Patent US4012592A successfully refreshed from Google Patents.
Patent US3894598A successfully refreshed from Google Patents.
US3894598A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telescopic beam formed of two slidably mounted lengths and an organ for controlling the relative positions of these lengths relative to one another
Assignee: Poclain SA
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Filing: 1974-09-20
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Granted: 1975-07-15
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Expires: 1994-09-20
Abstract
Abstract The invention relates to a telescopic beam formed of two slidably mounted lengths and an organ for controlling the relative positions of these lengths relative to one another. A locking apparatus permits selective locking and unlocking of the lengths. One application is the construction of a tracked appliance with a variable gauge.
Inventors
- 👤 Victor P Yeou
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:51
CPC Classifications
B; B62; B62D; B62D55/00; B62D55/08; B62D55/084; B66; B66C; B66C23/00; B66C23/62; E; E02; E02F; E02F9/00; E02F9/02; E02F9/024; Y; Y10; Y10T; Y10T403/00; Y10T403/60; Y10T403/608
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
196 words
Telescopic beam comprising at least two lengths mounted to be relatively slidable, a drive organ which controls the relative positions of these lengths, means linking the drive organ between the said lengths and an apparatus for locking these two lengths in two of their relative positions, the locking apparatus comprising a lug which is mounted on one of the said lengths and two orifices which are formed in the other length, the lug being selectively engageable with and disengageable from these orifices, and the means linking the drive organ to the length provided with two orifices including an element which is movably mounted on this length and which bears two fingers of which one will enter the orifice engaged by the lug when the drive organ is to move the lengths relative to one another to bring the lug to the other orifice, the finger entering that orifice through the face of the length opposite to the face through which the lug entered that orifice, the controlling drive organ being operable to move the element relative to the length having two orifices when operated to vary the relative positions of the two lengths of the beam.
Claim 2
Dependent Claim
196 words
Telescopic beam comprising at least two lengths mounted to be relatively slidable, a drive organ which controls the relative positions of these lengths, means linking the drive organ between the said lengths and an apparatus for locking these two lengths in two of their relative positions, the locking apparatus comprising a lug which is mounted on one of the said lengths and two orifices which are formed in the other length, the lug being selectively engageable with and disengageable from these orifices, and the means linking the drive organ to the length provided with two orifices including an element which is movably mounted on this length and which bears two fingers of which one will enter the orifice engaged by the lug when the drive organ is to move the lengths relative to one another to bring the lug to the other orifice, the finger entering that orifice through the face of the length opposite to the face through which the lug entered that orifice, the controlling drive organ being operable to move the element relative to the length having two orifices when operated to vary the relative positions of the two lengths of the beam.
Claim 3
Dependent Claim
40 words
A beam in accordance with claim 1, in which the element is mounted pivotably on the length provided with the two orifices, while the fingers are fixed on this element at equal distances from the pivot axis of that element.
Claim 4
Dependent Claim
44 words
A beam in accordance with claim 1, in which each orifice is provided with a chamfered sector which merges on to the face through which the lug enters that orifice in operation, the chamfered sectors of the two orifices being oriented towards each other.
Claim 5
Dependent Claim
48 words
A beam in accordance with claim 1, in which an elastic organ is inserted between the length provided with the lug and the said lug and has the effect of biasing this lug towards the face through which the lug will enter the orifices of the other length.
Claim 6
Dependent Claim
61 words
A variable-gauge tracked vehicle comprising a central chassis and two track-bearing frames, each of the said frames being connected to the central chassis by means of a telescopic beam in accordance with claim 1, one of the lengths of the beam being fast with the central chassis and the other length of the said beam being fast with the corresponding frame.
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) | 1978-07-14 | 1979-01-13 | 1979-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-14 | 1983-01-13 | 1983-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-14 | 1987-01-13 | 1987-07-15 | $7700.00 | Window Closed / Lapsed |