Clamp

• US 7,533,910 B2
• Filed: 02/01/2006
• Issued: 05/19/2009
• Est. Priority Date: 02/01/2006
• Status: Active Grant

• Current Assignee: Norma US Holding LLC (Norma U.S. Holding)
• Original Assignee: R G Ray Corporation
• Inventors: Liedtke, Dan, Ma, Rufei
• Primary Examiner(s): Dunwoody; Aaron M
• Assistant Examiner(s): KEE, FANNIE C
• Application Number:
  US11/345,871
• Publication Number:
  US 20070176425A1
• Time in Patent Office: 1,203 Days
• Field of Search: 285364-368, 285406-407, 285410-411, 285/420, 403289-290, 403/344
• US Class Current: 285/420
• CPC Class Codes: F01N 13/1811 with means permitting relative movement, e.g. compensation of thermal expansion or vibration
• CPC Class Codes: F16L 21/065 tightened by tangentially-arranged threaded pins
• CPC Class Codes: F16L 23/08 connection by tangentially arranged pin and nut

Abstract

A clamp that includes a collar having first and second ends from which first and second lugs extend. Each of the first and second lugs has a thick portion and a thin portion, and the lugs are connected by a fastener. The clamp is positioned around tubes, and the fastener is tightened to tighten the clamp around the connection. The fastener may be tightened from an open position OP, when the lugs are not touching, to a closed position CP, when the thick portions of the lugs are touching. The fastener may be tightened further to a third position, so that the thin portions of the lugs move closer to one another. The clamp may also include a hinge area in which a gasket seal may be attached to the clamp or one of the tubes.

Claims

1. A clamp for use with tubes, comprising:

a collar having first and second ends and at least one hinge area integrally formed therein, the at least one hinge area defining a space between the collar and an associated tube;

a first lug coupled to the first end, the first lug including a distal end having a first thick portion and a proximal end having a first thin portion, wherein the first thick portion is thicker than the first thin portion, the first lug having an outside face extending radially from the collar and an inside edge opposite the outside face of the first lug, the inside edge of the first lug being substantially parallel to the outside face of the first lug along most of the length of the first thin portion;

a second lug coupled to the second end, the second lug including a distal end having a second thick portion and a proximal end having a second thin portion, wherein the second thick portion is thicker than the second thin portion, the second lug having an outside face extending radially from the collar and an inside edge opposite the outside face of the second lug, the inside edge of the second lug being substantially parallel to the outside face of the second lug along most of the length of the second thin portion; and

,

a fastener connecting the first lug to the second lug, wherein the first and second lugs are spaced from one another when the fastener is in an open position, the first and second thick portions touching one another when the fastener is in a closed position.

2. The clamp of claim 1, wherein the first and second thin portions extend from thin portion lower points to thin portion upper points, the first thin portion upper point being closer to the first thick portion than the first thin portion lower point, and the second thin portion upper point being closer to the second thick portion than the second thin portion lower point.

3. The clamp of claim 1, wherein the first thick portion extends from a first thick portion lower point adjacent the proximal end of the first lug to a first thick portion upper point at the distal end of the first lug, the first thick portion upper point having a greater width than the first thick portion lower point, the second thick portion extending from a second thick portion lower point adjacent the proximal end of the second lug to a second thick portion upper point at the distal end of the second lug, the second thick portion upper point having a greater width than the second thick portion lower point.

4. The clamp of claim 3, wherein the inside edge of the first lug diverges from the outside face of the first lug while extending from the first thick portion lower point to the first thick portion upper point at the distal end of the first lug, and the inside edge of the second lug diverges from the outside face of the second lug while extending from the second thick portion lower point to the second thick portion upper point at the distal end of the second lug.

5. The clamp of claim 1, wherein the first and second lugs each further include a fastener aperture formed therein.

6. The clamp of claim 1, wherein the first and second lugs further include lug walls that define a lug periphery and a fastener aperture.

7. The clamp of claim 1, wherein the fastener further includes a nut and a bolt.

8. The clamp of claim 1, wherein, when viewed from a cross-sectional line, the collar is defined by a ‘

V’

shaped cross-section.

9. The clamp of claim 1, wherein, when viewed from a cross-sectional line, the collar is defined by a semi-circular shaped cross-section.

10. The clamp of claim 1, wherein, when viewed from a cross-sectional line, the collar is defined by a ‘

V’

shaped cross-section with a flat bottom.

11. The clamp of claim 1, wherein the at least one hinge area is defined by two angled planes connected by a flat plane.

12. The clamp of claim 1, wherein the at least one hinge area is suitable for housing a gasket to allow improved sealing between associated tubes.

13. A clamp to connect tubes, the clamp comprising:

a collar having first and second ends and at least one hinge area integrally formed therein, the at least one hinge area defining a space between the collar and an associated tube, the collar being defined by a ‘

V’

shaped cross-section;

a first lug having a proximal and a distal end, an inside edge and a first outside face extending radially from the collar opposite the inside edge of the first lug, the proximal end of the first lug being coupled to the first end of the collar, the first lug having a first thin portion at the proximal end and a first thick portion at the distal end, the first thin portion extending from a lower first thin portion point adjacent the first end of the collar to an upper first thin portion point adjacent the first thick portion, the inside edge of the first lug being substantially parallel to the first outside face along most of the length of the first thin portion and the inside edge of the first lug diverging from the first outside face at the first thick portion, while extending from a lower first thick portion point adjacent the upper first thin portion to an upper first thick portion point at the distal end of the first lug, wherein the first thick portion is thicker than the first thin portion and the upper first thick portion point having a greater thickness than the lower first thick portion point;

a second lug having a proximal and a distal end, an inside edge and a second outside face extending radially from the collar opposite the inside edge of the second lug, the proximal end of the second lug being coupled to the second end of the collar, the second lug having a second thin portion at the proximal end and a second thick portion at the distal end, the second thin portion extending from a lower second thin portion point adjacent the second end of the collar to an upper second thin portion point adjacent the second thick portion, the inside edge of the second lug being substantially parallel to the second outside face along most of the length of the second thin portion and the inside edge of the second lug diverging from the second outside face at the second thick portion, while extending from a lower second thick portion point adjacent the upper second thin portion to an upper second thick portion point at the distal end of the second lug, wherein the second thick portion is thicker than the second thin portion and the upper second thick portion point having a greater thickness than the lower second thick portion point; and

,

a fastener connecting the first lug to the second lug, wherein the first and second lugs are spaced from one another when the fastener is in an open position, the first and second thick portions touching one another when the fastener is in a closed position.

14. The clamp of claim 13, wherein the first and second lugs include fastener apertures formed therein.

15. The clamp of claim 13, wherein the at least one hinge area is defined by two angled planes connected by a flat plane.

16. The clamp of claim 13, wherein the at least one hinge area is suitable for housing a gasket to allow improved sealing between associated tubes.

17. The clamp of claim 13, wherein the fastener further includes a nut and a bolt.