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US5293989A Expired / Lapsed US ⏱️ 0.0 years remaining

Chain conveyor link provided with a pin-locking device

Assignee: Regina Sud SpA
•
Filing: 1993-06-02
•
Granted: 1994-03-15
•
Expires: 2013-06-02
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Abstract

Abstract A link (10) of a chain conveyor has a plane (12) region terminating at at least one end thereof with an enlarged articulation element (13) projecting downwardly from the plane (12) and passed through by a hole (15) parallel to the plane (12) for the introduction of a pivot pin (11). The enlarged element (13) has at least at one end (17) close to the hole (15) opening, a plug (18) preventing the pivot pin (11) from slipping out of the hole itself. The plug (18) has facing parallel resilient arms (20, 21) terminating with undercut teeth (22, 23) projecting towards each other for fitting in corresponding rectilinear undercuts (29, 30) disposed parallelly on opposite sides of the enlarged element (13) close to the hole (15) opening. The plug (18) further comprises a projection (26) between said arms (21, 21) that is designed to be fitted in the pin-receiving hole (15) for preventing the plug (18) from sliding in at least one direction normal to the pin on fitting of the teeth (22, 23) in the corresponding undercuts (29, 30).

Inventors

  • 👤 Carlo Garbagnati

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-09 13:51
CPC Classifications
B; B65; B65G; B65G17/00; B65G17/06; B65G17/08; B65G2201/00; B65G2201/02; B65G2207/00; B65G2207/12

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 179 words
Link (10) of a chain conveyor having a plane (12) region thereof terminating at at least one end with an enlarged articulation element (13) projecting downwardly from the plane (12) and passed through by a hole (15) parallel to the plane (12) for the introduction of a pivot pin (11), said enlarged element (13) having at least at one end (17) close to the hole (15), a plug (18) preventing the pivot pin (11) from slipping out of the hole itself, the plug (18) being provided with facing parallel resilient arms (20, 21) terminating with undercut teeth (22, 23) projecting towards each other for fitting in corresponding rectilinear undercuts (29, 30) disposed parallelly on opposite sides of the enlarged element (13) close to the hole (15), the plug (18) further comprising a projection (26) between said arms (21, 21) that is designed to be fitted in the pin-receiving hole (15) for preventing the plug (18) from sliding in at least one direction normal to the pin on fitting of the teeth (22, 23) in the corresponding undercuts (29, 30).
Claim 2
Dependent Claim 179 words
Link (10) of a chain conveyor having a plane (12) region thereof terminating at at least one end with an enlarged articulation element (13) projecting downwardly from the plane (12) and passed through by a hole (15) parallel to the plane (12) for the introduction of a pivot pin (11), said enlarged element (13) having at least at one end (17) close to the hole (15), a plug (18) preventing the pivot pin (11) from slipping out of the hole itself, the plug (18) being provided with facing parallel resilient arms (20, 21) terminating with undercut teeth (22, 23) projecting towards each other for fitting in corresponding rectilinear undercuts (29, 30) disposed parallelly on opposite sides of the enlarged element (13) close to the hole (15), the plug (18) further comprising a projection (26) between said arms (21, 21) that is designed to be fitted in the pin-receiving hole (15) for preventing the plug (18) from sliding in at least one direction normal to the pin on fitting of the teeth (22, 23) in the corresponding undercuts (29, 30).
Claim 3
Dependent Claim 30 words
Link according to claim 1, characterized in that the undercuts (29, 30) on the sides of the enlarged element (13) extend in a direction normal to the link plane (12).
Claim 4
Dependent Claim 42 words
Link according to claim 1, characterized in that the end (17) of the enlarged element (13) is recessed for receiving the plug (18) within the dimensions of the plane (12) forming an abutment (31) for a side edge (32) of the plug.
Claim 5
Dependent Claim 31 words
Link according to claim 3, characterized in that said side edge (32) of the plug is flat so that its shape substantially matches that of a portion of the link plane.
Claim 6
Dependent Claim 26 words
Link according to claim 1, characterized in that the enlarged element (13) has a generally rounded section, the plug outline following said section at least partly.

References Cited (Backward Citations)

US4832187A Cited
US4709807A Cited
US4858753A Cited
US5020659A Cited
US5000312A Cited
US4893710A Cited
US5125504A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1997-03-14 1997-09-13 1998-03-15 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2001-03-14 2001-09-13 2002-03-15 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2005-03-14 2005-09-13 2006-03-15 $7700.00 Window Closed / Lapsed

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