THROTTLE SLEEVE FOR FLUID-POWERED DEVICE

• US 3,645,500 A
• Filed: 08/21/1970
• Issued: 02/29/1972
• Est. Priority Date: 08/21/1970
• Status: Expired due to Term

• Current Assignee: Master Power, Inc. (Eaton Corporation PLC.)
• Original Assignee: Harvey J. Walter
• Inventors: Walter, Harvey J.
• Primary Examiner(s): Scott, Samuel
• Application Number:
  US05/065,951
• Time in Patent Office: 557 Days
• Field of Search: 251/340,341,347,342,345,352,251
• US Class Current: 251/340
• CPC Class Codes: F16K 31/528 with pin and slot

Abstract

A portable pneumatic device including an elongated housing having a rotary pneumatic motor therein. Pressurized air is delivered to the rear end of the housing to drive the motor and rotate a tool disposed at the front of the housing. Airflow to the motor is controlled by a throttle valve actuated by a rotatable cam sleeve or collar disposed on the housing. The sleeve is constructed to maximize ease of control of the tool and minimize the possibility of inadvertent or accidental tool operation.

Claims

1. A fluid device of the type including a housing, a throttle valve in said housing, said valve including longitudinal passage means, means defining an annular seat around said passage means, means defining an annular seat around said passage means, a ball normally biased into engagement with said seat and movable laterally thereof to open said valve, manual means for moving said ball, said manual means including a collar rotatable on said housing and operatively engageAble with said ball through cam means, whereby rotation of said collar controls said valve, said operative engagement including a detent pin slidable radially of said housing and having one end engageable with said ball and its other end engageable with a surface on said collar, said surface having spaced detent recesses adapted to receive said other pin end, whereby to retain said collar is selected rotated positions.

2. A device as defined in claim 1 wherein said pin bears generally radially of said collar against said surface, said collar including another surface engageable with said pin in a direction axially of said collar, resilient means normally biasing said collar axially against said pin, said another surface having spaced recesses therein spaced arcuately from the detent recesses in said first-mentioned surface, whereby to retain said collar in other selected rotated positions.

3. A device as defined in claim 2 wherein said first-mentioned surface has relatively deep portions aligned with the recesses in said another surface, said detent recesses being relatively shallow.

4. A construction as defined in claim 1 wherein said cam means includes a first surface on the interior of said collar engageable with said detent pin a second interior surface on said sleeve engageable with said detent pin, and resilient means normally biasing said collar in a direction to engage said second surface and said detent pin.

5. A construction as defined in claim 4 wherein said pin is mounted on said housing for movement in one plane only, said first and second surfaces intersecting one another, said second surface being biased against said pin in a direction transverse to its direction movement.

6. A construction as defined in claim 5 wherein said engaging first surface and pin retains said collar in said first position and said engaging second surface and said pin retains said collar in said second position.

7. A construction as defined in claim 1 wherein said cam means includes first and second intersecting annular surfaces formed internally of said sleeve, said detent pin being movable transversely of said passage means by engagement with said first surface during rotation of said sleeve, means biasing said sleeve axially of said passage means whereby to engage said pin and said second surface.