Fiberglass, reinforced concrete hose shut-off valve
AssigneeConstruction Forms, Inc.
InventorsGary D. Lehnhardt, Gordon W. Guslick, Rolando Altamirano, Gerald Biever, James H. Larson
Life of this patent
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Abstract
A shut off valve for use with a concrete delivery hose includes a single flexible cylindrical sleeve disposed within a one piece, continuous rigid casing that surrounds the hose. A gas chamber is defined between the sleeve and the casing so that when pressurized gas is forced into the chamber, the sleeve will be displaced radially inwardly to constrict the hose and stop the flow of concrete. The shut-off valve also includes a relief valve for quickly exhausting gas from the valve, and an off/on indicator for indicating open/closed positions of the valve.
Claims10
A shut-off valve for use with a concrete delivery hose whereby the flow of concrete through the hose can be controlled, the valve comprising:
- a one piece, continuous, outer substantially rigid casing dimensioned to be disposed around the concrete delivery hose;
- a single flexible cylindrical sleeve disposed within the casing and defining a gas chamber between the casing and the sleeve;
- and
- a gas port extending through the casing and into the gas chamber whereby pressurized gas can be introduced into the chamber causing the sleeve to be forced radially inwardly to constrict and close upon the delivery hose.
A shut-off valve for use with a concrete delivery hose, whereby the flow of concrete through the hose can be controlled, the valve comprising:
- an outer substantially rigid casing dimensioned to be disposed around the concrete delivery hose;
- flexible sleeve structure disposed within the casing and defining a gas chamber between the casing and the sleeve structure;
- a gas port extending through the casing and into the gas chamber whereby pressurized gas can be introduced into the chamber causing the sleeve structure to be forced radially inwardly to constrict and close upon the delivery hose;
- a relief valve connected to and in communication with the gas port for quickly exhausting gas delivered to the gas port;
- and
- an off/on indicator connected to and in communication with the gas port for indicating open and closed positions of the shut-off valve.
Dependencies are inferred from the claim text.