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Patent 21416 Summary

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Claims and Abstract availability

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(12) Patent: (11) CA 21416
(21) Application Number: 21416
(54) English Title: ROCK DRILL
(54) French Title: FORET DE MINE
Status: Term Expired - Post Grant Beyond Limit
Bibliographic Data
(51) International Patent Classification (IPC): N/A
(72) Inventors :
  • MILLER, GEORGE A. (Canada)
  • MILLER, CHARLES H. (Canada)
  • COE, FREDERICK W. (United States of America)
  • HOFFNAGLE, GEORGE A. (United States of America)
  • MITCHELL, JAMES (Canada)
(73) Owners :
  • GEORGE A. MILLER
  • CHARLES H. MILLER
  • FREDERICK W. COE
  • GEORGE A. HOFFNAGLE
  • JAMES MITCHELL
(71) Applicants :
(74) Agent:
(74) Associate agent:
(45) Issued: 1885-04-14
(22) Filed Date:
Availability of licence: N/A
Dedicated to the Public: N/A
(25) Language of filing: English

Patent Cooperation Treaty (PCT): No

(30) Application Priority Data: None

Abstracts

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Claims

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Claim.-lst. The combination. in a rock-drilling machine, of the frame U carrying the hammer and pivoted, as described a shaft suitably journalled, and having keyed thereon. cams G, I1 and L a pivoted latch i, adapted to be intermittently lifted by the cam 11, A, jam-wrench K connected with the latch i to be lifted therewith and bite the drill-rod, and a lever N arranged and operating, as specified, to rotate the jam-wrench, substantially as set forth 2nd. The combination, in a rook-drill, of the frame D carrying the hammer. and pivoted, as described, a shaft F, actuating means for reciprocating the drill-rod, and hammer, the waved wheel I, lever N having spring attached them o, so as to keep the upper end of said lever in contact with the waved wheel, and a connecting-rod a attached to the lever is and to devices for rotating the drill-rod, substantially as set forth.
Description

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Representative Drawing

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Administrative Status

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Event History

Description Date
Inactive: Expired (old Act Patent) latest possible expiry date 1903-04-14
Grant by Issuance 1885-04-14

Abandonment History

There is no abandonment history.

Owners on Record

Note: Records showing the ownership history in alphabetical order.

Current Owners on Record
GEORGE A. MILLER
CHARLES H. MILLER
FREDERICK W. COE
GEORGE A. HOFFNAGLE
JAMES MITCHELL
Past Owners on Record
None
Past Owners that do not appear in the "Owners on Record" listing will appear in other documentation within the application.
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