Multi-mode vibration absorbing device for implements

• US 5,935,027 A
• Filed: 12/28/1995
• Issued: 08/10/1999
• Est. Priority Date: 12/28/1995
• Status: Expired due to Fees

• Current Assignee: Roush Anatrol, Inc.
• Original Assignee: Roush Anatrol, Inc.
• Inventors: Nashif, Ahid D., Koganti, Gopichand
• Primary Examiner(s): Chiu, Raleigh W.
• Application Number:
  US08/580,297
• Time in Patent Office: 1,321 Days
• Field of Search: 473/549, 473/524, 473/521, 473/520, 473/297, 473/560, 473/564, 81/20, 81/22, 81/489
• US Class Current: 473/521
• CPC Class Codes: A63B 60/54 with means for damping vibrations

Abstract

A multi-mode vibration absorbing device for implements includes a base member and a mass mounted to the base member and cantilevered relative thereto. The multi-mode vibration absorbing device is tuned such that it vibrates at the same frequency as the implement but out of phase therewith.

Claims

1. A multi-mode vibration absorbing device for an implement comprising:

a viscoelastic base member having a body which is generally rectangular in shape and has an outer surface conforming to an interior surface of a handle of the implement;

said base member including a projection extending outwardly to divide said base member into a first side and a second side and having an aperture extending through said projection;

a mass extending through said aperture and cantilevered relative to the base member, said device being tuned such that it vibrates at the same set of frequencies as the implement but out of phase therewith to reduce multiple modes of frequency vibrations in the implement.

2. A multi-mode vibration absorbing device as set forth in claim 1 wherein said projection has a width less than the width of said body.

3. A multi-mode vibration absorbing device as set forth in claim 1 wherein said first side is greater in width than said second side.

4. A multi-mode vibration absorbing device as set forth in claim 1 wherein said first side has a stiffness greater than said second side.

5. A multi-mode vibration absorbing device as set forth in claim 1 wherein said mass has a longitudinal shaft and a first head at one end of said shaft and a second end at the other end of said shaft.

6. A multi-mode vibration absorbing device as set forth in claim 5 wherein said first head is larger than said second head, said projection being disposed between said first head and said second head.