Patent US2430249A successfully refreshed from Google Patents.
Patent US3948535A successfully refreshed from Google Patents.
US3948535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ski-equipped crutch
Assignee: Nippon Gakki Co Ltd
•
Filing: 1975-05-08
•
Granted: 1976-04-06
•
Expires: 1995-05-08
Abstract
Abstract A ski-equipped crutch comprising a pole member, a pole-ski member detachably secured to the bottom of said pole member, and a holding member secured to the pole member and said pole-ski member to hold these two members so as to allow rotation of these two members relative to each other. Said holding member has an upright guide plate provided with an arcuate edge having spaced notches for selective engagement with a movable ball housed in said pole member and urged toward said arcuate edge by a spring. Said pole member further has a length-adjusting means comprising at least two separate portions one of which is received in the other and also comprising means for fastening these two portions tightly together at a desired position of these two portions selected from given positions. By loosening this fastening means, the pole member can be separated into parts for the convenience of transportation of the crutch. Moreover, the forward end of the pole-ski member has a cutout so that, when the pole-ski member is rotated toward the pole member, these two members are rendered into a rectilinear assembly without interference therebetween, thereby providing a walk-assisting cane structure.
Inventors
- 👤 Takafusa Negi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:36
CPC Classifications
A; A63; A63C; A63C11/00; A63C11/22; A63C11/221; A63C2201/00; A63C2201/10; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32254; Y10T403/32262; Y10T403/32319; Y10T403/32327; Y10T403/32336
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
225 words
A ski-equipped crutch comprising: a pole member, a pole-ski member, a holding member fixedly attached to said pole-ski member and rotatably attached to said pole member, said holding member including a guide plate having a smooth guiding free end surface provided with spaced notches, an elastic engaging means for releasably locking said pole member and said holding member into engagement with each other at at least first and second selected positions, in said first position said ski pole member being substantially perpendicular to the longitudinal direction of said pole member and in said second position said ski pole member being substantially aligned with said pole member, said engaging means including a tubular bifurcated lower end portion formed in said pole member, said holding member being received in said bifurcated lower end portion, a ball movably received between said tubular lower end portion of the pole member and said guiding surface of said holding member, and a biasing means received within said tubular lower end portion and acting along the longitudinal direction of said pole member for urging said ball into engagement with said guide surface, said ball moving in and out of said notches and smoothly along said guide surface when a force urging rotation of said pole member with respect to said pole-ski member exceeds the biasing force urging said ball into said notches.
Claim 2
Dependent Claim
225 words
A ski-equipped crutch comprising: a pole member, a pole-ski member, a holding member fixedly attached to said pole-ski member and rotatably attached to said pole member, said holding member including a guide plate having a smooth guiding free end surface provided with spaced notches, an elastic engaging means for releasably locking said pole member and said holding member into engagement with each other at at least first and second selected positions, in said first position said ski pole member being substantially perpendicular to the longitudinal direction of said pole member and in said second position said ski pole member being substantially aligned with said pole member, said engaging means including a tubular bifurcated lower end portion formed in said pole member, said holding member being received in said bifurcated lower end portion, a ball movably received between said tubular lower end portion of the pole member and said guiding surface of said holding member, and a biasing means received within said tubular lower end portion and acting along the longitudinal direction of said pole member for urging said ball into engagement with said guide surface, said ball moving in and out of said notches and smoothly along said guide surface when a force urging rotation of said pole member with respect to said pole-ski member exceeds the biasing force urging said ball into said notches.
Claim 3
Dependent Claim
82 words
A ski-equipped crutch according to claim 1, in which said pole-ski member has at its forward end a bent forward portion with a cutout having a breadth somewhat greater than the outer diameter of the pole member and with a length that, as the pole member and the pole-ski member are rotated toward each other into an aligned superposed straight position, the pole member is kept from being hit by the edge of the bent forward end portion of the pole-ski member.
Claim 4
Dependent Claim
46 words
A ski-equipped crutch according to claim 1 wherein said pole-ski member further comprises a rear protector secured to the rear of said pole-ski member, said rear protector having a serrated edge spaced with respect to a plane defined by the bottom surface of said pole-ski member.
Claim 5
Dependent Claim
121 words
The ski-equippeed crutch of claim 3 wherein said pole member further includes means for altering the length thereof, said altering means including at least two sub-members of the pole member, one of said sub-members being a tubular pole body having spaced holes formed on one side of its circumference, a tubular lower end member slidably received in said tubular pole body and having a solid head portion formed integrally at its top for being received in said tubular pole body and being provided with at least one threaded hole, and a screw member extending through one of said spaced holes and said threaded hole when the tubular lower end member having said head portion is received in said tubular pole body.
References Cited (Backward Citations)
US1035760A
Cited
US1621255A
Cited
US2191348A
Cited
US2818290A
Cited
US3273575A
Cited
US3289685A
Cited
US3456663A
Cited
DE1967123A1
Cited
US3738674A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-04-06 | 1979-10-06 | 1980-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-06 | 1983-10-06 | 1984-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-06 | 1987-10-06 | 1988-04-06 | $7700.00 | Window Closed / Lapsed |