# US 3,994,543 A · Shaft locking device

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- Number: US 3,994,543 A
- Document ID: US3994543A
- Status: Granted
- Kind: A
- Application number: 05/553,985
- Filed: 1975-02-28
- Granted: 1976-11-30
- Earliest claimed: 1975-02-28
- Assignees: Lamcor, Inc.
- Inventors: Simeon A. Melugin
- Web page: https://patentgrep.com/patent/US3994543A

## CPC

- F16C 13/04: Bearings with only partial enclosure of the member to be borne; Bearings with local support at two or more points
- Y10T 292/432: Sliding catch
- Y10T 403/602: by separate spring
- F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A locking device having a partial bearing surface formed by a shaft cradle. A restraining enclosure is formed by the shaft cradle and a slidably reciprocating detent having a recess therein, the detent being urged to form said restraining enclosure by a tension means.

## Claims

### Claim 1

A shaft lock comprising:
at least one slidably reciprocatable detent having a recess therein and adapted to be reciprocated by the insertion of a shaft within said shaft lock recess;
at least one shaft cradle cooperating with said detent recess so as to form a shaft lock enclosure adapted for the restraint of a rotatable shaft said shaft cradle being provided by a pair of roller members whose axis of rotation is below the center of said shaft lock enclosure; and
tension means coupled to said detent which urges said detent to form said shaft lock enclosure with said shaft cradle.

### Claim 2 (depends on 1)

The shaft lock claimed in claim 1 wherein said detent is provided with at least one slot for slidably reciprocating said detent in opposition to said tension means.

### Claim 3 (depends on 1)

The shaft lock claimed in claim 1 wherein said shaft cradle has the exterior circumferential surface of said roller members forming a partial bearing surface for a rotatable shaft.

### Claim 4

A journal restraint comprising:
first and second detents having a shaft lock recess therein and being further provided with at least one slot, said slot allowing said detents to be slidably reciprocated by the application of a force having a component parallel to the centerline of said slot, said force being provided by the insertion of a shaft within said shaft lock recess;
first and second shaft cradles cooperating with said shaft lock recess of said first and second detents respectively so as to form first and second journal lateral and longitudinal restraining enclosures having substantially the same centerline, said shaft cradles being provided with a pair of roller members which form a partial bearing surface for said journal the axes of rotation of said roller members being lower than said journal enclosures; and
a tension means positioned between said first and second detents and a fixed frame, said tension means having a centerline substantially parallel to the centerline of said slots, said tension means urging said first and second detents to form said first and second journal restraining enclosures with said first and second shaft cradle roller members.