Browse Prior Art Database

Dead Blow Dampener for Impact Hammer

IP.com Disclosure Number: IPCOM000041155D
Original Publication Date: 1987-Oct-01
Included in the Prior Art Database: 2005-Feb-02
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Hardingn, SS: AUTHOR [+2]

Abstract

A unique backstop construction is described for dissipating unwanted recoil energy of a print actuator.

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Dead Blow Dampener for Impact Hammer

A unique backstop construction is described for dissipating unwanted recoil energy of a print actuator.

Referring to the Figures, backstop 1 is constructed of molded plastic to form a reservoir 2. Reservoir 2 has opening 3 for receiving a dampening material 4, such as tiny beads or spheres constructed of metallic, ceramic, plastic or other suitable material. The size and mass of the beads is chosen for a specific application and may vary with particular actuators. A cover 5 is snap fitted in opening 3 to keep the dampening ma terial 4 from escaping. Impact surface 6 of backstop 1 is thin relative to the remaining walls 7. The thick walls 7 resist flexing while impact surface 6 is thin enough to permit flexing under the impact of slider actuator 8.

In operation, slider 8 strikes impact surface 6 causing surface 6 to deform under the force of the blow. As the surface deflects inward, the volume of the reservoir 2 is reduced and the beads of dampening material 4, which are adjacent to the surface 6 at impact, are set in motion by the moving surface. This motion in turn causes other beads to create a small chain reaction. The churning action of the dampening material 4 is effective in converting the kinetic energy of slider 8 into thermal energy or heat thus more quickly bringing the actuator to a stop.

Disclosed anonymously.

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