Pumps – Ambulant – body supported – or with carrying handle
Patent
1997-07-09
1999-11-02
Thorpe, Timothy S.
Pumps
Ambulant, body supported, or with carrying handle
417229, 417472, 36 29, 36 35B, 36 3B, F04B 5300
Patent
active
059758619
ABSTRACT:
A pumping assembly for use in ventilating footwear includes a supporting plate having a first protrusion which is formed in a center portion of an upper surface thereof; front and rear check valves which are respectively formed forwardly and rearwardly the first protrusion portion; an exhaust pipe which is connected to the front check valve; an intake pipe which is connected to the rear check valve; a spring which has a lower end inserted into the first protrusion on the supporting plate; a curve-shaped hard plate having a second protrusion portion which is formed in a center portion of a bottom surface thereof and is inserted into an upper end of the spring; and an elastic cover which has elasticity and tensibility and covers the hard plate. The cover is bonded to the hard plate, whereby the hard plate descends in such a manner that maximum volume variation within the elastic cover can occur; when the upper rear portion of a foot pressurizes the hard plate and the elastic cover is pressed down.
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Cho Seongog
Kim Donggeon
Kim Seonjoon
Park Kwangseog
Shin Bongseop
Gartenberg Ehud
Thorpe Timothy S.
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