Depth stop for a drilling machine

• US 4,113,404 A
• Filed: 04/28/1977
• Issued: 09/12/1978
• Est. Priority Date: 05/03/1976
• Status: Expired due to Term

• Current Assignee: Hilti Aktiengesellschaft (Hilti Martin Family Trust)
• Original Assignee: Hilti Aktiengesellschaft (Hilti Martin Family Trust)
• Inventors: Lippacher, Wolfgang, Teger, Gerhard
• Primary Examiner(s): Vlachos, Leonidas
• Application Number:
  US05/791,950
• Time in Patent Office: 502 Days
• Field of Search: 408/72 R, 408/202, 408/203, 408/112, 408/113-116, 408/241 R, 408/241 S, 408/236, 408/237, 408/712, 408/4, 408/14, 83/467 R, 83/468, 82/34 A
• US Class Current: 408/241.00S
• CPC Class Codes: B23B 2260/088 Indication scales
• CPC Class Codes: B23B 49/006 Attached to drilling machines
• CPC Class Codes: Y10T 408/566 Axially fixed to Tool
• CPC Class Codes: Y10T 408/8925 Depth-limiting member
• CPC Class Codes: Y10T 408/99 Adjustable stop
• CPC Class Codes: Y10T 82/2574 Stop [e.g., carriage, tool, work, etc.]
• CPC Class Codes: Y10T 83/76 With scale or indicator

Abstract

A depth stop is mounted on the casing of a drilling machine and includes a clamping lever with a bore through which an elongated rod extends. The rod acts as the stop. Lugs attached to the casing pivotally support the clamping lever. The lever has a clamping surface which engages the surface of the casing in the clamped position. The clamping surface extends circumferentially of the axis of the bore in the lever and is arranged eccentrically relative to the axis.

Claims

1. On a drilling machine including a casing, a depth stop mounted on said casing, said depth stop comprising an axially displaceable rod, wherein the improvement comprises a clamping lever having a bore therethrough with said rod extending through the bore, said lever being elongated and extending transversely of the axial direction of the bore therethrough, said lever having a clamping surface thereon and being pivotally displaceable about the axis of the bore therethrough for movement of the clamping surface into and out of contact with the casing so that with the clamping surface bearing on said casing, said rod is held against axial displacement, said clamping surface extending circumferentially of the axis of the bore and being arranged eccentrically of the axis, and a pair of bearing lugs secured to said casing and spaced apart in the axial direction of said rod, said lever being pivotally supported on said lugs.

2. On a drilling machine, as set forth in claim 1, wherein one of said lever and said lugs having protuberances thereon and the other having recesses therein with said protuberances engaging within said recesses.

3. On a drilling machine, as set forth in claim 2, wherein each said lug having a bore therethrough with said rod extending through the bores in said lugs, each said lug having a surface facing toward a surface on the other said lug, each said surface having one said recess formed therein, said lever being positioned between said lugs and having a pair of oppositely projecting said protuberances thereon each extending into one of said recesses in the adjacent said lug for supporting said lever in said lugs.

4. On a drilling machine, as set forth in claim 3, wherein said lever having an elongated slot therein extending transversely of the axial direction of the bore therethrough.

5. On a drilling machine, as set forth in claim 4, wherein said lever having a first end and a second end with the bore therethrough being located between said first and second ends and said clamping surface located at said first end, said slot extending from said first end on said lever across the bore therethrough and from the bore toward and terminating short of said second end.

6. On a drilling machine, as set forth in claim 3, wherein said recesses in said lugs having a larger cross sectional area than the cross sectional area of said protuberances so that radial play is provided between said protuberances and said recesses.

7. On a drilling machine, as set forth in claim 1, wherein at least one end of said rod having a laterally outwardly extending shoulder for preventing displacement of said rod through the bores in said lugs and said lever.