US4462621A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Swivel stop
Assignee: CHAPMAN MANUFACTURING COMPANY Inc
•
Filing: 1981-05-29
•
Granted: 1984-07-31
•
Expires: 2001-05-29
Abstract
Abstract A swivel stop for use in lamps of all kinds comprising a lower tube and an upper tube, a member partially secured within the lower tube and partially extending therefrom and formed with a keyway and a stop, and a sleeve secured within the upper tube and provided with a pair of keys. The swivel stop preferably is designed in two versions: an extendable version and a non-extendable version.
Inventors
- 👤 Earle F. Chapman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:29
CPC Classifications
F; F21; F21V; F21V21/00; F21V21/14; F21V21/26; Y; Y10; Y10S; Y10S285/00; Y10S285/907; Y10T; Y10T403/00; Y10T403/70; Y10T403/7005
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
108 words
A swivel stop comprising: (a) a lower tube and an upper tube; (b) a member partially secured within said lower tube and partially extending therefrom and formed with a keyway and a stop; (c) a sleeve secured within said upper tube and provided with a pair of angularly offset and axially spaced apart keys; (d) said partially extending portion of said member, designed to fit into and within said sleeve; (e) said keys projecting radially inwardly from said sleeve; (f) said keys designed to be axially displaceable within said keyway; and (g) said tubes being rotatable relative to one another until one of said keys strikes said stop.
Claim 2
Dependent Claim
108 words
A swivel stop comprising: (a) a lower tube and an upper tube; (b) a member partially secured within said lower tube and partially extending therefrom and formed with a keyway and a stop; (c) a sleeve secured within said upper tube and provided with a pair of angularly offset and axially spaced apart keys; (d) said partially extending portion of said member, designed to fit into and within said sleeve; (e) said keys projecting radially inwardly from said sleeve; (f) said keys designed to be axially displaceable within said keyway; and (g) said tubes being rotatable relative to one another until one of said keys strikes said stop.
Claim 3
Dependent Claim
19 words
The swivel stop of claim 1 wherein said lower and upper tubes have substantially identical inner and outer diameters.
Claim 4
Dependent Claim
19 words
The swivel stop of claim 1 wherein said lower tube is designed to fit telescopically within said upper tube.
Claim 5
Dependent Claim
15 words
The swivel stop of claim 1 wherein said member is formed with an axial hole.
Claim 6
Dependent Claim
40 words
The swivel stop of claim 4 wherein said partially secured portion of said member is cylindrical in configuration and provided with a plurality of external, radial and axial grooves designed to facilitate said member being secured within said lower tube.
Claim 7
Dependent Claim
34 words
The swivel stop of claim 4 wherein said partially extended portion of said member comprises a head and a neck, with said keyway formed in said head and said stop formed on said neck.
Claim 8
Dependent Claim
24 words
The swivel stop of claim 6 wherein said stop extends along the axial length of said neck and is radially flush with said head.
Claim 9
Dependent Claim
24 words
The swivel stop of claim 7 wherein the external surface of said head is designed frictionally to engage the inner surface of said sleeve.
Claim 10
Dependent Claim
25 words
The swivel stop of claim 8 wherein the external surface of said stop also is designed frictionally to engage the inner surface of said sleeve.
Claim 11
Dependent Claim
21 words
The swivel stop of claim 6 wherein the axial length of said neck is determined by said axially spaced apart keys.
Claim 12
Dependent Claim
25 words
The swivel stop of claim 6 wherein the axial length of said neck is more than twice the distance of said axially spaced apart keys.
Claim 13
Dependent Claim
29 words
The swivel stop of claim 1 wherein said stop is designed to limit the angular displacement of said upper tube relative to said lower tube to less than 360°.
References Cited (Backward Citations)
US2242303A
Cited
US2262585A
Cited
US2686067A
Cited
US3104067A
Cited
US3034809A
Cited
US3784235A
Cited
GB2003244A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-31 | 1988-01-30 | 1988-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-31 | 1992-01-30 | 1992-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-31 | 1996-01-30 | 1996-07-31 | $7700.00 | Window Closed / Lapsed |