US2013765A - Spring for ratchet mechanisms - Google Patents

Spring for ratchet mechanisms Download PDF

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Publication number
US2013765A
US2013765A US610102A US61010232A US2013765A US 2013765 A US2013765 A US 2013765A US 610102 A US610102 A US 610102A US 61010232 A US61010232 A US 61010232A US 2013765 A US2013765 A US 2013765A
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US
United States
Prior art keywords
spring
coils
bore
engagement
enlarged
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
Application number
US610102A
Inventor
Led L Richardson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CLEVELAND ROCK DRILL Co
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CLEVELAND ROCK DRILL CO
Priority date (The priority date 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 date listed.)
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Publication date
Application filed by CLEVELAND ROCK DRILL CO filed Critical CLEVELAND ROCK DRILL CO
Priority to US610102A priority Critical patent/US2013765A/en
Application granted granted Critical
Publication of US2013765A publication Critical patent/US2013765A/en
Anticipated expiration legal-status Critical
Application status is Expired - Lifetime legal-status Critical

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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B6/00Drives for combined percussion and rotary drilling
    • E21B6/06Drives for combined percussion and rotary drilling the rotation being intermittent, e.g. obtained by ratchet device
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00Machine element or mechanism
    • Y10T74/18Mechanical movements
    • Y10T74/18056Rotary to or from reciprocating or oscillating
    • Y10T74/18288Cam and lever

Description

Patented Sept. 10, 1935 UNITED STATES PATENT OFFICE Application May 9, 1932, Serial No. 610,102

1 Claim.

This invention relates broadly to ratchet mechanism but more specifically to improvements in the springs associated with the ratchet mechanism used in connection with rock drills.

In constructing a ratchet mechanism for rock drills; it is the common practice to provide a ried bar having a head within which is drilled a plurality of restricted bores. Co-operating with this rifled bar, there is a ratchet ring which is connected thereto by a plurality of pawls actuated by a spring pressed plunger longitudinally movable within the restricted bores. Heretofore, the springs were wound substantially cylindrical with an outside diameter somewhat smaller than the diameter of the bore, permitting thereby the frictional engagement of its coil with the inner peripheral wall of the bore. Due to the rapid compression and expansion of the spring, the coils thereof, rubbing against the inner wall of the bore, would prematurely wear and cause the breakage of the spring, increasing thereby the cost of operation.

It is among the objects of this invention to provide a ratchet mechanism for rock drills with the spring having the coils subjected to mechanical stress, being free of frictional engagement with the inner peripheral wall of the bore within which the spring is mounted, preventing thereby a premature wear and breakage of the spring as well as reducing the cost of operation.

Other objects more or less ancillary to the foregoing and the manner in which the above mentioned object is realized, will appear in the following description, which considered in connection with the accompanying drawing, sets forth the preferred embodiment of the invention.

In the drawing:

Fig. 1 is a longitudinal view, partly in section, of a rock drill representative of one of the types of machines in winch the ratchet mechanism may be incorporated.

Fig. 2 is an enlarged cross sectional view taken in a plane indicated by line 2--2 in Fig. l, illustratlng the ratchet mechanism with the springs incorporated therewith.

Fig. 3 is an enlarged longitudinal view of the spring.

The embodiment herein chosen to illustrate the present invention is a rock drill of the hammer type which comprises a cylinder Ill within which there is mounted a piston I I formed with an extended stem portion or hammer I2, adapted to co-operate with the head of a cutting tool I3 in the manner customarily employed in percussive rock drills. Mounted within the rearward end of the cylinder, there is a valve block Il having a valve I5 reciprocable therein for controlling the admission of motive fluid within the cylinder I0 to actuate the piston Il. The Valve block I4 is maintained within the cylinder I0 by the co-operation of a back head I6 which is secured by a pair of side bolts (not shown). During the drilling operation, i. e. when the hammer I2 is delivering its blows to the cutting tool I3, it is necessary to rotate the cutting tool. 10 For this purpose there is provided a rotation mechanism, comprising a rie bar or stem I'I which is slidably cngageable within the head of the piston II in a bore of complemental conguration. The rifled stem Il is provided with an enlarged head I8 within which there is drilled a plurality of restricted bores I9. Within each of said bores there is reciprocably disposed a plunger subjected to the action of a compression spring 2l disposed rearwardly thereof. Toward its ends, 20 the spring is manufactured with enlarged coils of an outside diameter substantially equal to the diameter of the bore I9, and capable of engagement with the inner peripheral wall of the bore I9, for guiding the spring in axial alignment with the plunger 20. These last coils are closed in upon each other as shown at 22 for the purpose which will be explained later. Pivotally secured within the enlarged head I8, there is a plurality of pawls 23 upon which the spring pressed 30 plungers 20 are acting to maintain the free end thereof away from the enlarged head I8. This head and its appurtenances is encompassed within a ring 24, having its inner peripheral wall provided with a plurality of longitudinally disposed teeth 25 with which the free ends of the pawls 23 are `capable of intermittent engagement. y

During the forward stroke of the piston II, the rifled bar I1, by reason of its engagement with the piston II, is made to rotate in one direction. During this motion, the free end of the pawls 23 in engagement with the plunger 20, Will pass over the teeth 25 and will cause a rapid compression and expansion of the springs 2I. The working coils of the spring, i. e. the coils intermediate the enlarged coils thereof, being of an outside diameter smaller than the internalA diameter of the bores I9, are free from frictional engagement with the inner peripheral wall of the bore I9 and consequently are not subjected 50 to wear. 'I'he enlarged coils in engagement with the inner peripheral wall of the bore I9 to guide the spring in axial alignment therewith, are closed in upon each other to prevent the compression or expansion thereof. These enlarged 55 coils are subjected to wear but are free of mechanical stress, preventing thereby the combination of wear and mechanical stress resulting in the breakage oi the coils.

Although the foregoing description is necessarily of a. detailed character in order to completely set forth the invention, it is to be understood that the specific terminology is not intended to be restrictive or coniining and it is to be further understood that various rearrangements of parts and modication of structural detail may be resorted to without departing from the scope or spirit of the invention as herein claimed.

I claim:

Y :A helical compression spring Vformed of compressible and non-compressible coils, said noncompressible coils constituting the ends of said spring, the diameter of said last coils being substantially equal to that of a bore within which said spring may be disposed, permitting thereby the engagement of said last coils with the inner wall of said bore so as to center said spring therein, the diameter of each ef said compressible coils being substantially equal but smaller than that of said non-compressible coils, thus causing an equal deection of the compressible coils when a load is applied to the spring and preventing the possible engagement of said compressible coils with the inner wall of said bore.

LED L. RICHARDSON.V Y Y

US610102A 1932-05-09 1932-05-09 Spring for ratchet mechanisms Expired - Lifetime US2013765A (en)

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Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2662753A (en) * 1951-12-08 1953-12-15 Birtman Electric Co Food mixer
US2729997A (en) * 1954-07-06 1956-01-10 Kell Strom Tool Co Inc Hydraulically controlled reversible ratchet wrench
US2772763A (en) * 1951-01-12 1956-12-04 Williams J H & Co Ratchet wrench
US2983196A (en) * 1947-07-30 1961-05-09 United Shoe Machinery Corp Feeding mechanism for gas piston operated gun
FR2147674A5 (en) * 1971-07-26 1973-03-09 Creative Tools
US4466523A (en) * 1982-06-29 1984-08-21 The Stanley Works Ratchet mechanism
US6070501A (en) * 1998-08-31 2000-06-06 Snap-On Tools Company Mini ratcheting screwdriver with latching swiveling handle
US6349619B1 (en) * 2000-09-07 2002-02-26 Yung Chung Liao Ratchet driving tool
US20060021836A1 (en) * 2004-07-27 2006-02-02 John Kimes Overrunning clutch
US20060021841A1 (en) * 2004-07-27 2006-02-02 John Kimes Ratcheting one-way clutch having rockers actuated by centrifugal force
US20060021835A1 (en) * 2004-07-27 2006-02-02 John Kimes Overrunning clutch
US20060021839A1 (en) * 2004-07-27 2006-02-02 John Kimes Ratcheting one-way clutch having rockers retained in closed pockets
US20060025279A1 (en) * 2004-07-27 2006-02-02 Kimes John W Automatic transmission carrier assembly including an overrunning brake
US20060021840A1 (en) * 2004-07-27 2006-02-02 John Kimes Ratcheting one-way clutch having rockers
US20060021838A1 (en) * 2004-07-27 2006-02-02 John Kimes Ratcheting one-way clutch having piloted surfaces
US20060021837A1 (en) * 2004-07-27 2006-02-02 John Kimes Overrunning clutch
US20060185957A1 (en) * 2004-07-27 2006-08-24 Kimes John W Dual-mode one-way torque transmitting device
US20060285443A1 (en) * 2002-12-06 2006-12-21 Michael Vogt World timepiece
US20070062775A1 (en) * 2004-07-27 2007-03-22 Bird Norm J Retention of an actuating spring in a one-way clutch or brake
US20070131509A1 (en) * 2004-07-27 2007-06-14 Kimes John W Preventing ratcheting on rockers of a one-way clutch
US7237459B1 (en) * 2006-05-19 2007-07-03 Hsuan-Sen Shiao Ratchet screwdriver
US20080185253A1 (en) * 2007-02-06 2008-08-07 Kimes John W Selectively controlled rocker one-way clutch
JP2014151436A (en) * 2013-02-08 2014-08-25 Kabo Tool Co Two-way ratchet, two-way ratchet wrench, and direction conversion method for two-way ratchet wrench
US9427861B2 (en) 2013-02-28 2016-08-30 Sicom Industries Ltd. Bit tool having a bit storage member, light assembly for a bit tool and bit tool having a ratcheting handle assembly

Cited By (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2983196A (en) * 1947-07-30 1961-05-09 United Shoe Machinery Corp Feeding mechanism for gas piston operated gun
US2772763A (en) * 1951-01-12 1956-12-04 Williams J H & Co Ratchet wrench
US2662753A (en) * 1951-12-08 1953-12-15 Birtman Electric Co Food mixer
US2729997A (en) * 1954-07-06 1956-01-10 Kell Strom Tool Co Inc Hydraulically controlled reversible ratchet wrench
FR2147674A5 (en) * 1971-07-26 1973-03-09 Creative Tools
US3742787A (en) * 1971-07-26 1973-07-03 Creative Tools Reversible drive ratchet hand tool with spherical handle
US4466523A (en) * 1982-06-29 1984-08-21 The Stanley Works Ratchet mechanism
US6070501A (en) * 1998-08-31 2000-06-06 Snap-On Tools Company Mini ratcheting screwdriver with latching swiveling handle
US6349619B1 (en) * 2000-09-07 2002-02-26 Yung Chung Liao Ratchet driving tool
US20060285443A1 (en) * 2002-12-06 2006-12-21 Michael Vogt World timepiece
US7307916B2 (en) * 2002-12-06 2007-12-11 Powermike.Com L.P. World timepiece
US7455156B2 (en) 2004-07-27 2008-11-25 Ford Global Technologies, Llc Overrunning clutch
US20060021839A1 (en) * 2004-07-27 2006-02-02 John Kimes Ratcheting one-way clutch having rockers retained in closed pockets
US20060025279A1 (en) * 2004-07-27 2006-02-02 Kimes John W Automatic transmission carrier assembly including an overrunning brake
US20060021840A1 (en) * 2004-07-27 2006-02-02 John Kimes Ratcheting one-way clutch having rockers
US20060021838A1 (en) * 2004-07-27 2006-02-02 John Kimes Ratcheting one-way clutch having piloted surfaces
US20060021837A1 (en) * 2004-07-27 2006-02-02 John Kimes Overrunning clutch
US20060185957A1 (en) * 2004-07-27 2006-08-24 Kimes John W Dual-mode one-way torque transmitting device
US7100756B2 (en) 2004-07-27 2006-09-05 Ford Global Technologies, Llc Overrunning clutch
US20060021835A1 (en) * 2004-07-27 2006-02-02 John Kimes Overrunning clutch
US20070062775A1 (en) * 2004-07-27 2007-03-22 Bird Norm J Retention of an actuating spring in a one-way clutch or brake
US20060021841A1 (en) * 2004-07-27 2006-02-02 John Kimes Ratcheting one-way clutch having rockers actuated by centrifugal force
US7223198B2 (en) 2004-07-27 2007-05-29 Ford Global Technologies, Llc Automatic transmission carrier assembly including an overrunning brake
US20070131509A1 (en) * 2004-07-27 2007-06-14 Kimes John W Preventing ratcheting on rockers of a one-way clutch
US7500548B2 (en) 2004-07-27 2009-03-10 Ford Global Technologies, Llc Dual-mode one-way torque transmitting device
US20060021836A1 (en) * 2004-07-27 2006-02-02 John Kimes Overrunning clutch
US7661518B2 (en) 2004-07-27 2010-02-16 Ford Global Technologies, Llc Preventing ratcheting on rockers of a one-way clutch
US7614486B2 (en) 2004-07-27 2009-11-10 Ford Global Technologies, Llc Retention of an actuating spring in a one-way clutch or brake
US7448481B2 (en) 2004-07-27 2008-11-11 Ford Global Technologies, Llc Ratcheting one-way clutch having rockers actuated by centrifugal force
US7451862B2 (en) 2004-07-27 2008-11-18 Ford Global Technologies, Llc Ratcheting one-way clutch having rockers retained in closed pockets
US7455157B2 (en) 2004-07-27 2008-11-25 Ford Global Technologies, Llc Ratcheting one-way clutch having rockers
US7383930B2 (en) 2004-07-27 2008-06-10 Ford Global Technologies, Inc. Overrunning clutch
DE102006009058B4 (en) * 2005-03-10 2016-09-22 Ford Global Technologies, Llc (N.D.Ges.D. Staates Delaware) Carrier assembly of a planetary gear set of a transmission
DE102006044851B4 (en) * 2005-09-28 2016-05-12 Ford Global Technologies, Llc Overrunning one way clutch
GB2430714A (en) * 2005-09-28 2007-04-04 Ford Global Tech Llc Ratcheting One-way Clutch
DE102006041780B4 (en) * 2005-09-28 2017-01-12 Ford Global Technologies, Llc Overrunning one way clutch
DE102006041816B4 (en) * 2005-09-28 2016-09-22 Ford Global Technologies, Llc Overrunning one way clutch
GB2430714B (en) * 2005-09-28 2010-09-29 Ford Global Tech Llc Ratcheting one-way clutch
US7237459B1 (en) * 2006-05-19 2007-07-03 Hsuan-Sen Shiao Ratchet screwdriver
US20080185253A1 (en) * 2007-02-06 2008-08-07 Kimes John W Selectively controlled rocker one-way clutch
US8491439B2 (en) 2007-02-06 2013-07-23 Ford Global Technologies, Llc Selectively controlled rocker one-way clutch
JP2014151436A (en) * 2013-02-08 2014-08-25 Kabo Tool Co Two-way ratchet, two-way ratchet wrench, and direction conversion method for two-way ratchet wrench
US9427861B2 (en) 2013-02-28 2016-08-30 Sicom Industries Ltd. Bit tool having a bit storage member, light assembly for a bit tool and bit tool having a ratcheting handle assembly

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