Patent US4763939A successfully refreshed from Google Patents.
US4763939A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protective roller device for car
Assignee: Individual
•
Filing: 1986-12-31
•
Granted: 1988-08-16
•
Expires: 2006-12-31
Abstract
Abstract The present invention relates to a protective roller device for attachment to various kinds of vehicles for prevention of injuries to persons or damages to objects encountered in traffic accidents when persons may stumble or objects may fall under the area of the wheel of the vehicle. The device comprises a set of vertical and parallel arranged protective rollers to be fixed on the car body at a location proximate to the car wheels. The said protective rollers consists of a center shaft and an elastomeric buffer component sheathed around the said shaft for free rotate thereabout. When equipped with said protective roller devices, the car is able to gently push the persons or objects encountered out of the dangerous wheel area and to prevent injuries or damages.
Inventors
- 👤 Xiaoyang Zhu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:03
CPC Classifications
B; B60; B60R; B60R19/00; B60R19/02; B60R19/04; B60R19/16; B60R19/56; B60R19/565
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
67 words
A protective roller assembly for attachment to the sides of a car, slightly in front of the wheels comprising, a center shaft, an elastomeric sleeve which is sheathed externally around the said center shaft and is rotatable freely thereabout, said center shaft having one end mounted for vertical movement to said car, and roller means mounted for rotation on the other end of the same center shaft.
Claim 2
Dependent Claim
67 words
A protective roller assembly for attachment to the sides of a car, slightly in front of the wheels comprising, a center shaft, an elastomeric sleeve which is sheathed externally around the said center shaft and is rotatable freely thereabout, said center shaft having one end mounted for vertical movement to said car, and roller means mounted for rotation on the other end of the same center shaft.
Claim 3
Dependent Claim
32 words
The protective roller assembly of claim 1 mounted to both sides of the car, slightly in front of the rear wheels at an angle to deflect any objects away from the wheels.
Claim 4
Dependent Claim
19 words
The protective roller assembly of claim 2 wherein said protective roller assembly is mounted at an angle of 20°-35°.
Claim 5
Dependent Claim
107 words
The protective roller assembly of claim 1 comprising a central shaft; a platen fixed to the free end of said shaft; a bearing fixed between said platen and a shoulder formed on the lower free end of the center shaft, a flange fixedly positioned intermediate of the ends of said shaft, a journal bearing formed on said flange, said center shaft passing slidingly through said journal bearing, a spring fitted between said journal bearing and said central shaft, and a foam rubber sleeve 6 fitted elastically and tightly about the spring, a spherical component rotatably mounting said spherical component to the free end of said center shaft.
Claim 6
Dependent Claim
30 words
The protective roller device as claimed in claim 4 further characterized in that the said elastomeric sleeve is in the form of similarly shaped, multi-sections stacked one upon the other.
Claim 7
Dependent Claim
78 words
The protective roller device as claimed in claim 5 further characterized in that the said set of basically vertical and parallel mounted protective rollers shares a common frame component for mounting to the car body, the said frame component through a bushing component which is fixed on the frame component so that the said protective roller is reciprocally mounted within the bushing component when the car is running and when the said spherical component 10 touching the ground.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-08-16 | 1992-02-15 | 1992-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-16 | 1996-02-15 | 1996-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-16 | 2000-02-15 | 2000-08-16 | $7700.00 | Window Closed / Lapsed |