# US 5,710,532 A · Solenoid with movement dampener

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- Number: US 5,710,532 A
- Document ID: US5710532A
- Status: Granted
- Kind: A
- Application number: 08/440,534
- Filed: 1995-05-12
- Granted: 1998-01-20
- Earliest claimed: 1995-05-12
- Assignees: Capcom Coin-Op, Inc.
- Inventors: Rick Morgan; Robert S. Morrison
- Web page: https://patentgrep.com/patent/US5710532A

## CPC

- A63F 7/3075: {imparting energy to the ball, e.g. bumper-kickers, reprojectors}
- H01F 7/088: {provided with means for absorbing shocks}
- A63F: CARD, BOARD, OR ROULETTE GAMES; INDOOR GAMES USING SMALL MOVING PLAYING BODIES; VIDEO GAMES; GAMES NOT OTHERWISE PROVIDED FOR
- H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES

## Abstract

A solenoid having a controlled rate of motion is provided. The solenoid includes a housing having a channel disposed therein, a coil disposed around the channel for providing an electromagnetic force in response to a current being supplied therethrough, and a plunger disposed within the channel and movable between a first position and a second position in response to the presence or absence of the electromagnetic force. A dampener is linked to the plunger which creates an atmospheric pressure differential as the plunger moves to one or both of the first position or the second position which pressure differential acts to slow the rate of movement of the plunger.

## Claims

### Claim 1

A solenoid having a controlled rate of motion, comprising:
a solenoid housing having a channel disposed therein;
a coil disposed around said channel for providing an electromagnetic force in response to a current being supplied therethrough;
a solenoid plunger disposed within said channel and movable between a first position and a second position in response to the presence or absence of said electromagnetic force;
a dampener housing in which is movably disposed a dampener plunger, said dampener plunger having a seal positioned therearound and cooperative with said dampener housing; and
a link connecting said solenoid plunger to said dampener plunger whereby movement of said solenoid plunger produces a reciprocal movement of said dampener plunger;
wherein said movement of said dampener plunger in response to said movement of said solenoid plunger to one of said first position or said second position creates an atmospheric pressure differential within said dampener housing which pressure differential acts to slow the rate of movement of said solenoid plunger.

### Claim 2

A pinball machine, comprising:
a playfield upon which is disposed a movable play feature;
a housing having a channel disposed therein;
a coil disposed around said channel for providing an electromagnetic force in response to a current being supplied therethrough;
a solenoid plunger disposed within said channel and movable between a first position and a second position in response to the presence of said electromagnetic force;
a dampener housing in which is movably disposed a dampener plunger having a seal positioned therearound and cooperative with said dampener housing for use in creating an atmospheric pressure differential within said dampener housing to slow the rate of movement of said dampener plunger in at least one direction; and
a linkage connecting said solenoid plunger to said dampener plunger and said movable play feature.