Power tool

Claim 2

A readily portable wire cutting and layover tool comprising: means defining a housing; a piston means reciprocally mounted in said housing for movement between operative aNd inoperative positions; said piston means including a cutting quill connected thereto; a guide projecting outwardly from said housing, said guide having a bore extending therethrough for receiving said quill, whereby said quill is moved relative to said guide when said piston means and connected quill are actuated; means in the form of a notch formed in the end of said guide to one side thereof, said notch being disposed transversely of said bore for receiving and effecting the cutting and layover of the wire when said piston means and connected quill are actuated; a spring means acting on said guide and said piston means for normally biasing said piston and connected quill toward inoperative position; a valve means disposed in said housing for introducing an actuating fluid on one side of said piston means whereby the force of the fluid pressure acting on said piston means overcomes the bias action on said quill to effect movement thereof toward operative position; means for actuating said valve means; and said guide having a tip end portion which is acutely angled to be placed in contact with the circuit board so as to position the longitudinal axis of said quill at an acute angle with respect to the plane of a circuit board.

Claim 3

The invention as defined in claim 1 wherein said housing means includes: a piston housing having a chamber formed therein defining a cylinder for said piston means; an end cap connected to the end of said piston housing; said end cap having an opening therein for receiving said quill; and said piston housing including a valve chamber formed adjacent the other end of said piston housing; means defining a passageway interconnecting said valve chamber with said piston chamber, and means defining a fluid inlet to said valve chamber; said valving means including a valve body disposed within said valve chamber; said valve body having an outlet disposed in communication with said passageway; and a valve member disposed in said valve body for controlling the flow of fluid pressure from said inlet to said passageway; said valve body including a cylindrical sleeve having a valve seat formed on each end thereof and said valve member comprises a spool valve having spaced valve heads adapted to engage in sealing relationship with one of said valve seats; and said valve head on the inlet side of said valve body is disposed above the centerline of said inlet so that fluid pressure acting on said valve member normally maintains one of said valve heads seated against the inlet end of said valve body to prohibit the passage of fluid to said passageway independently of any springs.

Claim 4

A portable hand held, wire-cutting and bending tool comprising: a housing having a piston chamber formed therein; a piston means mounted in said piston chamber for movement between operative and inoperative positions; said piston means including a connected cutting quill; a quill guide extending outwardly from said housing; said quill guide having a bore extending therethrough for receiving said quill whereby said quill is moved relative to said guide when the piston means is actuated; said quill guide having a notch formed in one side thereof adjacent the tip end thereof, said notch extending transversely of said bore; said quill guide having a tip end acutely angled relative to the longitudinal axis of its bore to dispose the longitudinal axis of said bore at an acute angle when the tip end is placed in contact with a circuit board; a means normally biasing said piston means and connected quill toward inoperative position; means defining a valving chamber formed in said housing; means defining a fluid inlet to said valving chamber; means defining a passageway connecting said valving chamber in communication with said piston chamber; a valving means disposed in said valving chamber for controlling the flow of fluid pressure througH said valving chamber to said piston chamber to actuate said piston means and connected quill; an actuating means operating said valve means; and means for venting said piston chamber to atmosphere when said piston means is actuated.

Claim 5

A portable hand held, wire-cutting and bending tool comprising: a housing having a piston chamber formed therein; a piston means mounted in said piston chamber for movement between operative and inoperative positions; said piston means including a connected cutting quill; a quill guide extending outwardly from said housing; said quill guide having a bore extending therethrough for receiving said quill whereby said quill is moved relative to said guide when the piston means is actuated; said quill guide having a notch formed in one side thereof adjacent the tip end thereof, said notch extending transversely of said bore; said quill guide having a tip end acutely angled relative to the longitudinal axis of its bore to dispose the longitudinal axis of said bore at an acute angle when the tip end is placed in contact with a circuit board; a means normally biasing said piston means and connected quill toward inoperative position; means defining a valving chamber formed in said housing; means defining a fluid inlet to said valving chamber; means defining a passageway connecting said valving chamber in communication with said piston chamber; a valving means disposed in said valving chamber for controlling the flow of fluid pressure througH said valving chamber to said piston chamber to actuate said piston means and connected quill; an actuating means operating said valve means; and means for venting said piston chamber to atmosphere when said piston means is actuated.

Claim 6

The invention as defined in claim 3 wherein: said valving chamber has its fluid inlet adapted to connect to a source of fluid pressure, and an outlet in communication with said passageway; and means defining a valve seat interposed between said inlet and outlet; and said valve means having a valve head adapted to seat on said valve seat to control the flow of fluid through said valve chamber; and said valve head being disposed above said fluid inlet so that the pressure of said fluid normally maintains said valve head seated against the valve seat independently of any springs to prohibit the flow of fluid therethrough.

Claim 7

The invention as defined in claim 4 and said valving chamber including a guide recess adjacent one end thereof, and said spool valve including a guide extension adapted to be received in said guide recess for guiding said valve between operative and inoperative positions.

Claim 8

The invention as defined in claim 2 wherein said valve body comprises: a member having a bore extending thereinto; said member having an opening for communicating said fluid inlet to said bore; an external annular groove circumscribing said member; said groove having an opening defining an outlet from said bore to communicate with said passageway; a valving member disposed in said bore; said valving member having a hollow stem extending beyond the end of said bore and said housing; a spring means disposed within said hollow stem; and said stem having a vent opening adapted to exhaust to atmosphere.

Claim 9

A portable, freely movable wire cutter and layover power tool comprising: a housing including a power end portion having an open end piston chamber formed therein; an end cap having a central opening therein closing the open end of said piston chamber; and a guide end portion connected to said end cap; a piston means including a piston head reciprocally mounted in said piston chamber; a cutting quill connected to said piston head; said cutting quill extending through said central opening of the end cap; a spring means disposed between said piston head and said end cap for normally biasing said piston head and connected quill toward inoperative position; a quill guide connected to said guide end portion; said quill guide having a bore extending therethrough adapted to receive said quill; a valve chamber formed in said power end portion; an inlet connected in communication with said valve chamber; a passageway connecting said valve chamber in communication with said piston chamber; a cylindrical valve body disposed in said valve chamber; said valve body having an outlet disposed in communication with said passageway; a means defining a valve seat on each end of said cylindrical valve body; said valve seats being disposed on opposite sides of said valve body outlet; a valving member comprising a spool valve; said spool valve including a first and second valve head for alternating valving said valve seat whereby one of said valve seats opens to the atmosphere; means for guiding said spool valve within said valve chamber; said valve spool being disposed to one side of the center line of said fluid inlet whereby the force of said fluid pressure normally urges said spool valve toward inoperative position to close said outlet from said inlet independently of any spring; and an actuator operating on said spool valve to actuate said spool valve toward operative position for directing fluid pressure through said outlet and connected passageway to effect displacement of said means for venting said piston chamber to the atmosphere; and means formed on said quill guide for effecting the cutting and layover of a wire when the quill is actuated; said latter means comprising a notch which opens to one side of said guide and extends transversely of said bore for receiving a wire extending transversely through the bore in said guide; and said quill including a tapered end portion that is acutely angled and said quill guide having a complementary acutely angled tip end whereby said guide and associated quill is disposed at an acute angle with respect to the circuit board in the operative position thereof.

Claim 10

A portable, freely movable wire cutter and layover power tool comprising: a housing including a power end portion having an open end piston chamber formed therein; an end cap having a central opening therein closing the open end of said piston chamber; and a guide end portion connected to said end cap; a piston means including a piston head reciprocally mounted in said piston chamber; a cutting quill connected to said piston head; said cutting quill extending through said central opening of the end cap; a spring means disposed between said piston head and said end cap for normally biasing said piston head and connected quill toward inoperative position; a quill guide connected to said guide end portion; said quill guide having a bore extending therethrough adapted to receive said quill; a valve chamber formed in said power end portion; an inlet connected in communication with said valve chamber; a passageway connecting said valve chamber in communication with said piston chamber; a cylindrical valve body disposed in said valve chamber; said valve body having an outlet disposed in communication with said passageway; a means defining a valve seat on each end of said cylindrical valve body; said valve seats being disposed on opposite sides of said valve body outlet; a valving member comprising a spool valve; said spool valve including a first and second valve head for alternating valving said valve seat whereby one of said valve seats opens to the atmosphere; means for guiding said spool valve within said valve chamber; said valve spool being disposed to one side of the center line of said fluid inlet whereby the force of said fluid pressure normally urges said spool valve toward inoperative position to close said outlet from said inlet independently of any spring; and an actuator operating on said spool valve to actuate said spool valve toward operative position for directing fluid pressure through said outlet and connected passageway to effect displacement of said means for venting said piston chamber to the atmosphere; and means formed on said quill guide for effecting the cutting and layover of a wire when the quill is actuated; said latter means comprising a notch which opens to one side of said guide and extends transversely of said bore for receiving a wire extending transversely through the bore in said guide; and said quill including a tapered end portion that is acutely angled and said quill guide having a complementary acutely angled tip end whereby said guide and associated quill is disposed at an acute angle with respect to the circuit board in the operative position thereof.