Combination of a chamber and a piston, a pump, a motor, a...

Details Combination of a chamber and a piston, a pump, a motor, a... Combination of a chamber and a piston, a pump, a motor, a...

2005-12-27

2005-12-27

Lopez, F.. Daniel (Department: 3745)

Expansible chamber devices

Effective area of working member end face selectively variable

With diaphragm

Reexamination Certificate

active

06978711

ABSTRACT:
A combination of a piston and a chamber, wherein the chamber defines an elongate chamber having a longitudinal axis, the chamber having, at a first longitudinal position thereof, a first cross-sectional area thereof and, at a second longitudinal position thereof, a second cross-sectional area, the second cross-sectional area being 95% or less of the first cross-sectional area, the change in cross-section of the chamber being at least substantially continuous between the first and second longitudinal positions, the piston being adapted to adapt itself to the cross-section of the chamber when moving from the first to the second longitudinal position of the chamber. The piston may comprise an umbrella-like support structure or a fibre enforced deformable container comprising a foam or a fluid. The combination may be used in a pump, a linear actuator, a motor, or a shock absorber.

REFERENCES:
patent: 2710077 (1955-06-01), Fabel et al.
patent: 3229589 (1966-01-01), Langas
patent: 3908512 (1975-09-01), Strubin
patent: 4901828 (1990-02-01), Schmidt et al.
patent: 2023715 (1980-09-01), None
patent: 2070731 (1981-09-01), None

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