US 11,707,775 B2
Stock lifter assembly
Scott M. Breen, Ada, MI (US); and Joel T. Pyper, Holland, MI (US)
Assigned to STANDARD LIFTERS, INC., Grand Rapids, MI (US)
Filed by STANDARD LIFTERS, INC., Grand Rapids, MI (US)
Filed on Mar. 3, 2022, as Appl. No. 17/685,852.
Application 17/685,852 is a continuation in part of application No. 16/726,307, filed on Dec. 24, 2019, granted, now 11,267,036.
Claims priority of provisional application 62/785,393, filed on Dec. 27, 2018.
Prior Publication US 2022/0184684 A1, Jun. 16, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. B21D 37/00 (2006.01); B21D 37/08 (2006.01); B21D 43/02 (2006.01); B21D 45/02 (2006.01); B30B 15/32 (2006.01); B21J 13/14 (2006.01); B30B 15/02 (2006.01); B21J 9/02 (2006.01)
CPC B21D 37/08 (2013.01) [B21D 43/023 (2013.01); B21D 45/02 (2013.01); B21J 9/022 (2013.01); B21J 13/14 (2013.01); B30B 15/028 (2013.01); B30B 15/32 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A multi-station progressive metal forming die having a stock lifter assembly and has at least two mutually converging and diverging die members between which a stock piece is shifted longitudinally to form at least one part from the stock, the stock lifter assembly, comprising:
a generally cylindrical guide pin body with an outer end portion oriented toward the stock piece, an inner end portion oriented away from the stock piece, and a medial portion between the outer end portion and the inner end portion, wherein:
said outer end portion includes an outer end surface with a ring groove; and
said inner end portion includes a retainer groove on the generally cylindrical guide pin body;
a cap insert having an outer end portion oriented toward the stock piece and an inner end portion oriented away from the stock piece, a head ring with a central aperture, having an internal shoulder, said central aperture surrounds at least a portion of said cap insert, said head ring has a diameter that is wider than the diameter of said generally cylindrical guide pin body;
a ring member coupled to said ring groove that contacts said internal shoulder of said head ring;
a base having an outer end portion oriented toward the stock piece and an inner end portion oriented away from the stock guide, with a guide pin aperture extending through the base, wherein:
said outer end portion of said base has a first diameter; and
said inner end portion of said base has a second diameter that is larger than said first diameter, forming a shoulder on the exterior surface of said base, and an inner end surface;
a spring member having a generally hollow interior with an outer end portion oriented toward the stock piece and an inner end oriented away from the stock piece, wherein:
said outer end portion contacts a surface of said head ring; and
said inner end portion contacts said shoulder on an exterior surface of said base; and
a retainer received on said retainer groove on said inner end portion of said guide pin body, said retainer contacting said inner end surface of said base when said stock lifter assembly is fully raised.