Vacuum pump with shock absorption and controlled rotation...

Details Vacuum pump with shock absorption and controlled rotation... Vacuum pump with shock absorption and controlled rotation...

2005-04-22

2010-06-29

Snow, Bruce E (Department: 3738)

Prosthesis (i.e., artificial body members), parts thereof, or ai

Leg

Socket holder

C623S035000, C623S036000

Reexamination Certificate

active

07744653

ABSTRACT:
A vacuum pump having shock absorption and controlled rotation for use in an artificial limb. The pump includes a housing having a first chamber, and a shaft configured to be received by and to reciprocate within the first chamber, the housing and shaft forming a pump chamber. A piston may be coupled to the shaft and positioned within the pump chamber, and intake and exhaust ports are fluidly coupled to the pump chamber. Rotational structure is mounted with respect to the pump to provide controlled rotation of the shaft relative to the housing, and shock absorption structure is included within the pump to provide shock absorption for the shaft. Both a pneumatic spring and a mechanical spring element may be provided for the shock absorption structure. An optional adapter couples the shaft to the pylon of an integral pylon prosthetic foot.

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Product Information: Otto Bock Delta Twist Shock Absorber, printed Apr. 22, 2004, 2 pages.
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Goswami, J. et al., “Walking in a vacuum-assisted socket shifts the stump fluid balance”,Prosthetics and Orthotics International, 2003,23,pp. 107-113.

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