the locking position by a spring. When the chair back moves forwards without a jerking motion the shaft moves axially and relative to the housing, rotation of the nut upon the shaft allowing for shaft movement with the nut held out of the locking position. However should the back rest jerk forwardly the shaft moves faster thereby overcoming the spring bias to move the nut into the locking position. In the locking position, circumferentially facing stop surfaces of the nut and the inside of the housing interengage to prevent nut rotation and thereby prevent further axial movement of the shaft in the jerking direction. The stop surfaces may be provided upon confronting ends of the nut and of an inwards extension of a housing. Alternatively, the nut extends within the extension and confronting circumferential surfaces of the extension and nut provide the stop surfaces. Guide surfaces may be provided to guide the stop surfaces together by slight nut rotation.
Adams Patent & Trademark Agency
Sifa Sitzfabrik Gmbh
LandOfFree
Jerk arresting mechanism does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Jerk arresting mechanism, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Jerk arresting mechanism will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1630581