US679468A - Crutch. - Google Patents

Crutch. Download PDF

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Publication number
US679468A
US679468A US1900036922A US679468A US 679468 A US679468 A US 679468A US 1900036922 A US1900036922 A US 1900036922A US 679468 A US679468 A US 679468A
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US
United States
Prior art keywords
foot
crutch
tread
seat
ferrule
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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Inventor
Philip W Pratt
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Philip W Pratt
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Priority to US1900036922 priority Critical patent/US679468A/en
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Publication of US679468A publication Critical patent/US679468A/en
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Application status is Expired - Lifetime legal-status Critical

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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61HPHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H3/00Appliances for aiding patients or disabled persons to walk about
    • A61H3/02Crutches
    • A61H3/0288Ferrules or tips therefor
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61HPHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H3/00Appliances for aiding patients or disabled persons to walk about
    • A61H3/02Crutches
    • A61H3/0288Ferrules or tips therefor
    • A61H2003/0294Ferrules or tips therefor comprising a ball-and-socket joint
    • 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
    • Y10T16/00Miscellaneous hardware [e.g., bushing, carpet fastener, caster, door closer, panel hanger, attachable or adjunct handle, hinge, window sash balance, etc.]
    • Y10T16/18Casters
    • Y10T16/209Sliding
    • 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
    • Y10T16/00Miscellaneous hardware [e.g., bushing, carpet fastener, caster, door closer, panel hanger, attachable or adjunct handle, hinge, window sash balance, etc.]
    • Y10T16/39Ferrules, rings, and thimbles

Description

No. 679,468. Patented luly 30, |901. P. W. PRATT.

CBUTCH.

(Applicationled Nov. 19, 1900.)

(No Model.)

n u' 1E Sk? im 1d@ MATHESSBS: I

UNITED STATES PATENT OFFICE.

PHILIP lV. PRATT, OF BOSTON, MASSACHUSETTS.

CRUTCH.

SPECIFICATION forming part Of Letters Patent N0. 679,468, dated July 30, 1901.

Application led November 19, 1900. Serial No. 36,922. (No model.)

.To all whom t may concern,.-

Beit known that I, PHILIP W. PRATT, of Boston, in the county of Suolk and State of Massachusetts, have invented certain new and useful Improvements in Crutches, of which the following is a speciiication.

This invention has for its object to provide a crutch with an elastic tread for the tip of the crutch adapted to have a tipping Inovement relatively to the crutch stick or body, so that the tread can stand at any desired angle relatively to the crutch stick or body, and therefore bear squarely upon a pavement or iioor without regard to the angle at which the crutch-stick is held.

vThe invention also has for its object to enable the crutch-stick to have a rotary movement independently of the tread, so that when the user of the crutch gives the stick a partial rotary movement the tread will remain stationary in contact with the pavement or floor.

To these ends the invention consists in the improvements which I will now proceed to describe and claim.

Of the accompanying drawings,l forming a part of this specification, Figures 1 and 2 rep resent sectional views showing the lower portion of the crutch-stick and a tip applied thereto embodying my invention. Figs. 3 and I represent similar views showing a somewhat-different construction embodying said invention. Fig. 5 represents aside view of a crutch having a tip embodying my inven tion. Fig. 6 represents asectional view showing another embodiment of my invention. Fig. 7 represents a modification of the construction shown in Fig. 6.

The same reference characters indicate the same parts in all the figures.

Referring rst to Figs. l and 2, a represents the crutch stick or body, which may be of any suitable construction. b represents a foot, which is preferablya disk-shaped piece of metal and has a hinge member engaged with a complemental hinge member connected with the crutch-body in such manner as to permit the foot to have a tipping movement relatively to the crutch-body. The hinge member on the foot is here shown as aball c, connected by a neck c with the foot b. The hinge member connected with the crutchbody is here shown as a socket d, formed on a stud d, having a screw-threaded extension or shank d2, engaged with a tapped orifice in a socket or ferrule e, which is affixed to the lower end of the crutch-body. The two members c and d constitute a ball-and-socketl hinge, which permits the foot b to have a universal tipping movement, so that the foot will stand parallel with the floor or pavement when the crutch-stick is held in an inclined position relatively thereto, as indicated in Figs. 2 and 5. f represents an elastic tread which covers the under side of the foot b and is preferably ribbed or corrugated on its bottom surface. To maintain the foot b and treadf in their normal position--that is to say, with the bearing-surface of the foot substantially at right angles to the length of the crutch-stick-I provide the tread with a resilient flange f', which projects upwardly, surrounds the ball-` and-socket hinge, and is engaged at its upper end with an annular seat g, connected with the crutch-body. As shown in Figs. 1 and 2, the annular seat is a collar which is adapted to rotate loosely on the stud d and has anges at its upper and lower edges, the flange hav; ing a lip f2, which is elastic and is sprung into the space between said flanges, the inner sides of the flanges and the periphery of the collar constituting the seat. The loose rotation of the collar on the stud cl' permits the crutch-body to be turned or rotated on its longitudinal axis without a corresponding rotation of the tread and foot. h represents a flange formed on the ferrule e, said flange projecting downwardly and surrounding the lip f2 and the grooved member g, said flange serving to protect the upper portion of the resilient liange f and prevent the lip f2 from being sprung out of engagement with the seat g. Acup-shaped metal washer t' is preferably interposed between a shoulder on the stud d and the cup-shaped lower end of the ferrule e. An elastic washer j is preferably interposed between the bottom of the socket in the ferrule e and the lower end of the crutch-stick to prevent rattling of the ferrule.

I In the construction shown in Figs. 3 and 4 the socket member is a cavity K, formed in the ferrule e, the lower portion of said cavity being somewhat contracted to engage the ball member Z, which is afixed to a shank Z', se-

a screw-driver inserted in the ferrule.V

cured to the foo-t b. The ferrule e is provided with a grooved extension e', which constitutes the seat engaged with the lip f2 on the resilient ange of the treadf. In this embodiment of my invention the ferrule has a retaining- [lange 72, surrounding the lip f2 and the seat which engages said lip.-

It will be seen that the above-described improvement enables the tread to bear squarely against the Hoor or pavement when the crutch is inclined, as shown in Fig. 5, as well as when it is held vertical, as shown in Fig. 1.

It will be seen that the resilient iiange, which is integral with the tread, (both being made of elastic rubber or other like resilient materiaL) not only returns the tread and foot to their normal position after displacement, but also holds the tread in position on the foot and prevents access of dirt to the hinge.

In Fig. 6 I show the construction which in certain respects is preferred by me to either of those previously described. In said Fig. 6, k represents the ferrule, which is secured to the lower end of the crutch stick or body a, and has at its lower end a frusto-conical fiange c, the inner surface of which constitutes the seat for the resilient iiange f' of the elastic tread f. The fiange f' in this case is of frusto-conical form externally, its tapering upper end fitting in the tapering flange lo. The ferrule k is provided near its lower end with an internal shoulder k2. Above, said shoulder and engaged with an internal screwthread formed in the ferrule is an abutment k3, which is externally threaded and provided with a slot h4, whereby it may be rotated by The abutment 7c3 and shoulder 7a2 constitute a socket which confines and permits the partial rotation in any direction of a ball m. From the ball m projects downwardly a stud or shank m', to the lower end of which the foot b is secured by a screw m2. The upper portion of the fiange j" is in contact with the stud m and is held thereby in engagement with the seat on the lower end of the ferrule. It will be seen that the ball m and the socket in which it is inclosed constitute a hinge con-4 nection between the foot and the ferrule lo and that the resilient iange f of the treadf cooperates with the seat on the lower end of the ferrule in returning the foot to its normalv position after displacement and in excluding dust, &c., from the hinge. The fiange f is preferably recessed internally to form a cavity f4, surrounding the shank m', this cavity increasing the compressibility of the flange f and enabling it to yield more readily to permit the tipping of the foot than would be the prefer to interpose a conical washer o between the flange k' .on the ferrule and the elastic fiangef on the tread, said washer being loose and adapted to slip upon the flange k. The washer o constitutes the acting portion of' the seat for the flange f and enables said flange with the tread f, foot b, stud m', and ball m to stand stationary while the crutch-stick and the ferrule 7c are being partially rotated, the washer o serving in this respect the same purpose as the collar g shown in Figs. l and 2. p represents a loose disk interposed between the abutment 7c3 and the ball fm.

In Fig. 7 l show a plug q, of cork, inserted in a cavity formed for its reception in the elastic tread f, the lower end of said tread forming a part of the tread-surface and decreasing the liability of the tread-surface to slip upon wet surfaces.

I do not limit myself to the details of construction here described, as the same may be variously modified without departing from the spirit of my invention. The hinge may be' of any desired form and adapted to give the foot a tipping movement on a single axis instead of a universal tipping movement.

I claiml. A crutch comprising a body portion having a rigid annular seat at its lower end portion, a foot below said seat, hinge members connected respectively with the foot and with the body, and permitting a tipping motion of the foot, and an elastic tread bearing on the foot and movable therewith, said tread having an upwardly-projecting resilient flange or sleeve surrounding the foot and engaged at its upper end with said annular seat, whereby the tread and foot are yieldingly maintained in their normal position, the flange also serving to exclude dust, dac., from the hinge members.

2. A crutch comprising a body portion having a rigid annular seat at its lower portion, a foot below said seat, hinge members connected respectively with the foot and with the body, and permitting a tipping motion of the foot, and an elastic tread bearing on the foot and movable therewith, said tread having an upwardly-projecting resilient flange or sleeve surrounding the foot and engaged at its up- `per end with said annular seat, whereby the tread and foot are yieldingly maintained in their normal position, the said seat being loose so that the body can be rotated independently ofthe foot.

v 3. A crutch comprising a body portion having a conical seat at its lower end and a socket y hinge member above said seat, a stud having a ball hinge member engaged with said socket member, the stud projecting downwardly through the conical seat, a foot affixed to the lower end of the stud and an elastic tread affixed to the foot and having an upwardlyprojecting resilient flange or sleeve having a conicalupper portion which bears upon the conical seat. case 1f the recess f4 were not provided. I

4. A crutch comprising a body portion having a conical seat at its lower end and a socket hinge member above said seat, a stud having a ball hinge member engaged with said socket member, the stud projecting downwardly through the conical seat, a foot afxed to the lower end of the stud and an elastic tread aixed to the foot and having an upwardly- IOO IIO

fst/9,468 V 8 projecting resilient flange or sleeve having a below the ferrule, a foot secured to the lower conical upper portion which bears upon the end of said stem, and an elastic tread secured conical seat, the seat being loose so that the l to the foot and having an upwardly-project- I5 body portion can be rotated independently of l ing resilient flange or sleeve which is seated 5 the foot-tread and i'lange. on the lower portion of the ferrule.

5. A crutch-tip comprising a fel-rule adapt- In testimony whereof I have affixed my siged to receive a crutch stick or body, and pronature in presence of two Witnesses. vided internally with a shoulder near its lower end, and with an abutment above said shoul- 1o der, the shoulder and abutment constituting Witnesses:

a socket member, a ball member contained l C. F. BROWN, in said socket and having a stem projecting PHILIP W. PRATT.

E. BATCHELDER.

US1900036922 1900-11-19 1900-11-19 Crutch. Expired - Lifetime US679468A (en)

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Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2885719A (en) * 1957-08-19 1959-05-12 American Seating Co Furniture glide
US2942829A (en) * 1957-04-24 1960-06-28 Theophile A Stiffel Self adjustable leveling means
US3025557A (en) * 1959-04-28 1962-03-20 United Carr Fastener Corp Furniture glide
US3230880A (en) * 1962-09-20 1966-01-25 Millard B Beaver Type having flexible base of varying thickness to form hinge means
US4510957A (en) * 1981-08-05 1985-04-16 S & F Orthopadietechnik Gmbh Resilient support foot for walking aids, particularly crutches
US4630626A (en) * 1985-02-11 1986-12-23 Lamico, Inc. Crutch tip construction
US4708154A (en) * 1985-12-05 1987-11-24 Edwards Robert J Nonslip crutch foot assembly
US5088513A (en) * 1986-02-12 1992-02-18 Schilling-Ostermeyer Maschinenbau Gmbh Support leg for stick-shaped walking aids
US5193567A (en) * 1991-10-29 1993-03-16 Razny Jr Frank R Mobility enhancement device
US5282486A (en) * 1992-07-27 1994-02-01 Hoover L Wayne Crutch with power lift and foot and method of using same
US5307828A (en) * 1993-06-04 1994-05-03 Gardner Donald J Support foot assembly
US5402587A (en) * 1994-02-10 1995-04-04 Buschbacher; Ralph Hinged flexible walker assembly
US5571065A (en) * 1995-07-21 1996-11-05 Buitoni; Gian L. L. Arm extension exercise device
US20050055977A1 (en) * 2003-09-15 2005-03-17 Tetsuji Kawakami Nonslip walking stick rest
US20070144568A1 (en) * 2005-12-13 2007-06-28 University Of Maryland Crutch-like mobility assist device with rotatable footer assembly
US20080035193A1 (en) * 2006-08-11 2008-02-14 Baker William H Foot assembly for a walking aid
US20090026346A1 (en) * 2007-07-26 2009-01-29 Makita Corporation Support leg devices and cutting tools having the support leg devices
US20110094552A1 (en) * 2009-10-27 2011-04-28 King-Chang Wu Walking Stick With All-Rounded Support
US20120097828A1 (en) * 2010-10-21 2012-04-26 Burns Martin P Resilient foot
GB2494906A (en) * 2011-09-23 2013-03-27 Gdf Medical Ltd A support foot having a resiliently biased pivot
US9386830B2 (en) * 2014-10-02 2016-07-12 Hurryworks Llc Walking aid device
US20170156459A1 (en) * 2015-12-03 2017-06-08 Shyh Min Chen Adaptive Pivoting and Impact Reduction Tip Assembly for Walking Aids
US9681714B1 (en) * 2016-11-11 2017-06-20 Superior Mechanical Solutions Corp. Automatic direction-correcting apparatus for a cane
US9955760B2 (en) * 2015-12-03 2018-05-01 3C Automation, Inc. Adaptive pivoting and impact reduction tip assembly for walking aids

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2942829A (en) * 1957-04-24 1960-06-28 Theophile A Stiffel Self adjustable leveling means
US2885719A (en) * 1957-08-19 1959-05-12 American Seating Co Furniture glide
US3025557A (en) * 1959-04-28 1962-03-20 United Carr Fastener Corp Furniture glide
US3230880A (en) * 1962-09-20 1966-01-25 Millard B Beaver Type having flexible base of varying thickness to form hinge means
US4510957A (en) * 1981-08-05 1985-04-16 S & F Orthopadietechnik Gmbh Resilient support foot for walking aids, particularly crutches
US4630626A (en) * 1985-02-11 1986-12-23 Lamico, Inc. Crutch tip construction
US4708154A (en) * 1985-12-05 1987-11-24 Edwards Robert J Nonslip crutch foot assembly
US5088513A (en) * 1986-02-12 1992-02-18 Schilling-Ostermeyer Maschinenbau Gmbh Support leg for stick-shaped walking aids
US5193567A (en) * 1991-10-29 1993-03-16 Razny Jr Frank R Mobility enhancement device
US5282486A (en) * 1992-07-27 1994-02-01 Hoover L Wayne Crutch with power lift and foot and method of using same
US5307828A (en) * 1993-06-04 1994-05-03 Gardner Donald J Support foot assembly
US5402587A (en) * 1994-02-10 1995-04-04 Buschbacher; Ralph Hinged flexible walker assembly
US5571065A (en) * 1995-07-21 1996-11-05 Buitoni; Gian L. L. Arm extension exercise device
US20050055977A1 (en) * 2003-09-15 2005-03-17 Tetsuji Kawakami Nonslip walking stick rest
US6883530B2 (en) * 2003-09-15 2005-04-26 Tetsuji Kawakami Nonslip walking stick rest
US7581556B2 (en) 2005-12-13 2009-09-01 University Of Maryland Crutch-like mobility assist device with rotatable footer assembly
US20070144568A1 (en) * 2005-12-13 2007-06-28 University Of Maryland Crutch-like mobility assist device with rotatable footer assembly
US7588044B2 (en) 2006-08-11 2009-09-15 Baker William H Foot assembly for a walking aid
US20080035193A1 (en) * 2006-08-11 2008-02-14 Baker William H Foot assembly for a walking aid
US8079294B2 (en) * 2007-07-26 2011-12-20 Makita Corporation Support leg devices and cutting tools having the support leg devices
US8424433B2 (en) 2007-07-26 2013-04-23 Makita Corporation Support leg devices and cutting tools having the support leg devices
US20090026346A1 (en) * 2007-07-26 2009-01-29 Makita Corporation Support leg devices and cutting tools having the support leg devices
US8176927B2 (en) * 2009-10-27 2012-05-15 King-Chang Wu Walking stick with all-rounded support
US20110094552A1 (en) * 2009-10-27 2011-04-28 King-Chang Wu Walking Stick With All-Rounded Support
US20120097828A1 (en) * 2010-10-21 2012-04-26 Burns Martin P Resilient foot
US9765919B2 (en) * 2010-10-21 2017-09-19 Component Hardware Group, Inc. Resilient foot
GB2494906A (en) * 2011-09-23 2013-03-27 Gdf Medical Ltd A support foot having a resiliently biased pivot
US9386830B2 (en) * 2014-10-02 2016-07-12 Hurryworks Llc Walking aid device
US20170156459A1 (en) * 2015-12-03 2017-06-08 Shyh Min Chen Adaptive Pivoting and Impact Reduction Tip Assembly for Walking Aids
US9737121B2 (en) * 2015-12-03 2017-08-22 3C Automation, Inc. Adaptive pivoting and impact reduction tip assembly for walking aids
US9955760B2 (en) * 2015-12-03 2018-05-01 3C Automation, Inc. Adaptive pivoting and impact reduction tip assembly for walking aids
US9681714B1 (en) * 2016-11-11 2017-06-20 Superior Mechanical Solutions Corp. Automatic direction-correcting apparatus for a cane

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