Patent US3604721A successfully refreshed from Google Patents.
US3604721A
Expired / Lapsed
US
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Two-position frame coupler
Assignee: Fruehauf Corp
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Filing: 1969-06-11
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Granted: 1971-09-14
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Expires: 1989-06-11
Abstract
Abstract The coupler joins two chassis frames to form an elongated unit which can be transported by a tractor. The rear end of the frame has a pin in each corner which may be adjusted to extend different amounts therefrom. The front end of the frame has two apertures to receive the pins which are locked therein to couple the one end of one frame to the other end of a second frame.
Inventors
- 👤 Adrian F Hulverson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:03
CPC Classifications
B; B62; B62D; B62D21/00; B62D21/14; B60; B60D; B60D1/00; B60D1/01; B60D1/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
158 words
In a pair of connEctable frames each frame having side members joined by a front and a rear crossmember, a pin adjustably supported by the front crossmember to project forwardly thereof and having diametrically disposed notches on the projecting end and at least two pairs of said notches on the opposite end, a boss on said crossmember through which said pin extends and having spaced parallel apertures, a yoke having fingers movable in the apertures of said boss into a selected pair of said oppositely disposed notches at the rear of the pin, the rear crossmember of a second frame containing a sleeve aligned with the projecting pin of the front crossmember having a bell-shape outer end for receiving the projecting end of the pin, and a second yoke having fingers projecting through transverse apertures in said sleeve for intercepting the pair of oppositely disposed notches on the projecting end on the pin for locking the frames together.
Claim 2
Dependent Claim
158 words
In a pair of connEctable frames each frame having side members joined by a front and a rear crossmember, a pin adjustably supported by the front crossmember to project forwardly thereof and having diametrically disposed notches on the projecting end and at least two pairs of said notches on the opposite end, a boss on said crossmember through which said pin extends and having spaced parallel apertures, a yoke having fingers movable in the apertures of said boss into a selected pair of said oppositely disposed notches at the rear of the pin, the rear crossmember of a second frame containing a sleeve aligned with the projecting pin of the front crossmember having a bell-shape outer end for receiving the projecting end of the pin, and a second yoke having fingers projecting through transverse apertures in said sleeve for intercepting the pair of oppositely disposed notches on the projecting end on the pin for locking the frames together.
Claim 3
Dependent Claim
52 words
In a pair of connectable frames as recited in claim 1, wherein a pin is carried on each end of the front crossmember and wherein a sleeve is carried on each end of the rear crossmember aligned with the pins on the front crossmembers for connecting the frames together at the corners.
Claim 4
Dependent Claim
47 words
In a pair of connectable frames as recited in claim 2, wherein the oppositely disposed notches on the projecting ends of the pins are of a width greater than the diameter of the yoke fingers to permit the more readily insertion of the fingers within the notches.
Claim 5
Dependent Claim
44 words
In a pair of connectable frames as recited in claim 3, wherein the extending portion of the pins have a forward tapered end which produce the alignment of the frames when being inserted in the bell ends of sleeves carried by the rear crossmember.
Claim 6
Dependent Claim
33 words
In a pair of connectable frames as recited in claim 4, wherein the yoke securing the pin to the front crossmember has locking means therefor which prevents the separation of the yoke therefrom.
Claim 7
Dependent Claim
54 words
In a pair of connectable frames as recited in claim 5, wherein the yoke on the rear crossmember has one end of a pivoted lever secured thereto by which the fingers of the yoke are moved into the oppositely disposed notches on the projecting end of the pin after being inserted within the sleeve.
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) | 1974-09-13 | 1975-03-15 | 1975-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-13 | 1979-03-15 | 1979-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-13 | 1983-03-15 | 1983-09-14 | $7700.00 | Window Closed / Lapsed |