Chairs and seats – Straddle seat
Patent
1988-10-03
1989-09-12
McCall, James T.
Chairs and seats
Straddle seat
248157, 2481882, 297 5, 297339, A47D 1304, B62J 100, A47C 102
Patent
active
048653829
ABSTRACT:
A surgeon's operating stool 10 is provided which is readily movable when not occupied by a person but resists undesirable movement once a person has occupied the stool 10. The stool is provided with a series of rollers 20 which normally support the stool 10 and allow for movement in any desired direction. However, the rollers 20 include a spring loaded collapsible mechanism which, when occupied by a person, forces the rollers 20 to retract into the base 12 of the stool 10 and causes a nonskin surface 38 to engage the floor. The base 12 of the stool 10 is configured to receive the feet of a person using the stool, such that a person using the stool in either a standing or sitting position forces the retracting mechanism to remain retracted and thereby prevent undesirable movement during use. The stool 10 also includes a hydraulic height adjusting mechanism which is readily adjustable via foot operation. It is of particular importance in a sterile environment that a surgeon be capable of readily adjusting the stool 10 height without use of his sterilized hands. Further, a rotary coupling 28 interconnects a seat 26 and the support rod 22 of the stool 10 such that the seat 26 is free to rotate in a plane substantially parallel to the floor.
REFERENCES:
patent: 3911509 (1975-10-01), Fleckenstein
patent: 3963096 (1976-06-01), Jones
patent: 4155423 (1979-05-01), Miller
patent: 4183579 (1980-01-01), Gonzalez
patent: 4366981 (1983-01-01), Ziegler et al.
patent: 4552404 (1985-11-01), Congleton
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