EP0004761A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
A crutch
Assignee: Individual
•
Filing: 1979-03-30
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Granted: —
•
Expires: 1999-03-30
Abstract
Abstract This invention relates to elbow crutches and provides a crutch to enable a patient with leg disability to raise himself from a sitting position to a standing position. Basically the invention consists in an elbow crutch, the length of which is adjustable under the control of a manually operable lever. In particular, the crutch comprises two telescopically arranged tubular members and a spring urging one tubular member outwardly with respect to the other. A rock and pawl are provided to prevent relative movement between the two members, and the pawl is controlled by the manually operable lever. Normally a patient will use a pair of crutches in accordance with the invention, and will initially operate the lever of each crutch to reduce the length of the crutch to the minimum by pressing the crutch on the floor. He can then raise himself by supporting his weight on the two crutches alternately and operating the control lever of the crutch which is not supporting his weight to allow that crutch to extend.
Inventors
- 👤 Ivan Anthony Fowler
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 06:51
CPC Classifications
A; A61; A61H; A61H3/00; A61H3/02
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
30 words
A crutch, the length of which is adjustable under the control of a manually-operable lever, said crutch having a hand grip, and the lever being adjacent to said hand grip.
Claim 2
Dependent Claim
30 words
A crutch, the length of which is adjustable under the control of a manually-operable lever, said crutch having a hand grip, and the lever being adjacent to said hand grip.
Claim 3
Dependent Claim
22 words
A crutch as claimed in Claim 1, including a main portion and an extensible end portion. telescopically arranged within said main portion.
Claim 4
Dependent Claim
24 words
A crutch as claimed in Claim 2, wherein spring means are provided to urge the end portion outwardly with respect to the main portion.
Claim 5
Dependent Claim
30 words
A crutch as claimed in Claim 2, or Claim 3, wherein the manually-operable lever controls locking means for preventing relative movement between the extensible end portion and the main portion.
Claim 6
Dependent Claim
49 words
A crutch as claimed in Claim 4, wherein said locking means include a rack parallel to said main portion and said end portion, one end of the rack being secured to said end portion, and the other end being secured to a ring member slidable on said main portion.
Claim 7
Dependent Claim
25 words
A crutch as claimed in Claim 5, wherein said manually-operable lever controls a pawl pivotally mounted on a clamp member secured to said main portion.
Claim 8
Dependent Claim
38 words
A crutch as claimed in Claim 6, wherein said manually-operable lever is operatively connected to said pawl by means of a rod pivotally connected at one end to said lever, and, at the other end, to said pawl.
Claim 9
Dependent Claim
19 words
A crutch as claimed in Claim 7, including a tension spring connected between said rod and said clamp member.
Claim 10
Dependent Claim
96 words
A crutch comprising:- a first tubular member; an elbow support fitted on said first tubular member at one end thereof; a hand grip fitted on said first tubular member intermediate the ends thereof; a second tubular member slidable within the first tubular member; a spring urging the second tubular member out of the first tubular member away from said first end thereof; a lever pivotally mounted on said first tubular member in the vicinity of said hand grip and locking means controlled by said lever for preventing relative movement between said first and second tubular members.
Claim 11
Dependent Claim
96 words
A crutch comprising:- a first tubular member; an elbow support fitted on said first tubular member at one end thereof; a hand grip fitted on said first tubular member intermediate the ends thereof; a second tubular member slidable within the first tubular member; a spring urging the second tubular member out of the first tubular member away from said first end thereof; a lever pivotally mounted on said first tubular member in the vicinity of said hand grip and locking means controlled by said lever for preventing relative movement between said first and second tubular members.
Claim 12
Dependent Claim
80 words
A crutch as claimed in Claim 9, wherein said locking means comprises: a ring member slidable on said first tubular member; a toothed rack, one end of which is secured to said second tubular member, the other end of said rack being secured to said ring member; a clamp member secured to said first tubular member; and a pawl pivotally mounted on said clamp member and controlled by said lever to engage and disengage in the teeth of said rack.
Claim 13
Dependent Claim
40 words
A crutch as claimed in Claim 10, wherein said locking means further includes:- a rod coupling said lever to said pawl, said rod being pivotally connected at one end to said lever, and at the other end to said pawl.
Claim 14
Dependent Claim
38 words
A crutch as claimed in Claim 11, wherein said lacking means further includes:- a tension spring connected between said rod and said clamp member, and operative to urge said pawl into engagement with the teeth of said rack.
Claim 15
Dependent Claim
62 words
A crutch comprising:- a main portion and an extensible end portion telescopically arranged within said main portion; a hand grip secured to said main portion; a manually operable lever pivotally mounted on said main portion odiacent to said hand grip; and locking means controlled by said manually operable fever for preventing relative movement between said extensible end portion and said main portion.
Claim 16
Dependent Claim
62 words
A crutch comprising:- a main portion and an extensible end portion telescopically arranged within said main portion; a hand grip secured to said main portion; a manually operable lever pivotally mounted on said main portion odiacent to said hand grip; and locking means controlled by said manually operable fever for preventing relative movement between said extensible end portion and said main portion.
Claim 17
Dependent Claim
58 words
An elbow crutch canprising:- a main portion and an extensible end portion telescopically arranged within said main portion; spring means operative to urge said end portion outwardly with respect to the main portion; . locking means for preventing relative movement between the extensible end portion and the main portion; and a manually operable lever controlling said locking means.
Claim 18
Dependent Claim
58 words
An elbow crutch canprising:- a main portion and an extensible end portion telescopically arranged within said main portion; spring means operative to urge said end portion outwardly with respect to the main portion; . locking means for preventing relative movement between the extensible end portion and the main portion; and a manually operable lever controlling said locking means.
Claim 19
Dependent Claim
49 words
An elbow crutch as claimed in Claim 14, wherein said locking means includes: a toothed rack parallel to said main portion and said end portion, one end of said rack being secured to said end portion, and the other end of said rack being movable along said main portion.
Claim 20
Dependent Claim
200 words
A crutch comprising:- a main tubular member; an elbow support fitted on said main tubular member; a boss secured to said main tubular member; a hand grip carried by said boss; a further tubular member slidable within said main tubular member; a spring operati ve to urge said further tubular member out of said main tubular member; a clamp secured to said further tubular member; a ring member slidable along said main tubular member; a toothed rack enclosed between two metal strips, one end of said rack, and of each of said strips, being secured to said clamp, and the other ends of said rack and said strips being secured to said. ring member; a further clamp secured to said main tubular member; a pawl pivotally mounted on said further clamp and provided with a projecting portion adapted to engage the teeth of said ring; an operating lever pivotally mounted on said main tubular member; a rod pivotally attached at one end to said pawl and at the other end to said operating lever; and a further spring urging said rod in the direction necessary to cause the projecting portion of the pawl to engage the teeth of the rack.
Claim 21
Dependent Claim
200 words
A crutch comprising:- a main tubular member; an elbow support fitted on said main tubular member; a boss secured to said main tubular member; a hand grip carried by said boss; a further tubular member slidable within said main tubular member; a spring operati ve to urge said further tubular member out of said main tubular member; a clamp secured to said further tubular member; a ring member slidable along said main tubular member; a toothed rack enclosed between two metal strips, one end of said rack, and of each of said strips, being secured to said clamp, and the other ends of said rack and said strips being secured to said. ring member; a further clamp secured to said main tubular member; a pawl pivotally mounted on said further clamp and provided with a projecting portion adapted to engage the teeth of said ring; an operating lever pivotally mounted on said main tubular member; a rod pivotally attached at one end to said pawl and at the other end to said operating lever; and a further spring urging said rod in the direction necessary to cause the projecting portion of the pawl to engage the teeth of the rack.
References Cited (Backward Citations)
No citation records indexed.
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