Chicago Pneumatic Tool Company

David A Giardino

William K Wallace

Joseph R Groshans

Ronnie G Foltz

Kenneth A McHenry

Richard J Everett

Stephen M DeMarco

Peder P Messina, Iii

Gerrit Van Nederynen

The invention comprises retrofit kits for power impact tools. The retrofit kits adapt modular control apparatuses to power impact tools that where not originally manufactured to receive a modular control apparatuses. The retrofit kits comprise a modular control apparatus and at least one fastener. The modular control apparatus may be specially manufactured to adapt retrofit tools or an adapter may be included in the kit. Adapters intercept the energy flow to the motor of the tool and re-channels the energy flow through a modular control apparatus, which then controls the flow of energy to the motor. The retrofit kit may include instruction sheets describing and illustrating the methods of using the retrofit kit.

Retrofit kit for a modular control apparatus for a power impact tool

An impact tool having a control system for turning off a motor at a preselected torque level.

Processes of determining torque output and controlling power impact tools using a torque transducer

The invention comprises a power impact torque tool that is torque-limited by a novel torque-timing device that controls the amount of time that the tool motor operates after the operator initiates tool operation. The invention also includes the torque-timing device itself and with other tools. The invention further includes the torque-timing device in the form of a modular, releasably-attachable, user-adjustable control apparatus for tools powered by compressable fluids. The torque-time-limiting device allows the user to adjust a needle valve that controls the filling of a reservoir which, when full, provides the pressure required for actuating a shut-off valve.

Modular control apparatus for a power impact tool

A pneumatic tool apparatus, a pneumatic tool, and a method of making and using a pneumatic tool apparatus is disclosed. The apparatus has an inner torsion bar and an outer tube which has recesses which allow the apparatus to provide more torque in one direction of rotation than in the other direction of rotation.

Power impact tool torque apparatus

Grip for pneumatic hand tool

This invention relates generally to an impact tool. The present invention provides a vibration isolated impact tool wherein an impact mechanism and a motor assembly are arranged into a cartridge assembly. An elastomeric member resiliently connects the cartridge assembly with a housing. The cartridge assembly is free to move axially and rotationally within the housing. The elastomeric member absorbs axial vibration and torsional vibration, reducing the vibration transmitted to an operator.

Vibration isolated impact wrench

A process to more accurately determine torque output of power impact tools using impulse. Also disclosed are processes for controlling power impact tools, in particular a mechanical impact wrench, by determining the impulse of the tool impacts and deriving torque values therefrom. A mechanical impact wrench having an electronic control is also disclosed.

Process of determining torque output and controlling power impact tools using impulse

The invention is a pneumatic tool with a reverse valve having an overdrive. In particular, the pneumatic tool includes a housing, a rotor, rotatably mounted within the housing, an output shaft operatively coupled to the rotor, and pressure chambers defined between the housing and the rotor. A pneumatic reverse valve having an overdrive is operatively coupled to the rotor. The overdrive provides increased torque and increased speed to the output shaft. The reverse valve controls flow of pressurized air to a multi-chambered motor of the tool such that the direction of the motor can be reversed and the number of pressure chambers receiving pressurized air can be selected regardless of direction.

Pneumatic tool with a reverse valve having an overdrive

The present invention relates generally to pneumatic ratcheting mechanisms and in particular to a device to aid in shank spindle retainment during ratchet resetting. According to the present invention, at least one recess is provided in the shank spindle of a ratchet head to receive a spring therein. The end of the spring is compressed against an interior surface of the ratchet head to frictionally retain the shank spindle and pawl of the ratchet during the resetting stroke of the ratchet yoke.

Ratchet wrench head

Ratchet wrench

Pneumatic ratchet

An economically and technologically improved assembly for developing kinetic energy in a rotary impact tool. There is disclosed herein a two-part, readily assembled and disassembled pin cage-coupler. One part, a cylindrical, longitudinally grooved cage, which contains a clutch mechanism, is capped at one end by a lobed end plate coupler. Since there is no physical bonding during the functional life of these parts, they may be made separately by various metal working technologies, including sintering and forging.

Growing community of inventors

Rock Hill, SC, United States of America

David A Giardino