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US3705525A Expired / Lapsed US ⏱️ 0.0 years remaining

Die unloader

Assignee: ThyssenKrupp Budd Co
•
Filing: 1970-10-15
•
Granted: 1972-12-12
•
Expires: 1990-10-15
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Abstract

Abstract A ram driven, mechanically synchronized die unloader for extending into a blanking press under the upper die of a positive knockout die for receiving and removing the stamped blank from the die.

Inventors

  • 👤 Richard C Gilmour
  • 👤 Vincent A Kaitz
  • 👤 Adolph W Lemberger

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-06 11:06
CPC Classifications
B; B21; B21D; B21D45/00; Y; Y10; Y10T; Y10T83/00; Y10T83/202; Y10T83/2092; Y10T83/2096; Y10T83/2098; Y10T83/2135; Y10T83/2148; Y10T83/22; Y10T83/2203

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 166 words
A die unloadEr for forming press having a frame, a die bed, a reciprocating ram, an upper die secured to said ram for movement therewith, a lower die secured to said die bed for cooperatively engaging said upper die to form a stamping at the bottom of the ram stroke and ejector pins for removal of a stamping from said die, said die unloader including a support bracker secured to said frame, a carriage having a receiving position and a discharge position and being movable therebetween linkage means operably interconnecting said ram and said carriage for moving said carriage between said positions during reciprocal movement of said ram, and a track means for supporting and guiding said carriage between said positions, said track means includes a T shaped track having one end supported on said frame and the other end supported on an adjustable member for vertically adjusting the height of one end of said track for proper alignment of said carriage relative to said dies.
Claim 2
Dependent Claim 166 words
A die unloadEr for forming press having a frame, a die bed, a reciprocating ram, an upper die secured to said ram for movement therewith, a lower die secured to said die bed for cooperatively engaging said upper die to form a stamping at the bottom of the ram stroke and ejector pins for removal of a stamping from said die, said die unloader including a support bracker secured to said frame, a carriage having a receiving position and a discharge position and being movable therebetween linkage means operably interconnecting said ram and said carriage for moving said carriage between said positions during reciprocal movement of said ram, and a track means for supporting and guiding said carriage between said positions, said track means includes a T shaped track having one end supported on said frame and the other end supported on an adjustable member for vertically adjusting the height of one end of said track for proper alignment of said carriage relative to said dies.
Claim 3
Dependent Claim 32 words
The die unloader is claimed in claim 1 wherein said carriage includes upper rollers and lower rollers for engaging the respective upper and lower surfaces of said T shaped track cross member.
Claim 4
Dependent Claim 173 words
The die unloader as claimed in claim 1 wherein said linkage means includes a bell crank having a first arm and a second arm and a pivotal connection at the juncture of said arms, a support member secured to said frame, said pivotal connection supported on said support member, a first drag link having one end pivotally connected to said first arm and the other end pivotally connected to said ram for pivoting said bell crank about said pivotal connection as said ram reciprocates, a second pivotal connection supported on said support member, a drive link having one end pivotally connected to said carriage for moving said carriage between said positions, and the other end pivotally secured to said second pivotal connection, a second drag link having one end pivotally connected to said second arm of said bell crank and the other end pivotally secured intermediate the ends of said drive link for moving said drive link and said carriage as said bell crank is pivoted by the reciprocal movement of said ram.
Claim 5
Dependent Claim 57 words
The die unloader as claimed in claim 3 including a drive arm adjustably secured to said ram for movement therewith, said drive arm having a portion thereof pivotally secured to said other end of first drag link whereby adjustment of said drive arm relative to the ram adjusts the positioning of said carriage relative to the ram.
Claim 6
Dependent Claim 54 words
The die unloader as claimed in claim 3 wherein said carriage includes tubular box structure, a plurality of arms adjustably supported on said box structure for entering between said dies as the ram approaches the top of its stroke and for receiving the stamping ejected from said upper die for removal from said press.

References Cited (Backward Citations)

US373943A Cited
US3349602A Cited
US679699A Cited
US1170455A Cited
US1736958A Cited
US2122648A Cited
US2693159A Cited
US3155241A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1975-12-12 1976-06-12 1976-12-12 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-12-12 1980-06-12 1980-12-12 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-12-12 1984-06-12 1984-12-12 $7700.00 Window Closed / Lapsed

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