Patent US4121691A successfully refreshed from Google Patents.
US4121691A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite inspection plate-step
Assignee: Caterpillar Inc
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Filing: 1977-10-17
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Granted: 1978-10-24
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Expires: 1997-10-17
Abstract
Abstract A composite inspection plate-step has a first member and at least one step member. The first member has a middle portion and inner and outer surfaces. The first member has at least one opening of a preselected configuration through the middle portion and is defined by a lower edge. The step member has first and second portions and is of a generally "J" configuration. The first portion extends substantially completely across and a preselected distance through the opening in the first member and is fixedly connected to the lower edge of the opening and is generally horizontal in the installed position. The second portion is fixedly connected to the outer surface of the first member. The first member is releaseably connected over an inspection port of associated structure by fastening means.
Inventors
- 👤 Eugene M. Poplawski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:18
CPC Classifications
B; B60; B60R; B60R3/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
139 words
A composite inspection plate-step, comprising: a first member having a middle portion, inner and outer surfaces, and at least one opening of preselected configuration through said middle portion, said opening being defined by a lower edge; a step member having first and second portions and being of a general "J" configuration, said first portion extending substantially completely across and a preselected distance through the first member opening and being fixedly connected to and oriented generally normal to the lower edge and generally horizontal in the installed position of the first member, and said second portion having at least one opening being of a size sufficient for receiving the fingers of a man's hand being fixedly connected to the outer surface of said first member; and means for releasably connecting the first member over an inspection port of associated structure.
Claim 2
Dependent Claim
139 words
A composite inspection plate-step, comprising: a first member having a middle portion, inner and outer surfaces, and at least one opening of preselected configuration through said middle portion, said opening being defined by a lower edge; a step member having first and second portions and being of a general "J" configuration, said first portion extending substantially completely across and a preselected distance through the first member opening and being fixedly connected to and oriented generally normal to the lower edge and generally horizontal in the installed position of the first member, and said second portion having at least one opening being of a size sufficient for receiving the fingers of a man's hand being fixedly connected to the outer surface of said first member; and means for releasably connecting the first member over an inspection port of associated structure.
Claim 3
Dependent Claim
25 words
A composite inspection plate-step, as set forth in claim 1, wherein the first portion of the step member contains a multiplicity of holes extending therethrough.
Claim 4
Dependent Claim
39 words
A composite inspection plate-step, as set forth in claim 1, including a toe stop member having first and second flanges and being of a generally "U" configuration, said flanges being connected to the inner surface of the first member.
Claim 5
Dependent Claim
25 words
A composite inspection plate-step, as set forth in claim 3 wherein the toe stop member has at least one opening in a lower edge thereof.
Claim 6
Dependent Claim
27 words
The composite inspection plate-step, as set forth in claim 1 wherein the opening in the first member are of a size sufficient for receiving a man's foot.
Claim 7
Dependent Claim
25 words
A composite inspection plate-step, as set forth in claim 3 wherein the first portion of the step member is connected to the toe stop member.
Claim 8
Dependent Claim
28 words
A composite inspection plate-step as set forth in claim 1, wherein the first portion of the step member is connected to the flanges of the toe stop member.
Claim 9
Dependent Claim
19 words
A composite inspection plate-step, as set forth in claim 1, wherein said inspection plate-step is connected to a tractor.
Claim 10
Dependent Claim
19 words
A composite inspection plate-step, as set forth in claim 1, wherein said inspection plate-step is connected to a truck.
Claim 11
Dependent Claim
22 words
A composite inspection plate-step, as set forth in claim 1, wherein said inspection plate-step is connected to structure fixed to the ground.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-10-23 | 1982-04-24 | 1982-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-23 | 1986-04-24 | 1986-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-23 | 1990-04-24 | 1990-10-24 | $7700.00 | Window Closed / Lapsed |