Webbing tie down with friction roller

Abstract

A ratchet includes a knurled or longitudinally ridged roller for engagement by webbing. A pawl includes a lobe having knurling or ridges formed thereon on its curved surface for contacting the webbing and urging the webbing toward the roller. Upon applying a pulling force on the free end of the webbing it causes the roller to rotate and the pawl to rotate away from the roller. Translation of the webbing in the opposite direction causes the pawl to rotate toward the roller and compress the webbing between the lobe of the pawl and the roller. The knurling on the surfaces of the roller and the lobe prevent sliding movement of the webbing therepast. Applying a downward force on an extension of the pawl will cause rotation of the lobe out of contact with the webbing and permit translation of the webbing in either direction.

I claim: 
     
         1 . A ratchet for use with a length of webbing, said ratchet comprising:
 (a) a pair of sidewalls for supporting a plurality of pairs of bosses therebetween;   (b) a first pair of bosses of said plurality of pairs of bosses;   (c) a second pair of bosses of said plurality of pairs of bosses for rotatably supporting a roller;   (d) a pawl rotatably mounted intermediate said pair of sidewalls and including a stud engaging a passageway in each sidewall of said pair of sidewalls;   (e) an opening disposed intermediate said pair of sidewalls proximate said second roller for ingress and egress of the webbing; and   (f) a guide for guiding a free end of the webbing from said opening past said first pair of bosses, between said first pair of bosses and said roller, about a part of said roller and between said pawl and said roller whereafter the free end of the webbing exits through said opening.   
     
     
         2 . The ratchet as set forth in  claim 1  wherein said roller includes knurling and wherein said pawl includes a lobe having knurling. 
     
     
         3 . The ratchet as set forth in  claim 2  including a spring for biasing said lobe toward said roller. 
     
     
         4 . The ratchet as set forth in  claim 1  wherein said roller includes ridges and wherein said lobe includes teeth. 
     
     
         5 . The ratchet as set forth in  claim 4  wherein one surface of each of said ridge is radially aligned. 
     
     
         6 . The ratchet as set forth in  claim 1  including a double loop extending from said ratchet. 
     
     
         7 . The ratchet as set forth in  claim 6  including a further pair of bosses for supporting said double loop. 
     
     
         8 . A ratchet for use with a length of webbing having a free end and a working end, said ratchet comprising:
 (a) a pair of sidewalls for supporting a plurality of pairs of bosses therebetween;   (b) a first pair of bosses of said plurality of bosses for rotatably supporting a roller;   (c) a pawl having a pair of studs extending in opposed direction for rotatably engaging said pair of sidewalls;   (d) a second pair of bosses of said plurality of bosses for supporting a loop of a further length of webbing;   (e) said roller including knurling disposed about its cylindrical surface for mechanically interacting with the webbing in contact with said roller;   (f) said pawl including knurling disposed on a curved surface of a lobe for mechanically interacting with the webbing in contact with said curved surface upon exertion of a tension force on the working end of the webbing; and   (g) a thumb knob for rotating said pawl away from said roller to release the webbing from between said roller and said pawl.   
     
     
         9 . The ratchet as set forth in  claim 8  including a spring for biasing said pawl toward said roller. 
     
     
         10 . The ratchet as set forth in  claim 8  including a spring for urging said lobe into contact with said roller. 
     
     
         11 . The ratchet as set forth in  claim 8  including an extension of said pawl for manually rotating said pawl to bring about disengagement of said lobe with said roller. 
     
     
         12 . The ratchet as set forth in  claim 8  including a further pair of bosses of said plurality of pairs of bosses for supporting a double loop webbing. 
     
     
         13 . A ratchet for use with a length of webbing, said ratchet comprising:
 (a) a pair of sidewalls for supporting a plurality of pairs of bosses therebetween;   (b) a first pair of bosses of said plurality of pairs of bosses for rotatably supporting a roller;   (c) a pawl rotatably mounted intermediate said pair of sidewalls and including a stud engaging a passageway in each sidewall of said pair of sidewalls;   (d) an opening disposed intermediate said pair of sidewalls proximate said roller for ingress and egress of the webbing; and   (e) a guide for guiding a free end of the webbing from said opening about a part of said roller and between said pawl and said roller whereafter the free end of the webbing exits through said opening.   
     
     
         14 . The ratchet as set forth in  claim 13  wherein said roller includes knurling and wherein said pawl includes a lobe having knurling. 
     
     
         15 . The ratchet as set forth in  claim 14  including a spring for biasing said lobe toward said roller. 
     
     
         16 . The ratchet as set forth in  claim 13  wherein said roller includes ridges and wherein said lobe includes teeth. 
     
     
         17 . The ratchet as set forth in  claim 16  wherein one surface of each of said ridges is radially aligned. 
     
     
         18 . The ratchet as set forth in  claim 13  including a double loop extending from said ratchet. 
     
     
         19 . The ratchet as set forth in  claim 18  including a further pair of bosses of said plurality of bosses for supporting said double loop.