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US4400994A Expired / Lapsed US ⏱️ 0.0 years remaining

Hinge assembly

Assignee: Kverneland AS
•
Filing: 1981-12-30
•
Granted: 1983-08-30
•
Expires: 2001-12-30
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Abstract

Abstract A first segment usually attached to a tractor is pivotally linked by a first bolt to a second pivotal segment. For example, which may be moved between an extended outward working position and a retracted, non-working inward position. A hydraulic cylinder and piston are mounted on the fixed segment and the free end of the piston is pivotally linked to the base of a substantially U-shaped member. One arm of the U-shaped member is pivotally linked to the fixed segment, and the other arm of the U-shaped member is pivotally linked to one end of a coupling member. The other end of the coupling member is pivotally linked to the pivotal segment. In the extended position, the arms of the U-shaped member pivot down wardly, and the end of the coupling member connected to the pivotal segment comes to rest between the arms of the U-shaped member in horizontal alignment with the links connecting the U-shaped member to the fixed segment and pivotal segment. Arms of the U-shaped member come to rest in a position substantially surrounding the bolt connecting the fixed segment to the pivotal segment, and the two segments are thereby locked in the extended position.

Inventors

  • 👤 Magne Skjaeveland

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-31 10:08
CPC Classifications
A; A01; A01B; A01B73/00; A01B73/02; A01B73/04; E; E05; E05F; E05F15/00; E05F15/50; E05F15/53; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20576; Y10T74/20582; Y10T74/20588; Y10T74/20636

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 184 words
A hinge assembly for use with extendable implements and the comprising: (a) a fixed segment, (b) a pivotal segment, (c) first link means pivotally connecting said fixed segment to said pivotal segment, (d) extending means mounted on said fixed segment, (e) a substantially U-shaped member having two legs and a bight portion, (f) second linking means pivotally connecting said bight portion to said extending means, (g) third linking means pivotally connecting one leg of said substantially U-shaped member to said fixed segment, (h) a coupling member having first and second ends, (i) fourth linking means pivotally connecting the other leg of said substantially U-shaped member to said first end of said coupling member, (j) Fifth linking means connecting said second end of said coupling member to said pivotalsegment; whereby when said pivotal segment is extended in line with said fixed segment, said second end of said coupling means is aligned intermediate to the legs of said substantially U-shaped member, and said first linking means is aligned substantially intermediate said bight portion of said substantially U-shaped member and said second end of said coupling means.
Claim 2
Dependent Claim 184 words
A hinge assembly for use with extendable implements and the comprising: (a) a fixed segment, (b) a pivotal segment, (c) first link means pivotally connecting said fixed segment to said pivotal segment, (d) extending means mounted on said fixed segment, (e) a substantially U-shaped member having two legs and a bight portion, (f) second linking means pivotally connecting said bight portion to said extending means, (g) third linking means pivotally connecting one leg of said substantially U-shaped member to said fixed segment, (h) a coupling member having first and second ends, (i) fourth linking means pivotally connecting the other leg of said substantially U-shaped member to said first end of said coupling member, (j) Fifth linking means connecting said second end of said coupling member to said pivotalsegment; whereby when said pivotal segment is extended in line with said fixed segment, said second end of said coupling means is aligned intermediate to the legs of said substantially U-shaped member, and said first linking means is aligned substantially intermediate said bight portion of said substantially U-shaped member and said second end of said coupling means.
Claim 3
Dependent Claim 43 words
The apparatus of in claim 1, wherein said extending means is a hydraulic cylinder and piston, said piston being pivotally connected by said second link means to said bight portion of said substantially U-shaped member and said cylinder mounted on said fixed segment.
Claim 4
Dependent Claim 16 words
The apparatus of claim 1 or 2 wherein each of said link means is a bolt.

References Cited (Backward Citations)

US2269308A Cited
US4127203A Cited
US4303012A Cited
US4297908A Cited
US4265587A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1986-08-29 1987-02-28 1987-08-30 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1990-08-29 1991-02-28 1991-08-30 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1994-08-29 1995-02-28 1995-08-30 $7700.00 Window Closed / Lapsed

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