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US3829176A Expired / Lapsed US ⏱️ 0.0 years remaining

Stretcher-pulleys

Assignee: Peugeot & Renault
•
Filing: 1973-04-19
•
Granted: 1974-08-13
•
Expires: 1993-04-19
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Abstract

Abstract This stretcher-pulley associated with transmissions of internal combustion engines, comprises a roller mounted for loose rotation on a crankpin adjustable by pivoting about a fixed pin disposed eccentrically in relation to the crankpin axis under the control of resilient means constantly urging said roller against the belt to be stretched, characterised in that said crankpin is connected to the cylinder-block of the engine by means of a bearing base having substantially the same diameter as said roller and concentric thereto, said base having formed in its peripheral portion a hole in which the eccentric pivot pin rigid with the cylinder-block is fitted, a cavity being formed in said base for receiving said resilient means on the side of said base which engages said cylinder-block, an anchor stud extending through the axial portion of said crankpin, said cavity and an elongated orifice permitting the movements of said crankpin about its eccentric axis, said stud acting in actual service as a means for pressing the bearing surface of said crankpin base against said cylinder-block.

Inventors

  • 👤 S Miokovic

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-07 12:40
CPC Classifications
F; F16; F16H; F16H7/00; F16H7/08; F16H7/10; F16H7/12; F16H7/1254; F16H7/1281; F16H2007/0802; F16H2007/081

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 171 words
Stretcher-pulley associated with transmissions of internal combustion engines, comprising a roller mounted for loose rotation on a crankpin adjustable by pivoting about a fixed pin disposed eccentrically in relation to the crankpin axis under the control of resilient means constantly urging said roller against the belt to be stretched, characterised in that said crankpin is connected to the cylinder-block of the engine by means of a bearing base having substantially the same diameter as said roller and concentric thereto, said base having formed in its peripheral portion a hole in which the eccentric pivot pin rigid with the cylinder-block is fitted, a cavity being formed in said base for receiving said resilient means on the side of said base which engages said cylinder-block, an anchor stud extending through the axial portion of said crankpin, said cavity and an elongated orifice permitting the movements of said crankpin about its eccentric axis, said stud acting in actual service as a means for pressing the bearing surface of said crankpin base against said cylinder-block.
Claim 2
Dependent Claim 171 words
Stretcher-pulley associated with transmissions of internal combustion engines, comprising a roller mounted for loose rotation on a crankpin adjustable by pivoting about a fixed pin disposed eccentrically in relation to the crankpin axis under the control of resilient means constantly urging said roller against the belt to be stretched, characterised in that said crankpin is connected to the cylinder-block of the engine by means of a bearing base having substantially the same diameter as said roller and concentric thereto, said base having formed in its peripheral portion a hole in which the eccentric pivot pin rigid with the cylinder-block is fitted, a cavity being formed in said base for receiving said resilient means on the side of said base which engages said cylinder-block, an anchor stud extending through the axial portion of said crankpin, said cavity and an elongated orifice permitting the movements of said crankpin about its eccentric axis, said stud acting in actual service as a means for pressing the bearing surface of said crankpin base against said cylinder-block.
Claim 3
Dependent Claim 40 words
Stretcher-pulley according to claim 1, characterised in that said resilient means consist of a coil spring having one end engaged in an axial hole of said crankpin and the other end engaged against an abutment pin rigid with the cylinder-block.
Claim 4
Dependent Claim 56 words
Stretcher-pulley according to claim 1, characterised in that said resilient means comprises a blade spring having one end attached to an anchor pin rigid with the cylinder-block, said blade passing over an eccentric bearing pin disposed within the cavity of said crankpin base, the other end of said blade being wound on said central anchor stud.
Claim 5
Dependent Claim 32 words
Stretcher-pulley according to claim 1, characterised in that the bearing surface of said crankpin base comprises a central cavity whereby only a peripheral aNnular portion is caused to bear against said cylinder-block.

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) 1977-08-12 1978-02-11 1978-08-13 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-08-12 1982-02-11 1982-08-13 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-08-12 1986-02-11 1986-08-13 $7700.00 Window Closed / Lapsed

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