US4807893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roller skate
Assignee: Individual
•
Filing: 1988-03-21
•
Granted: 1989-02-28
•
Expires: 2008-03-21
Abstract
Abstract A roller skate comprises a pair of adjacent rollers which are mounted on a shaft which in turn is mounted on two bracket plates extending downward from an intermediate portion of a pedal plate. A lever is pivotally mounted on the bracket plates above said rollers. The lever has an arched portion which extends over the rollers and has a distal end extending adjacent to the front side of the roller. The lever then extends rearward and holds a brake block substantially below the heel portion of the pedal plate. A spring is employed between the pedal plate and the lever to push the lever against a projection formed on one the bracket so as to prevent the lever from swinging. The skate is put in the braking position when the heel portion is depressed. The skate may further include front rollers substantially below the toe portion of the skate and a front brake block substantially at the front of the toe portion.
Inventors
- 👤 Chuan H. Huang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:59
CPC Classifications
A; A63; A63C; A63C17/00; A63C17/02
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
281 words
A roller skate comprising: an elongated pedal plate having a toe portion, a heel portion, two spaced apart downward bracket plates extending from an intermediate portion between said toe portion and said heel portion; two first rollers mounted on said bracket plates for rotation about a horizontal axis, said rollers being substantially close to one another with a clearance maintained therebetween for independent rotation, said rollers being situated to act as a fulcrum to permit said pedal plate to tilt forwardly and rearwardly about said horizontal axis; a lever member between said pedal plate and said rollers, mounted on said bracket plates for pivotal movement about an axis above said horizontal axis of said first rollers, said lever having an arched portion which extends over said rollers and has a distal end near a front side of said first rollers, said lever extending rearwardly and holding substantially below said heel portion a brake block which will rest on the ground when in a braking position, said distal end of said arched portion being able to abut with said first rollers when in said braking position; means formed on one of said bracket plates for engaging said arched portion in order to prevent said lever from swinging; a spring member placed between said pedal plate and said arched portion for urging said arched portion to engage with said engaging means; and two second rollers mounted on said pedal plate in front of said first rollers, said second rollers being substantially close to one another with a clearance maintained therebetween for independent rotation, said second rollers contacting the ground only when said toe portion is tilted forwardly with respect to said horizontal axis.
Claim 2
Dependent Claim
281 words
A roller skate comprising: an elongated pedal plate having a toe portion, a heel portion, two spaced apart downward bracket plates extending from an intermediate portion between said toe portion and said heel portion; two first rollers mounted on said bracket plates for rotation about a horizontal axis, said rollers being substantially close to one another with a clearance maintained therebetween for independent rotation, said rollers being situated to act as a fulcrum to permit said pedal plate to tilt forwardly and rearwardly about said horizontal axis; a lever member between said pedal plate and said rollers, mounted on said bracket plates for pivotal movement about an axis above said horizontal axis of said first rollers, said lever having an arched portion which extends over said rollers and has a distal end near a front side of said first rollers, said lever extending rearwardly and holding substantially below said heel portion a brake block which will rest on the ground when in a braking position, said distal end of said arched portion being able to abut with said first rollers when in said braking position; means formed on one of said bracket plates for engaging said arched portion in order to prevent said lever from swinging; a spring member placed between said pedal plate and said arched portion for urging said arched portion to engage with said engaging means; and two second rollers mounted on said pedal plate in front of said first rollers, said second rollers being substantially close to one another with a clearance maintained therebetween for independent rotation, said second rollers contacting the ground only when said toe portion is tilted forwardly with respect to said horizontal axis.
Claim 3
Dependent Claim
36 words
A roller skate as claimed in claim 1, wherein said spring member is a helical spring sleeved on said axis of said lever and having two end portions respectively engaging said pedal plate and said lever.
Claim 4
Dependent Claim
32 words
A roller skate as claimed in claim 1, wherein said brake block is a truncated cone-shaped block which has a screw rod extending upward, said screw rod adjustably attached to said lever.
Claim 5
Dependent Claim
28 words
A roller skate as claimed in claim 1, further comprising a front brake block attached to said pedal plate and extending downwardly in front of said front rollers.
Claim 6
Dependent Claim
27 words
A roller skate as claimed in claim 1, wherein said distal end of said arched portion has a brake plate attached thereto to contact said first rollers.
Claim 7
Dependent Claim
198 words
A roller skate comprising: an elongated pedal plate having a toe portion, a heel portion, and an intermediate portion between said toe portion and said heel portion; a first pair of rollers mounted for rotation about a first horizontal axis below said intermediate portion of the pedal plate, the rollers being situated for contact with the ground to act as a fulcrum to permit said pedal plate to tilt forwardly and rearwardly about the first horizontal axis; a second pair of rollers mounted for rotation about a second horizontal axis below said toe portion in front of said first axis, said second rollers contacting the ground only when said toe portion is tilted forwardly about said first horizontal axis; and a lever member mounted for pivotal movement relative to the pedal plate and having a front end near said first pair of rollers and a rear end including a brake block situated below said heel portion, the brake block contacting the ground only when said pedal plate is tilted rearwardly, the contact of the brake block with the ground causing the lever to pivot such that the front end of the lever contacts the first pair of rollers.
Claim 8
Dependent Claim
198 words
A roller skate comprising: an elongated pedal plate having a toe portion, a heel portion, and an intermediate portion between said toe portion and said heel portion; a first pair of rollers mounted for rotation about a first horizontal axis below said intermediate portion of the pedal plate, the rollers being situated for contact with the ground to act as a fulcrum to permit said pedal plate to tilt forwardly and rearwardly about the first horizontal axis; a second pair of rollers mounted for rotation about a second horizontal axis below said toe portion in front of said first axis, said second rollers contacting the ground only when said toe portion is tilted forwardly about said first horizontal axis; and a lever member mounted for pivotal movement relative to the pedal plate and having a front end near said first pair of rollers and a rear end including a brake block situated below said heel portion, the brake block contacting the ground only when said pedal plate is tilted rearwardly, the contact of the brake block with the ground causing the lever to pivot such that the front end of the lever contacts the first pair of rollers.
Claim 9
Dependent Claim
33 words
The roller skate of claim 6 further comprising two spaced apart bracket plates extending downwardly from said intermediate portion, the first pair of rollers being mounted for independent rotation to the bracket plates.
Claim 10
Dependent Claim
37 words
The roller skate of claim 6 wherein said lever comprises an arched portion which extends over said first pair of rollers, said lever front end being situated near a front side of said first pair of rollers.
Claim 11
Dependent Claim
30 words
The roller skate of claim 6 further comprising spring means in contact with the lever to bias the lever front end away from contact with the first pair of rollers.
Claim 12
Dependent Claim
260 words
A roller skate comprising: an elongated pedal plate having a toe portion, a heel portion, an intermediate portion between said toe portion and said heel portion, and two spaced apart bracket plates extending downwardly from said intermediate portion; a first pair of rollers mounted to the bracket plates for independent rotation about a first horizontal axis below said intermediate portion of the pedal plate, the rollers being situated for contact with the ground to act as a fulcrum to permit said pedal plate to tilt forwardly and rearwardly about the first horizontal axis; a second pair of rollers mounted for rotation about a second horizontal axis below said toe portion in front of said first axis, said second rollers contacting the ground only when said toe portion is tilted forwardly about said first horizontal axis to an inclined position; a lever member mounted for pivotal movement relative to the pedal plate having an arched portion which extends over said first pair of rollers, having a front end situated near a front side of said first pair of rollers, and a rear end including a brake block situated below said heel portion, the brake block contacting the ground only when said pedal plate is tilted rearwardly to an inclined position, the contact of the brake block with the ground causing the lever to pivot such that the front end of the lever contacts the first pair of rollers; and spring means in contact with the lever to bias the lever front end away from contact with the first pair of rollers.
Claim 13
Dependent Claim
260 words
A roller skate comprising: an elongated pedal plate having a toe portion, a heel portion, an intermediate portion between said toe portion and said heel portion, and two spaced apart bracket plates extending downwardly from said intermediate portion; a first pair of rollers mounted to the bracket plates for independent rotation about a first horizontal axis below said intermediate portion of the pedal plate, the rollers being situated for contact with the ground to act as a fulcrum to permit said pedal plate to tilt forwardly and rearwardly about the first horizontal axis; a second pair of rollers mounted for rotation about a second horizontal axis below said toe portion in front of said first axis, said second rollers contacting the ground only when said toe portion is tilted forwardly about said first horizontal axis to an inclined position; a lever member mounted for pivotal movement relative to the pedal plate having an arched portion which extends over said first pair of rollers, having a front end situated near a front side of said first pair of rollers, and a rear end including a brake block situated below said heel portion, the brake block contacting the ground only when said pedal plate is tilted rearwardly to an inclined position, the contact of the brake block with the ground causing the lever to pivot such that the front end of the lever contacts the first pair of rollers; and spring means in contact with the lever to bias the lever front end away from contact with the first pair of rollers.
References Cited (Backward Citations)
US225361A
Cited
US1402010A
Cited
CH132639A
Cited
US2173716A
Cited
US2179592A
Cited
GB894846A
Cited
US2901259A
Cited
NL129196C
Cited
US3749413A
Cited
US4602801A
Cited
US4570955A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-02-28 | 1992-08-29 | 1993-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-28 | 1996-08-29 | 1997-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-28 | 2000-08-29 | 2001-02-28 | $7700.00 | Window Closed / Lapsed |