Dehider regulator valve
AssigneeJarvis Products Corporation
InventorTimothy Grinaski
Life of this patent
Estimating the term…
Abstract
An air pressure regulator for a dehider includes a valve to open and close the flow of pressurized air in an air inlet, a first spring urging the valve in the direction of air flow through the inlet to close the valve, a plunger operable to move the valve from a closed to an open position against the direction of air flow, a piston connected to the valve exposed to the air flow, and a second spring between the piston and the plunger. Upon depressing the plunger, the second spring urges the piston to open the valve against the air flow direction to permit pressurized air to flow through the regulator. The maximum allowable air pressure through the regulator is determined by spring forces of the first and second springs and resistance of the piston to the flow of air through the valve.
Claims20
A handheld dehider comprising:
- a housing;
- a pneumatic motor having an air inlet in the housing for providing a flow of pressurized air to the motor;
- a pair of cutting disks mounted in the housing, the cutting disks driven by the pneumatic motor;
- a speed governor in the housing between the air inlet and the motor, the speed governor controlling the flow of pressurized air from the air inlet to the motor;
- and
- an air pressure regulator disposed along the air inlet, the regulator having a valve to open and close flow of pressurized air in the air inlet, a first spring urging the valve in the direction of air flow through the inlet to close the valve, a plunger or other switch mechanism operable to move the valve from a closed to an open position against the direction of air flow in the air inlet, a piston connected to the valve on one side and exposed to flow of air through the air inlet, and a second spring disposed between the piston and the plunger,
- whereby upon depressing the plunger or otherwise operating the switch mechanism the second spring urges the piston to open the valve against the air flow direction to permit pressurized air to flow through the regulator and on to the speed governor and the motor, and
- wherein during operation the sum of spring force of the first spring and force exerted on the piston by flow of air through the valve is continuously offset by force of the second spring to maintain the degree of opening of the valve and wherein maximum pressure of the air through the regulator and subsequently through the speed governor is determined by spring forces of solely the first and second springs and resistance of the piston to flow of air through the valve.
(canceled)
A method of regulating air pressure to a pneumatic motor comprising:
- providing an air pressure regulator disposed along an air inlet to the motor, the regulator having a valve to open and close flow of pressurized air in the air inlet, a first spring urging the valve in the direction of air flow through the inlet to close the valve, a switch operable to move the valve from a closed to an open position against the direction of air flow in the air inlet, a piston connected to the valve on one side and exposed to flow of air through the air inlet, and a second spring disposed between the piston and the plunger;
- and
- operating the switch to cause the second spring to urge the piston to open the valve against the air flow direction to permit pressurized air to flow through the regulator and on to the speed governor and the motor,
- wherein maximum pressure of the air through the regulator and subsequently through the speed governor is determined by spring forces of solely the first and second springs and resistance of the piston to flow of air through the valve.
An air pressure regulator for an air powered tool, the regulator being disposed in a housing for the tool along an air inlet, the regulator having a valve to open and close flow of pressurized air in the air inlet, a bias spring urging the valve in the direction of air flow through the inlet to close the valve, a plunger or other switch mechanism operable to move the valve from a closed to an open position against the direction of air flow in the air inlet, a piston connected to the valve on one side and exposed to flow of air through the air inlet, and a regulator spring disposed between the piston and the plunger, the piston extending along the outside of the regulator spring, the regulator spring contacting an inner end of the piston and the plunger extending within the piston, whereby upon depressing the plunger or otherwise operating the switch mechanism the regulator spring urges the piston to open the valve against the air flow direction to permit pressurized air to flow through the regulator, and wherein maximum pressure of the air through the regulator is determined by spring forces of the bias and regulator springs and resistance of the piston to flow of air through the valve.
Dependencies are inferred from the claim text.