US3746361A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Individual coil spring tandem suspension
Assignee: PAGE MANUFACTURING COMPANY Inc
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Filing: 1970-08-31
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Granted: 1973-07-17
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Expires: 1990-08-31
Abstract
Abstract This invention relates to a suspension for tandem axles of a truck or trailer. A pair of beams are journaled on a common trunnion. On one end of each beam a vertically flexible member depends downwardly into contact with the upper portion of the other beam intermediate one end of the other beam and the trunnion. Both flexible members are simultaneously flexed at both ends during increase of load on the suspension and traversal of irregularities on the road.
Inventors
- 👤 Gee D Mc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:50
CPC Classifications
B; B60; B60G; B60G5/00; B60G5/04; B60G5/06; B60G2206/00; B60G2206/01; B60G2206/10; B60G2206/16; B60G2206/162
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
197 words
In a suspension for motor vehicles, the improvements comprising: a bracket attached to the frame of the vehicle; a trunnion tube fixed to said bracket and extending horizontally outwardly therefrom; said trunnion tube having a central axle; a pair of beams journaled on said trunnion tube about said central axis; each of said beams having a portion extending forward of said central axis; a vertically flexible member vertically disposed between said forward portions of said beams forward of said trunnion tube; each of said beams having portions extending aft of said central axis; a second vertically flexible member vertically disposed between said aft portions of said beam aft of said trunnion tube; an axle attached to the forward portion of one of said beams; an axle attached to the aft portion of the other said beams; wherein the aft end of one of said beams is attached to the top portion of one of said vertically flexible members; and the bottom of said one of said vertically flexible members is attached to the aft end of the other of said beam members intermediate said trunnion tube and the axle attached to said other of said beam members.
Claim 2
Dependent Claim
197 words
In a suspension for motor vehicles, the improvements comprising: a bracket attached to the frame of the vehicle; a trunnion tube fixed to said bracket and extending horizontally outwardly therefrom; said trunnion tube having a central axle; a pair of beams journaled on said trunnion tube about said central axis; each of said beams having a portion extending forward of said central axis; a vertically flexible member vertically disposed between said forward portions of said beams forward of said trunnion tube; each of said beams having portions extending aft of said central axis; a second vertically flexible member vertically disposed between said aft portions of said beam aft of said trunnion tube; an axle attached to the forward portion of one of said beams; an axle attached to the aft portion of the other said beams; wherein the aft end of one of said beams is attached to the top portion of one of said vertically flexible members; and the bottom of said one of said vertically flexible members is attached to the aft end of the other of said beam members intermediate said trunnion tube and the axle attached to said other of said beam members.
Claim 3
Dependent Claim
66 words
The apparatus of claim 1 wherein the end of the forward portion of said other beam is attached to the top of the other of said flexible members; and the bottom of said other of said flexible members is attached to the forward portion of said one of said beam members intermediate the axle attached to said one of said beam members and the trunnion tube.
Claim 4
Dependent Claim
16 words
The apparatus of claim 1 wherein said vertically flexible members have substantially the same spring rate.
Claim 5
Dependent Claim
16 words
The apparatus of claim 1 wherein said vertically flexible members have substantially the same tensile strength.
Claim 6
Dependent Claim
16 words
The apparatus in claim 1 wherein said vertically flexible members have substantially the same compressive strength.
Claim 7
Dependent Claim
32 words
The apparatus in claim 1 wherein the length of the forward portion of one of said beams is equal to the length of the aft portion of the other of said beams.
Claim 8
Dependent Claim
48 words
The apparatus of claim 1 wherein the forward portion of one of said beams has substantially the same length between an axle attached thereto and the trunnion tube as the distance between the axle attached to the aft portion of the said other beams and the trunnion tube.
Claim 9
Dependent Claim
15 words
The apparatus of claim 1 wherein one of said flexible members is a coil spring.
Claim 10
Dependent Claim
14 words
The apparatus of claim 1 wherein both of said flexible members are coil springs.
Claim 11
Dependent Claim
15 words
The apparatus of claim 1 wherein one of said flexible members is an air bag.
Claim 12
Dependent Claim
14 words
The apparatus of claim 1 wherein both of said flexible members are air bags.
Claim 13
Dependent Claim
26 words
The apparatus of claim 1 wherein said beam members are journaled to said trunnion member by means of rubber bushings concentric with the said trunnion member.
Claim 14
Dependent Claim
26 words
The apparatus of claim 12 wherein said rubber bushings are separated by a ring-like metal shim concentric with and adjacently in contact with said trunnion tube.
Claim 15
Dependent Claim
37 words
The apparatus of claim 13 wherein said means journaling said beams to said trunnion tube are secured by means of a cap fixed to said trunnion tube and in abutting engagement with one of said rubber bushings.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |