US3867845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for converting a rotary movement into a symmetrical reciprocating movement
Assignee: US Philips Corp
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Filing: 1974-06-12
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Granted: 1975-02-25
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Expires: 1994-06-12
Abstract
Abstract A device for converting a rotary movement into a symmetrical reciprocating movement, comprising a first isosceles triangle, a first base vertex of which is connected to a rotatable crank and whose top vertex is pivotably connected to a fixed point by way of a bar having a length which is equal to that of the legs of the triangle, with the result that the second base vertex performs a symmetrical reciprocating movement with acute reversing points. The second base vertex is connected to a base vertex of a second triangle whose top vertex is pivotably connected, by way of a bar having the same length as the legs of said triangle, to a fixed point which is situated on said symmetry line of the movement of the first triangle. The movement of the second base vertex of the second triangle is transferred to a location outside the mechanism by way of a parallelogram system or other appropriate means.
Inventors
- 👤 Hendrikus Jan Antuma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:16
CPC Classifications
F; F16; F16H; F16H21/00; F16H21/10; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
154 words
A device for converting a rotary movement into a symmetrical reciprocating movement, utilizing a bar system comprising a first isosceles coupling triangle, a first base vertex of which is connected to a rotatable crank, its top vertex being pivotably connected to a fixed point by a bar of a length which is equal to that of the legs of the triangle, with the result that the second base vertex performs a symmetrical reciprocating movement with acute reversing points, the symmetry line thereof passing through said fixed point, wherein the said second base vertex is connected to a base vertex of an isosceles second coupling triangle, the top vertex of which is pivotably connected to a fixed point by a bar having the same length as the legs of the triangle, said fixed point being situated at least substantially on said symmetry line of the movement of the second base vertex of the first triangle.
Claim 2
Independent Claim
154 words
A device for converting a rotary movement into a symmetrical reciprocating movement, utilizing a bar system comprising a first isosceles coupling triangle, a first base vertex of which is connected to a rotatable crank, its top vertex being pivotably connected to a fixed point by a bar of a length which is equal to that of the legs of the triangle, with the result that the second base vertex performs a symmetrical reciprocating movement with acute reversing points, the symmetry line thereof passing through said fixed point, wherein the said second base vertex is connected to a base vertex of an isosceles second coupling triangle, the top vertex of which is pivotably connected to a fixed point by a bar having the same length as the legs of the triangle, said fixed point being situated at least substantially on said symmetry line of the movement of the second base vertex of the first triangle.
Claim 3
Dependent Claim
134 words
A device as claimed in claim 1, wherein one side of the second coupling triangle between the second base vertex and the top vertex and also the connection bar between the top vertex and the fixed point each forms part of a bar parallelogram, consisting of bars which are pivotably connected, both parallelograms having one side in common which is formed by a bar which is connected to the top vertex, the end of this bar which is remote from the top vertex being connected to a bar which extends parallel to the connection bar between the top vertex and the fixed point and which is also connected to a fixed point, the bar which extends parallel to said bar and which is connected to the second base vertex being extended outside the device.
Claim 4
Independent Claim
358 words
A device for converting a rotary movement into a symmetrical reciprocating movement, comprising; an input member mounted for rotation about a fixed input axis, comprising a first connection means for rotatable connection to said input member about a first axis, said first axis being parallel to and spaced a first distance from said input axis; a first isosceles coupling triangle comprising a first coupling rotatably connected to said first connection means for pivotable movement about said first axis, and second and third couplings for pivotal connection defining second and third axes, said second and third axes being parallel to said first axis, said second axis being equally spaced a second distance from said first and third axes, the first, second and third axes forming a first isosceles triangle; a first coupling member having a pivotal connection to said second coupling about said second axis and a pivotal connection to a first fixed point about an axis parallel to said second axis and spaced therefrom a distance equal to said second distance; a second isosceles coupling triangle comprising a fourth coupling pivotably connected to said third coupling about said third axis, a fifth coupling for pivotal connection defining a fourth axis parallel to said third axis and spaced therefrom a third distance, an output connection point spaced aPart from said fourth axis a distance equal to said third distance, the third and fourth axes and output connection point forming a second isosceles triangle; and a second coupling member having a pivotal connection to said fifth coupling about said fourth axis and a pivotal connection to a second fixed point about an axis parallel to said fourth axis and spaced therefrom a distance equal to said third distance; said second distance and a distance between the input axis and the first fixed point being such that the axis of said third coupling has a reciprocating motion along a path having acute reversing points upon rotation of said input member about said input axis, said reciprocating motion being symmetrical about the line passing through said first fixed point, and said second fixed point being situated approximately along said line of symmetry.
Claim 5
Independent Claim
358 words
A device for converting a rotary movement into a symmetrical reciprocating movement, comprising; an input member mounted for rotation about a fixed input axis, comprising a first connection means for rotatable connection to said input member about a first axis, said first axis being parallel to and spaced a first distance from said input axis; a first isosceles coupling triangle comprising a first coupling rotatably connected to said first connection means for pivotable movement about said first axis, and second and third couplings for pivotal connection defining second and third axes, said second and third axes being parallel to said first axis, said second axis being equally spaced a second distance from said first and third axes, the first, second and third axes forming a first isosceles triangle; a first coupling member having a pivotal connection to said second coupling about said second axis and a pivotal connection to a first fixed point about an axis parallel to said second axis and spaced therefrom a distance equal to said second distance; a second isosceles coupling triangle comprising a fourth coupling pivotably connected to said third coupling about said third axis, a fifth coupling for pivotal connection defining a fourth axis parallel to said third axis and spaced therefrom a third distance, an output connection point spaced aPart from said fourth axis a distance equal to said third distance, the third and fourth axes and output connection point forming a second isosceles triangle; and a second coupling member having a pivotal connection to said fifth coupling about said fourth axis and a pivotal connection to a second fixed point about an axis parallel to said fourth axis and spaced therefrom a distance equal to said third distance; said second distance and a distance between the input axis and the first fixed point being such that the axis of said third coupling has a reciprocating motion along a path having acute reversing points upon rotation of said input member about said input axis, said reciprocating motion being symmetrical about the line passing through said first fixed point, and said second fixed point being situated approximately along said line of symmetry.
Claim 6
Dependent Claim
63 words
A device as claimed in claim 3 wherein: AB (1.73 + or - 0.17)k L1 (1.41 + or - 0.14)k AB being the distance between said first fixed point and said input axis, k being the first distance, and L1 being the second distance, and the equal-length sides of said first isosceles triangle form an angle of appoximately 120* at the second axis.
Claim 7
Dependent Claim
41 words
A device as claimed in claim 4 wherein: BC (3.46 + or - 0.34)k BC being the distance between said second fixed point and said first fixed point, and said second isosceles triangle is approximately congruent to said first isosceles triangle.
Claim 8
Dependent Claim
175 words
A device as claimed in claim 5 comprising in addition bar parallelogram means for providing a remote output connection, said parallelogram means comprising members forming first and second parallelograms, said first parallelogram comprising a first member pivotly connected to said second isoscele coupling triangle at said output point, a second member pivotably connected to said fifth coupling at said fourth axis, and a third member pivotably connected to said first and second members so arranged as to form a parallelogram linkage; said second parallelogram comprising a fourth member pivotably connected to said second fixed point, a fifth member pivotably connected to said fourth member and to the connection between said second and third members so arranged as to form with said second member and said second coupling member a parallelogram linkage, whereby a reciprocating motion will be imparted to connection device connected to said first member of said first parallelogram by rotation of the input member, said reciprocating motion having a direction at the reversing points perpendicular to a connection line between the reversing points.
References Cited (Backward Citations)
US2780404A
Cited
US3686963A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-24 | 1978-08-26 | 1979-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-24 | 1982-08-26 | 1983-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-24 | 1986-08-26 | 1987-02-25 | $7700.00 | Window Closed / Lapsed |