Clamp

• US 6,711,789 B2
• Filed: 08/14/2002
• Issued: 03/30/2004
• Est. Priority Date: 08/14/2002
• Status: Expired due to Fees

• Current Assignee: Great Neck Saw Manufacturers Incorporated
• Original Assignee: Great Neck Saw Manufacturers Incorporated
• Inventors: Ping, Qiu Jian
• Primary Examiner(s): Knight, Anthony
• Assistant Examiner(s): JACKSON, ANDRE L
• Application Number:
  US10/218,043
• Publication Number:
  US 20040031131A1
• Time in Patent Office: 594 Days
• Field of Search: 244/99, 245/05, 245/08, 245/09, 24D/IG.13, 245/11, 243/26, 243/36, 24/675, 24/678, 245/45, 245/46, 269/2, 269/6, 269/68, 269/97, 813/02, 813/19--21, 813/37, 813/38
• US Class Current: 24/505
• CPC Class Codes: B25B 5/06 Arrangements for positively actuating jaws
• CPC Class Codes: B25B 7/14 Locking means B25B7/123 takes precedence
• CPC Class Codes: B25B 7/18 Adjusting means for the operating arms
• CPC Class Codes: Y10T 24/44376 Spring or resiliently biased about pivot
• CPC Class Codes: Y10T 24/44427 with position locking-means for gripping members

Abstract

A clamp having first and second handle assemblies with each handle assembly having a jaw, a hand grip and an intermediate portion. The handle assemblies are pivotally mounted to each other at their intermediate portions for movement between an open position and a predetermined closed position. A spring is provided for biasing the hand grips and jaws to an open position. A locking mechanism is provided to lock the jaws in the predetermined closed position. The locking mechanism comprises a rack mounted on one of the hand grips and a pawl mounted on the other hand grip, each of which have teeth adapted to mesh with each other to hold the jaws in the predetermined closed position. Mechanism is also provided to release the pawl teeth from the rack teeth to permit the jaws and hand grips to move to an open position.

Claims

1. A clamp comprising first and second handle assemblies, each handle assembly having a jaw, a hand grip and a intermediate portion, said handle assemblies being pivotally mounted to each other at their intermediate portion for movement between and open position and a predetermined closed position, means for biasing the hand grips and jaws to said open position, locking means to lock said jaws in said predetermined closed position, said locking means comprises a rack mounted on one of said hand grips and pawl mounted on the other hand grip, said pawl and said rack having teeth adapted to mesh with each other to hold the jaws in said predetermined closed position means to release said pawl teeth from rack teeth to permit the jaws and hand grips to move to an open position, means are provided to move said pawl toward said rack to cause the pawl teeth and the rack teeth to mesh with each other, said release means comprised means from moving the pawl away from said rack, a trigger assembly is pivotally mounted on said other grip and said pawl is connected to said trigger assembly, said trigger assembly is pivotally connected to said pawl.

2. A clamp as set forth in claim 1, wherein movement of said trigger assembly toward said hand grip will move the pawl away from said rack and movement of the trigger assembly away from said hand grip will move the pawl toward said rack.

3. A clamp as set forth in claim 2, wherein spring means are provided to bias the trigger assembly away form the hand grip to move the pawl toward the said rack.

4. A clamp as set forth in claim 3, wherein said pawl has an open end groove and wherein said trigger assembly is pivotally connected to said open end groove.

5. A clamp as set forth in claim 4, wherein said pawl has a arcuate slot and wherein said trigger assembly has means extending into said arcuate slot to limit its movement relative to the pawl.

6. A clamp as set forth in claim 5, wherein said trigger assembly comprises a finger portion and a body portion comprising spaced plates and wherein a pivot means connects said spaced plates to said outer open end groove in the pawl.

7. A clamp as set forth in claim 6, wherein said pivot means comprises a pin and wherein spring means are mounted on said pin, said spring adopted to bias the finger portion away from the said other handle.

8. A clamp as set forth in claim 7, wherein said other hand grip is hollow with side walls and a base and wherein said pivot means is mounted on said side walls.

9. A clamp as set forth in claim 8, wherein said spring means is mounted between said finger portion and said base in order to bias the finger portion away from the other hand grip.

10. A clamp as set forth in claim 9, wherein spring means are mounted at the pivot between said handle members in order to bias the handle members to an open position.