Quick change bit holder

Details Quick change bit holder Quick change bit holder

2000-06-21

2001-06-05

Banks, Derris H. (Department: 3723)

Abrading

Abrading process

Utilizing nonrigid tool

C451S495000

Reexamination Certificate

active

06241589

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to glass grinders.
BACKGROUND OF THE INVENTION
Fiocchi in U.S. Pat. No. 5,185,970 discloses a conventional expanding device for supporting grinding sleeves. The expanding device has “a shaped shaft which concentrically supports a plurality of mutually facing disks which can slide in an axial direction and which are rigidly rotationally connected with the shaft. The disks define, between one another in cooperation, a plurality of peripheral seats for the accommodation of elastic rings which can expand radially upon the axial compression of the disks. The elastic rings are suitable for engaging the inner surface of an emery cloth sleeve.” Abstract of U.S. Pat. No. 5,185,970.
A hand tool must be used to adjust that shaft which in turns expands or contracts those elastic rings. For some people, hand tools are difficult to use for such small objects.
In U.S. patent application Ser. No. 09/267,175 (now allowed) and assigned to applicant, Technicor, Inc., the inventor Hacikyan discloses “an expanding device for supporting grinding sleeves. The device has a cylindrical member with an outer surface, an interior chamber, an expanding chamber, and a locking mechanism. The outer surface receives the grinding sleeve and has a first outer diameter of D. The interior chamber receives a rotatable shaft and has a second outer diameter of I, which is less than D. The expanding chamber comprises an expanding material that expands and contracts based upon pressure applied thereon and has a third outer diameter of H and an inner diameter of J, wherein H and J are both greater than I and less than D. The locking mechanism has an open position and a closed position and requires no hand tool to alter its position. When the locking mechanism is in the open position the locking mechanism applies a pressure P to the expanding chamber so the first outer diameter is D, the second outer diameter is I, the third outer diameter is H, and the inner diameter is J. In contrast, when the locking mechanism is in the closed position the locking mechanism applies a pressure Z, which is greater than P, to the expanding material so the first outer diameter and the third outer diameter expand, and the second outer diameter and inner diameter contract.” The present invention is a preferred embodiment of this embodiment.
SUMMARY OF THE INVENTION
The present invention is an expanding device for supporting grinding sleeves. The device has a cylindrical member with an outer bushing unit, an interior bushing unit, an upper control unit, an expanding unit, and a locking mechanism. The outer bushing unit receives the grinding sleeve, and has a first outer diameter of D, and a height H. The interior bushing unit receives a rotatable shaft, has a second outer diameter of I, which is less than D, and a height J, which is less than H. The expanding unit extends from within the upper control unit and between the outer and interior bushing units with protrusions below the outer and interior bushing units. The locking mechanism is interconnected to the upper control unit. And when the locking mechanism is in the unlocked position, a grinding sleeve, which can have diamonds thereon, can be placed on or taken off the outer bushing unit and the device can be placed on or taken off a rotatable shaft. Obviously, when the locking mechanism is in the locked position, the grinding sleeve is locked in place on the outer bushing unit, and the device is secured to a rotatable shaft because the locking mechanism alter the position of the expanding unit which expands the outer diameter and shortens the height of the outer bushing unit, and simultaneously expands the interior diameter and shortens the height of the interior bushing unit.


REFERENCES:
patent: 2458217 (1949-01-01), Staggs
patent: 2804914 (1957-09-01), Butcko et al.
patent: 2971765 (1961-02-01), Atherholt, Sr.
patent: 3232011 (1966-02-01), Pineau
patent: 3496685 (1970-02-01), Schmidt et al.
patent: 3977127 (1976-08-01), Mahnken
patent: 4229014 (1980-10-01), Crowe
patent: 4600238 (1986-07-01), Goodford
patent: 4676376 (1987-06-01), Keiswetter
patent: 4723814 (1988-02-01), Hunt
patent: 4897968 (1990-02-01), Hutt
patent: 4955665 (1990-09-01), Richer
patent: 5185970 (1993-02-01), Fiocchi
patent: 5330251 (1994-07-01), McGuire
patent: 5351447 (1994-10-01), Grauert
patent: 5672096 (1997-09-01), Amarosa, Sr. et al.
patent: 5829828 (1998-11-01), Asfaw
patent: 6083086 (2000-07-01), Hacikyan

Affiliated with

Also associated with

Rating

Quick change bit holder does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Quick change bit holder, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quick change bit holder will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2526624