Work holders – Plural holders to hold workpieces relative to each other – Workpieces parallel to each other
Reexamination Certificate
2000-01-06
2001-04-17
Gerrity, Stephen F. (Department: 3723)
Work holders
Plural holders to hold workpieces relative to each other
Workpieces parallel to each other
C269S303000, C269S283000, C269S2540CS, C269S134000, C269S315000
Reexamination Certificate
active
06217014
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a work stop that can be positively positioned on a jaw plate of a vise using a groove provided in the top edge of the vise. The work stop has two parts that are expandable in dimension relative to the side surfaces of the groove to positively clamp the work stop in position. The jaw plate may be removable and includes locators so it is precisely positioned in its location when it is replaced.
Work stops have long been used, particularly in machining operations utilizing machine vises. Generally speaking, these stops are clamp mounted at a specific spot on the vise and then an adjustable rod that is held in the clamp is used to provide the desired stop position. The clamps generally are relatively cumbersome, and expensive if they are going to be much good.
There have been work stops developed which utilize dove tail slots on a fixed member, and then a mating dove tail block slides in the slot and supports a stop member for forming a work stop. One such device is shown in U.S. Pat. No. 5,018,562. However, with dove tail slots the mating pieces must seat closely for securely latching the two components together.
Thus, the need exists for providing a small, low cost, positive adjustable stop used in combination with a removable jaw plate for increasing the convenience and the speed of changing the work stop setting, and exchanging a clamp jaw plate set up for one workpiece for another jaw plate with a work stop for a different workpiece.
SUMMARY OF THE INVENTION
The present invention relates to a work stop system for use with machine vises. In particular, the work stop system includes an easily adjustable, small, low profile stop member that slides along a groove or slot in the top edge of a jaw plate of a vise and which can be positively locked in position. The locking requires very little movement of the locking members.
The present invention also presents a jaw plate that is used with a parallel sided slot or groove in a top edge that extends in direction along the length of the jaw plate, which direction is transverse to the clamping direction of a vise. The work stop has a body with a first lock portion that fits into the groove in the jaw plate, and a second lock portion also that fits into the groove and mates with the first lock portion so that upon tightening a screw or turning a cam the lock portions expand and the work stop is positively locked against the parallel side surfaces of the groove or slot.
Various forms of locks are shown, including a wedge type lock where a movable wedge portion slides on a wedge surface on the first portion. Cams, expansion lock, and other members that will cause the two lock portions to expand in a direction to engage both of the parallel side surfaces of the slot can be used.
The jaw plates are made with a vise or clamp jaw mounting so that the jaw plates can be removed from the jaw with the work stop left in position, and then later, when the same part is to be again made, the jaw plate can be replaced without changing the positioning of the work stop. The jaw plate is located precisely relative to the mounting jaw.
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Gerrity Stephen F.
Kurt Manufacturing Company, Inc.
Westman Champlin & Kelly P.A.
Wilson Lee
LandOfFree
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