US3646949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crutch with retractable ice gripper
Assignee: Individual
•
Filing: 1970-05-22
•
Granted: 1972-03-07
•
Expires: 1990-05-22
Abstract
Abstract A crutch having a retractable ice gripper operable by the user as he normally uses the crutch while being supported by the crutch. The ice gripper is fixed on the end on an adjustable longitudinal support which is biased downwardly with respect to the crutch with an adjustable biasing means. A latch controls the disposition of the ice gripper with respect to the bottom of the crutch.
Inventors
- 👤 Maurice W Streeter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:49
CPC Classifications
A; A61; A61H; A61H3/00; A61H3/02; A61H3/0288
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
149 words
In combination with an adjustable crutch having an arm rest, longitudinal support members including a lower support member having an end for contacting a supporting surface and an upper support member, means for securing said upper and lower support members together; a retractable ice-gripping means comprising: a longitudinal support means, an ice-gripping plate at one end of said longitudinal support means, said ice-gripping plate including at one end a plurality of pointed members for engaging and gripping icy surfaces; means slidably retaining said ice-gripping means on one of said longitudinal support members for longitudinal reciprocation with respect thereto between upper and lower positions, said pointed members extending below said lower support member end in said lower position, and said pointed members extending to a point above said lower support end when in said upper position; and means biasing said ice gripper means downwardly with respect to said support members.
Claim 2
Dependent Claim
149 words
In combination with an adjustable crutch having an arm rest, longitudinal support members including a lower support member having an end for contacting a supporting surface and an upper support member, means for securing said upper and lower support members together; a retractable ice-gripping means comprising: a longitudinal support means, an ice-gripping plate at one end of said longitudinal support means, said ice-gripping plate including at one end a plurality of pointed members for engaging and gripping icy surfaces; means slidably retaining said ice-gripping means on one of said longitudinal support members for longitudinal reciprocation with respect thereto between upper and lower positions, said pointed members extending below said lower support member end in said lower position, and said pointed members extending to a point above said lower support end when in said upper position; and means biasing said ice gripper means downwardly with respect to said support members.
Claim 3
Dependent Claim
23 words
The combination of claim 1 wherein said means for securing said upper and lower members engage said retaining means for said gripping means.
Claim 4
Dependent Claim
48 words
The combination of claim 1 wherein said longitudinal support means comprises first and second bars in overlapping relationship to each other, and means for adjustably securing said bars together so that the length of said longitudinal support means can be adjusted for different lengths of said adjustable crutch.
Claim 5
Dependent Claim
39 words
The combination of claim 3 wherein said securing means comprises a plurality of holes in one of said bars and at least one indentation in the other of said bars in registry with said holes in said one bar.
Claim 6
Dependent Claim
78 words
The combination of claim 3 wherein each of said bars is arcuate in longitudinal cross section, both of said bars being concave downwardly with respect to said support members, the upper of said bars having a plurality of apertures, and said securing means including a fastener member have a head between said support member and the lower bar, and a portion of said fastener member extending through said lower bar and into an aperture in said upper bar.
Claim 7
Dependent Claim
18 words
The combination of claim 1 further comprising latch means for retaining said gripping means in said upper position.
Claim 8
Dependent Claim
31 words
The combination of claim 6 wherein said latch further includes means for limiting the downward movement of said ice gripping means with respect to said support members at said lower position.
Claim 9
Dependent Claim
16 words
The combination of claim 1 further comprising means to adjust the bias on said biasing means.
Claim 10
Dependent Claim
25 words
The combination of claim 7 wherein said adjustable crutch includes a handle and said latch means includes a U-shaped bar having legs engaging said handle.
Claim 11
Dependent Claim
117 words
In combination with a crutch, a retractable ice gripper comprising: a longitudinal support means; means slidably retaining said support means on said crutch for reciprocatory movement along the length of said crutch; ice-gripping edges at a bottom end of said support means adapted to move above and below the bottom end of said crutch; means to bias said support means downwardly with respect to said crutch; and latch means to retain said support means in a position wherein said ice-gripping edges are above the bottom end of said crutch, and to stop the downward movement of said support means at a position where said ice-gripping edges are a spaced distance below the bottom end of said crutch.
Claim 12
Dependent Claim
117 words
In combination with a crutch, a retractable ice gripper comprising: a longitudinal support means; means slidably retaining said support means on said crutch for reciprocatory movement along the length of said crutch; ice-gripping edges at a bottom end of said support means adapted to move above and below the bottom end of said crutch; means to bias said support means downwardly with respect to said crutch; and latch means to retain said support means in a position wherein said ice-gripping edges are above the bottom end of said crutch, and to stop the downward movement of said support means at a position where said ice-gripping edges are a spaced distance below the bottom end of said crutch.
Claim 13
Dependent Claim
25 words
The combination of claim 10 further comprising means to adjust said biasing means so that said ice gripper is adjustable for persons of different weight.
Claim 14
Dependent Claim
84 words
In combination with a crutch, a retractable ice gripper comprising: a longitudinal support means; means slidably retaining said support means on said crutch for reciprocatory movement along the length of said crutch; ice-gripping edges at a bottom of said support means adapted to move above and below the bottom end of said crutch; means to bias said support means downwardly with respect to said crutch; and means to adjust said biasing means so that said ice gripper is adjustable for persons of different weight.
Claim 15
Dependent Claim
84 words
In combination with a crutch, a retractable ice gripper comprising: a longitudinal support means; means slidably retaining said support means on said crutch for reciprocatory movement along the length of said crutch; ice-gripping edges at a bottom of said support means adapted to move above and below the bottom end of said crutch; means to bias said support means downwardly with respect to said crutch; and means to adjust said biasing means so that said ice gripper is adjustable for persons of different weight.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-07 | 1975-09-06 | 1976-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-07 | 1979-09-06 | 1980-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-07 | 1983-09-06 | 1984-03-07 | $7700.00 | Window Closed / Lapsed |