US1164073A - Spring-jaw wrench. - Google Patents
Spring-jaw wrench. Download PDFInfo
- Publication number
- US1164073A US1164073A US86637814A US1914866378A US1164073A US 1164073 A US1164073 A US 1164073A US 86637814 A US86637814 A US 86637814A US 1914866378 A US1914866378 A US 1914866378A US 1164073 A US1164073 A US 1164073A
- Authority
- US
- United States
- Prior art keywords
- wrench
- jaws
- spring
- nut
- shank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B13/00—Spanners; Wrenches
- B25B13/02—Spanners; Wrenches with rigid jaws
- B25B13/08—Spanners; Wrenches with rigid jaws of open jaw type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
- B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
- B25B23/142—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for hand operated wrenches or screwdrivers
Definitions
- This invention relates to jaw wrenches of the type having nonadjustable jaws, and consists in a wrench having jaws which are normally at a fixed distance apart but which can spring farther apart under excesslve pressure and relax their grip upon the nut.
- the object of the invention is a wrench which will not overtighten a nut or bolt.
- the invention also consists in the wrench construction shown in the accompanying drawings and hereinafter described.
- Figure 1 is a side view of a wrench embodying the invention showing the jaws in normal position and engaging a nut
- Fig. 2 is an edge view of the same
- Fig. 3 is a side view of the wrench showing the jaws sprung apart by a nut held cornerwise between them.
- the wrench comprises a forged steel head 11 and shank 12.
- the head and shank are made in one piece, the shank being prolonged for a suitable distance to constitute a handle 13.
- the head is formed with two parallel jaw faces 14: at a suitable distance apart to loosely engage the opposite flat sides of a nut 15 of any desired size.
- the head and shank are cut or split lengthwise in a plane midway between'the jaw faces for a considerable distance from the opening between them in toward the handle, the cut or split 16 dividing the shank and head into two symmetrically arranged parts or jaws, each of which has one of the jaw faces 14: at its extremity.
- the head is hardened, and the shank is tempered to a spring temper.
- the length of the cut or split 16 and the dimensions of the shank are so chosen with respect to the resistance to bending of the steel of the shank as to make the force required to spring the jaws apart greater than that required to screw the nut up to the desired degree of tightness, but less than that required to strip the threads of the nut or break the bolt.
- the length of the handle is made such that the full strength of the average workman exerted thereupon will hardly be sufiicient to spring the jaws apart in case the nut or bolt head engaged thereby does not turn readily.
- a wrench consisting of a head having parallel jaw faces and a shank made of spring metal in line with said jaw faces, the shank being split lengthwise from the head between the jaw faces inwardly toward the handle end, thereby forming spring jaws which are unobstructed and free to spread apart under the excessive twisting pressure of overtightening a nut held between them.
- a wrench having a handle and two separate jaws, said jaws having spring metal shanks in substantial alinement with their faces connecting them with said handle, said shanks being unobstructed in their movement and free to flex and permitting resilient movement of said jaw faces, whereby twisting pressure upon a nut between the jaws tends to spread them apart.
- a wrench consisting of a bar of steel constituting a handle and having a head at one end formed with parallel jaw faces and split in from said head end in an axial plane to a point short of its handle to form resilient jaws having unobstructed outward movement, whereby excessive tightening of a nut by the jaws tends to spread them apart.
- a wrench having parallel jaws, each of said jaws being connected to a handle by Signed at St. Louis, Missouri this 7th day means of a flexible shank, said shanks being of October, 1914.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Description
A. O. CUNNINGHAM.
SPRING JAW WRENCH.
APPLICATION man OCT. 12. 1914.
Patented Dec. 14, 1915.
1,16&,073.
ANDREW o. CUNNINGHAM, OF ST. LOUIS COUNTY, MISSOURI.
SPRING-JAW WRENCH.
Specification of Letters Patent.
Patented Dec. 14:, 1915.
Application filed October 12, 1914. Serial No. 866,378.
To all whom it may concern:
Be it known that I, ANDREW O. CUNNING- HAM, a citizen of the United States, and a resident of St. Louis county, Missouri, have invented a new and useful Improvement in SpringJ aw WVrenches, of which the following is a specification.
This invention relates to jaw wrenches of the type having nonadjustable jaws, and consists in a wrench having jaws which are normally at a fixed distance apart but which can spring farther apart under excesslve pressure and relax their grip upon the nut.
The object of the invention is a wrench which will not overtighten a nut or bolt.
In tightening up track bolts and structural bolts, especially in construction work where cheap labor is employed, it not infrequently happens that too much force is applied to the wrench and the threads of the nut or bolt are stripped or the bolt is broken. This invention safeguards nuts and bolts from excessive stresses caused by overtightening them.
The invention also consists in the wrench construction shown in the accompanying drawings and hereinafter described.
In the drawings, in which like characters designate like parts of the wrench in the several views, Figure 1 is a side view of a wrench embodying the invention showing the jaws in normal position and engaging a nut; Fig. 2 is an edge view of the same; and Fig. 3 is a side view of the wrench showing the jaws sprung apart by a nut held cornerwise between them.
The wrench comprises a forged steel head 11 and shank 12. The head and shank are made in one piece, the shank being prolonged for a suitable distance to constitute a handle 13. The head is formed with two parallel jaw faces 14: at a suitable distance apart to loosely engage the opposite flat sides of a nut 15 of any desired size. The head and shank are cut or split lengthwise in a plane midway between'the jaw faces for a considerable distance from the opening between them in toward the handle, the cut or split 16 dividing the shank and head into two symmetrically arranged parts or jaws, each of which has one of the jaw faces 14: at its extremity.
The head is hardened, and the shank is tempered to a spring temper. The length of the cut or split 16 and the dimensions of the shank are so chosen with respect to the resistance to bending of the steel of the shank as to make the force required to spring the jaws apart greater than that required to screw the nut up to the desired degree of tightness, but less than that required to strip the threads of the nut or break the bolt. Also, the length of the handle is made such that the full strength of the average workman exerted thereupon will hardly be sufiicient to spring the jaws apart in case the nut or bolt head engaged thereby does not turn readily.
The invention is not restricted to the method of manufacturing the wrench above described nor to the particular materials above described; and modifications may be made in the shapes and dimensions of the various parts of the device without departing from the invention.
WV hat I claim as my invention is as follows:
1. A wrench consisting of a head having parallel jaw faces and a shank made of spring metal in line with said jaw faces, the shank being split lengthwise from the head between the jaw faces inwardly toward the handle end, thereby forming spring jaws which are unobstructed and free to spread apart under the excessive twisting pressure of overtightening a nut held between them.
2. A wrench having a handle and two separate jaws, said jaws having spring metal shanks in substantial alinement with their faces connecting them with said handle, said shanks being unobstructed in their movement and free to flex and permitting resilient movement of said jaw faces, whereby twisting pressure upon a nut between the jaws tends to spread them apart.
3. A wrench consisting of a bar of steel constituting a handle and having a head at one end formed with parallel jaw faces and split in from said head end in an axial plane to a point short of its handle to form resilient jaws having unobstructed outward movement, whereby excessive tightening of a nut by the jaws tends to spread them apart.
4. A wrench having parallel jaws, each of said jaws being connected to a handle by Signed at St. Louis, Missouri this 7th day means of a flexible shank, said shanks being of October, 1914. V
in lengthwise alinement with the faces of T said jaws, said jaws and shanks being un- ALDREWV CUNNINGHAM obstructed from outward movement and hav- Witnesses:
ing sufiicient rigidity to hold them in fixed JESSIE PALMER,
relationship under normal conditions of use. ANDREW Knssnms.
Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,
'Washington, D. G. V
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US86637814A US1164073A (en) | 1914-10-12 | 1914-10-12 | Spring-jaw wrench. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US86637814A US1164073A (en) | 1914-10-12 | 1914-10-12 | Spring-jaw wrench. |
Publications (1)
Publication Number | Publication Date |
---|---|
US1164073A true US1164073A (en) | 1915-12-14 |
Family
ID=3232099
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US86637814A Expired - Lifetime US1164073A (en) | 1914-10-12 | 1914-10-12 | Spring-jaw wrench. |
Country Status (1)
Country | Link |
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US (1) | US1164073A (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2662437A (en) * | 1950-07-24 | 1953-12-15 | Theron W Reynolds | Balanced wrench |
US3279286A (en) * | 1964-07-09 | 1966-10-18 | Snap On Tools Corp | Pre-set torque measuring device |
US3535959A (en) * | 1968-04-26 | 1970-10-27 | Eugene T Riza | Adjustable wrench |
US5507211A (en) * | 1994-06-23 | 1996-04-16 | Amei Technologies Inc. | Releasable socket |
US20050132849A1 (en) * | 2003-12-19 | 2005-06-23 | Macor Richard J. | Driver wrench |
US20100282030A1 (en) * | 2009-05-11 | 2010-11-11 | Youtsey Timothy L | Tool for installing and removing male F-type coaxial cable connector |
US20100313412A1 (en) * | 2009-06-15 | 2010-12-16 | Youtsey Timothy L | Coaxial cable compression tool |
WO2011027082A2 (en) | 2009-09-04 | 2011-03-10 | Scorpion | Torque wrench intended, in particular, for a dental instrument and corresponding bolting assembly |
US20110162492A1 (en) * | 2009-05-21 | 2011-07-07 | Pct International, Inc. | Coaxial connector torque application device |
US8752282B2 (en) | 2011-09-07 | 2014-06-17 | Pct International, Inc. | Cable preparation tool |
-
1914
- 1914-10-12 US US86637814A patent/US1164073A/en not_active Expired - Lifetime
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2662437A (en) * | 1950-07-24 | 1953-12-15 | Theron W Reynolds | Balanced wrench |
US3279286A (en) * | 1964-07-09 | 1966-10-18 | Snap On Tools Corp | Pre-set torque measuring device |
US3535959A (en) * | 1968-04-26 | 1970-10-27 | Eugene T Riza | Adjustable wrench |
US5507211A (en) * | 1994-06-23 | 1996-04-16 | Amei Technologies Inc. | Releasable socket |
US20050132849A1 (en) * | 2003-12-19 | 2005-06-23 | Macor Richard J. | Driver wrench |
US7975578B2 (en) * | 2009-05-11 | 2011-07-12 | Pct International, Inc. | Tool for installing and removing male F-type coaxial cable connector |
US20100282030A1 (en) * | 2009-05-11 | 2010-11-11 | Youtsey Timothy L | Tool for installing and removing male F-type coaxial cable connector |
US8490525B2 (en) | 2009-05-21 | 2013-07-23 | Pct International, Inc. | Coaxial connector torque application device |
US20110162492A1 (en) * | 2009-05-21 | 2011-07-07 | Pct International, Inc. | Coaxial connector torque application device |
US20100313412A1 (en) * | 2009-06-15 | 2010-12-16 | Youtsey Timothy L | Coaxial cable compression tool |
US8875387B2 (en) | 2009-06-15 | 2014-11-04 | Pct International, Inc. | Coaxial cable compression tool |
US9325136B2 (en) | 2009-06-15 | 2016-04-26 | Pct International, Inc. | Coaxial cable compression tool |
FR2949663A1 (en) * | 2009-09-04 | 2011-03-11 | Scorpion | DYNAMOMETRIC KEY, IN PARTICULAR FOR A DENTAL INSTRUMENT, AND CORRESPONDING BOLT ASSEMBLY. |
WO2011027082A3 (en) * | 2009-09-04 | 2011-04-28 | Scorpion | Torque wrench intended, in particular, for a dental instrument and corresponding bolting assembly |
WO2011027082A2 (en) | 2009-09-04 | 2011-03-10 | Scorpion | Torque wrench intended, in particular, for a dental instrument and corresponding bolting assembly |
US8752282B2 (en) | 2011-09-07 | 2014-06-17 | Pct International, Inc. | Cable preparation tool |
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