Articulated joint

Details Articulated joint Articulated joint

1975-12-22

1978-03-07

Schwadron, Martin P.

Power plants

Pressure fluid source and motor

Pulsator

2 21R, 61 70, 285 11, B63C 1104

Patent

active

040772187

ABSTRACT:
A joint, subject to a pressure differential between inside and outside, having two tubular members flexibly joined by couplings comprising an annular piston sliding within an annular cylinder containing an incompressible fluid, a fluid reservoir connected to and at a higher pressure than the cylinder interior and valve means responsive to fluid loss from the cylinder allowing fluid flow from reservoir to cylinder. The valve may comprise two semi-circular arms pivoted at their ends to each other and to the piston or cylinder, the arms operating on opposite ends of a rocker plate attached centrally to a valve plunger. A differential piston maintains the high reservoir pressure. The valve is adjustable to operate at a predetermined value of cylinder fluid volume.

REFERENCES:
patent: 1821274 (1931-09-01), Plummer
patent: 1888026 (1932-11-01), Chapman
patent: 1947657 (1934-02-01), Peress
patent: 2367707 (1945-01-01), Amery
patent: 3754779 (1973-08-01), Peress
patent: 3759550 (1973-09-01), Peress
patent: 3772890 (1973-11-01), Altmeppen
patent: 3913328 (1975-10-01), Shaffer

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