Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Adjustable double-ended box wrench










Image Number 3 for United States Patent #4787275.

An adjustable double-ended box wrench (10,10') is disclosed as including a wrench body (12) defining large and small box wrenches (20,22), an adjustable jaw assembly (14,14') including an elongated adjusting member (54,54') and a rotatable adjuster (56) that moves jaw end surfaces (70,72) to adjust the sizes of the wrenches, and a cover plate (16) that is secured to the wrench body (12) to retain the adjustable jaw assembly (14,14'). Each of the large and small box wrenches (20,22) includes a pair of associated diverging portions (34,44) and a pair of converging portions (36,46) as well as an associated connecting portion (42,52) that connect the associated engagement portions. Each of the connecting portions (42,52) preferably has a connecting wall (76,78) with curved ends that are tangent to associated engagement surfaces (38,48) in order to prevent stress concentration during use. In one embodiment of the wrench (10), the rotatable adjuster (56) is comprised by an adjusting nut ( 97) that receives an externally threaded portion (62) of the associated adjusting member (54) to provide the adjustment. In another embodiment of the wrench (10'), the rotatable adjuster (56) is comprised by an adjusting screw (110) that receives an internally threaded portion (106) of the associated adjusting member (54') to provide the adjustment. In each embodiment, the spacing between jaw ends (70 and 72) provides ease in switching from one wrench end to the other.








 
 
  Recently Added Patents
Electrophotographic photoreceptor, image-forming apparatus, and electrophotographic cartridge
Charged particle beam apparatus
Reduced plating ignitron
Apparatus and method for performing lawful intercept in group calls
Method of providing tailor-made software for hospital departments
Electronic document reading devices
Microfluidic system incorporating a metal impregnated nanoporous material in a microfluidic pathway thereof
  Randomly Featured Patents
Measuring and testing device for retractable medical devices
Display shelf
Apparatus and method for controlling reverse-link data transmission rate during handoff
Motor control apparatus
Fire protection code compliance verification system and method
Liquid crystal electrically-controlled birefringence display devices with improved contrast
Multiloop feedback control apparatus for DC/DC converters with frequency-shaping band pass current control
Door device for vending machine
Plastic container
Process equipment validation