Flexible or portable closure – partition – or panel – Hanging or drape type – Chain – cable – and/or strand type
Patent
1988-01-11
1989-09-12
Johnson, Blair M.
Flexible or portable closure, partition, or panel
Hanging or drape type
Chain, cable, and/or strand type
160331, 160125, A47H 100
Patent
active
048651109
ABSTRACT:
As the land becomes more populated due to the land being subdivided into smaller tracts the need for barriers to indicate the boundaries of the individual property holdings increases. In many instances it is no longer necessary to provide a fence tight closure as was previously considered necessary to confine small animals such as chickens, pigs etc. As the cost of erecting and maintaining fence tight types of gates has increased during recent years many people have realized that all that is required is a barrier to indicate the extent of individual property holdings. I have devised a versitile type of barrier that can be manufactured economically, and can be maintained in service at low costs. All that is required is an elongated cylinder and piston rod combination, and an accordian type expandable barrier having one end operably connected adjacent the cylinder and the other end operably connected to the piston rod to move out to obstruct the accessway as the piston rod moves out in the cylinder and to retract and be bunched on the piston rod as the piston rod is retracted in the cylinder. I have devised a water pressure operated control for the gate. The valves controlling the flow of pressurized water to actuate the gate are controlled electrically. When no electric power is applied, the valves direct water under pressure to urge the piston rod outwardly in the cylinder to maintain the gate in the obstructing or closed position. When electric power is applied to reverse the position of the valves the piston rod moves inwardly in the cylinder whereupon the gate structure becomes nested on the piston rod. When the electric power is again shut off the water pressure moves the piston rod outwardly in the cylinder to position the barrier in the obstructing position.
REFERENCES:
patent: 1147944 (1915-07-01), Holdensen
patent: 1195797 (1916-08-01), Enlow
patent: 1242849 (1917-10-01), Parris
patent: 1245237 (1917-11-01), Johnston
patent: 2886105 (1959-05-01), Lee
patent: 3502132 (1970-03-01), Hager et al.
patent: 3879800 (1975-04-01), Adams
patent: 4432406 (1984-02-01), Belanger et al.
Johnson Blair M.
Wilson Alfred E.
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