Abstract

A ladder comprises two stiles and at least a step unit mounted between the two stiles. The step unit includes a hollow step, an inner sleeve and an outer sleeve. The inner sleeve is fit into the hollow step, at an end of which a position restriction portion is located to prevent the inner sleeve …

Legal parties

Party
Inventors (applicants): Luhao Leng
Assignees (initial): New-Tec Integration (Xiamen) Co., Ltd. (Xiamen, CN
Agents: Rabin & Berdo, P.C. (attorney)

The application was examined by Alvin Chin Shue (USPTO dept. 3634), Colleen M Chavchavadze

Claims

  • 1. A ladder comprising: …
  • 2. The ladder according to claim 1 , wherein the circumference of the constricting opening …
  • 3. The ladder according to claim 2 , wherein said fastener is a self-tapping screw. …

International priority data

CN: 2008 2 0101013 U / Dec. 29, 2007 (national)
CN: 2008 2 0176147 U / Nov. 6, 2008 (national)

Cited documents

Patents

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Drawings

Brief Description of the Drawings

The present invention will become apparent upon the reference of the accompanying drawings and the description of the preferred embodiment. FIG. 1 illustrates the perspective exploded view of the cooperation …

Description

Field of the Invention

The present invention relates …

Detailed Description of the Embodiments

Please refer to FIG. 1 and FIG. 2 , a ladder comprising two stiles 10 and a plurality of step units 20, said step units 20 are mounted between the two stiles …

Industrial Applicability

The ladder of the present invention, its step unit is mounted between the two stiles, said step unit comprising hollow steps, inner sleeve and outer sleeve, said inner sleeve is fit …

More details about Ladder

Miscellaneous patent data

The application number is 12/671,286 (U.S.), the patent extension term is 329 days, 10 figures are supplied with the description, categorized under Hollow rung as a primary classification, the invention description is illustrated by 7 drawings, includes the following drawings: perspective exploded view of the cooperation, sectional view of the cooperation, Ladder, sectional view of the cooperation, the assignee company is New-Tec Integration (Xiamen) Co., Ltd. located in Xiamen (CN), the known inventor's name is Leng Luhao, the known applicant's name is Leng Luhao, the assignee classification - a foreign company or corporation, the invention is named Ladder, the claim 1 is exemplary as chosen by the examiner, developed by Luhao Leng, similar categories include Platform with ladder as support, Rope or chain ladders, capable of being elevated or extended, Terminal foot or shoe, non-rigid longitudinal members, means for retarding unwinding of strand type escape, supporting struts formed as poles, sliding carrier, Storage providing component, Ladders having platforms foldable with the ladder, the patent particularly claims a ladder comprising: two…, the grant publication date is Mar. 11, 2014, the grant publication number is 08668049, the application was published on Dec. 29, 2008, the published agent's organization is Rabin & Berdo, P.C., the application was examined by Alvin Chin Shue, the assistant examiner Colleen M Chavchavadze (3634 USPTO department), 6 claims comprise the protection scope.

Invention classification information

The invention is classified under Special construction of longitudinal members, or rungs or other treads, Sleeve-type connection, Hollow rung, Bracket-type connection. The designated search classifications include Rung or Rung-To-Stile Connection, Bracket-type connection, Hollow rung, Sleeve-type connection.

Patent details
Publication number 08668049
Publication date Mar. 11, 2014
Kind code B2
Application number 12/671,286
Application date Dec. 29, 2008
Application type U
Application series code 12
Int. pub. country WO
Int. pub. number WO2009/089759
Int. publication Jul. 23, 2009
Int. filing country WO
Int. filing PCT/CN2008/073814
Filed internationally Dec. 29, 2008
National stage date Jan. 29, 2010
Extension term 329
National classification 182/228.6
Total number of claims 6
Exemplary claims 1
Number of drawings 7
Number of figures 10
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