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US 6,148,930 AGranted
Percussion drill and/or jack hammer with handle spring-buffered against the hammer housing
AssigneeWacker-Werke GmbH & Co. KG
InventorsRudolf Berger, Thomas Maurer
Life of this patent
Estimating the term…
Abstract
A percussion drill and/or jack hammer has a handle that is spring-buffered against the hammer housing which has at least one straight guiding track running parallel to the longitudinal axis of the hammer. The handle can be moved to a limited extent along the guiding track in relation to the hammer housing and is spring-buffered in such a way that its movement against the guiding track is limited on all sides.
Claims19
A breaking and drilling hammer, having
- a handle which is resiliently biased on all sides with respect to a hammer casing in a manner which permits limited movement of the handle with respect to the hammer casing;
- at least one rectilinear guide which connects the handle to the hammer casing and which extends parallel to a longitudinal axis of the hammer and along which the handle can be displaced to a limited extent with respect to the hammer casing both in a direction of the longitudinal axis of the hammer and in a direction transverse to the longitudinal axis;
- the rectilinear guide having an inner guide element and an outer guide element which surrounds the inner guide element at a distance;
- at least one elastic element being inserted between an outer circumference of the inner guide element and an inner circumference of the outer guide element, the elastic element contacting and resiliently biasing the inner and outer guide elements away from one another both in the direction of the longitudinal axis of the hammer and in a direction transverse to the longitudinal axis;
- wherein
- at least one stop plane, which is perpendicular to a longitudinal axis of the hammer, is formed on the inner guide element;
- the elastic element extends longitudinally between the stop plane and an end face of the outer guide element;
- and wherein
- the elastic element extends longitudinally from the stop plane to the end face a greater distance than the elastic element extends between the inner guide element and the outer guide element, whereby the elastic element has a greater elasticity in the direction of the longitudinal axis of the hammer than in a direction transverse to the longitudinal axis;
- and wherein a second elastic element extends between a second stop plane, provided on the rear of the stop plane, and a second end face of the outer guide element, the end face being opposite the end face of the outer guide element.
7 more elements
A breaking and drilling hammer, comprising:
- a hammer casing;
- a handle mounted on the hammer casing and movable to a limited extent both parallel to a longitudinal axis of the hammer and transverse to the longitudinal axis of the hammer;
- at least one rectilinear guide which extends parallel to the longitudinal axis of the hammer, the rectilinear guide including an inner guide element and an outer guide element which surrounds the inner guide element in a spaced-apart relationship with respect thereto, one of the inner and outer guide elements being affixed to the hammer casing and the other of the inner and outer guide elements being affixed to the handle;
- at least one elastic element which is located between an outer circumference of the inner guide element and an inner circumference of the outer guide element and which contacts the inner and outer guide elements so as to bias the rectilinear guide both longitudinally of the hammer and laterally of the hammer to a neutral position thereof;
- wherein
- at least one stop plane is formed on the inner guide element, the stop plane being perpendicular to the longitudinal axis of the hammer;
- the elastic element extends longitudinally of the hammer between the stop plane and a transverse end face of the outer guide element;
- and wherein
- the elastic element extends longitudinally from the stop plane to the end face a greater distance than the elastic element extends between the inner guide element and the outer guide element, whereby the elastic element has a greater elasticity in the direction of the longitudinal axis;
- and wherein a second elastic element extends between a second stop plane, provided on the rear of the stop plane, and a second end face of the outer guide element, the end face being opposite the end face of the outer guide element of the hammer than in the direction transverse to the longitudinal axis.
7 more elements
Dependencies are inferred from the claim text.