# US 2014/0299345 A1 · Hand-held tools and components thereof

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- Number: US 2014/0299345 A1
- Document ID: US20140299345A1
- Status: Published application
- Kind: A1
- Application number: 14/308,344
- Filed: 2014-06-18
- Published: 2014-10-09
- Earliest claimed: 2011-12-30
- Assignees: Campbell Hausfeld/Scott Fetzer Company
- Applicants: Campbell Hausfeld / Scott Fetzer Company
- Inventors: Jason Kyle McRoberts; Berlie Eugene Parks; Douglas Robert Harper; Katie Nicole Lay
- Web page: https://patentgrep.com/patent/US20140299345A1

## CPC

- B25F 5/006: {Vibration damping means}
- B23Q 5/06: driven essentially by fluid pressure or pneumatic power
- B24B 23/043: {reciprocatingly driven by a pneumatic or hydraulic piston}
- B24B 47/14: by liquid or gas pressure (B24B47/16 takes precedence)
- B24B 47/16: performing a reciprocating movement, e.g. during which the sense of rotation of the working-spindle is reversed
- B25F 5/00: Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
- B25F: COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR {(machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass B23P23/00 and subgroups)}
- B23Q: DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING (tools of the kind used in lathes or boring machines B23B27/00); MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B24B: MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING (grinding of gear teeth B23F, of screw-threads B23G1/36; by electro-erosion B23H; abrasive or related blasting B24C; tools for grinding, buffing or sharpening B24D; polishing compositions C09G1/00; abrasives C09K3/14; electrolytic etching or polishing C25F3/00; grinding arrangements for use on assembled railway tracks E01B31/17); DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS

## Abstract

A hand-held oscillating tool has a linear motor and an accessory attachment mechanism configured for releasable coupling to an accessory blade.

## Claims

### Claim 1

A hand-held tool comprising:
a housing defining a motor compartment;
a head assembly defining a head compartment;
an air inlet supported by the housing;
a pneumatic linear motor disposed at least partially within the motor compartment and comprising a piston, the piston comprising a shaft, wherein the piston is configured for reciprocation between a forward position and a rearward position;
a transmission assembly coupled to the shaft and disposed at least partially within at least one of the motor compartment and the head compartment;
at least one resilient member disposed at least partially within the head compartment adjacent the transmission assembly and configured for selective contact with one of the transmission assembly and the shaft when the piston is in one of its forward position and rearward position to facilitate dampening of the piston.

### Claim 2 (depends on 1)

The hand-held tool of claim 1 wherein said at least one resilient member is disposed forwardly of the transmission assembly and is configured for selective contact with the transmission assembly.

### Claim 3 (depends on 2)

The hand-held tool of claim 2 wherein said at least one resilient member is configured for selective contact with the transmission assembly when the piston is in the forward position.

### Claim 4 (depends on 1)

The hand-held tool of claim 1 wherein said at least one resilient member comprises a pair of bumper members.

### Claim 5 (depends on 4)

The hand-held tool of claim 4 wherein the pair of bumper members are formed of a fluoroelastomer having a durometer value of between about 65 and about 85.

### Claim 6 (depends on 1)

The hand-held tool of claim 1 wherein the transmission assembly comprises a cam that defines a slot.

### Claim 7 (depends on 6)

The hand-held tool of claim 6 wherein said at least one resilient member is disposed forwardly of the cam and configured for selective contact with the cam when the piston is in a forward position.

### Claim 8 (depends on 7)

The hand-held tool of claim 7 wherein said at least one resilient member comprises a pair of bumper members.

### Claim 9 (depends on 8)

The hand-held tool of claim 8 wherein the pair of bumper members are formed of a fluoroelastomer having a durometer value of between about 65 and about 85.

### Claim 10

A hand-held tool comprising:
a housing defining a motor compartment;
a head assembly rotatably coupled with the housing and defining a head compartment;
a linear motor disposed at least partially within the motor compartment and comprising a piston, the piston comprising a shaft and being configured for reciprocation;
a transmission assembly coupled to the shaft and disposed at least partially in at least one of the motor compartment and the head compartment;
wherein each of the transmission assembly, the piston and the head assembly are rotatable together.

### Claim 11 (depends on 10)

The hand-held tool of claim 10 wherein the linear motor comprises a pneumatic linear motor.

### Claim 12 (depends on 11)

The hand-held tool of claim 11 wherein the head assembly is further configured for selective locking among different rotational positions relative to the housing.

### Claim 13 (depends on 12)

The hand held tool of claim 12 further comprising:
a plurality of indexing tabs arranged circumferentially about the head assembly, wherein pairs of the indexing tabs cooperate to define respective slots therebetween; and
a locking button having a lower tab portion configured for selective interaction with each of the slots to facilitate locking of the head assembly in different angular positions.

### Claim 14 (depends on 13)

The hand-held tool of claim 13 wherein the slots are arranged such that the angular position of the head assembly can be locked at about every 45 degrees.

### Claim 15 (depends on 10)

The hand-held tool of claim 10 wherein the head assembly is further rotatably coupled to the pneumatic linear motor.

### Claim 16 (depends on 10)

The hand-held tool of claim 10 wherein the pneumatic linear motor further comprises an outer housing and each of the transmission assembly, the piston and the head assembly are rotatable together with respect to the outer housing.

### Claim 17

A hand-held tool comprising:
a housing defining a motor compartment;
a head assembly defining a head compartment;
an air inlet supported by the housing;
a pneumatic linear motor disposed at least partially within the air motor compartment and comprising a piston, the piston comprising a shaft, wherein the piston is configured for reciprocation along a longitudinal axis;
a transmission assembly disposed at least partially in at least one of the motor compartment and the head compartment, the transmission assembly comprising a cam that defines a slot, wherein a centerline bisects the slot and the slot is angled with respect to the longitudinal axis such that the centerline and the longitudinal axis form an acute angle.

### Claim 18 (depends on 17)

The hand-held tool of claim 17 wherein the centerline is angled from the longitudinal axis by an angle greater than about 30 degrees.

### Claim 19 (depends on 17)

The hand-held tool of claim 17 wherein the cam is pivotally coupled with the shaft.

### Claim 20 (depends on 17)

The hand-held tool of claim 17 further comprising an accessory attachment mechanism that comprises a bearing that is disposed within the slot and interacts with the slot to facilitate pivoting of the accessory attachment mechanism about a pivotal axis.

### Claim 21

A hand-held tool comprising:
a housing defining a motor compartment;
an air inlet supported by the housing;
a pneumatic linear motor disposed at least partially within the air motor compartment and comprising a piston, the piston comprising a shaft, wherein the piston is configured for reciprocation along a longitudinal axis; and
a transmission assembly disposed at least partially in one of the motor compartment and the head compartment, the transmission assembly comprising:
a boss coupled to the shaft of the piston; and
a cam pivotally coupled with the boss and configured to interact with a support a bearing of an accessory attachment mechanism to facilitate pivoting of the accessory attachment mechanism about a pivotal axis.

### Claim 22 (depends on 21)

The hand-held tool of claim 21 wherein the cam that defines a slot, a centerline bisects the slot, and the slot is angled with respect to the longitudinal axis such that the centerline and the longitudinal axis form an acute angle.

### Claim 23 (depends on 22)

The hand-held tool of claim 22 wherein the centerline is angled from the longitudinal axis by an angle greater than about 30 degrees.

### Claim 24 (depends on 21)

The hand-held tool of claim 21 further comprising at least one resilient member disposed forwardly of the cam and configured for selective contact with the cam when the piston is in a forward position to facilitate dampening of the piston.

### Claim 25 (depends on 24)

The hand-held tool of claim 24 wherein said at least one resilient member comprises a pair of bumper members formed of a fluoroelastomer having a durometer value of between about 65 and about 85.

### Claim at position 26

26-52. (canceled)