Linear actuator

Details Linear actuator Linear actuator

2005-08-23

2005-08-23

Look, Edward K. (Department: 3745)

Expansible chamber devices

With inspection window in expansible chamber wall portion

With lock

C092S1650PR

Reexamination Certificate

active

06931982

ABSTRACT:
A rotation-preventing slide is provided for a linear actuator which includes a housing which defines an internal bore and a piston-rod assembly which linearly moves within the internal bore in response to fluid pressure. The rotation-preventing slide is connected to and moves with the piston-rod assembly within a guide defined by the housing and has a geometry (e.g., polygonal, rectangular, square) which prevents rotation of the piston-rod assembly. The slide may include a bearing block and an attachment member which extends through an opening in the bearing block and which is removably attached to the piston-rod assembly whereby the slide's bearing surface (e.g., the bearing block) may be easily replaced. The guide may be a guide slot position parallel to, but axially offset from, the internal bore.

REFERENCES:
patent: 2956549 (1960-10-01), Malpass
patent: 4406215 (1983-09-01), Lacasse
patent: 4731886 (1988-03-01), Heinrich et al.
patent: 5351599 (1994-10-01), Stoll
patent: 5568760 (1996-10-01), Volzer
patent: 5761985 (1998-06-01), Stoll
patent: 5974948 (1999-11-01), Thompson et al.
patent: 6170806 (2001-01-01), Mintgen et al.

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