Patent US3692278A successfully refreshed from Google Patents.
US3692278A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carpet stretcher with ratchet handle
Assignee: ROBERT CONSOLIDATED INDUSTRIES Inc
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Filing: 1971-12-27
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Granted: 1972-09-19
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Expires: 1991-12-27
Abstract
Abstract A hand powered carpet stretcher is provided with the improvement of ratchet means carried by the stretcher handle to permit locking of the stretcher head at any of a plurality of extensions with remote actuation means to lock the ratchet so that the stretcher can be operated with a single handed motion. Positioning of the ratchet means in the handle of the stretcher permits a structure with minimum bulk and with a lever advantage of the ratchet mechanism which increases with increasing loading.
Inventors
- 👤 Buford L Payson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:43
CPC Classifications
A; A47; A47G; A47G27/00; A47G27/04; A47G27/0487; A47G27/0493
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
219 words
In a hand powered carpet stretcher wherein a head bearing pins adapted to engage a carpet is assembled to one end of an elongated member having its opposite end in a joined sliding connection to a base member and one end of a lever member is in a jointed pivoting connection to a forward portion of the assembly of said head and elongated member and, at an intermediate position along its length, is in a joined fulcrum connection to one end of a link member which has its opposite end joined in a pivoting connection to said base member, the improvement comprising ratchet means formed by an arcuate rack carried by one of said lever and link members and having at least a portion of its arc extending through the included angle at the pivotable connection between said lever and said link member with pawl means carried by the other of said lever and link members and positioned opposite said ratchet means by a support permitting its movement into and out of engagement with said ratchet means and pawl actuating means linking said pawl means to said lever means whereby said pawl means can be moved into and out of disengagement from said ratchet means and said lever can be moved by a single-handed movement of an operator thereof.
Claim 2
Dependent Claim
219 words
In a hand powered carpet stretcher wherein a head bearing pins adapted to engage a carpet is assembled to one end of an elongated member having its opposite end in a joined sliding connection to a base member and one end of a lever member is in a jointed pivoting connection to a forward portion of the assembly of said head and elongated member and, at an intermediate position along its length, is in a joined fulcrum connection to one end of a link member which has its opposite end joined in a pivoting connection to said base member, the improvement comprising ratchet means formed by an arcuate rack carried by one of said lever and link members and having at least a portion of its arc extending through the included angle at the pivotable connection between said lever and said link member with pawl means carried by the other of said lever and link members and positioned opposite said ratchet means by a support permitting its movement into and out of engagement with said ratchet means and pawl actuating means linking said pawl means to said lever means whereby said pawl means can be moved into and out of disengagement from said ratchet means and said lever can be moved by a single-handed movement of an operator thereof.
Claim 3
Dependent Claim
28 words
The stretcher of claim 1 wherein spring means are carried by said mating member operative to bias said pawl means into one of said engagement and disengagement positions.
Claim 4
Dependent Claim
23 words
The stretcher means of claim 2 wherein said rack is carried by said link member and said pawl is carried by said lever.
Claim 5
Dependent Claim
28 words
The stretcher of claim 2 wherein said rack has teeth spaced about its periphery to provide a progressively decreasing incremental advance of said head with increasing extension thereof.
Claim 6
Dependent Claim
32 words
The stretcher of claim 3 wherein said lever has an inverted U-shaped cross section with its side webs bored to seat pivot pin means for said pivotable connection to said link member.
Claim 7
Dependent Claim
31 words
The stretcher of claim 5 wherein said pawl means is pivotably supported by said lever on a pin extending into bored seats in each of the side webs of said lever.
Claim 8
Dependent Claim
24 words
The stretcher of claim 2 wherein said pawl actuating means comprises cable means extending from said pawl to the free end of said handle.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |