Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Having fluid actuator
Patent
1984-01-03
1986-03-25
Frinks, Ronald L.
Prosthesis (i.e., artificial body members), parts thereof, or ai
Having fluid actuator
623 27, 623 39, 267113, 267124, 2671401, A61F 272, A61F 274, A61F 262, F16M 100
Patent
active
045780820
ABSTRACT:
A fluid cushioning apparatus acting as a pivoting medium of two objects having a pivoting feature includes a sleeve, a shaft and a partitioning piece. The shaft has two radially enlarged annulations being closely and rotatably mounted in the sleeve and a dividing wall being axially and radially extended between the two annulations to closely engage with the interior wall of the sleeve. The sleeve is mounted on a first object and the shaft is mounted on a second object which is always to have a pivoting relationship with the first object. The partitioning piece is capable of being closely fitted among the sleeve, the shaft and the two annulations and is secured on the sleeve so that the space formed between the shaft and the sleeve is divided into two compartments. The shaft is a hollow member one end of which is mounted a replenishing cushioning fluid supplier while the other end of which is mounted a check valve and a first hole is provided on the shaft so that the liquid supplier will supply the space with new cushioning fluid through the check valve and the first hole when there is a fluid loss in the space. The shaft is further provided with a second hole to let the fluid contained in one of the two compartments flow through the first and second holes to the other one compartment when the first and second object are in relative pivoting movement to obtain a neat cushioning effect.
REFERENCES:
patent: 2421585 (1947-06-01), Thiry
patent: 2519226 (1950-08-01), Coe, Jr.
patent: 2533008 (1950-12-01), Hanson
patent: 2830301 (1958-04-01), Schober
patent: 3642268 (1972-02-01), Hipsher
patent: 4065815 (1978-01-01), Sen-Jung
patent: 4212087 (1980-07-01), Mortensen
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