Self aligning piston rod

Details Self aligning piston rod Self aligning piston rod

1994-12-22

1996-02-06

Ryznic, John E.

Expansible chamber devices

Abutment connection between working member and power...

92143, F16J 110

Patent

active

054888964

ABSTRACT:
A power actuated door operator for opening and closing a door has a power inlet into a cylindrical body containing a power piston, a hydraulic door closer piston with a rack gear for engaging with a pinion gear for operating a door control arm, a head separating the power piston in a chamber from the hydraulic door closer piston in a hydraulic chamber, a reciprocable rod extending through an opening in the head for transmitting pushing forces between the power piston and hydraulic door closer piston, and a spring for pushing the hydraulic piston to provide closing force to the door control arm after the door has been opened by the door operator, and further has the improvement providing capability for enabling the reciprocable rod to move radially with respect to faces of the power piston and the hydraulic closer piston to accommodate misalignments between the pistons, the rod, and the opening in the head.

REFERENCES:
patent: 2675677 (1954-04-01), Aikman
patent: 2881705 (1959-04-01), Staege
patent: 3880054 (1975-04-01), Domyan

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