US2576751A - Expansible tool handle - Google Patents

Expansible tool handle Download PDF

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Publication number
US2576751A
US2576751A US637991A US63799145A US2576751A US 2576751 A US2576751 A US 2576751A US 637991 A US637991 A US 637991A US 63799145 A US63799145 A US 63799145A US 2576751 A US2576751 A US 2576751A
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Prior art keywords
handle
sections
expansible
wedge
opening
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Expired - Lifetime
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US637991A
Inventor
Paul H Dortmund
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Paul H Dortmund
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Priority to US637991A priority Critical patent/US2576751A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25DPERCUSSIVE TOOLS
    • B25D1/00Hand hammers; Hammer heads of special shape or materials
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25GHANDLES FOR HAND IMPLEMENTS
    • B25G1/00Handle constructions

Description

NOV' 27, 1951 P. H. DQRTMUND Y EXPANSIBLE TOOL HANDLE Filed Deo. 29, 1945 BZYDWZ Dormuntl Patented Nov. 27,VV 1951 UNITED STATES PATENT OFFICE EXPANSIBLE TOOL HANDLE Paul H. Dortmund, Columbus, Ohio Application December Z9, 1945, Serial No. 637,991

(Cl. 145-61) v 5 Claims.

`means for gradually strengthening and stretching damaged hand muscles to the extent of restoring the same to normal usage.

It is, therefore, an object of my invention to provide a tool or implement handle that is adjustable so as to vary the size of the gripping portion thereof.

It is another object of my invention to provide a tool handle that may vbe used, due to the adjustable size of its gripping surface, in the therapeutic treatment of hand injuries.

For a further and more complete understanding of my proposed tool handle, reference is made to the following description and accompanying drawing, wherein:

Fig. 1 is a vertical elevational side view of my improved handle in use with a hammer head;

Fig. 2 is a vertical cross-sectional View showing the handle in its normal or contracted condition;

Fig. 3 is a similar View showing the handle in its expanded or enlarged condition;

Fig. 4 is a bottom elevational view of my proposed handle, disclosing the triangular adjusting head;

Fig. 5 is a perspective view of the wrench used in the adjustment of the expansible handle;

Fig. 6 is a horizontal cross sectional view taken along the line 6-6 of Fig. 3.

As shown in the drawings, my expansible handle comprises a longitudinally split body I forming a pair of resiliently separable gripping sections II and I2. The adjoining faces of the gripping sections II and I2 are so shaped as to form an internal tapering chamber I3, a relatively cylindrical shaped chamber I4, and a relatively smaller tubular channel I which joins the two chambers I3 and I4 and extends through said body to a circular recess I5 in the bottom end of the handle.

4A wedge element I6 is located Within the internal tapering chamber I3 and contains a threaded channel through its center. The wedge element I6 is in operating engagement with a threaded shaft Il introduced through the bottom of the handle within the tubular channel l5. The outer end of the shaft Il terminates in a triangular nut I8 adapted to be operated by a special triangular socket wrench 25.

A ferrule I9 is applied around the outer portion of the bottom end of the handle and serves to hold the ends of the gripping sections II and I 2 together.

When it is desired to expand the gripping surface of the handle, the triangular nut I8 is rotated by the wrench 25, in turn the wedge I6 is drawn down the shaft Il and exerts an outward force against the walls of the tapered chamber I3, thereby moving the gripping sections II and I2..

'I'he handle remains in the expanded position until the shaft I'I is rotated in the opposite direction, thereby removing the forces applied through the wedge I6. An elastic covering 20 may be used over the gripping sections Il and I2 to absorb a part of the impact shock produced by use of the tool and serves to provide a soft smooth surface for the hand of a person using the tool.

The purpose of the triangular nut I8 and the special Wrench 25 is to provide a means whereby the handle may be expanded under the supervision of a person controlling the treatment of a patient using my improved handle, said supervisor retaining possession of the wrench 25 so that the patient will be unable to change th adjustment of the handle.

In view of the foregoing, it will be seen that my invention provides a simple expansible handle for tools and other implements adapted to be used particularly for the therapeutic treatment of hand injuries. For example, a patient starting treatment will use the handle in an extremely expanded condition, and as the patient progresses, the handle will be gradually contracted at intervals until the patient is able to use an ordinary sized handle. In this way, the patient may eventually realize the full use of his hands again.

My invention is characterized by its simplicity of construction and ease of operation.

While I have disclosed what I deem to be a preferred form of my invention, it will be understood that minor changes of construction and design may be made without departing from the spirit and scope of the following claims.

therein to resiliently expand the intermediatel portions of said sections, and externally .accessible means extending within said opening and engageable with said wedge-:shapedfelement'for imparting longitudinal movement to the latter.

2. An expansible implement handle comprising a pair of resiliently separable handle sections having opposed and longitudinally extending inner surfaces, means :rigidly clamping the lrespective end 'portionsof said handle sections .to-

vgetlier, the opposed inner surfaces of said sections being recessed intermediate their enden-nd forming 'in vsaid handle an yopening having longi tudinally tapered side wallsya Wedgeelement slid ably positioned 'between and in :engagement with the foppcsed surfaces of :said f sections Within said opening andimovablelongitudinally therein to resiliently separate said sections intermediate :their ends, and .means .accessible freni .one end of ,said handle section 'and Vconnected 'with ssaid `Wedge element for imparting movement thereto.

` 3. AAn expansible implement handle comprising a 'pair of .elongated :independent resiliently .separable 'gripping sections arranged v in longitudinally extending opposed order means clamping 'the respective .ends of Said .sections against separation, said .sections being :recessed along their intermediate opposed .surfaces ,and :forming :in :said handle an .opening :having :longitudinally tapered yside Walls, a Wedge-shaped element .positioned iin fsaid opening ,and abutting `the side `fafa-ils therecfand movable longitudinally @of said Iripening :for resiliently separating ithe intermediate portions of said sections, and a threaded shaft y'accessible from one end of said gripping sections and having threaded engagement with saidwedge-shaped i element and operable :to :move t'he latter .longitudinally .of said opening.

e4. vAn expansible implement handle comprising =;a pair pi :independent resiliently separable 'grip- .4 ping sections arranged in longitudinally extending opposed order socketed means connected with the respective ends of said sections for rigidly holding the respective ends of said sections against separation, said sections being recessed along their intermediate opposed surfaces and forming in said handle an opening having longitudinally tapered side Walls, a wedge-shaped element Acarried between the sidewalls .of Asaid open- ;ing .and movable longitudinally aof said opening for resiliently separating the intermediate portions of said sections, a threaded shaft accessible from one of said gripping sections and having threaded engagement with said Wedge-shaped elementand operable to move the latter longitudinally of said opening, and a covering of elas- -tic material Vsnrrounnding the intermediate outer portions of said gripping sections.

5. An expansive implement handle comprising a pair of elongated resiliently separable handle sections having opposed and longitudinally extending inner surfaces, meansconnected withthe respective endV portions of'said handle `sections and rigidly uniting the same fagains't relative separation, the opposed inner surfaces loi' said sections being recessed @intermediate their :ends and forming 5in said handle an opening having longitudinally tapered side vvalls,ra wedge element -slidably carried 'between Athe r'side Walls :o'f said opening andmevable l'longlitudinally.of said opening vvto resiliently separate said sections I'intermediate :their ends, means 4accessible from one-end yci' said 'handle Vsections and connected with `said Wedge :element `for moving said Wedge -element iongitudinally vcf said opening, and :a-coveringfo'f elastic material .surrounding ythe 'intermediate Vouter-surfaces of saidhandlesections. f

PAUL H.'DORTMU'ND.

REFERENCES CITED i.The following references Aare of record in 1the l'e of this patent:

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US637991A 1945-12-29 1945-12-29 Expansible tool handle Expired - Lifetime US2576751A (en)

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3132548A (en) * 1961-09-25 1964-05-12 Reed Roller Bit Co Pre-set torque release wrench
US3833218A (en) * 1973-03-14 1974-09-03 R Frenkel Game racket
US3915021A (en) * 1973-03-14 1975-10-28 Allan E Schwartz Mechanism for varying diameter of a body
US3968965A (en) * 1973-03-14 1976-07-13 Frenkel Richard E Game racket
US4850079A (en) * 1988-09-14 1989-07-25 Thompson Franklin B Fatigue-reducing handle grip and handle attachment for same
US5263275A (en) * 1992-04-10 1993-11-23 Berkley, Inc. Variable circumference rod handle
US6030302A (en) * 1997-08-22 2000-02-29 Dunlop Slazenger Group Limited Games rackets
EP1046516A1 (en) * 1999-04-22 2000-10-25 A.T.X. International, Inc. Variable contour grip
US20060083576A1 (en) * 2004-10-15 2006-04-20 Micro Co., Ltd. Hand-held instrument having variable contour grip
US20060207391A1 (en) * 2005-03-17 2006-09-21 John Chen Hammer having enhanced strength
US20090139380A1 (en) * 2007-12-04 2009-06-04 Marshalltown Company Adjustable tool handle
US20100056308A1 (en) * 2006-11-23 2010-03-04 Babolat Vs Racket handle insert and corresponding handle and racket
US20100214470A1 (en) * 2007-08-27 2010-08-26 Caman Sa Adjustable handle, particularly for camera
US20120184403A1 (en) * 2009-10-21 2012-07-19 Eric Loreau Handle-expander element for a racket handle, a set of handle-expander elements, a handle-expander, and a corresponding method
US10005177B2 (en) * 2016-06-06 2018-06-26 GM Global Technology Operations LLC Adjustable grip size for curved or straight grip

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB189517843A (en) * 1895-09-24 1896-08-01 Charles Louis Mercier Improvements appertaining to the Handles of Cycles.
US851707A (en) * 1905-06-16 1907-04-30 Leonard F Tarbell Handle for hammers or the like.
US890509A (en) * 1907-04-25 1908-06-09 Hiram Hall Ax-helve.
US894155A (en) * 1907-05-04 1908-07-21 Cary W Layton Tool-handle.
US914846A (en) * 1905-05-17 1909-03-09 Henry V Jones Handle-fastening.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB189517843A (en) * 1895-09-24 1896-08-01 Charles Louis Mercier Improvements appertaining to the Handles of Cycles.
US914846A (en) * 1905-05-17 1909-03-09 Henry V Jones Handle-fastening.
US851707A (en) * 1905-06-16 1907-04-30 Leonard F Tarbell Handle for hammers or the like.
US890509A (en) * 1907-04-25 1908-06-09 Hiram Hall Ax-helve.
US894155A (en) * 1907-05-04 1908-07-21 Cary W Layton Tool-handle.

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3132548A (en) * 1961-09-25 1964-05-12 Reed Roller Bit Co Pre-set torque release wrench
US3833218A (en) * 1973-03-14 1974-09-03 R Frenkel Game racket
US3915021A (en) * 1973-03-14 1975-10-28 Allan E Schwartz Mechanism for varying diameter of a body
US3968965A (en) * 1973-03-14 1976-07-13 Frenkel Richard E Game racket
US4850079A (en) * 1988-09-14 1989-07-25 Thompson Franklin B Fatigue-reducing handle grip and handle attachment for same
US5263275A (en) * 1992-04-10 1993-11-23 Berkley, Inc. Variable circumference rod handle
US6030302A (en) * 1997-08-22 2000-02-29 Dunlop Slazenger Group Limited Games rackets
EP1046516A1 (en) * 1999-04-22 2000-10-25 A.T.X. International, Inc. Variable contour grip
US6146038A (en) * 1999-04-22 2000-11-14 A.T.X. International, Inc. Variable contour grip
SG85695A1 (en) * 1999-04-22 2002-01-15 Atx Int Inc Variable contour grip
US7367735B2 (en) * 2004-10-15 2008-05-06 Micro Co., Ltd. Hand-held instrument having variable contour grip
US20060083576A1 (en) * 2004-10-15 2006-04-20 Micro Co., Ltd. Hand-held instrument having variable contour grip
US20060207391A1 (en) * 2005-03-17 2006-09-21 John Chen Hammer having enhanced strength
US8298101B2 (en) * 2006-11-23 2012-10-30 Babolat Vs Racket handle insert and corresponding handle and racket
US20100056308A1 (en) * 2006-11-23 2010-03-04 Babolat Vs Racket handle insert and corresponding handle and racket
US8373762B2 (en) * 2007-08-27 2013-02-12 Caman Sa Adjustable handle, particularly for camera
US20100214470A1 (en) * 2007-08-27 2010-08-26 Caman Sa Adjustable handle, particularly for camera
US7621023B2 (en) 2007-12-04 2009-11-24 Marshalltown Company Adjustable tool handle
US20090139380A1 (en) * 2007-12-04 2009-06-04 Marshalltown Company Adjustable tool handle
WO2009073238A1 (en) * 2007-12-04 2009-06-11 Marshalltown Company Adjustable tool handle
US20120184403A1 (en) * 2009-10-21 2012-07-19 Eric Loreau Handle-expander element for a racket handle, a set of handle-expander elements, a handle-expander, and a corresponding method
US10005177B2 (en) * 2016-06-06 2018-06-26 GM Global Technology Operations LLC Adjustable grip size for curved or straight grip

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