Join
today

Boliven PRO is more than just patent search

  • Build and save lists using the powerful Lists feature
  • Analyze and download your search results
  • Share patent search results with your clients

Patents »

US4530530: Locking latch assembly for mounting an electronic component drawer in a rack

Share

Filing Information

Inventor(s) Lothar F. Schaefer ·
Assignee(s) SCHAEFER LOTHAR F ·
Attorney/Agent(s) Fred Philpitt ·
Primary Examiner Robert L. Wolfe ·
Assistant Examiner Lloyd A. Gall ·
Application Number US6422874
Filing date 09/23/1982
Issue date 07/23/1985
Predicted expiration date 09/23/2002
U.S. Classifications 292/256.75  · 267/153  ·
International Classifications B65D 4500  ·
Kind CodeA
International Classifications 292256.73;256.75;176 ·
Foreign Priority EP81710048.0 - 09/29/1981 ·
12 Claims, No Drawings


Abstract

In a locking latch assembly for mounting an electronic component drawer in a rack a clamping ring 30 is provided with plug and socket elements 46, 48 adapted to cooperate with a dynamometric key. An all metal hollow cylindrical spring cushion 44 is received within the cup-shaped clamping ring, a support stud 32 formed integral with the clamping ring 30 supporting the interior surface of the spring cushion along a portion of the axial extent thereof. The free end face of the spring cushion 44 forms a thrust bearing cooperating with a latch ring 52 adapted to receive a latch hook 60 fixed to the drawer. The clamp ring 30 runs on a threaded bolt 22 being in turn pivotally connected to drawer support rails 12 through a pivot pin 18.

Independent Claims | See all claims (12)

  1. 1. A locking latch assembly for mounting an electronic component drawer in a rack, comprising(a) a threaded bolt including joint means for pivotal connection to a rack, the pitch of the threadings of the threaded bolt being chosen so as to warrant self-locking under axial loads established under operational conditions,(b) a threaded clamp ring carried on the threaded bolt and including a spring chamber extending to one end face of the clamp ring,(c) spring means arranged in the spring chamber and(d) a latch ring arranged on the threaded bolt between the clamp ring and the joint means for free axial movement and including a conical counterbore flaring towards the free end of the threaded bolt and adapted to receive a latch hook of the drawer, the end face of the latch ring facing the clamp ring engaging the spring means, characterized in that(e) said spring means comprise a generally cylindrical sleeve-shaped all metal cushion,(f) said spring cushion is arranged between an outer circumferential wall of the spring chamber and a support stud axially projecting from a bottom wall of the spring chamber so as to provide a close fit therebetween in the radial direction only along a portion of its axial extension, and(g) said clamp ring is formed with first elements of a claw coupling adapted to cooperate with second complementary elements provided on a dynamometric key.
  2. 12.12. A locking latch assembly for mounting an electronic component drawer in a rack, comprising(a) a threaded bolt including joint means for pivotal connection to a rack, the pitch of the threadings of said threaded bolt insuring self-locking under axial loads established under operating conditions,(b) a cup-shaped, threaded clamp ring carried on said threaded bolt, including a spring chamber extending to one end face of said clamp ring, and being formed with elements of a claw coupling adapted to cooperate with complementary elements provided on a dynamometric key,(c) a latch ring arranged on said threaded bolt between said clamp ring and said joint means for free axial movement and including a conical counterbore flaring towards the free end of the threaded bolt and adapted to receive a latch hook of the drawer, an end face of the latch ring facing the clamp ring, and(d) spring means comprising a generally cylindrical sleeve-shaped metal cushion arranged in said spring chamber between an outer circumferential wall of said spring chamber and an inner support stud axially projecting from a bottom wall of said spring chamber so as to provide a close radial fit therebetween along only a portion of the axial length of said cushion spring, one end face of said cushion spring being adapted to engage the adjacent end face of said latch ring and provide a friction bearing surface.

References Cited

U.S. Patent Documents

Document NumberAssigneesInventorsIssue/Pub Date
US183290 Ensign et al. Apr 1918
US721990 Young Mar 1903
US1472619 STARRETT MFG CO Starrett Oct 1923
US1785400 WATSON FREDERICK W Watson Dec 1930
US2345364 SHERBROOKE MACHINERIES LTD Spafford Mar 1944
US2658710 ROBINSON AVIAT INC Titus Nov 1953
US2766799 ILLINOIS TOOL WORKS Poupitch Oct 1956
US2966187 TER COCK CHARS Ter Cock Dec 1960
US3060786 FLOWER ARCHIBALD T Flower Oct 1962
US3670795 WRIGHT BARRY CORP Kupfrian Jun 1972
US3756640 GEN AM TRANSPORT Johnson Sep 1973
US3907157 ICI LTD Beattie Sep 1975

Foreign Patent Documents

Document NumberAssigneesInventorsIssue/Pub Date
DE2112587STOP CHOC SCHWINGUNGSTECHNIK GSep 1972
FR1345046ELECTRONIQUE APPLIQUEEOct 1963

Patent Family

Document NumberAssigneeInventorsIssue/Pub Date
US4530530 SCHAEFER LOTHAR F Lothar F. Schaefer Jul 1985
DE3176103 STOP CHOC SCHWINGUNGSTECHNIK G SCHAEFER LOTHAR May 1987