Supports – Stand – Standard type
Patent
1983-02-10
1984-10-30
Foss, J. Franklin
Supports
Stand
Standard type
297345, F16M 1100
Patent
active
044796277
ABSTRACT:
A chair height adjustment mechanism selectively positions a seat section relative to a base and is situated between a barrel attached to the chair base and a threaded spindle extending downwardly from the seat section and telescopically received within the barrel. The adjustment mechanism includes an adjusting nut assembly receiving the spindle and extending between the barrel and spindle. A spring urges the nut assembly toward engagement with a detent member connected to the barrel. When the seat section is occupied, the spring is compressed and the nut disengages from the detent member, and the spindle and nut rotate together as the seat section swivels. When the seat section is unoccupied, the spring urges the nut into interlocking engagement with the detent member, and the spindle rotates relative to the nut as the seat section swivels in order to cause the seat section and spindle to adjust upwardly and downwardly depending on the direction of seat rotation relative to the base and barrel.
REFERENCES:
patent: 325044 (1885-08-01), Blackburn
patent: 699889 (1902-05-01), Morsell
patent: 1041701 (1912-10-01), Thornley
patent: 1184483 (1916-05-01), Morsell
patent: 1207412 (1916-12-01), Keeney
patent: 2388056 (1945-10-01), Hendricks
patent: 2702075 (1955-02-01), Richards
patent: 2704113 (1955-03-01), McKinley
patent: 2764223 (1956-09-01), Mischke
patent: 3164357 (1965-01-01), Hage et al.
patent: 3169744 (1965-02-01), Mocek et al.
patent: 3227113 (1966-01-01), Kupski
patent: 3327985 (1967-06-01), Levit et al.
patent: 3534937 (1970-10-01), Heinzel
patent: 3599924 (1971-08-01), Schmidgall
patent: 3606234 (1971-09-01), Prescott
patent: 3642088 (1972-02-01), Snath
patent: 3727871 (1973-04-01), Harper
patent: 3870271 (1975-03-01), Bowman
patent: 3991965 (1976-11-01), Westover et al.
patent: 4026509 (1977-05-01), Wolters
patent: 4181280 (1980-01-01), Bowman
patent: 4285488 (1981-08-01), Hancock
patent: 4324382 (1982-04-01), Beukema et al.
patent: 4394001 (1983-07-01), Wisniewski
Cramer Inc.
Foss J. Franklin
LandOfFree
Chair height adjustment 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 Chair height adjustment mechanism, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Chair height adjustment mechanism will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1099347