Isolated hand-held vibrating device
AssigneeLord Corporation
InventorsJames T. Gwinn, Robert H. Marjoram
Life of this patent
Estimating the term…
Abstract
An isolator for use in a hand-held vibrating device for providing optimum vibration isolation by utilizing elastomeric sections. Six embodiments are shown which utilize elastomer sections to enhance vibration isolation along an axial direction of vibration. A first embodiment includes a frustoconical section, while the second employs a W-shaped buckling element. A third embodiment includes use of a tuned fluid inertia which is tuned to substantially coincide with a predominant operating frequency of the vibrating device and produces forces to substantially reduce the vibration transmission, while three other embodiments employ metallic buckling springs. Another embodiment employs a tuned vibration absorber and still another combines a tuned mass with a buckling column.
Claims21
A hand-held vibrating device for reducing the mechanical vibration imparted to the user, comprising:
- (a) a tool handle graspable by a user,
- (b) a tool body moveable relative to said tool handle, said tool body adapted to receive a tool, and
- (c) a vibration isolator attached between said tool handle and said tool body, said isolator including:
- (i) first end member attached to said handle, said first member including a first radially extending flange including a first axial face;
- (ii) a second end member attached to said tool body, said second end member including an axially directed section extending towards said first axial face of said first end member and including an external peripheral surface;
- and
- (iii) an elastomeric element bonded between said first axial face of said radially extending flange and said external peripheral surface.
A hand-held vibrating device, comprising:
- (a) a tool handle graspable by a user,
- (b) a tool body axially moveable relative to said tool handle, said tool body adapted to receive a tool, and
- (c) a vibration isolator attached between said tool handle and said tool body, said isolator including:
- (i) a first end member including an radially extending flange attached to said tool handle,
- (ii) a second end member attached to said tool body,
- (iii) an elastomeric element in between said first and second members, said elastomeric element being axially compressible, receiving an air tube therethrough, and defining at least a portion of a first variable volume chamber,
- (iv) a second flexible element axially spaced from said elastomeric element and defining at least a portion of a second variable volume chamber;
- (v) a fluid passageway connecting said first and second variable volume chambers;
- and
- (vi) a fluid contained within, and substantially filling, said first and second variable volume chambers and said fluid passageway;
- whereby vibrations of said tool body cause said fluid to flow within said fluid passageway thereby further reducing the vibration transmitted to said tool handle.
A hand-held vibrating device for reducing the mechanical vibration imparted to the user, comprising:
- (a) a tool handle gripable by a user,
- (b) a tool body moveable relative to said tool handle, said tool body adapted to receive a tool, and
- (c) a vibration isolator attached between said tool handle and said tool body, said isolator including:
- (i) first end member attached to said handle, said first member including a first radially extending flange including a first axial face;
- (ii) a second end member attached to said tool body, said second end member including an axially directed section extending towards said first axial face of said first end member and including an external peripheral surface and a radially extending flange having a second axial face;
- and
- (iii) an elastomeric element bonded to said first axial face of said radially extending flange and to said external peripheral surface and said second axial face of said second end member, said elastomer element receiving an air supply tube therethrough.
A fluid and elastomer vibration isolator for use between a handle to be grasped by a user and a tool body in a hand-held vibrating device, comprising:
- (a) a first and second variable volume chambers,
- (b) a flexible annular element flexibly attached between said tool body and said handle for transferring axial loads applied between the handle and said tool body, said flexible annular element defining a wall portion of said first variable volume chamber;
- (c) a diaphragm defining a wall portion of said second variable volume chamber;
- (d) a helical fluid passageway communicating between said first and second variable volume chambers, said passageway being tuned to provide a spring rate which softens at an operating frequency of said hand-held vibrating device;
- and
- (e) a fluid contained within, and substantially filling, said first and second variable volume chambers and said passageway.
Dependencies are inferred from the claim text.