Lever and fulcrum clamping assembly

• US 4,193,174 A
• Filed: 04/11/1978
• Issued: 03/18/1980
• Est. Priority Date: 04/11/1978
• Status: Expired due to Term

• Current Assignee: Portex, Inc. (Smiths Group International Holdings Ltd.)
• Original Assignee: Portex, Inc. (Smiths Group International Holdings Ltd.)
• Inventors: Stephens, Thomas P.
• Primary Examiner(s): Dorner, Kenneth
• Application Number:
  US05/895,405
• Time in Patent Office: 707 Days
• Field of Search: 24/249 R, 24/248 R, 24/255 SL, 24/30.5 R, 24/132 R, 24/257, 24/132 WL, 251/9, 251/10, 128/346
• US Class Current: 24/532
• CPC Class Codes: A44B 99/00 Subject matter not provided for in other groups of this subclass
• CPC Class Codes: A61M 2025/024 having a clip or clamp system
• CPC Class Codes: A61M 2210/0618 Nose
• CPC Class Codes: A61M 2230/005 Parameter used as control input for the apparatus
• CPC Class Codes: A61M 25/02 Holding devices, e.g. on the body
• CPC Class Codes: A61M 39/28 Clamping means for squeezing flexible tubes, e.g. roller clamps tube strippers A61M1/83
• CPC Class Codes: Y10S 128/26 Cannula supporters
• CPC Class Codes: Y10T 24/3956 Jaws locked together by cam, wedge, lever, or screw
• CPC Class Codes: Y10T 24/44658 with specific means for mounting to flaccid supporting structure or structure-to-be-secured
• CPC Class Codes: Y10T 24/44752 Integral locking-means

Abstract

The present invention relates to a one-piece tubular clamping assembly formed from a plastic type material and comprising a first clamping arm engageable with a flange positioned on a second clamping arm to create a unique lever and fulcrum structure capable of securing one or more concentric tubular members in place or blocking a flow path through a tubular member. The present invention further comprises a novel locking mechanism for preventing accidental disengagement of the clamping assembly.

Claims

1. A clamping assembly for fixedly enclosing at least one generally tubular member, comprising:

first and second clamping arms each having a first end portion;

said first end portions being attached to each other to allow for the relative pivotal motion of said clamping arms;

a flange assembly including a neck portion attached to said first clamping arm and a head portion integrally attached to said neck portion, wherein said head portion is formed with a relatively greater cross-sectional size than said neck portion;

a generally wedge-shaped assembly extending from said second clamping arm; and

convexly-shaped surface means formed on a portion of said flange head and engagable with complementary concavely-shaped surface means formed on a portion of said wedge-shaped assembly as said second clamping arm is pivoted toward said first clamping arm, to frictionally retain at least one tubular member positioned between said clamping arms.

2. A clamping assembly according to claim 1, wherein each of said first and second clamping arms is generally rectangular in shape.

3. A clamping assembly according to claim 1, wherein said clamping assembly is formed of a plastic-like material.

4. A clamping assembly according to claim 1, wherein said first clamping arm further includes a pair of apertures extending through opposite end portions.

5. A clamping assembly according to claim 1, wherein said first clamping arm further includes a second end portion of reduced cross-sectional width, with

a flange extending from the second end portion in a direction generally parallel to said first connecting means, said flange being formed with an aperture extending therethrough.

6. A clamping assembly according to claim 5, wherein a knob-shaped member is attached to a second end portion of said second clamping arm and is extendable through said aperture formed in said flange to lock said clamping arms in a fully closed position.

7. A clamping assembly according to claim 1, wherein said first end portions are integrally attached to one another.

8. A clamping assembly according to claim 1, wherein said convexly-shaped surface means provides a fulcrum about which said second clamping arm is pivoted to fixedly enclose a tubular member positioned between said first and second clamping arms.

9. A clamping assembly according to claim 1, wherein a shallow groove is formed in said first clamping arm and positioned between said flange assembly and said attached second clamping arm.

11. A clamping assembly according to claim 1, wherein a steeply inclined groove is formed in said first clamping arm and positioned between said flange assembly and said attached second clamping arm.

12. A clamping assembly according to claim 11, wherein an L-shaped surface is formed on said flange assembly between said groove and said convexly-shaped surface means,

and said first end portion of said second clamping arm comprises first and second attached portions inclined at an angle to one another and extending between said first clamping arm and the concavely-shaped surface means formed on said wedge-shaped assembly,

whereby at least one tubular member positioned within said steeply inclined groove is clampingly compressed to completely block a flow path through the tubular member as said flange and wedge-shaped assemblies are brought into abutting engagement.

10. A clamping assembly according to claim 13, wherein said first end portion of said second clamping arm extends between said groove and the concavely-shaped surface means formed on said wedge assembly,

whereby at least one tubular member positioned within said shallow groove is clampingly enclosed without impeding a flow path through the tubular member as said flange and wedge-shaped assemblies are brought into abutting engagement.