Screw type clamping collar

• US 4,099,304 A
• Filed: 06/03/1976
• Issued: 07/11/1978
• Est. Priority Date: 06/04/1975
• Status: Expired due to Term

• Current Assignee: Tridon-Serflex SA
• Original Assignee: Tridon-Serflex SA
• Inventors: Luc, Andre R.
• Primary Examiner(s): Gelak, Bernard A.
• Application Number:
  US05/692,334
• Time in Patent Office: 768 Days
• Field of Search: 24/274 R, 24/274 P
• 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 screw-type clamping collar includes a flexible band having first and second end portions and inner and outer surfaces with a rack of teeth formed in said first end portion and having a part thereof protruding inwardly of the inner surface of the flexible band, on the side of the parts to be clamped. The second end portion of the band has a screw bearing saddle housing rigidly connected to it, and an axial opening formed therein having a width corresponding substantially to the width of the protrusions. These protrusions are engaged and maintained transversely in the opening of the band over a length corresponding approximately to the length of the housing and of the screw to guide movement of the band beneath the screw.

Claims

1. A screw-type clamping collar comprising a flexible band having first and second end portions and inner and outer surfaces;

said band having a rack of teeth formed thereon adjacent said first end portion and extending along the band for a predetermined distance, said rack teeth including portions protruding from the inner surface of said band, to be adjacent the part to be clamped;

a saddle housing rigidly mounted adjacent the second end portion of said band and having a passage therein for receiving the first end portion of the band above the second end portion thereof;

a screw rotatably mounted in said housing and fixed against axial movement thereon, said screw being positioned axially of said band whereby its threads will engage the rack teeth on the first end portion of the band in said housing passage to move said first end portion with respect to said second end portion upon rotation of said screw;

said second end portion of said band having an elongated slot formed therein extending for a predetermined distance axially of the band and having a width dimension transversely of the band which is substantially equal to the width dimension of said rack teeth whereby said slot receives and cooperates with the protruding portions of the rack teeth on the inner side of said first end portion of the band to guide movement of said first end portion of the band with respect to said second end portion during rotation of said screw;

said saddle housing having a pair of mounting lugs bent about the band beneath the inner side of the band adjacent said slot to secure the housing to the band;

said second end portion of the band adjacent said slot being bent upwardly away from the remainder of the band to form a projection on the outer side of the second end portion of the band and a recess on the inner side thereof, said recess having a depth substantially equal to the thickness of said housing lugs for receiving the lugs whereby the slot is maintained in close juxtaposition to the protruding portions of the rack to receive and guide the same;

said lugs on said housing having free end portions located on the inner side of the band adjacent said slot respectively including a boss received in said slot to resist transverse movement of the lugs with respect to the band.

2. A screw type clamping collar as defined in claim 1 wherein the length of said slot is approximately equal to the length of said saddle housing.

3. A screw type clamping collar as defined in claim 1 wherein said housing has first and second end wall portions spaced from each other in the longitudinal direction of said band, said end walls having aligned openings formed therein rotatably receiving said screw;

said openings defining arcuate edges in said housing and walls having a generally circular periphery defining an arc of more than 180° and

less than 360°

;

said edges substantially surrounding and engaging the screw to retain the screw in the housing while allowing rotation thereof.

4. A screw-type clamping collar comprising a flexible band having first and second end portions and inner and outer surfaces;

said band having a rack of teeth formed thereon adjacent said first end portion and extending along the band for a predetermined distance, said rack teeth including portions protruding from the inner surface of said band, to be adjacent the part to be clamped;

a saddle housing rigidly mounted adjacent the second end portion of said band and having a passage therein for receiving the first end portion of the band above the second end portion thereof;

a screw rotatably mounted in said housing and fixed against axial movement thereon, said screw being positioned axially of said band whereby its threads will engage the rack teeth on the first end portion of the band in said housing passage to move said first end portion with respect to said second end portion upon rotation of said screw;

said second end portion of said band having an elongated slot formed therein extending for a predetermined distance axially of the band and having a width dimension transversely of the band which is substantially equal to the width dimension of said rack teeth whereby said slot receives and cooperates with the protruding portions of the rack teeth on the inner side of said first end portion of the band to guide movement of said first end portion of the band with respect to said second end portion during rotation of said screw;

said saddle housing having a pair of mounting lugs bent about the band beneath the inner side of the band adjacent said slot to secure the housing to the band;

said second end portion of the band adjacent said slot being bent upwardly away from the remainder of the band to form a projection on the outer side of the second end portion of the band and a recess on the inner side thereof, said recess having a depth substantially equal to the thickness of said housing lugs for receiving the lugs whereby the slot is maintained in close juxtaposition to the protruding portions of the rack to receive and guide the same;

said band having a pair of recesses formed on its inner side on opposite sides of said slot and said lugs on said housing having free end portions located on the inner side of the band adjacent said slot and respectively including a boss received in said recesses to resist transverse movement of the lugs with respect to the band.

5. A screw-type clamping collar, comprising an elongated flexible band having first and second end portions and inner and outer surfaces;

a saddle housing secured to said second end portion of the band, and a screw mounted in said housing for free rotation in a fixed axial position in the housing;

said housing having a passage formed therein directly above said second end portion of the band for securing the first end portion of the flexible band, when the band is bent, between the housing and said second end portion, said first end portion of the band having a gear-type rack of predetermined length formed therein for engaging and cooperating with the threads of the screw in said housing whereby the first end portion of the band is moved with respect to the second end portion upon rotation of said screw;

said rack including protrusions on the inner surface of said flexible band, on the side of the part to be clamped with the collar; and

said second end portion of the band at said saddle housing having an elongated opening formed in the axis of the band, said opening having a width substantially corresponding to the width of the rack protruding on the inner surface of the band;

whereby said rack protrusions are engaged and maintained transversely in said opening to guide movement of said first end portion of the band with respect to said second end portion;

said second end portion of the flexible band adjacent said longitudinal opening being bent to form a projection directed towards the outside of the collar;

said housing being secured to said second end portion of the band by integral lugs bent under the inner surface of the band; and

the depth of said projection in the second end portion of the band corresponding approximately to the thickness of the lugs of the screw bearing saddle housing, said projection facilitating the maintenance of the rack protrusions in deep engagement in said opening and over a substantial portion of the rack;

the lugs of said screw bearing saddle housing each including at least one boss, engaged in said opening in the second end portion of the band to resist transverse movement of the lugs.

6. A screw-type clamping collar as defined in claim 5 wherein said opening has a length which corresponds approximately to the length of the saddle housing and of the screw.

7. A clamping collar as defined in claim 5 wherein said housing has first and second end wall portions spaced from each other in the longitudinal direction of said band, said end walls having aligned openings formed therein rotatably receiving said screw;

said openings defining arcuate edges in said housing and walls having a generally circular periphery defining an arc of more than 180° and

less than 360°

;

said edges substantially surrounding and engaging the screw to retain the screw in the housing while allowing rotation thereof.

8. A screw-type clamping collar, comprising an elongated flexible band having first and second end portions and inner and outer surfaces;

a saddle housing secured to said second end portion of the band, and a screw mounted in said housing for free rotation in a fixed axial position in the housing;

said housing having a passage formed therein directly above said second end portion of the band for securing the first end portion of the flexible band, when the band is bent, between the housing and said second end portion, said first end portion of the band having a gear-type rack of predetermined length formed therein for engaging and cooperating with the threads of the screw in said housing whereby the first end portion of the band is moved with respect to the second end portion upon rotation of said screw;

said rack including protrusions on the inner surface of said flexible band, on the side of the part to be clamped with the collar; and

said second end portion of the band at said saddle housing having an elongated opening formed in the axis of the band, said opening having a width substantially corresponding to the width of the rack protruding on the inner surface of the band;

whereby said rack protrusions are engaged and maintained transversely in said opening to guide movement of said first end portion of the band with respect to said second end portion;

said second end portion of the flexible band adjacent said longitudinal opening being bent to form a projection directed towards the outside of the collar;

said housing being secured to said second end portion of the band by integral lugs bent under the inner surface of the band; and

the depth of said projection in the second end portion of the band corresponding approximately to the thickness of the lugs of the screw bearing saddle housing, said projection facilitating the maintenance of the rack protrusions in deep engagement in said opening and over a substantial portion of the rack;

said band having a pair of recesses formed on its inner side on opposite sides of said slot and said lugs each including at least one boss respectively engaged in said recesses to resist transverse movement of the lugs.