Hydraulically controlled pneumatic swinging door operator

Details Hydraulically controlled pneumatic swinging door operator Hydraulically controlled pneumatic swinging door operator

1974-11-18

1976-03-02

Downey, Kenneth

Movable or removable closures

Unitary or interrelated fluid operator and closure check

49265, 49334, 91394, 92 9, 92131, 92137, E05F 1502

Patent

active

039408876

ABSTRACT:
A hydraulically controlled pneumatic swinging door operator comprising a pneumatic cylinder with a piston therein, a continuous loop connected to opposite sides of the piston and entrained at its ends over sprockets, one of which makes driving or driven connection with a door, a passive hydraulic system including a cylinder and a piston, the piston of which is carried by the side of the loop opposite the side carrying the pneumatic piston, and passage work in the hydraulic system for controlling the flow of hydraulic fluid in said cylinder from one side of the hydraulic piston to the other side.

REFERENCES:
patent: 2489911 (1949-11-01), Lifner
patent: 2618365 (1952-11-01), Seagren
patent: 3864875 (1975-02-01), Hewitt

Affiliated with

Also associated with

Rating

Hydraulically controlled pneumatic swinging door operator does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Hydraulically controlled pneumatic swinging door operator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydraulically controlled pneumatic swinging door operator will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1270155