Pneumatic tool having a reverse air control valve with an integral regulator
AssigneeChicago Pneumatic Tool Company
InventorsEdward F. Spring, Sr., Raymond J. Schaedler
Life of this patent
Estimating the term…
Abstract
A nut running air tool improved with a back and forth manually slidable control valve located between a throttle valve and an air motor, the control valve having a forward position allowing full volume air flow to the motor and maximum forward torque output, a reverse position allowing full volume air flow to the motor and maximum reverse torque output, and the control valve having integral manipulative means for adjusting its effective length so as to permit it to be moved to a third position allowing a restricted volume air flow to the motor and restricted forward torque output.
Claims14
In a hand held nut running tool including a housing having a spindle engageable with a threaded fastener, a reversible rotary air motor for imparting forward and reverse torque to the spindle accordingly as live air is applied to a forward or reverse side of the motor, and a throttle valve for admitting live air to the housing;
- a manipulative control valve located between the throttle valve and the motor for controlling the directional application and volume flow of the live air to the motor, the control valve being movable to a first position allowing a full volume air flow from the throttle valve to the forward side of the motor, the control valve being movable from the first to an opposite second position allowing a full volume air flow from the throttle valve to the reverse side of the motor, and means for adjusting the effective length of the control valve so as to enable it to be moved to a third position short of its first position in which a restricted volume air flow is allowed from the throttle valve to the forward side of the motor, the control valve as adjusted being movable from its third position to its second position allowing a full volume air flow from the throttle valve to the reverse side of the motor.
A pneumatically powered nut running tool comprising an air driven reversible motor, a throttle valve for admitting supply air to the tool, and a control valve disposed between the throttle valve and the motor selectively slidable for communicating supply air from the throttle valve to either a forward or a reverse driving side of the motor, the control valve being manually slidable in a forward direction to a first position in which it allows a full volume air flow from the throttle valve to a forward driving side of the motor and being manually slidable in an opposite direction to a second position in which it allows a full volume air flow from the throttle valve to a reverse driving side of the motor, and manually adjustable means effective only for limiting the extent of manual movement of the control valve in the forward direction to a third position short of the first position in which third position the control valve allows a restricted volume air flow from the throttle valve to the forward driving side of the motor.
A pneumatically powered nut running tool comprising a reversible rotary air motor, a throttle valve for admitting supply air to the tool, a manually slidably positionable control valve located between the throttle valve and the motor for controlling directional application and volume of supply air flow to the motor, the control valve being slidable to a first position in which it directs supply air at full volume flow from the throttle valve to a forward driving side of the motor and being slidable to an opposite second position in which it directs supply air at full volume flow from the throttle valve to a reverse driving side of the motor, manipulative means carried by the control valve selectively operable for adjustably shortening the length of the control valve, and the control valve in its adjusted condition being slidable to a third position in which it directs supply air at a reduced volume flow from the throttle valve to the forward driving side of the motor, means for preventing sliding of the control valve beyond its first and second positions, and other means for preventing sliding of the control valve in its adjusted condition beyond its third position.
Dependencies are inferred from the claim text.