Patent US3889977A successfully refreshed from Google Patents.
US3889977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trailers
Assignee: SUEHIRO SHARYO SEISAKUSHO KK
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Filing: 1973-12-07
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Granted: 1975-06-17
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Expires: 1993-12-07
Abstract
Abstract A trailer which is adapted to be connected to another trailer by means of couplers and has a control apparatus serving to constantly urge the couplers to be positioned straight forwardly or in the moving direction of the trailer, whereby a train of trailers may be moved by a tractor forwards or backwards in a straight aligned array.
Inventors
- 👤 Yoshiharu Nakawaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:08
CPC Classifications
B; B62; B62D; B62D13/00; B62D13/06; B62D53/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
89 words
A trailer comprising, a frame, couplers connected rotatably in a horizontal plane to said frame, swingable members connected rotatably in a horizontal plane to said couplers respectively, axles supported by said swingable members, guide means fixed to said axles respectively and having arcuate guide surfaces, control means provided with said swingable members and each having a guide roller engaging resiliently with said arcuate guide surface to control the rotation of said couplers, and adjusting screws provided with said control means to adjust a force applied to said guide rollers.
Claim 2
Dependent Claim
89 words
A trailer comprising, a frame, couplers connected rotatably in a horizontal plane to said frame, swingable members connected rotatably in a horizontal plane to said couplers respectively, axles supported by said swingable members, guide means fixed to said axles respectively and having arcuate guide surfaces, control means provided with said swingable members and each having a guide roller engaging resiliently with said arcuate guide surface to control the rotation of said couplers, and adjusting screws provided with said control means to adjust a force applied to said guide rollers.
Claim 3
Dependent Claim
134 words
A trailer comprising, a frame, a pair of couplers connected rotatably in a horizontal plane to said frame at the front and rear end portions of said frame, swingable members each connected rotatably in a horizontal plane to each of said couplers, axles supported by said swingable members, guide means fixed to said axles, respectively and having arcuate guide surfaces, control means provided with said swingable members and each having a guide roller engaging resiliently with said arcuate guide surface to control the rotation of said couplers, adjusting screws provided with said control means to adjust a force applied to said guide rollers actuator plates fixed to the inner ends of the swingable members, and a pair of rod assemblies connected rotatably at both ends thereof to said actuator plates in an interconnecting array.
Claim 4
Dependent Claim
134 words
A trailer comprising, a frame, a pair of couplers connected rotatably in a horizontal plane to said frame at the front and rear end portions of said frame, swingable members each connected rotatably in a horizontal plane to each of said couplers, axles supported by said swingable members, guide means fixed to said axles, respectively and having arcuate guide surfaces, control means provided with said swingable members and each having a guide roller engaging resiliently with said arcuate guide surface to control the rotation of said couplers, adjusting screws provided with said control means to adjust a force applied to said guide rollers actuator plates fixed to the inner ends of the swingable members, and a pair of rod assemblies connected rotatably at both ends thereof to said actuator plates in an interconnecting array.
Claim 5
Dependent Claim
183 words
A trailer comprising, a frame, front and rear couplers connected rotatably in a horizontal plane to said frame at the front and rear end portions of said frame, said couplers each having a forward portion rotatable in a vertical plane, swingable members each connected at its forward end roatably in a horizontal plane to each middle portion of said couplers, bearing cavities each formed by upper and lower plates at the backward portion of each swingable member, axles each supported rotatably by a shaft in each bearing cavity, guide members each fixed to each axle and having an arcuate guide surface, control means each having a guide roller engaging resiliently with said arcuate guide surface of said guide member at an attended part of said lower plate of said swingable member for controlling the rotation of said coupler by urging resiliently and normally said guide roller to said arcuate guide surface, actuator plates each fixed to said upper plates of each swingable member, and a pair of rod assemblies connected rotatably at both ends thereof to said actuator plates in an interconnecting array.
Claim 6
Dependent Claim
183 words
A trailer comprising, a frame, front and rear couplers connected rotatably in a horizontal plane to said frame at the front and rear end portions of said frame, said couplers each having a forward portion rotatable in a vertical plane, swingable members each connected at its forward end roatably in a horizontal plane to each middle portion of said couplers, bearing cavities each formed by upper and lower plates at the backward portion of each swingable member, axles each supported rotatably by a shaft in each bearing cavity, guide members each fixed to each axle and having an arcuate guide surface, control means each having a guide roller engaging resiliently with said arcuate guide surface of said guide member at an attended part of said lower plate of said swingable member for controlling the rotation of said coupler by urging resiliently and normally said guide roller to said arcuate guide surface, actuator plates each fixed to said upper plates of each swingable member, and a pair of rod assemblies connected rotatably at both ends thereof to said actuator plates in an interconnecting array.
Claim 7
Dependent Claim
26 words
A trailer as set forth in claim 3, further comprising an adjusting screw for adjusting a force applied to said guide roller of said control means.
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) | 1978-06-16 | 1978-12-16 | 1979-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-16 | 1982-12-16 | 1983-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-16 | 1986-12-16 | 1987-06-17 | $7700.00 | Window Closed / Lapsed |