Title: Manual control apparatus

Abstract: A manual override apparatus for use with normally, automatically, powered driving assemblies such as valve actuators, the override apparatus having a body with a bore therethrough, a housing secured to the body and having an axial bore which registers with the bore in the body, a rotatable split drive nut mounted in the housing, a drive screw extending into the registering bores in the body and the housing and mounted for axial movement therein, a camming system for selectively engaging and disengaging the drive nut with the drive screw whereby engagement of the drive screw with the drive nut and rotation of the drive nut causes axial movement of the drive screw, and a biasing assembly operatively connected to the split drive nut which exerts a biasing engagement force on the drive nut when a given magnitude of resistance to engagement is encountered.

Do you think this is a good invention? Vote now:

Votes so far: For:(0) Against:(0)
Other info:

Inventors: Killian, Henry R. (Sugarland, TX, US)

Application Number: 877689
Filing Date: 1978-02-13
Publication_date: 1980-02-26
Assignee: Keystone International, Inc. (Houston, TX)
Primary Class(es): 74/89.38
Other Classes:
US Patent Ref:

1454574	May, 1923	Bown	74/424.
1905569	Apr, 1933	Papellin	74/424.
3733914	May, 1973	Sheesley	74/424.
3961547	Jun, 1976	Shainberg et al.	74/424.

Other Refs:
Primary Examiner: Husar, C. J.
Assistant Examiner: Berman, Conrad
Attorney: Browning, Bushman & Zamecki