Self-locking railvice guided along a T-slot

• US 5,542,654 A
• Filed: 11/28/1994
• Issued: 08/06/1996
• Est. Priority Date: 11/28/1994
• Status: Expired due to Fees

• Current Assignee: Lars Johanson
• Original Assignee: Lars Johanson
• Inventors: Johanson, Lars
• Primary Examiner(s): Watson, Robert C.
• Application Number:
  US08/348,971
• Time in Patent Office: 617 Days
• Field of Search: 269/134-138, 269/99, 269/100, 269/91-94
• US Class Current: 269/137
• CPC Class Codes: B25B 1/10 using screws
• CPC Class Codes: B25B 1/2473 with pull-down action on the workpiece
• CPC Class Codes: B25B 1/2489 Slideways
• CPC Class Codes: B25B 5/10 using screws

Abstract

A railvice for use with a wire EDM, milling machine, or boring machine, having an elongated rail through which a T-slot extends longitudinally. A locking member of the railvice sits in the T-slot. A jaw element of the railvice connected to the locking member by a bolt includes a cavity for the locking member. The locking member has bias forces acting upon it to force the locking member towards the bottom of the T-slot as well as along the T-slot. The bolt externally anchored with respect to the locking member is rotated to cause the bias forces acting on the locking member to assist in either locking the locking member in the T-slot or forcing the locking member to the bottom of the T-slot for movement of the railvice along the T-slot.

Claims

1. A clamping system for a workpiece, said clamping system comprising:

a work support having a work surface,

an inverted T-shaped slot extending into said work support from said work surface,

at least one railvice including a jaw element for engaging the workpiece and holding the workpiece in position and a locking member slidably mounted in said slot,

rotation means extending through said jaw element and engaging said locking member for locking and releasing said locking member in said slot, and

bias means for biasing said locking member in a locked or released position in said slot depending upon rotation of said rotation means in either direction,

said bias means tilting said locking member in one direction of rotation of said rotation means and moving said locking member downwardly in an opposite direction of rotation of said rotation means.

2. A clamping system according to claim 1, wherein said T-shaped slot includes a vertical channel and two laterally extending wing recesses extending from said channel and said locking member engages horizontal surfaces of said two wing recesses to lock said locking member in said slot.

3. A clamping system according to claim 1, wherein said rotation means threadingly engages said locking member.

4. A clamping system according to claim 1, wherein said locking member includes a lower portion of an inverted T-shape.

5. A clamping system according to claim 4, wherein said locking member includes two laterally extending wings.

6. A clamping system for a workpiece, said clamping system comprising:

a work support having a work surface,

a slot extending into said work support from said work surface,

at least one railvice slidably mounted in said slot, said at least one railvice including a jaw element and a locking member,

connecting means for connecting said jaw element and said locking member and for locking and releasing said locking member in said slot, and

bias means for biasing said locking member dependent upon either direction of rotation of said connecting means for assisting in locking and releasing said locking member in said slot, said bias means including two springs.

7. A clamping system according to claim 6, wherein said connecting means is a threaded bolt.

8. A clamping system according to claim 7, wherein said locking member includes a nut for receiving said bolt.

9. A clamping system according to claim 6, wherein said slot is an inverted T-shape, and includes a vertical channel and two laterally extending wing recesses extending from said channel and said locking member engages horizontal surfaces of said two wing recesses to lock said locking member in said slot.

10. A clamping system according to claim 9, wherein said locking member includes two laterally extending wings.

11. A clamping system comprising:

a work support,

a jaw fixed on said work support,

a slot extending into said work support,

a railvice slidably mounted in said slot,

means for locking and releasing said railvice in said slot, and

bias means for biasing said railvice for assisting in locking and releasing said railvice in said slot as controlled by said means for locking and releasing, said bias means including two springs.

12. A clamping system according to claim 11, wherein said railvice includes a jaw element and a locking member and said means for locking and releasing connects said jaw element and said locking.

13. A clamping system for a workpiece, said clamping system comprising:

a work support having a work surface,

a slot extending into said work support from said work surface,

at least one railvice slidably mounted in said slot, said at least one railvice including a jaw element and a locking member,

connecting means for connecting said jaw element and said locking member and for locking and releasing said locking member in said slot, and

bias means for biasing said locking member dependent upon either direction of rotation of said connecting means for assisting in locking and releasing said locking member in said slot,

said bias means including a plunger for engaging said locking member and tilting said locking member to lock said railvice in said slot and a spring for moving the locking member downwardly into said slot for sliding of said railvice.

14. A clamping system according to claim 13, wherein said connecting means is a threaded bolt.

15. A clamping system according to claim 14, wherein said locking member includes a nut for receiving said bolt.

16. A clamping system according to claim 13, wherein said slot is an inverted T-shape and includes a vertical channel and two laterally extending wing recesses extending from said channel and said locking member engages horizontal surfaces of said two wing recesses to lock said locking member in said slot.

17. A clamping system according to claim 16, wherein said locking member includes two laterally extending wings.

18. A clamping system for a workpiece, said clamping system comprising:

a work support having a work surface,

a slot extending into said work support from said work surface,

at least one railvice slidably mounted in said slot, said at least one railvice including a jaw element and a locking member,

a bolt assembly for connecting said jaw element and said locking member, and

a spring assembly for tilting said locking member so that an upper and a lower surface of said locking member engage a top and a bottom surface, respectively, of a portion of said slot to thereby lock said locking member in said slot and a spring assembly for biasing said locking member away from engagement with said top surface of said portion of said slot so that said locking member is slidable in said slot.