US3791624A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extendible tube assembly
Assignee: ROBERT CONSOLIDATED INDUSTRIES Inc
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Filing: 1973-02-05
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Granted: 1974-02-12
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Expires: 1993-02-05
Abstract
Abstract An extendible and locking assembly of telescoping tubular members is described which can be secured in a carpet stretcher system to provide a unique and highly efficient action in use of the stretcher. The assembly comprises a pair of telescoping tubes, one of which bears a lock tube and the other bears a sliding lock that fits about the tube and prevents retraction of the members. Manual release means are provided on the sliding lock to permit its release when the members are to be retracted. When used in a carpet stretcher assembly a unique ''''pump and pull'''' action results in which the stretcher head or the tubes can be extended simply by depressing and reaising the handle of the stretcher. This avoids the conventional and tedious shifting and relocating of the stretcher head. The assembly is preferably used in combination with a ratchet lock power stretcher.
Inventors
- 👤 B Payson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:01
CPC Classifications
A; A47; A47G; A47G27/00; A47G27/04; A47G27/0487; A47G27/0493; Y; Y10; Y10T; Y10T403/00; Y10T403/59
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
201 words
An assembly of extendible, telescoping tubular members having lock means preventing their retraction which comprises: an outer tubular member; an inner tubular member concentric in said outer tubular member; an elongated locking member secured at one of its ends in one of said members with its opposite end projectintg within the other tubular member and extending a substantial distance therealong; lock means comprising a collar about said elongated member and looselY carried by the other of said members by attachment means to one edge of said collar to provide a free edge thereof that is movable to permit tilting of said collar between a first position in locking engagement with said elongated locking member to prevent relative movement in one direction between said tubular members and a second position releasing said collar from said elongated locking member and permitting relative movement between said tubular members in a direction opposite to said one direction; resilient means engageable by seat means carried by said other of said tubular members and biased against said collar to urge it into said first position; and release means engageable with said collar whereby the collar can be manually moved from its said first to its second position.
Claim 2
Dependent Claim
201 words
An assembly of extendible, telescoping tubular members having lock means preventing their retraction which comprises: an outer tubular member; an inner tubular member concentric in said outer tubular member; an elongated locking member secured at one of its ends in one of said members with its opposite end projectintg within the other tubular member and extending a substantial distance therealong; lock means comprising a collar about said elongated member and looselY carried by the other of said members by attachment means to one edge of said collar to provide a free edge thereof that is movable to permit tilting of said collar between a first position in locking engagement with said elongated locking member to prevent relative movement in one direction between said tubular members and a second position releasing said collar from said elongated locking member and permitting relative movement between said tubular members in a direction opposite to said one direction; resilient means engageable by seat means carried by said other of said tubular members and biased against said collar to urge it into said first position; and release means engageable with said collar whereby the collar can be manually moved from its said first to its second position.
Claim 3
Dependent Claim
28 words
The assembly of claim 1 wherein said elongated locking member is secured to said outer tubular member and said lock means is carried in said inner tubular member.
Claim 4
Dependent Claim
43 words
The assembly of claim 1 wherein said elongated locking member is secured to said one of said members by attachment means permitting a limited degree of radial movement of said tubular and elongated locking members whereby said members will be in axial alignment.
Claim 5
Dependent Claim
67 words
The assembly of claim 2 wherein said elongated member has at said opposite end a bearing means in contact with the inner periphery of said inner tubular member and wherein said bearing means is attached to said elongated locking member by locking member attachment means permitting a limited degree of radial movement of said tubular and elongated locking members whereby said members will be in axial alignment.
Claim 6
Dependent Claim
58 words
The assembly of claim 4 wherein both said elongated locking member attachment means comprises a plug carried by said outer member adjacent one end thereof, a central bore through said plug and a screw of lesser diameter than said bore projecting therethrough and into a threaded tap in the end and on the centerline of said elongated member.
Claim 7
Dependent Claim
57 words
The assembly of claim 1 wherein said release means comprises a rod extending along the inner member and eccentric thereto and having one end engageable with the free edge of said collar, actuating means carried adjacent the free end of said inner member and link means interconnecting the opposite end of said rod with said actuating means.
Claim 8
Dependent Claim
61 words
The assembly of claim 1 wherein said release means comprises a third tubular member concentrically disposed within said inner tubular member with one end thereof engageable against the free edge of said collar, hand lever means carried at the free end of said inner member, and link means interconnecting the opposite end of said third tubular member with said lever means.
Claim 9
Dependent Claim
31 words
The assembly of claim 1 wherein said seat means comprises a second collar surrounding said elongated locking member in a freely sliding relationship and attached rigidly to said inner tubular member.
Claim 10
Dependent Claim
90 words
The device defined by claim 1, in which one of the tubular members is attached to the base of a power carpet stretcher having a carpet engaging head, a handle pivotably attached to said head, a link member having one end attached at one end in a fulcrum relationship to said handle and pivotably attached at its other end to said base, said handle having adjacent its outer end a hand lever attached by a cable to the release means of the assembly and movable to operate said release means.
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) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |