A - Human Necessities – 47 – C
Patent
A - Human Necessities
47
C
155/22.3
A47C 3/02 (2006.01) A47C 1/024 (2006.01) A47C 1/032 (2006.01)
Patent
CA 1253067
ABSTRACT An adjusting mechanism used for exerting a force on two parts movable relative to one another and has a cylinder, a piston and a piston rod. On the piston there is also provided a guide rod, which is guided in a guide connection of a bottom cylinder casting. A control piston is displaceably guided in a longitudinal bore of the piston in a further longitudinal bore of the guide rod. The piston contains ducts which are either interrupted by the control piston or are freed by a smaller diameter portion of the control piston. The inner cylinder chamber is completely filled with a flowable or fluid grease. As a result, the piston rod can be locked in position by blocking ducts and on releasing the latter can be moved. The locking of the adjusting mechanism in a specific position, as is particularly required in the case of tiltable chairs, is consequently facilitated compared with known mechanisms and in addition through the use of the flowable grease, the sealing of the adjusting mechanism is made simpler
494816
Locher Hermann
Perley-Robertson Hill & Mcdougall Llp
LandOfFree
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