Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS1415731 A
Publication typeGrant
Publication dateMay 9, 1922
Filing dateDec 31, 1921
Priority dateDec 31, 1921
Publication numberUS 1415731 A, US 1415731A, US-A-1415731, US1415731 A, US1415731A
InventorsTerry Merrill H
Original AssigneeTerry Merrill H
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Ratchet wrench
US 1415731 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)


Patented May 9, 1922.

8 M 5 4 a m I I w r $3.7 my 00. m J 2 T 6 .J w x 5 w ,e

, 0 m 1 1X8 r H. a M u 11mm. 1;. may,


m'ronn'r wiumcn.

specification of Letters Patent.

Patented Ma 9,1922.

Application filed December 31, 1921. Serial No. 528,247.

To all whom it may concern:

Be it known that I, MERRILL TERRY, a citizen of the United States residing at Columbus, in the county of Franklin and State of Ohio, have invented a certain new and useful Improvement in Ratchet Wrenches, of which the following is a specification.

It oftentimes occurs that there is very little room for oscillating the handle of a ratchet wrench in turning a nut or bolt. The

object of the present invention is to provide an improved construction wherebythe bolt or nut maybe turned even .where there is no room for oscillating th handle. Other objects may be gathered from the following description. i

1 The invention is embodied herein shown and described.

In the accompanying drawing- .Figure 1 is a longitudinal section partly broken away.

Fig. 2 is a cross-section on the line 2-9 of l ig. 1, and Fig. 3 is a section like Fig. 2, of a modification of the construction.

In the views 5 is the ratchet member provided with teeth at its rim and with a central orifice 5 to engage thehead of a bolt in the example or nut or to receive a socket member (not shown) for engaging the head of a bolt '01 nut, as usual. In Fig. 2 the ratchet member, for possible convenience in manufacture, is composed of three principal parts pinned together by pins 6', the intermediate part being the toothed or ratchet portion and the other two formed to provide bearings in the walls of the head. In Fig. 3 the ratchet member is composed of a single. piece, the teeth being formed in a projecting rim whereas in Fig. 2 the teeth by reason of the overlapping top and bottom bearing pieces are virtually in an annular recess.

The ratchet member is inclosed in a ring 7 carrying a pivotal pawl 8 pressed by a spring 9-to insure engagement of the teeth. The ring 7 has its rim made as a worm gear to be engaged by a worm 10 on the end of a shaft 11 extending through a hollow handle 12. A screw pin at 14 in the handle proper engages a groove 15 in theshaft 11 to permit rotation butprevent longitudinal movement of the latter.

The shaft 11/ is equipped with a hand piece 16 for'tultning the worm so that the gear ring 7 maybe operated in either direction, but the worm and gear are shown as made irreversible, that is the worm cannot be turned by operating the gear.

The mechanism of the wrench head is enclosed by a cap 17 held in place by set screws 18.

The forms of the parts can be changed without departing from the gist of the invention as claimed.

What I claim is:

' 1. A wrench including, in combination. a ratchet member, a worm-gear ring surrounding the ratchet member and provided with a pawl to engage the ratchet member, and a worm engaging the worm-gear ring.

2. A wrench including, in combination. a handle, a ratchet member, a worm-gear ring surrounding the ratchet member and provided with a pawl to engage the ratchet member, a worm engaging the worm gear. and a shaft within said handle for turning said worm.

3. A wrench including. in combination. a ratchet member, a worm-gear ring surrounding the ratchet member and provided with a pawl to engage said ratchet member, and a worm engaging the worm gear, said worm and gear being irreversible.


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2603976 *Jul 12, 1949Jul 22, 1952Hilton Albert HWrench
US3272037 *May 20, 1964Sep 13, 1966Bruehl Jerome JMechanical turning tool unit
US3630106 *Nov 19, 1969Dec 28, 1971Olinger Oliver DSocket wrench
US4474089 *Aug 30, 1982Oct 2, 1984Scott Stephen SScrew handle ratchet
US6978700 *Feb 4, 2005Dec 27, 2005Terence ChenWrench assembly
US7588573 *Sep 16, 2003Sep 15, 2009Warsaw Orthopedic, Inc.Expansion tool for adjustable spinal implant
US7608078Nov 23, 2005Oct 27, 2009Warsaw Orthopedic, Inc.Expansion apparatus for adjustable spinal implant
US20040059271 *Sep 16, 2003Mar 25, 2004Sdgi Holdings, Inc.Expansion tool for adjustable spinal implant
US20050126346 *Feb 4, 2005Jun 16, 2005Terence ChenWrench assembly
US20050211434 *Feb 4, 2005Sep 29, 2005Gates Ian DProcess for in situ recovery of bitumen and heavy oil
US20060084975 *Nov 23, 2005Apr 20, 2006Sdgi Holdings, Inc.Expansion apparatus for adjustable spinal implant
US20070125203 *Dec 7, 2005Jun 7, 2007Bill NguyenWorm, worm gear wrench
US20090025516 *Jul 27, 2007Jan 29, 2009Vincent SamudoskyPowered wrench
US20100016971 *Sep 25, 2009Jan 21, 2010Warsaw Orthopedic, Inc.Adjustable Spinal Implant
U.S. Classification81/57.29, 74/424.7, 81/57.46, 81/61, 74/126
International ClassificationB25B13/46, B25B13/00
Cooperative ClassificationB25B13/467
European ClassificationB25B13/46B3