One-piece housing of a worm driven hose clamp

• US 5,682,651 A
• Filed: 12/05/1996
• Issued: 11/04/1997
• Est. Priority Date: 12/11/1995
• Status: Expired due to Term

• Current Assignee: Norma Germany Gbmh
• Original Assignee: Rasmussen GmbH (NORMA Group SE)
• Inventors: Sauer, Heinz
• Primary Examiner(s): Brittain, James R.
• Application Number:
  US08/760,696
• Time in Patent Office: 334 Days
• Field of Search: 24/20 LS, 24/279, 24/274 R, 24/274 P, 24/274 WB
• US Class Current: 24/274.00R
• CPC Class Codes: F16L 33/08 in which a worm coacts with a part of the hose-encircling member that is toothed like a worm-wheel
• CPC Class Codes: Y10T 24/1427 Worm and tooth

Abstract

A one piece housing for a worm driven hose clamp includes a screw and a clamping band. The screw has a head and a shank. The shank is threaded. The housing includes a vaulted housing upper part and a housing lower part. The vaulted housing upper part has an open edge. The vaulted housing upper part receives the shank of the screw and supports the head at the opening edge. The housing lower part receives a first end segment and a second end segment of the clamping band. The first end segment has screw-thread segments. The threaded shank meshes with the screw thread segments. The housing lower part includes a base. The second end segment is fixed to the base. The housing lower part has only one side extension part for supporting the housing against turning during tightening of the screw. The side extension part has an upper wall comprising an upper wall segment, a lower wall segment and an upward-projecting wall. The upper wall segment and the lower wall segment overlap each other. The upward-projecting wall is connected to the base and, by a transition segment, to the upper wall segment. A portion of the transition segment is formed to create a cutout. The lower wall segment extends, at least in part, to an inner side of the upward-projecting wall. The lower wall segment extends, at least in part, into the cutout of the transition segment.

Claims

1. A one piece housing for a worm driven hose clamp comprising:

a screw having a head and a shank, said shank being threaded;

a vaulted housing upper part and a housing lower part, said vaulted housing upper part having an opening edge, said vaulted housing upper part receiving said shank of said screw and supporting said head at said opening edge, said housing lower part receiving a first end segment and a second end segment of a clamping band, said first end segment having screw-thread segments, said threaded shank meshing with said screw thread segments, said housing lower part including a base, said second end segment being fixed to said base, said housing lower part having only one side extension part for supporting said housing against turning during tightening of said screw, said side extension part having an upper wall comprising an upper wall segment, a lower wail segment and an upward-projecting wall, said upper wall segment and said lower wall segment overlapping each other, said upward-projecting wall being connected to said base and, by a transition segment, to said upper wall segment, a portion of said transition segment being formed to create a cutout, said lower wall segment extending, at least in part, to an inner side of said upward-projecting wall, said lower wall segment extending, at least in part, into said cutout of said transition segment.

2. The housing according to claim 1, wherein said cutout is a slot that projects, in the longitudinal direction of said transition segment, from an opening edge of said side extension part.

3. The housing according to claim 1, wherein said upper and lower wall segments extend tangentially with respect to a circumference of the clamp over an entire length of said extension part.

4. The housing according to claim 1, wherein said upper wall segment is vaulted.

5. The housing according to claim 1, wherein said transition segment is flat and forms an obtuse angle with respect to said upper wall segment and said upward-projecting wall.

6. The housing according to claim 1, wherein said transition segment is flat in its end regions adjacent to a first opening edge and a second opening edge of said side extension part, said transition segment has an approximately triangular shaped cross-section in a middle region between said end regions, said end regions form an obtuse angle with respect to said upper wall segment and said upward-projecting wall, said lower wall segment having a projection that engages in said middle region of said transition segment.

7. The housing according to claim 1, wherein said upper and said lower wall segments are joined together as a single piece of material.

8. The housing according to claim 7, wherein said upper and lower wall segments are joined by a spot weld.

9. The housing according to claim 8, wherein said spot weld is a projection weld.

10. The housing according to claim 1, wherein said transition segment has a plurality of beads extending in the direction of the bend.

11. The housing according to claim 1, wherein said housing is made of hardened steel, said housing further includes a reverse-lock tab depending from said housing upper part, said tab engaging a circumferential groove in said screw, which is disposed between said head and said threaded shank.

12. The housing according to claim 1, wherein said part of said lower wall segment that extends into said cutout is disposed at a predetermined distance from an edge of said upper wall segment that is disposed proximate to said screw head.

13. The housing according to claim 12, wherein said predetermined distance approximately corresponds to II·

Δ

d, where Δ

d corresponds to the change of the outside diameter, in dependency on the temperature within the permissible operating temperature range of an elastomeric hose that is clamped by said worm driven hose clamp.