Electrical hand tool with reciprocating drive
First Claim
1. An electric hand tool comprising, a housing, a reciprocating carrier for an operating member having an elongated, generally rectilinear working edge, said carrier being drivable by means of an electric motor contained in the housing for reciprocating the operating member along a generally rectilinear axis parallel to said working edge, forward and rearward guide assemblies supporting the carrier for generally reciprocal movement, each guide assembly having upper and lower rollers respectively engaging upper and lower planar surfaces of forward and rearward sets of such surfaces formed on the carrier, said planar surfaces being contained in parallel planes which are perpendicular to a plane containing the working edge of the operating member, each guide assembly having one of its rollers mounted for movement to and from the adjacent planar surface of the carrier, each guide assembly including spring means for urging said one roller into engagement with the carrier, and a sub-frame mounted in the tool housing and in turn mounting one of the guide assemblies for reciprocal movement in a plane generally perpendicular to the axis of reciprocation of the operating member.
1 Assignment
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Accused Products
Abstract
The invention relates to an electric hand tool comprising a housing, a reciprocating carrier for an operating member drivable by means of an electric motor placed in the housing, wherein the carrier is guided by at least two guide members fixed in the housing, wherein the guide members each comprise two guides placed on either side of the carrier, wherein one of the guides is fixedly attached and the other guide is provided with means for urging the guide against the carrier.
The occurrence of play, wear, noise nuisance and vibrations is thus avoided.
According to a preferred embodiment, both guides forming part of a guide member are formed by guide rollers received in a frame and the frame is fixedly mounted by means of a shaft extending through one of the guide wheels and a spring is placed between the housing and the frame such that the spring urges the other guide wheel into contact with the carrier.
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Citations
12 Claims
- 1. An electric hand tool comprising, a housing, a reciprocating carrier for an operating member having an elongated, generally rectilinear working edge, said carrier being drivable by means of an electric motor contained in the housing for reciprocating the operating member along a generally rectilinear axis parallel to said working edge, forward and rearward guide assemblies supporting the carrier for generally reciprocal movement, each guide assembly having upper and lower rollers respectively engaging upper and lower planar surfaces of forward and rearward sets of such surfaces formed on the carrier, said planar surfaces being contained in parallel planes which are perpendicular to a plane containing the working edge of the operating member, each guide assembly having one of its rollers mounted for movement to and from the adjacent planar surface of the carrier, each guide assembly including spring means for urging said one roller into engagement with the carrier, and a sub-frame mounted in the tool housing and in turn mounting one of the guide assemblies for reciprocal movement in a plane generally perpendicular to the axis of reciprocation of the operating member.
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11. An electric hand tool comprising, a housing, a reciprocating carrier for an operating member having an elongated, generally rectilinear working edge, said carrier being drivable by means of an electric motor contained in the housing for reciprocating the operating member along a generally rectilinear axis parallel to said working edge, forward and rearward guide assemblies supporting the carrier for generally reciprocal movement, each guide assembly having upper and lower rollers respectively engaging upper and lower planar surfaces of forward and rearward sets of such surfaces on the carrier, said planar surfaces being contained in parallel planes which are perpendicular to a plane containing the working edge of the operating member, each guide assembly including:
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(a) a pair of plates one on each side of the carrier; (b) a first shaft having its respective ends supported by said plates and rotatably supporting one of said upper and lower rollers; (c) a second shaft mounted in said housing and pivotally supporting said plates, said second shaft also mounting the other of said upper and lower rollers; and
spring means for urging said one roller of each of said guide assemblies into engagement with the carrier. - View Dependent Claims (12)
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Specification