Patent US3712424A successfully refreshed from Google Patents.
US3712424A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Parking brake
Assignee: Individual
•
Filing: 1971-01-15
•
Granted: 1973-01-23
•
Expires: 1991-01-15
Abstract
Abstract A parking brake adapted to be placed between tandem wheels of a vehicle such as a camping trailer or a mobile home trailer. The brake comprises a pair of bridging structures extending between the tires of the tandem wheels and a screw shaft connecting the bridging structures to draw the structures toward each other so as to bear against the tires to prevent rotation.
Inventors
- 👤 A Swan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:50
CPC Classifications
B; B60; B60T; B60T1/00; B60T1/005
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
148 words
A parking brake, for vehicles having tandemly disposed wheels, comprising: a. a pair of bridging structures, each including a pair of domeshaped bridging members having planar edges disposed in contiguous relation and spacing the central portions, the members having aligned centrally disposed openings; b. a screwthreaded shaft extending between the bridging structure and through the aligned openings therein, the margins of the aligned openings bearing against the shaft to resist tilting of the bridging structures relative to the shaft; c. the bridging structures being dimensioned to bridge between the tires of a pair of tandemly disposed wheels in planes above and below a plane common to the axes of the wheels with their planar edges engaging the tires; d. and screwthreaded means on the shaft for forcing the bridging structures toward each other thereby to cause the planar edges of the bridging members to indent into the tires.
Claim 2
Dependent Claim
148 words
A parking brake, for vehicles having tandemly disposed wheels, comprising: a. a pair of bridging structures, each including a pair of domeshaped bridging members having planar edges disposed in contiguous relation and spacing the central portions, the members having aligned centrally disposed openings; b. a screwthreaded shaft extending between the bridging structure and through the aligned openings therein, the margins of the aligned openings bearing against the shaft to resist tilting of the bridging structures relative to the shaft; c. the bridging structures being dimensioned to bridge between the tires of a pair of tandemly disposed wheels in planes above and below a plane common to the axes of the wheels with their planar edges engaging the tires; d. and screwthreaded means on the shaft for forcing the bridging structures toward each other thereby to cause the planar edges of the bridging members to indent into the tires.
Claim 3
Dependent Claim
42 words
A parking brake, as defined in claim 1, wherein: a. the pairs of bridging structures are similarly domed and separable from each other for stacking engagement; b. and separable fastening means join the pairs of bridging members for mounting on the shaft.
Claim 4
Dependent Claim
101 words
A parking brake for vehicles having tandemly disposed wheels, comprising: a. a pair of bridging members adapted to be disposed in planes above and below a plane common to the axes of the wheels, each bridging member having spaced coplanar tire indenting edges, and centrally disposed shaft guide means perpendicular thereto; b. a shaft slidably received in the guide means and extending therebetween; c. and means carried by the shaft and engageable with the remote sides of the guide means for drawing the bridging members toward each other thereby causing the edges thereof to indent into the surfaces of the tires.
Claim 5
Dependent Claim
101 words
A parking brake for vehicles having tandemly disposed wheels, comprising: a. a pair of bridging members adapted to be disposed in planes above and below a plane common to the axes of the wheels, each bridging member having spaced coplanar tire indenting edges, and centrally disposed shaft guide means perpendicular thereto; b. a shaft slidably received in the guide means and extending therebetween; c. and means carried by the shaft and engageable with the remote sides of the guide means for drawing the bridging members toward each other thereby causing the edges thereof to indent into the surfaces of the tires.
Claim 6
Dependent Claim
37 words
A parking brake as defined in claim 3, wherein: a. the shaft guide means restrains the bridging members against angular movement relative to the shaft, thereby to maintain the shaft in perpendicular relation to the bridging members.
Claim 7
Dependent Claim
36 words
A parking brake as defined in claim 3, wherein: a. the bridging members are rectangular in plan, each forming a first pair of edges having greater spacing and a second pair of edges having lesser spacing.
References Cited (Backward Citations)
US3548975A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |