Preset torque wrench

Details Preset torque wrench Preset torque wrench

1981-03-11

1983-09-13

Jones, Jr., James L.

Tools

Wrench, screwdriver, or driver therefor

Responsive to torque on work

B25B 23142

Patent

active

044035314

ABSTRACT:
The invention comprises improvements in manual preset torque wrenches that substantially improve the useful life of the wrench, the repeatable accuracy of the wrench, and substantially decrease the weight and manufacturing cost of the wrench.
The improvements include a free floating camming roller that moves from dual pockets with a rolling action substantially out of the pockets at the preset torque. In one embodiment the camming roller is centered within the wrench in the unactuated position between milled slots that comprise the pockets. In an alternate embodiment the pockets and camming roller are offset from the centerline of the wrench permitting a configuration that greatly reduces friction on the inside of the tubular wrench body. The reduction in friction and abrasion in the alternate embodiment permits a lightweight aluminum tube to be substituted for the body of the wrench thus significantly reducing the weight of the wrench.
The embodiments of the wrench permit the use of the same mechanism and same range of internal spring compression for a family of wrenches having several different ranges of torque settings. The maximum spring compression is identical for the maximum torque setting of each wrench of the family of wrenches. Thus, the load on critical internal wear parts is identical for all wrenches at their respective maximum torque settings. The load on the critical parts is well within the capacity of the parts, thereby minimizing inaccuracy due to the wear after extended use of any of the wrenches regardless of wrench size and maximum torque setting.

REFERENCES:
patent: Re25547 (1964-04-01), Skidmore
patent: 2393681 (1946-01-01), Hartley
patent: 3272002 (1966-09-01), Dickman
patent: 3577815 (1971-05-01), Bergquist
patent: 3599515 (1971-08-01), Grabovac
patent: 4316397 (1982-02-01), Skidmore et al.

Affiliated with

Also associated with

Rating

Preset torque wrench does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Preset torque wrench, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Preset torque wrench will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1724977